refactor: use python instead of javascript

module-09-reset-vs-revert/setup.ps1

@@ -28,21 +28,16 @@ git config user.email "user@workshop.local" | Out-Null
 
 # Create initial commits on main
 $app = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  subtract(a, b) {
-    return a - b;
-  }
-}
-
-module.exports = Calculator;
+    def subtract(self, a, b):
+        return a - b
 "@
 
-Set-Content -Path "calculator.js" -Value $app
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $app
+git add calculator.py
 git commit -m "Initial calculator implementation" | Out-Null
 
 $readme = @"
@@ -59,54 +54,41 @@ git commit -m "Add README" | Out-Null
 git checkout -b local-feature | Out-Null
 
 $appWithMultiply = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  subtract(a, b) {
-    return a - b;
-  }
+    def subtract(self, a, b):
+        return a - b
 
-  multiply(a, b) {
-    return a * b;
-  }
-}
-
-module.exports = Calculator;
+    def multiply(self, a, b):
+        return a * b
 "@
 
-Set-Content -Path "calculator.js" -Value $appWithMultiply
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $appWