diff --git a/.gitignore b/.gitignore
index 1449474..3a85790 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
 # https://dart.dev/guides/libraries/private-files
 # Created by `dart pub`
 .dart_tool/
-tdd_*.md
diff --git a/README.md b/README.md
index d8ef3b1..25fa79d 100644
--- a/README.md
+++ b/README.md
@@ -58,337 +58,23 @@ integerToRoman(0);    // Throws: ArgumentError
 
 ---
 
-### 2. Bowling Game ✅
+### 2. [Next Kata Name] 🚧
 
-**Implementation:** [`lib/bowling_game.dart`](lib/bowling_game.dart)  
-**Tests:** [`test/bowling_game_test.dart`](test/bowling_game_test.dart)
+**Status:** Not yet started  
+**Implementation:** `lib/[next_kata].dart`  
+**Tests:** `test/[next_kata]_test.dart`
 
-Calculates scores for a bowling game following official scoring rules with look-ahead bonus logic for strikes and spares.
-
-#### Domain Context
-
-A bowling game consists of 10 frames where players roll a ball to knock down pins:
-
-**Scoring Rules:**
-1. **Normal Frame:** Sum of pins knocked down (e.g., 3 + 4 = 7)
-2. **Spare (/):** All 10 pins in 2 rolls → Score = 10 + next 1 roll
-3. **Strike (X):** All 10 pins in 1 roll → Score = 10 + next 2 rolls
-4. **10th Frame:** Bonus rolls awarded if spare or strike achieved
-
-#### Key Design Decisions
-
-**State Management:** Stores all rolls in a list and calculates score by iterating through frames, not individual rolls.
-
-**Look-Ahead Logic:** Spares and strikes require examining future rolls for bonus calculation—the algorithm walks forward strategically.
-
-**Frame Advancement:** Strikes consume 1 roll, spares/normal frames consume 2 rolls—the algorithm tracks position correctly.
-
-#### Usage
-
-```dart
-import 'package:tdd_katas/bowling_game.dart';
-
-final game = BowlingGame();
-game.roll(10); // Strike!
-game.roll(3);
-game.roll(4);
-// ... continue rolling
-print(game.score()); // Calculates total with bonuses
-```
-
-#### The "Aha!" Moment
-
-Tests for simple cases (gutter game, one spare, one strike) drove an algorithm that automatically handles complex scenarios like perfect games (300 points) without explicit implementation. **This is TDD's magic—correct abstractions emerge naturally.**
+*Coming soon...*
 
 ---
 
-### 3. Gilded Rose ✅
+### 3. [Third Kata Name] 🚧
 
-**Implementation:** [`lib/gilded_rose.dart`](lib/gilded_rose.dart)  
-**Tests:** [`test/gilded_rose_test.dart`](test/gilded_rose_test.dart)
+**Status:** Not yet started  
+**Implementation:** `lib/[third_kata].dart`  
+**Tests:** `test/[third_kata]_test.dart`
 
-A legacy code refactoring kata demonstrating how to safely transform deeply nested conditionals into clean, extensible code using characterization tests and the Strategy pattern.
-
-#### Domain Context
-
-An inn's inventory system that updates item quality daily based on complex business rules:
-
-**Item Types:**
-
-1. **Normal Items:** Quality decreases by 1/day, 2/day after sell-by date
-2. **Aged Brie:** Quality increases by 1/day, 2/day after expiration (improves with age!)
-3. **Sulfuras (Legendary):** Never changes, quality always 80, never "expires"
-4. **Backstage Passes:** Complex appreciation:
-   - More than 10 days: +1 quality/day
-   - 10 days or less: +2 quality/day
-   - 5 days or less: +3 quality/day
-   - After concert (sellIn < 0): Quality drops to 0
-5. **Conjured Items:** Degrade twice as fast as normal items (2/day, 4/day after expiration)
-
-**Domain Constraints:**
-- Quality never negative (≥ 0)
-- Quality never exceeds 50 (except Sulfuras at 80)
-- Cannot modify the `Item` class (goblin constraint!)
-
-#### Key Design Decisions
-
-**Characterization Testing:** Before touching legacy code, created 17 tests to capture existing behavior as a "safety net." Includes a Golden Master test simulating 30 days.
-
-**Strategy Pattern:** Each item type gets its own updater class implementing `ItemUpdater` interface. Eliminates conditional branching and enables Open-Closed Principle.
-
-**Helper Methods & Constants:** `_degradeQuality()` and `_improveQuality()` with automatic clamping eliminate scattered boundary checks. Domain constants (`_minQuality`, `_maxQuality`) remove magic numbers.
-
-**Factory Pattern:** `_selectUpdater()` method chooses the appropriate strategy based on item name, enabling polymorphic dispatch.
-
-#### The Refactoring Journey
-
-**Phase 1: Understand Legacy Code**
-```dart
-// 60+ lines of 7-8 level nested conditionals
-// Nearly incomprehensible logic mixing all item types
-```
-
-**Phase 2: Characterization Tests (GREEN Phase)**
-- 14 comprehensive tests covering all item types
-- Golden Master test: 30-day simulation baseline
-- Result: **Safety net established** ✅
-
-**Phase 3: Refactor with Confidence (3 steps)**
-
-**Step 1 - Extract Methods (REFACTOR):**
-```dart
-// Before: 60 lines of nested hell
-// After: Clean if-else delegating to 4 private methods
-_updateNormalItem(), _updateAgedBrie(), 
-_updateBackstagePasses(), _updateSulfuras()
-```
-
-**Step 2 - Strategy Pattern (REFACTOR):**
-```dart
-abstract class ItemUpdater {
-  void update(Item item);
-}
-
-class NormalItemUpdater implements ItemUpdater { ... }
-class AgedBrieUpdater implements ItemUpdater { ... }
-// ... 4 concrete strategies
-```
-
-**Step 3 - Domain Helpers (REFACTOR):**
-```dart
-const int _minQuality = 0;
-const int _maxQuality = 50;
-
-void _degradeQuality(Item item, int amount) {
-  item.quality = (item.quality - amount).clamp(_minQuality, _maxQuality);
-}
-```
-
-**Phase 4: Add Conjured Items (RED-GREEN)**
-
-**RED:** Added 3 failing tests for Conjured items behavior  
-**GREEN:** Created `ConjuredItemUpdater` class—**one class, one condition**  
-**Result:** Feature added in minutes thanks to refactoring!
-
-#### Usage
-
-```dart
-import 'package:tdd_katas/gilded_rose.dart';
-
-final items = [
-  Item('Normal Sword', 10, 20),
-  Item('Aged Brie', 2, 0),
-  Item('Sulfuras, Hand of Ragnaros', 0, 80),
-  Item('Backstage passes to a TAFKAL80ETC concert', 15, 20),
-  Item('Conjured Mana Cake', 3, 6),
-];
-
-final gildedRose = GildedRose(items);
-gildedRose.updateQuality(); // Updates all items per domain rules
-```
-
-#### The "Aha!" Moments
-
-1. **Characterization Tests = Freedom:** With tests in place, aggressive refactoring felt safe. Every change validated instantly.
-
-2. **Strategy Pattern = Extensibility:** Adding Conjured items took **5 minutes**. Before refactoring, it would have meant diving into nested conditionals and risking bugs.
-
-3. **Small Steps = Big Wins:** Three refactoring commits transformed spaghetti into clean code. Each step kept tests GREEN, proving behavior preservation.
-
-4. **Open-Closed Principle in Action:** New item types don't modify existing code—they just add new updater classes. The system is "open for extension, closed for modification."
-
----
-
-### 4. String Calculator ✅
-
-**Implementation:** [`lib/string_calculator.dart`](lib/string_calculator.dart)  
-**Tests:** [`test/string_calculator_test.dart`](test/string_calculator_test.dart)
-
-A Bug Hunt Kata demonstrating how to use TDD to discover and fix bugs in existing code. Each bug is exposed with a RED test, then fixed with GREEN implementation.
-
-#### Domain Context
-
-A simple calculator that sums numbers from a string input with various delimiter support:
-
-**Features:**
-
-1. **Empty String:** Returns 0
-2. **Single Number:** Returns that number (`"5"` → 5)
-3. **Comma Delimiter:** Sums comma-separated numbers (`"1,2,3"` → 6)
-4. **Custom Delimiters:** Supports format `"//[delimiter]\n[numbers]"` (`"//;\n1;2"` → 3)
-5. **Ignore Large Numbers:** Numbers > 1000 are ignored (`"2,1001"` → 2)
-
-#### The Bug Hunt Approach
-
-**Different from Previous Katas:** This wasn't built test-first. Instead, we started with **buggy working code** and used tests to expose and fix bugs one by one.
-
-**Bug Hunt Process:**
-1. **RED:** Write test exposing a specific bug
-2. **GREEN:** Fix only that bug
-3. **Commit:** Document the bug found and fixed
-4. **Repeat:** Move to next bug
-
-#### Bugs Found & Fixed
-
-**Bug #1: Empty String Returns Wrong Value**
-- **Bug:** Returned 1 instead of 0
-- **Test:** `expect(calculator.add(''), equals(0))`
-- **Fix:** Changed return value from 1 to 0
-- **Commits:** RED → GREEN
-
-**Bug #2: Single Number Off-By-One**
-- **Bug:** Added +1 to parsed number
-- **Test:** `expect(calculator.add('5'), equals(5))`
-- **Expected:** 5, **Actual:** 6
-- **Fix:** Removed `+ 1` from parsing
-- **Commits:** RED → GREEN
-
-**Bug #3: Summation Loop Misses Last Element**
-- **Bug:** Loop condition `i < length - 1` skipped last item
-- **Test:** `expect(calculator.add('1,2'), equals(3))`
-- **Expected:** 3, **Actual:** 1
-- **Fix:** Changed to `i < length`
-- **Commits:** RED → GREEN
-
-**Bug #4: Custom Delimiter Not Extracted**
-- **Bug:** Delimiter extraction line was commented out
-- **Test:** `expect(calculator.add('//;\n1;2'), equals(3))`
-- **Error:** FormatException trying to parse '1;2'
-- **Fix:** Uncommented `delimiter = parts[0].substring(2)`
-- **Commits:** RED → GREEN
-
-**Bug #5: Missing Feature - Ignore Numbers > 1000**
-- **Bug:** All numbers included in sum
-- **Test:** `expect(calculator.add('2,1001'), equals(2))`
-- **Expected:** 2, **Actual:** 1003
-- **Fix:** Added `.where((n) => n <= 1000)` filter
-- **Commits:** RED → GREEN
-
-#### Usage
-
-```dart
-import 'package:tdd_katas/string_calculator.dart';
-
-final calculator = StringCalculator();
-
-calculator.add('');              // Returns: 0
-calculator.add('5');             // Returns: 5
-calculator.add('1,2,3');         // Returns: 6
-calculator.add('//;\n1;2');      // Returns: 3
-calculator.add('2,1001');        // Returns: 2 (1001 ignored)
-```
-
-#### The "Aha!" Moments
-
-1. **Tests as Bug Detectors:** Each test acted like a spotlight, illuminating exactly ONE bug at a time. No guessing—the test tells you what's broken.
-
-2. **RED-GREEN Still Works:** Even when fixing bugs (not adding features), the RED-GREEN rhythm provides safety. You're never fixing blind.
-
-3. **Regression Prevention:** After fixing each bug, ALL previous tests stay green. This proves you didn't break something while fixing something else.
-
-4. **Incremental Debugging:** Fixing one bug at a time with commits creates a clear audit trail. You can see exactly what each bug was and how it was fixed.
-
-5. **Real-World Skill:** This mirrors production work—most code you touch is existing code with bugs, not greenfield TDD.
-
----
-
-### 5. Mars Rover ✅
-
-**Implementation:** [`lib/mars_rover.dart`](lib/mars_rover.dart)  
-**Tests:** [`test/mars_rover_test.dart`](test/mars_rover_test.dart)
-
-A Command Pattern kata simulating a robotic rover navigating a plateau on Mars. Demonstrates clean separation of concerns, value objects, and command-based control.
-
-#### Domain Context
-
-A rover explores a rectangular plateau with coordinate-based navigation:
-
-**Core Concepts:**
-- **Position:** (x, y) coordinates on the plateau grid
-- **Direction:** Cardinal directions (N, E, S, W)
-- **Plateau:** Grid with defined boundaries that wrap around (toroidal topology)
-
-**Commands:**
-- `L` - Turn left 90 degrees (changes direction, not position)
-- `R` - Turn right 90 degrees (changes direction, not position)
-- `M` - Move forward one grid point in current direction
-
-**Example Navigation:**
-```
-Starting: (0,0) facing North
-Commands: "MMRMMLM"
-- MM: Move to (0,2) facing North
-- R: Turn to face East (still at 0,2)
-- MM: Move to (2,2) facing East
-- L: Turn to face North (still at 2,2)
-- M: Move to (2,3) facing North
-Result: (2,3) facing North
-```
-
-#### Key Design Decisions
-
-**Direction Enum:** Encapsulates rotation logic using modular arithmetic. Each direction knows how to turn left/right, eliminating conditional branching.
-
-**Value Objects:** 
-- `Position` is immutable—movement returns new position instances
-- `Plateau` encapsulates boundary wrapping logic
-- Prevents invalid states at the type level
-
-**Command Pattern (Implicit):** The `execute()` method delegates to command handlers (`turnLeft()`, `turnRight()`, `moveForward()`). Each command is isolated and testable.
-
-**Wrapping Logic:** Plateau boundaries wrap around (toroidal topology). Moving past edge (e.g., x=5→6 on 5x5 grid) wraps to opposite side (x=0).
-
-#### Usage
-
-```dart
-import 'package:tdd_katas/mars_rover.dart';
-
-// Create rover at position (1,2) facing North on 5x5 plateau
-final rover = Rover(
-  x: 1, 
-  y: 2, 
-  direction: 'N',
-  plateauWidth: 5,
-  plateauHeight: 5,
-);
-
-rover.execute('LMLMLMLMM');
-
-print('Position: (${rover.x}, ${rover.y})'); // Position: (1, 3)
-print('Direction: ${rover.direction}');      // Direction: N
-```
-
-#### The "Aha!" Moments
-
-1. **Enums as Behavior Carriers:** Direction enum doesn't just store values—it encapsulates rotation logic. Turning left/right becomes `direction.turnLeft()`, eliminating lookup tables.
-
-2. **Value Objects Prevent Bugs:** Immutable `Position` means movement can't corrupt state. New position calculated, validated, then assigned. Boundary wrapping isolated in `Plateau`.
-
-3. **Switch Expressions Shine:** Modern Dart's `switch` expression makes direction-based movement elegant and exhaustive. Compiler enforces handling all directions.
-
-4. **Modular Arithmetic for Rotation:** `(index + 1) % 4` handles right rotation elegantly. No if-statements, no edge cases—math models the domain perfectly.
-
-5. **Refactoring Without Fear:** Two refactoring commits drastically improved code structure. Tests stayed green throughout, proving behavior preservation.
+*Coming soon...*
 
 ---
 
@@ -400,10 +86,6 @@ dart test
 
 # Run specific test file
 dart test test/roman_numerals_test.dart
-dart test test/bowling_game_test.dart
-dart test test/gilded_rose_test.dart
-dart test test/string_calculator_test.dart
-dart test test/mars_rover_test.dart
 
 # Run with coverage
 dart test --coverage
@@ -478,312 +160,13 @@ Boundary tests for the valid range (1-3999)
 
 ---
 
-## Bowling Game: Detailed Journey
-
-### Test Strategy
-
-Tests are organized by **scoring complexity**, mirroring how the domain rules build on each other:
-
-**Basic Scoring:**
-- Gutter game (all zeros)
-- All ones (simple addition)
-
-**Spare Bonus (next 1 roll):**
-- One spare in first frame
-- All spares (150 points)
-
-**Strike Bonus (next 2 rolls):**
-- One strike in first frame
-- Perfect game (300 points)
-
-**Complex Scenarios:**
-- Combinations of strikes, spares, and normal frames
-
-### Development Timeline
-
-1. **Red:** Gutter game test
-2. **Green:** Return 0 (simplest implementation)
-3. **Red:** All ones test
-4. **Green:** Store rolls, sum them in `score()`
-5. **Refactor:** Extract `rollMany()` helper, add `setUp()`
-6. **Red:** One spare test
-7. **Green:** Detect spare, add look-ahead bonus (+1 roll)
-8. **Refactor:** Extract `_isSpare()` helper
-9. **Red:** One strike test
-10. **Green:** Detect strike, add look-ahead bonus (+2 rolls)
-11. **Refactor:** Extract `_isStrike()`, clean up frame advancement
-12. **Validate:** Perfect game test passes without modification!
-
-### Key Insights
-
-**Emergent Design:** The algorithm structure wasn't planned upfront. Tests for simple cases forced:
-- Frame-based iteration (not roll-based)
-- Index tracking (advancing by 1 or 2)
-- Look-ahead logic (accessing future rolls)
-
-**The Perfect Game Moment:** Writing code to handle "one spare" and "one strike" automatically handled "12 consecutive strikes" (300 points). The algorithm correctly models the domain, so all valid games work.
-
-**State vs. Behavior:** Initially tempting to model Frame objects with state. TDD revealed a simpler truth: just store rolls and calculate on-demand. No frame objects needed.
-
----
-
-## Gilded Rose: Detailed Journey
-
-### The Legacy Code Challenge
-
-Unlike the previous two katas (greenfield TDD), Gilded Rose simulates **real-world legacy code refactoring**. You inherit messy, working code with no tests and must:
-1. Understand what it does (without breaking it)
-2. Add tests to capture behavior
-3. Refactor safely
-4. Add new features
-
-### Test Strategy
-
-Tests are organized by **item type behavior** and include a **Golden Master**:
-
-**Normal Items:**
-- Quality degradation (1/day, 2/day after expiration)
-- Quality never negative
-
-**Aged Brie:**
-- Quality appreciation (improves with age)
-- Respects quality cap (≤ 50)
-
-**Sulfuras (Legendary Items):**
-- Never changes (quality, sellIn)
-- Always quality 80
-
-**Backstage Passes:**
-- Threshold-based appreciation (10 days, 5 days)
-- Drops to 0 after concert
-
-**Conjured Items (new feature):**
-- Degrades 2x faster than normal items
-
-**Golden Master Test:**
-- 30-day simulation with all item types
-- Captures baseline output before refactoring
-- Detects any behavioral regression
-
-### Refactoring Timeline
-
-**Phase 1: Create Legacy Code**
-- Intentionally nested 7-8 levels deep
-- Mixed concerns (all item types in one method)
-- Magic numbers scattered throughout
-- Result: Represents realistic legacy code
-
-**Phase 2: Characterization Tests (GREEN)**
-- 14 comprehensive tests written before any refactoring
-- Golden Master baseline captured
-- Commit: `"GREEN: Add characterization tests"`
-- Result: **Safety net established** ✅
-
-**Phase 3: Refactor in Small Steps (3 REFACTOR commits)**
-
-**Step 1 - Extract Methods:**
-```dart
-// Before: 60 lines, items[i] everywhere, deeply nested
-for (var i = 0; i < items.length; i++) {
-  if (items[i].name != 'Aged Brie' && ...) {
-    if (items[i].quality > 0) {
-      if (items[i].name != 'Sulfuras...') {
-        // ... 5 more levels ...
-
-// After: Clean delegation, readable
-for (final item in items) {
-  if (item.name == 'Sulfuras, Hand of Ragnaros') {
-    _updateSulfuras(item);
-  } else if (item.name == 'Aged Brie') {
-    _updateAgedBrie(item);
-  // ...
-}
-```
-Commit: `"REFACTOR: Extract item type methods from nested conditionals"`
-
-**Step 2 - Introduce Strategy Pattern:**
-```dart
-abstract class ItemUpdater {
-  void update(Item item);
-}
-
-class NormalItemUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    _degradeQuality(item, 1);
-    item.sellIn -= 1;
-    if (item.sellIn < 0) {
-      _degradeQuality(item, 1);
-    }
-  }
-}
-// ... 4 concrete strategies
-
-ItemUpdater _selectUpdater(Item item) { ... }
-```
-Commit: `"REFACTOR: Introduce Strategy pattern for item types"`
-
-**Step 3 - Extract Domain Helpers:**
-```dart
-const int _minQuality = 0;
-const int _maxQuality = 50;
-
-void _degradeQuality(Item item, int amount) {
-  item.quality = (item.quality - amount).clamp(_minQuality, _maxQuality);
-}
-
-void _improveQuality(Item item, int amount) {
-  item.quality = (item.quality + amount).clamp(_minQuality, _maxQuality);
-}
-```
-Commit: `"REFACTOR: Extract helper methods and domain constants"`
-
-All 14 tests stayed **GREEN** throughout! 🟢
-
-**Phase 4: Add Conjured Items (RED-GREEN-REFACTOR)**
-
-**RED:** Write failing tests
-```dart
-test('degrade in quality twice as fast as normal items', () {
-  final items = [Item('Conjured Mana Cake', 10, 20)];
-  GildedRose(items).updateQuality();
-  expect(items[0].quality, equals(18)); // -2 instead of -1
-});
-```
-Result: 2 tests **FAILING** ❌ (Expected: 18, Actual: 19)  
-Commit: `"RED: Add failing tests for Conjured items"`
-
-**GREEN:** Implement minimal solution
-```dart
-class ConjuredItemUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    _degradeQuality(item, 2); // 2x normal rate
-    item.sellIn -= 1;
-    if (item.sellIn < 0) {
-      _degradeQuality(item, 2); // 4x total after expiration
-    }
-  }
-}
-
-ItemUpdater _selectUpdater(Item item) {
-  // ... existing checks ...
-  } else if (item.name.startsWith('Conjured')) {
-    return ConjuredItemUpdater();
-  } else {
-    return NormalItemUpdater();
-  }
-}
-```
-Result: All 17 tests **PASSING** ✅  
-Commit: `"GREEN: Implement Conjured items degrading twice as fast"`
-
-**REFACTOR:** Already clean! No duplication, clear names, reusing helpers.  
-Decision: Skip refactor commit—code is already excellent.
-
-### Development Metrics
-
-| Metric | Before Refactoring | After Refactoring |
-|--------|-------------------|-------------------|
-| **Cyclomatic Complexity** | ~25 (very high) | ~3 per class (low) |
-| **Lines per Method** | 60+ | 5-10 |
-| **Max Nesting** | 7-8 levels | 2 levels |
-| **Time to Add Feature** | Hours (risky) | Minutes (safe) |
-| **Test Coverage** | 0% → 100% | 100% (maintained) |
-
-### Key Insights
-
-**Characterization Tests Are Your Lifeline:** Without tests, refactoring is guesswork. With tests, it's engineering. Every change validated in milliseconds.
-
-**Small Steps = Low Risk:** Three refactoring commits, each preserving behavior. No "big bang" rewrite—steady, safe progress.
-
-**Strategy Pattern = Future-Proofing:** Adding Conjured items demonstrated the payoff:
-- **Before refactoring:** Would require diving into nested conditionals, risking bugs
-- **After refactoring:** One new class, one condition, done in 5 minutes
-
-**Golden Master Testing:** The 30-day simulation test caught edge cases that individual unit tests missed. It serves as a comprehensive regression detector.
-
-**Open-Closed Principle Validated:** New item types extend the system without modifying existing updater classes. The design is "open for extension, closed for modification."
-
-**Refactoring ≠ Rewriting:** We never changed what the code does, only how it's structured. Tests prove behavioral equivalence at every step.
-
----
-
-## Comparing the Katas
-
-### All Five Katas at a Glance
-
-| Aspect | Roman Numerals | Bowling Game | Gilded Rose | String Calculator | Mars Rover |
-|--------|----------------|--------------|-------------|-------------------|------------|
-| **Complexity** | Beginner | Intermediate | Advanced | Beginner | Intermediate |
-| **Approach** | Greenfield TDD | Greenfield TDD | Legacy refactoring | Bug hunting | Greenfield TDD |
-| **State** | Stateless | Stateful | Stateful | Stateless | Stateful |
-| **Algorithm** | Table-driven | Frame iteration | Strategy pattern | String parsing | Command pattern |
-| **Key Challenge** | Pattern recognition | State & bonuses | Refactoring safely | Finding bugs | Navigation & wrapping |
-| **Design Pattern** | Value Object | Implicit strategy | Explicit strategy | Filters & pipes | Command + Value Objects |
-| **Lines of Code** | ~45 production | ~30 production | ~120 production | ~25 production | ~95 production |
-| **Test Count** | ~15 tests | ~10 tests | ~17 tests | 6 tests | 23 tests |
-| **Aha! Moment** | Table = data | Simple → complex | Refactor = safe | Tests find bugs | Enums carry behavior |
-
-### What Each Kata Teaches
-
-**Roman Numerals:**
-**Roman Numerals:**
-- Converting domain rules into data structures
-- Value Objects for enforcing constraints
-- When to stop coding (algorithm emerges naturally)
-
-**Bowling Game:**
-- State management without over-engineering
-- Look-ahead logic in sequential data
-- How correct abstractions scale beyond test cases
-
-**Gilded Rose:**
-- Safely refactoring legacy code with characterization tests
-- Strategy pattern for eliminating conditional complexity
-- Open-Closed Principle for extensibility
-- Working effectively with code you didn't write
-
-**String Calculator:**
-- Using tests to expose bugs in existing code
-- Bug hunting with RED-GREEN discipline
-- Incremental debugging with clear commits
-- Regression prevention through test accumulation
-
-**Mars Rover:**
-- Command pattern for behavior delegation
-- Value Objects for domain modeling (Position, Plateau, Direction)
-- Enums as behavior carriers, not just constants
-- Coordinate systems and wrapping logic
-- Progressive refactoring with confidence
-
-### Progressive Learning Path
-
-1. **Roman Numerals first:** Learn TDD fundamentals without state complexity
-2. **Bowling Game second:** Apply TDD to stateful problems
-3. **Mars Rover third:** Master Command pattern and value objects
-4. **Gilded Rose fourth:** Refactor legacy code with tests as safety net
-5. **String Calculator fifth:** Practice bug hunting and fixing with TDD
-6. **Next kata:** Choose based on what you want to practice:
-   - **Prime Factors:** Mathematical decomposition, algorithmic thinking
-   - **Tennis Scoring:** State machines, domain language
-   - **FizzBuzz:** Classic conditional logic exercise
-
----
-
 ## References
 
-### General TDD & Clean Code
-- [Gilded Rose Kata](https://github.com/emilybache/GildedRose-Refactoring-Kata)
+- [Roman Numerals Rules](https://en.wikipedia.org/wiki/Roman_numerals)
 - [Clean Code by Robert C. Martin](https://www.oreilly.com/library/view/clean-code-a/9780136083238/)
 - [Domain-Driven Design by Eric Evans](https://www.domainlanguage.com/ddd/)
 - [Test-Driven Development by Kent Beck](https://www.amazon.com/Test-Driven-Development-Kent-Beck/dp/0321146530)
 
-### Kata-Specific
-- [Roman Numerals Rules](https://en.wikipedia.org/wiki/Roman_numerals)
-- [Bowling Scoring Rules](https://en.wikipedia.org/wiki/Ten-pin_bowling#Scoring)
-- [Uncle Bob's Bowling Game Kata](http://butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata)
-
 ## License
 
 This is a learning exercise. Use freely for educational purposes.
diff --git a/bin/tdd_katas.dart b/bin/tdd_katas.dart
index 24f0e29..987a845 100644
--- a/bin/tdd_katas.dart
+++ b/bin/tdd_katas.dart
@@ -1,3 +1,5 @@
+import 'package:tdd_katas/roman_numerals.dart' as roman_numerals;
+
 void main(List<String> arguments) {
-  print('TDD Katas exercises, please read the README.md file.');
+  print('Hello world: ${roman_numerals.integerToRoman(1)}');
 }
diff --git a/lib/gilded_rose.dart b/lib/gilded_rose.dart
deleted file mode 100644
index 6a813d9..0000000
--- a/lib/gilded_rose.dart
+++ /dev/null
@@ -1,135 +0,0 @@
-// WARNING: DO NOT modify the Item class - the goblin in the corner will insta-rage!
-
-class Item {
-  String name;
-  int sellIn;
-  int quality;
-
-  Item(this.name, this.sellIn, this.quality);
-
-  @override
-  String toString() => '$name, $sellIn, $quality';
-}
-
-/// Quality bounds - domain constraints
-const int _minQuality = 0;
-const int _maxQuality = 50;
-
-/// Helper methods for quality management
-void _degradeQuality(Item item, int amount) {
-  item.quality = (item.quality - amount).clamp(_minQuality, _maxQuality);
-}
-
-void _improveQuality(Item item, int amount) {
-  item.quality = (item.quality + amount).clamp(_minQuality, _maxQuality);
-}
-
-/// Strategy pattern: Each item type has its own update behavior
-abstract class ItemUpdater {
-  void update(Item item);
-}
-
-class NormalItemUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    // Quality decreases by 1 each day
-    _degradeQuality(item, 1);
-
-    item.sellIn -= 1;
-
-    // After sell-by date, quality degrades twice as fast
-    if (item.sellIn < 0) {
-      _degradeQuality(item, 1);
-    }
-  }
-}
-
-class AgedBrieUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    // Quality increases as it ages
-    _improveQuality(item, 1);
-
-    item.sellIn -= 1;
-
-    // After sell-by date, quality increases twice as fast
-    if (item.sellIn < 0) {
-      _improveQuality(item, 1);
-    }
-  }
-}
-
-class BackstagePassUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    // Base quality increase
-    _improveQuality(item, 1);
-
-    // 10 days or less: +1 additional
-    if (item.sellIn <= 10) {
-      _improveQuality(item, 1);
-    }
-
-    // 5 days or less: +1 additional (total +3/day)
-    if (item.sellIn <= 5) {
-      _improveQuality(item, 1);
-    }
-
-    item.sellIn -= 1;
-
-    // After concert, quality drops to 0
-    if (item.sellIn < 0) {
-      item.quality = _minQuality;
-    }
-  }
-}
-
-class SulfurasUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    // Legendary item never changes
-    // Quality always 80, sellIn never decreases
-  }
-}
-
-class ConjuredItemUpdater implements ItemUpdater {
-  @override
-  void update(Item item) {
-    // Conjured items degrade twice as fast as normal items
-    _degradeQuality(item, 2);
-
-    item.sellIn -= 1;
-
-    // After sell-by date, quality degrades twice as fast (4x total)
-    if (item.sellIn < 0) {
-      _degradeQuality(item, 2);
-    }
-  }
-}
-
-class GildedRose {
-  List<Item> items;
-
-  GildedRose(this.items);
-
-  void updateQuality() {
-    for (final item in items) {
-      final updater = _selectUpdater(item);
-      updater.update(item);
-    }
-  }
-
-  ItemUpdater _selectUpdater(Item item) {
-    if (item.name == 'Sulfuras, Hand of Ragnaros') {
-      return SulfurasUpdater();
-    } else if (item.name == 'Aged Brie') {
-      return AgedBrieUpdater();
-    } else if (item.name == 'Backstage passes to a TAFKAL80ETC concert') {
-      return BackstagePassUpdater();
-    } else if (item.name.startsWith('Conjured')) {
-      return ConjuredItemUpdater();
-    } else {
-      return NormalItemUpdater();
-    }
-  }
-}
diff --git a/lib/mars_rover.dart b/lib/mars_rover.dart
deleted file mode 100644
index 221e450..0000000
--- a/lib/mars_rover.dart
+++ /dev/null
@@ -1,106 +0,0 @@
-enum Direction {
-  north('N'),
-  east('E'),
-  south('S'),
-  west('W');
-
-  final String code;
-  const Direction(this.code);
-
-  static Direction fromCode(String code) {
-    return Direction.values.firstWhere((d) => d.code == code);
-  }
-
-  Direction turnLeft() {
-    return Direction.values[(index + 3) % 4];
-  }
-
-  Direction turnRight() {
-    return Direction.values[(index + 1) % 4];
-  }
-}
-
-class Position {
-  final int x;
-  final int y;
-
-  Position(this.x, this.y);
-
-  Position moveNorth() => Position(x, y + 1);
-  Position moveEast() => Position(x + 1, y);
-  Position moveSouth() => Position(x, y - 1);
-  Position moveWest() => Position(x - 1, y);
-}
-
-class Plateau {
-  final int width;
-  final int height;
-
-  Plateau(this.width, this.height);
-
-  Position wrap(Position position) {
-    final wrappedX = _wrapCoordinate(position.x, width);
-    final wrappedY = _wrapCoordinate(position.y, height);
-    return Position(wrappedX, wrappedY);
-  }
-
-  int _wrapCoordinate(int value, int max) {
-    final wrapped = value % (max + 1);
-    return wrapped < 0 ? wrapped + max + 1 : wrapped;
-  }
-}
-
-class Rover {
-  Position _position;
-  Direction _direction;
-  final Plateau plateau;
-
-  Rover({
-    required int x,
-    required int y,
-    required String direction,
-    int plateauWidth = 100,
-    int plateauHeight = 100,
-  }) : _position = Position(x, y),
-       _direction = Direction.fromCode(direction),
-       plateau = Plateau(plateauWidth, plateauHeight);
-
-  int get x => _position.x;
-  int get y => _position.y;
-  String get direction => _direction.code;
-
-  void turnLeft() {
-    _direction = _direction.turnLeft();
-  }
-
-  void turnRight() {
-    _direction = _direction.turnRight();
-  }
-
-  void moveForward() {
-    final newPosition = switch (_direction) {
-      Direction.north => _position.moveNorth(),
-      Direction.east => _position.moveEast(),
-      Direction.south => _position.moveSouth(),
-      Direction.west => _position.moveWest(),
-    };
-    _position = plateau.wrap(newPosition);
-  }
-
-  void execute(String commands) {
-    for (var i = 0; i < commands.length; i++) {
-      final command = commands[i];
-      switch (command) {
-        case 'L':
-          turnLeft();
-          break;
-        case 'R':
-          turnRight();
-          break;
-        case 'M':
-          moveForward();
-          break;
-      }
-    }
-  }
-}
diff --git a/lib/string_calculator.dart b/lib/string_calculator.dart
deleted file mode 100644
index 6e5ec31..0000000
--- a/lib/string_calculator.dart
+++ /dev/null
@@ -1,55 +0,0 @@
-/// String Calculator - Buggy Implementation
-/// This code has intentional bugs for the Bug Hunt Kata exercise
-///
-/// Requirements:
-/// 1. Empty string returns 0
-/// 2. Single number returns that number
-/// 3. Two numbers comma-delimited returns sum
-/// 4. Handle newlines as delimiters
-/// 5. Support custom delimiters: "//[delimiter]\n[numbers]"
-library;
-
-class StringCalculator {
-  int add(String numbers) {
-    // Bug 1: Empty string handling
-    if (numbers.isEmpty) {
-      return 0; // Fixed: Return 0 for empty string
-    }
-
-    // Bug 2: Single number parsing
-    if (!numbers.contains(',') &&
-        !numbers.contains('\n') &&
-        !numbers.startsWith('//')) {
-      return int.parse(numbers); // Fixed: Removed off-by-one error
-    }
-
-    String delimiter = ',';
-    String numbersToProcess = numbers;
-
-    // Custom delimiter support
-    if (numbers.startsWith('//')) {
-      // Bug 4: Custom delimiter not actually used
-      final parts = numbers.split('\n');
-      delimiter = parts[0].substring(2); // Fixed: Extract custom delimiter
-      numbersToProcess = parts.skip(1).join('\n');
-    }
-
-    // Bug 3 & 4: Delimiter handling issues
-    final numList = numbersToProcess
-        .replaceAll('\n', delimiter)
-        .split(delimiter)
-        .where((s) => s.isNotEmpty)
-        .map((s) => int.parse(s))
-        .where((n) => n <= 1000) // Filter out numbers > 1000
-        .toList();
-
-    // Bug 3: Off-by-one in summation
-    int sum = 0;
-    for (int i = 0; i < numList.length; i++) {
-      // Fixed: Include last element
-      sum += numList[i];
-    }
-
-    return sum;
-  }
-}
diff --git a/test/gilded_rose_test.dart b/test/gilded_rose_test.dart
deleted file mode 100644
index f79d761..0000000
--- a/test/gilded_rose_test.dart
+++ /dev/null
@@ -1,759 +0,0 @@
-import 'package:tdd_katas/gilded_rose.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('Gilded Rose Inn - Characterization Tests', () {
-    group('Normal items', () {
-      test('quality and sellIn both decrease each day', () {
-        final items = [Item('Normal Item', 10, 20)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(9));
-        expect(items[0].quality, equals(19));
-      });
-
-      test('quality degrades twice as fast after sell-by date', () {
-        final items = [Item('Normal Item', 0, 10)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(-1));
-        expect(items[0].quality, equals(8)); // -2 quality
-      });
-
-      test('quality never becomes negative', () {
-        final items = [Item('Normal Item', 5, 0)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(0));
-      });
-    });
-
-    group('Aged Brie - appreciates over time', () {
-      test('quality increases as it ages', () {
-        final items = [Item('Aged Brie', 10, 20)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(9));
-        expect(items[0].quality, equals(21));
-      });
-
-      test('quality increases twice as fast after sell-by date', () {
-        final items = [Item('Aged Brie', 0, 20)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(-1));
-        expect(items[0].quality, equals(22)); // +2 quality
-      });
-
-      test('quality never exceeds 50', () {
-        final items = [Item('Aged Brie', 5, 50)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(50));
-      });
-    });
-
-    group('Sulfuras - legendary item', () {
-      test('quality never changes', () {
-        final items = [Item('Sulfuras, Hand of Ragnaros', 10, 80)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(80));
-      });
-
-      test('sellIn never decreases', () {
-        final items = [Item('Sulfuras, Hand of Ragnaros', 10, 80)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(10));
-      });
-    });
-
-    group('Backstage passes - concert tickets', () {
-      test('quality increases by 1 when more than 10 days away', () {
-        final items = [
-          Item('Backstage passes to a TAFKAL80ETC concert', 15, 20),
-        ];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(21)); // +1
-      });
-
-      test('quality increases by 2 when 10 days or less', () {
-        final items = [
-          Item('Backstage passes to a TAFKAL80ETC concert', 10, 20),
-        ];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(22)); // +2
-      });
-
-      test('quality increases by 3 when 5 days or less', () {
-        final items = [
-          Item('Backstage passes to a TAFKAL80ETC concert', 5, 20),
-        ];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(23)); // +3
-      });
-
-      test('quality drops to 0 after concert', () {
-        final items = [
-          Item('Backstage passes to a TAFKAL80ETC concert', 0, 20),
-        ];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].sellIn, equals(-1));
-        expect(items[0].quality, equals(0));
-      });
-
-      test('quality never exceeds 50', () {
-        final items = [
-          Item('Backstage passes to a TAFKAL80ETC concert', 5, 49),
-        ];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(50)); // capped at 50
-      });
-    });
-
-    group('Conjured items', () {
-      test('degrade in quality twice as fast as normal items', () {
-        final items = [Item('Conjured Mana Cake', 10, 20)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(18)); // -2 instead of -1
-        expect(items[0].sellIn, equals(9));
-      });
-
-      test('degrade twice as fast after sell-by date', () {
-        final items = [Item('Conjured Mana Cake', 0, 20)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(16)); // -4 instead of -2
-        expect(items[0].sellIn, equals(-1));
-      });
-
-      test('never have negative quality', () {
-        final items = [Item('Conjured Mana Cake', 5, 1)];
-        final gildedRose = GildedRose(items);
-
-        gildedRose.updateQuality();
-
-        expect(items[0].quality, equals(0));
-        expect(items[0].sellIn, equals(4));
-      });
-    });
-
-    group('Golden Master - 30-day simulation', () {
-      test('captures complete behavior of all item types over time', () {
-        final items = _createAllItemTypes();
-        final gildedRose = GildedRose(items);
-        final output = StringBuffer();
-
-        for (var day = 0; day <= 30; day++) {
-          output.writeln('-------- day $day --------');
-          output.writeln('name, sellIn, quality');
-          for (final item in items) {
-            output.writeln(item);
-          }
-          output.writeln();
-          gildedRose.updateQuality();
-        }
-
-        final expected = _goldenMasterBaseline();
-        expect(
-          output.toString(),
-          equals(expected),
-          reason: 'Golden Master mismatch - legacy behavior changed!',
-        );
-      });
-    });
-  });
-}
-
-List<Item> _createAllItemTypes() {
-  return [
-    // Normal items at various states
-    Item('Normal Item', 10, 20),
-    Item('Normal Item', 2, 5),
-    Item('Normal Item', 0, 10),
-    Item('Normal Item', -1, 10),
-    // Aged Brie
-    Item('Aged Brie', 10, 20),
-    Item('Aged Brie', 0, 30),
-    Item('Aged Brie', 5, 49),
-    // Sulfuras
-    Item('Sulfuras, Hand of Ragnaros', 10, 80),
-    Item('Sulfuras, Hand of Ragnaros', -1, 80),
-    // Backstage passes at critical thresholds
-    Item('Backstage passes to a TAFKAL80ETC concert', 15, 20),
-    Item('Backstage passes to a TAFKAL80ETC concert', 10, 20),
-    Item('Backstage passes to a TAFKAL80ETC concert', 5, 20),
-    Item('Backstage passes to a TAFKAL80ETC concert', 1, 20),
-    Item('Backstage passes to a TAFKAL80ETC concert', 0, 20),
-  ];
-}
-
-String _goldenMasterBaseline() {
-  // Generated by running the legacy code
-  // This captures the exact behavior - our safety net!
-  return '''-------- day 0 --------
-name, sellIn, quality
-Normal Item, 10, 20
-Normal Item, 2, 5
-Normal Item, 0, 10
-Normal Item, -1, 10
-Aged Brie, 10, 20
-Aged Brie, 0, 30
-Aged Brie, 5, 49
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 15, 20
-Backstage passes to a TAFKAL80ETC concert, 10, 20
-Backstage passes to a TAFKAL80ETC concert, 5, 20
-Backstage passes to a TAFKAL80ETC concert, 1, 20
-Backstage passes to a TAFKAL80ETC concert, 0, 20
-
--------- day 1 --------
-name, sellIn, quality
-Normal Item, 9, 19
-Normal Item, 1, 4
-Normal Item, -1, 8
-Normal Item, -2, 8
-Aged Brie, 9, 21
-Aged Brie, -1, 32
-Aged Brie, 4, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 14, 21
-Backstage passes to a TAFKAL80ETC concert, 9, 22
-Backstage passes to a TAFKAL80ETC concert, 4, 23
-Backstage passes to a TAFKAL80ETC concert, 0, 23
-Backstage passes to a TAFKAL80ETC concert, -1, 0
-
--------- day 2 --------
-name, sellIn, quality
-Normal Item, 8, 18
-Normal Item, 0, 3
-Normal Item, -2, 6
-Normal Item, -3, 6
-Aged Brie, 8, 22
-Aged Brie, -2, 34
-Aged Brie, 3, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 13, 22
-Backstage passes to a TAFKAL80ETC concert, 8, 24
-Backstage passes to a TAFKAL80ETC concert, 3, 26
-Backstage passes to a TAFKAL80ETC concert, -1, 0
-Backstage passes to a TAFKAL80ETC concert, -2, 0
-
--------- day 3 --------
-name, sellIn, quality
-Normal Item, 7, 17
-Normal Item, -1, 1
-Normal Item, -3, 4
-Normal Item, -4, 4
-Aged Brie, 7, 23
-Aged Brie, -3, 36
-Aged Brie, 2, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 12, 23
-Backstage passes to a TAFKAL80ETC concert, 7, 26
-Backstage passes to a TAFKAL80ETC concert, 2, 29
-Backstage passes to a TAFKAL80ETC concert, -2, 0
-Backstage passes to a TAFKAL80ETC concert, -3, 0
-
--------- day 4 --------
-name, sellIn, quality
-Normal Item, 6, 16
-Normal Item, -2, 0
-Normal Item, -4, 2
-Normal Item, -5, 2
-Aged Brie, 6, 24
-Aged Brie, -4, 38
-Aged Brie, 1, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 11, 24
-Backstage passes to a TAFKAL80ETC concert, 6, 28
-Backstage passes to a TAFKAL80ETC concert, 1, 32
-Backstage passes to a TAFKAL80ETC concert, -3, 0
-Backstage passes to a TAFKAL80ETC concert, -4, 0
-
--------- day 5 --------
-name, sellIn, quality
-Normal Item, 5, 15
-Normal Item, -3, 0
-Normal Item, -5, 0
-Normal Item, -6, 0
-Aged Brie, 5, 25
-Aged Brie, -5, 40
-Aged Brie, 0, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 10, 25
-Backstage passes to a TAFKAL80ETC concert, 5, 30
-Backstage passes to a TAFKAL80ETC concert, 0, 35
-Backstage passes to a TAFKAL80ETC concert, -4, 0
-Backstage passes to a TAFKAL80ETC concert, -5, 0
-
--------- day 6 --------
-name, sellIn, quality
-Normal Item, 4, 14
-Normal Item, -4, 0
-Normal Item, -6, 0
-Normal Item, -7, 0
-Aged Brie, 4, 26
-Aged Brie, -6, 42
-Aged Brie, -1, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 9, 27
-Backstage passes to a TAFKAL80ETC concert, 4, 33
-Backstage passes to a TAFKAL80ETC concert, -1, 0
-Backstage passes to a TAFKAL80ETC concert, -5, 0
-Backstage passes to a TAFKAL80ETC concert, -6, 0
-
--------- day 7 --------
-name, sellIn, quality
-Normal Item, 3, 13
-Normal Item, -5, 0
-Normal Item, -7, 0
-Normal Item, -8, 0
-Aged Brie, 3, 27
-Aged Brie, -7, 44
-Aged Brie, -2, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 8, 29
-Backstage passes to a TAFKAL80ETC concert, 3, 36
-Backstage passes to a TAFKAL80ETC concert, -2, 0
-Backstage passes to a TAFKAL80ETC concert, -6, 0
-Backstage passes to a TAFKAL80ETC concert, -7, 0
-
--------- day 8 --------
-name, sellIn, quality
-Normal Item, 2, 12
-Normal Item, -6, 0
-Normal Item, -8, 0
-Normal Item, -9, 0
-Aged Brie, 2, 28
-Aged Brie, -8, 46
-Aged Brie, -3, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 7, 31
-Backstage passes to a TAFKAL80ETC concert, 2, 39
-Backstage passes to a TAFKAL80ETC concert, -3, 0
-Backstage passes to a TAFKAL80ETC concert, -7, 0
-Backstage passes to a TAFKAL80ETC concert, -8, 0
-
--------- day 9 --------
-name, sellIn, quality
-Normal Item, 1, 11
-Normal Item, -7, 0
-Normal Item, -9, 0
-Normal Item, -10, 0
-Aged Brie, 1, 29
-Aged Brie, -9, 48
-Aged Brie, -4, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 6, 33
-Backstage passes to a TAFKAL80ETC concert, 1, 42
-Backstage passes to a TAFKAL80ETC concert, -4, 0
-Backstage passes to a TAFKAL80ETC concert, -8, 0
-Backstage passes to a TAFKAL80ETC concert, -9, 0
-
--------- day 10 --------
-name, sellIn, quality
-Normal Item, 0, 10
-Normal Item, -8, 0
-Normal Item, -10, 0
-Normal Item, -11, 0
-Aged Brie, 0, 30
-Aged Brie, -10, 50
-Aged Brie, -5, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 5, 35
-Backstage passes to a TAFKAL80ETC concert, 0, 45
-Backstage passes to a TAFKAL80ETC concert, -5, 0
-Backstage passes to a TAFKAL80ETC concert, -9, 0
-Backstage passes to a TAFKAL80ETC concert, -10, 0
-
--------- day 11 --------
-name, sellIn, quality
-Normal Item, -1, 8
-Normal Item, -9, 0
-Normal Item, -11, 0
-Normal Item, -12, 0
-Aged Brie, -1, 32
-Aged Brie, -11, 50
-Aged Brie, -6, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 4, 38
-Backstage passes to a TAFKAL80ETC concert, -1, 0
-Backstage passes to a TAFKAL80ETC concert, -6, 0
-Backstage passes to a TAFKAL80ETC concert, -10, 0
-Backstage passes to a TAFKAL80ETC concert, -11, 0
-
--------- day 12 --------
-name, sellIn, quality
-Normal Item, -2, 6
-Normal Item, -10, 0
-Normal Item, -12, 0
-Normal Item, -13, 0
-Aged Brie, -2, 34
-Aged Brie, -12, 50
-Aged Brie, -7, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 3, 41
-Backstage passes to a TAFKAL80ETC concert, -2, 0
-Backstage passes to a TAFKAL80ETC concert, -7, 0
-Backstage passes to a TAFKAL80ETC concert, -11, 0
-Backstage passes to a TAFKAL80ETC concert, -12, 0
-
--------- day 13 --------
-name, sellIn, quality
-Normal Item, -3, 4
-Normal Item, -11, 0
-Normal Item, -13, 0
-Normal Item, -14, 0
-Aged Brie, -3, 36
-Aged Brie, -13, 50
-Aged Brie, -8, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 2, 44
-Backstage passes to a TAFKAL80ETC concert, -3, 0
-Backstage passes to a TAFKAL80ETC concert, -8, 0
-Backstage passes to a TAFKAL80ETC concert, -12, 0
-Backstage passes to a TAFKAL80ETC concert, -13, 0
-
--------- day 14 --------
-name, sellIn, quality
-Normal Item, -4, 2
-Normal Item, -12, 0
-Normal Item, -14, 0
-Normal Item, -15, 0
-Aged Brie, -4, 38
-Aged Brie, -14, 50
-Aged Brie, -9, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 1, 47
-Backstage passes to a TAFKAL80ETC concert, -4, 0
-Backstage passes to a TAFKAL80ETC concert, -9, 0
-Backstage passes to a TAFKAL80ETC concert, -13, 0
-Backstage passes to a TAFKAL80ETC concert, -14, 0
-
--------- day 15 --------
-name, sellIn, quality
-Normal Item, -5, 0
-Normal Item, -13, 0
-Normal Item, -15, 0
-Normal Item, -16, 0
-Aged Brie, -5, 40
-Aged Brie, -15, 50
-Aged Brie, -10, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, 0, 50
-Backstage passes to a TAFKAL80ETC concert, -5, 0
-Backstage passes to a TAFKAL80ETC concert, -10, 0
-Backstage passes to a TAFKAL80ETC concert, -14, 0
-Backstage passes to a TAFKAL80ETC concert, -15, 0
-
--------- day 16 --------
-name, sellIn, quality
-Normal Item, -6, 0
-Normal Item, -14, 0
-Normal Item, -16, 0
-Normal Item, -17, 0
-Aged Brie, -6, 42
-Aged Brie, -16, 50
-Aged Brie, -11, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -1, 0
-Backstage passes to a TAFKAL80ETC concert, -6, 0
-Backstage passes to a TAFKAL80ETC concert, -11, 0
-Backstage passes to a TAFKAL80ETC concert, -15, 0
-Backstage passes to a TAFKAL80ETC concert, -16, 0
-
--------- day 17 --------
-name, sellIn, quality
-Normal Item, -7, 0
-Normal Item, -15, 0
-Normal Item, -17, 0
-Normal Item, -18, 0
-Aged Brie, -7, 44
-Aged Brie, -17, 50
-Aged Brie, -12, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -2, 0
-Backstage passes to a TAFKAL80ETC concert, -7, 0
-Backstage passes to a TAFKAL80ETC concert, -12, 0
-Backstage passes to a TAFKAL80ETC concert, -16, 0
-Backstage passes to a TAFKAL80ETC concert, -17, 0
-
--------- day 18 --------
-name, sellIn, quality
-Normal Item, -8, 0
-Normal Item, -16, 0
-Normal Item, -18, 0
-Normal Item, -19, 0
-Aged Brie, -8, 46
-Aged Brie, -18, 50
-Aged Brie, -13, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -3, 0
-Backstage passes to a TAFKAL80ETC concert, -8, 0
-Backstage passes to a TAFKAL80ETC concert, -13, 0
-Backstage passes to a TAFKAL80ETC concert, -17, 0
-Backstage passes to a TAFKAL80ETC concert, -18, 0
-
--------- day 19 --------
-name, sellIn, quality
-Normal Item, -9, 0
-Normal Item, -17, 0
-Normal Item, -19, 0
-Normal Item, -20, 0
-Aged Brie, -9, 48
-Aged Brie, -19, 50
-Aged Brie, -14, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -4, 0
-Backstage passes to a TAFKAL80ETC concert, -9, 0
-Backstage passes to a TAFKAL80ETC concert, -14, 0
-Backstage passes to a TAFKAL80ETC concert, -18, 0
-Backstage passes to a TAFKAL80ETC concert, -19, 0
-
--------- day 20 --------
-name, sellIn, quality
-Normal Item, -10, 0
-Normal Item, -18, 0
-Normal Item, -20, 0
-Normal Item, -21, 0
-Aged Brie, -10, 50
-Aged Brie, -20, 50
-Aged Brie, -15, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -5, 0
-Backstage passes to a TAFKAL80ETC concert, -10, 0
-Backstage passes to a TAFKAL80ETC concert, -15, 0
-Backstage passes to a TAFKAL80ETC concert, -19, 0
-Backstage passes to a TAFKAL80ETC concert, -20, 0
-
--------- day 21 --------
-name, sellIn, quality
-Normal Item, -11, 0
-Normal Item, -19, 0
-Normal Item, -21, 0
-Normal Item, -22, 0
-Aged Brie, -11, 50
-Aged Brie, -21, 50
-Aged Brie, -16, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -6, 0
-Backstage passes to a TAFKAL80ETC concert, -11, 0
-Backstage passes to a TAFKAL80ETC concert, -16, 0
-Backstage passes to a TAFKAL80ETC concert, -20, 0
-Backstage passes to a TAFKAL80ETC concert, -21, 0
-
--------- day 22 --------
-name, sellIn, quality
-Normal Item, -12, 0
-Normal Item, -20, 0
-Normal Item, -22, 0
-Normal Item, -23, 0
-Aged Brie, -12, 50
-Aged Brie, -22, 50
-Aged Brie, -17, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -7, 0
-Backstage passes to a TAFKAL80ETC concert, -12, 0
-Backstage passes to a TAFKAL80ETC concert, -17, 0
-Backstage passes to a TAFKAL80ETC concert, -21, 0
-Backstage passes to a TAFKAL80ETC concert, -22, 0
-
--------- day 23 --------
-name, sellIn, quality
-Normal Item, -13, 0
-Normal Item, -21, 0
-Normal Item, -23, 0
-Normal Item, -24, 0
-Aged Brie, -13, 50
-Aged Brie, -23, 50
-Aged Brie, -18, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -8, 0
-Backstage passes to a TAFKAL80ETC concert, -13, 0
-Backstage passes to a TAFKAL80ETC concert, -18, 0
-Backstage passes to a TAFKAL80ETC concert, -22, 0
-Backstage passes to a TAFKAL80ETC concert, -23, 0
-
--------- day 24 --------
-name, sellIn, quality
-Normal Item, -14, 0
-Normal Item, -22, 0
-Normal Item, -24, 0
-Normal Item, -25, 0
-Aged Brie, -14, 50
-Aged Brie, -24, 50
-Aged Brie, -19, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -9, 0
-Backstage passes to a TAFKAL80ETC concert, -14, 0
-Backstage passes to a TAFKAL80ETC concert, -19, 0
-Backstage passes to a TAFKAL80ETC concert, -23, 0
-Backstage passes to a TAFKAL80ETC concert, -24, 0
-
--------- day 25 --------
-name, sellIn, quality
-Normal Item, -15, 0
-Normal Item, -23, 0
-Normal Item, -25, 0
-Normal Item, -26, 0
-Aged Brie, -15, 50
-Aged Brie, -25, 50
-Aged Brie, -20, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -10, 0
-Backstage passes to a TAFKAL80ETC concert, -15, 0
-Backstage passes to a TAFKAL80ETC concert, -20, 0
-Backstage passes to a TAFKAL80ETC concert, -24, 0
-Backstage passes to a TAFKAL80ETC concert, -25, 0
-
--------- day 26 --------
-name, sellIn, quality
-Normal Item, -16, 0
-Normal Item, -24, 0
-Normal Item, -26, 0
-Normal Item, -27, 0
-Aged Brie, -16, 50
-Aged Brie, -26, 50
-Aged Brie, -21, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -11, 0
-Backstage passes to a TAFKAL80ETC concert, -16, 0
-Backstage passes to a TAFKAL80ETC concert, -21, 0
-Backstage passes to a TAFKAL80ETC concert, -25, 0
-Backstage passes to a TAFKAL80ETC concert, -26, 0
-
--------- day 27 --------
-name, sellIn, quality
-Normal Item, -17, 0
-Normal Item, -25, 0
-Normal Item, -27, 0
-Normal Item, -28, 0
-Aged Brie, -17, 50
-Aged Brie, -27, 50
-Aged Brie, -22, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -12, 0
-Backstage passes to a TAFKAL80ETC concert, -17, 0
-Backstage passes to a TAFKAL80ETC concert, -22, 0
-Backstage passes to a TAFKAL80ETC concert, -26, 0
-Backstage passes to a TAFKAL80ETC concert, -27, 0
-
--------- day 28 --------
-name, sellIn, quality
-Normal Item, -18, 0
-Normal Item, -26, 0
-Normal Item, -28, 0
-Normal Item, -29, 0
-Aged Brie, -18, 50
-Aged Brie, -28, 50
-Aged Brie, -23, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -13, 0
-Backstage passes to a TAFKAL80ETC concert, -18, 0
-Backstage passes to a TAFKAL80ETC concert, -23, 0
-Backstage passes to a TAFKAL80ETC concert, -27, 0
-Backstage passes to a TAFKAL80ETC concert, -28, 0
-
--------- day 29 --------
-name, sellIn, quality
-Normal Item, -19, 0
-Normal Item, -27, 0
-Normal Item, -29, 0
-Normal Item, -30, 0
-Aged Brie, -19, 50
-Aged Brie, -29, 50
-Aged Brie, -24, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -14, 0
-Backstage passes to a TAFKAL80ETC concert, -19, 0
-Backstage passes to a TAFKAL80ETC concert, -24, 0
-Backstage passes to a TAFKAL80ETC concert, -28, 0
-Backstage passes to a TAFKAL80ETC concert, -29, 0
-
--------- day 30 --------
-name, sellIn, quality
-Normal Item, -20, 0
-Normal Item, -28, 0
-Normal Item, -30, 0
-Normal Item, -31, 0
-Aged Brie, -20, 50
-Aged Brie, -30, 50
-Aged Brie, -25, 50
-Sulfuras, Hand of Ragnaros, 10, 80
-Sulfuras, Hand of Ragnaros, -1, 80
-Backstage passes to a TAFKAL80ETC concert, -15, 0
-Backstage passes to a TAFKAL80ETC concert, -20, 0
-Backstage passes to a TAFKAL80ETC concert, -25, 0
-Backstage passes to a TAFKAL80ETC concert, -29, 0
-Backstage passes to a TAFKAL80ETC concert, -30, 0
-
-''';
-}
diff --git a/test/mars_rover_test.dart b/test/mars_rover_test.dart
deleted file mode 100644
index 53e4540..0000000
--- a/test/mars_rover_test.dart
+++ /dev/null
@@ -1,194 +0,0 @@
-import 'package:tdd_katas/mars_rover.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('Mars Rover:', () {
-    test('rover reports initial position and direction', () {
-      final rover = Rover(x: 0, y: 0, direction: 'N');
-
-      expect(rover.x, equals(0));
-      expect(rover.y, equals(0));
-      expect(rover.direction, equals('N'));
-    });
-
-    group('Turning Left:', () {
-      test('from North faces West', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.turnLeft();
-        expect(rover.direction, equals('W'));
-      });
-
-      test('from West faces South', () {
-        final rover = Rover(x: 0, y: 0, direction: 'W');
-        rover.turnLeft();
-        expect(rover.direction, equals('S'));
-      });
-
-      test('from South faces East', () {
-        final rover = Rover(x: 0, y: 0, direction: 'S');
-        rover.turnLeft();
-        expect(rover.direction, equals('E'));
-      });
-
-      test('from East faces North', () {
-        final rover = Rover(x: 0, y: 0, direction: 'E');
-        rover.turnLeft();
-        expect(rover.direction, equals('N'));
-      });
-    });
-
-    group('Turning Right:', () {
-      test('from North faces East', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.turnRight();
-        expect(rover.direction, equals('E'));
-      });
-
-      test('from East faces South', () {
-        final rover = Rover(x: 0, y: 0, direction: 'E');
-        rover.turnRight();
-        expect(rover.direction, equals('S'));
-      });
-
-      test('from South faces West', () {
-        final rover = Rover(x: 0, y: 0, direction: 'S');
-        rover.turnRight();
-        expect(rover.direction, equals('W'));
-      });
-
-      test('from West faces North', () {
-        final rover = Rover(x: 0, y: 0, direction: 'W');
-        rover.turnRight();
-        expect(rover.direction, equals('N'));
-      });
-    });
-
-    group('Moving Forward:', () {
-      test('facing North increases Y', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.moveForward();
-        expect(rover.x, equals(0));
-        expect(rover.y, equals(1));
-      });
-
-      test('facing East increases X', () {
-        final rover = Rover(x: 0, y: 0, direction: 'E');
-        rover.moveForward();
-        expect(rover.x, equals(1));
-        expect(rover.y, equals(0));
-      });
-
-      test('facing South decreases Y', () {
-        final rover = Rover(x: 0, y: 5, direction: 'S');
-        rover.moveForward();
-        expect(rover.x, equals(0));
-        expect(rover.y, equals(4));
-      });
-
-      test('facing West decreases X', () {
-        final rover = Rover(x: 5, y: 0, direction: 'W');
-        rover.moveForward();
-        expect(rover.x, equals(4));
-        expect(rover.y, equals(0));
-      });
-    });
-
-    group('Executing Command Sequences:', () {
-      test('single command L', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.execute('L');
-        expect(rover.direction, equals('W'));
-      });
-
-      test('single command R', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.execute('R');
-        expect(rover.direction, equals('E'));
-      });
-
-      test('single command M', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.execute('M');
-        expect(rover.y, equals(1));
-      });
-
-      test('complex sequence MMRMMLM', () {
-        final rover = Rover(x: 0, y: 0, direction: 'N');
-        rover.execute('MMRMMLM');
-        expect(rover.x, equals(2));
-        expect(rover.y, equals(3));
-        expect(rover.direction, equals('N'));
-      });
-
-      test('example from Mars Rover kata', () {
-        final rover = Rover(x: 1, y: 2, direction: 'N');
-        rover.execute('LMLMLMLMM');
-        expect(rover.x, equals(1));
-        expect(rover.y, equals(3));
-        expect(rover.direction, equals('N'));
-      });
-    });
-
-    group('Plateau Boundaries:', () {
-      test('wraps around when moving North past boundary', () {
-        final rover = Rover(
-          x: 0,
-          y: 5,
-          direction: 'N',
-          plateauWidth: 5,
-          plateauHeight: 5,
-        );
-        rover.moveForward();
-        expect(rover.y, equals(0));
-      });
-
-      test('wraps around when moving East past boundary', () {
-        final rover = Rover(
-          x: 5,
-          y: 0,
-          direction: 'E',
-          plateauWidth: 5,
-          plateauHeight: 5,
-        );
-        rover.moveForward();
-        expect(rover.x, equals(0));
-      });
-
-      test('wraps around when moving South past boundary', () {
-        final rover = Rover(
-          x: 0,
-          y: 0,
-          direction: 'S',
-          plateauWidth: 5,
-          plateauHeight: 5,
-        );
-        rover.moveForward();
-        expect(rover.y, equals(5));
-      });
-
-      test('wraps around when moving West past boundary', () {
-        final rover = Rover(
-          x: 0,
-          y: 0,
-          direction: 'W',
-          plateauWidth: 5,
-          plateauHeight: 5,
-        );
-        rover.moveForward();
-        expect(rover.x, equals(5));
-      });
-
-      test('example with wrapping', () {
-        final rover = Rover(
-          x: 5,
-          y: 5,
-          direction: 'N',
-          plateauWidth: 5,
-          plateauHeight: 5,
-        );
-        rover.execute('MMM');
-        expect(rover.y, equals(2));
-      });
-    });
-  });
-}
diff --git a/test/string_calculator_test.dart b/test/string_calculator_test.dart
deleted file mode 100644
index 1d4ee44..0000000
--- a/test/string_calculator_test.dart
+++ /dev/null
@@ -1,41 +0,0 @@
-import 'package:tdd_katas/string_calculator.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('String Calculator - Bug Hunt', () {
-    late StringCalculator calculator;
-
-    setUp(() {
-      calculator = StringCalculator();
-    });
-
-    test('empty string returns 0', () {
-      expect(calculator.add(''), equals(0));
-    });
-
-    test('single number returns that number', () {
-      expect(calculator.add('5'), equals(5));
-      expect(calculator.add('42'), equals(42));
-    });
-
-    test('two comma-delimited numbers return sum', () {
-      expect(calculator.add('1,2'), equals(3));
-      expect(calculator.add('10,20'), equals(30));
-    });
-
-    test('multiple comma-delimited numbers return sum', () {
-      expect(calculator.add('1,2,3'), equals(6));
-      expect(calculator.add('5,10,15,20'), equals(50));
-    });
-
-    test('custom delimiter works correctly', () {
-      expect(calculator.add('//;\n1;2'), equals(3));
-      expect(calculator.add('//|\n10|20|30'), equals(60));
-    });
-
-    test('numbers greater than 1000 are ignored', () {
-      expect(calculator.add('2,1001'), equals(2));
-      expect(calculator.add('1000,1001,2'), equals(1002));
-    });
-  });
-}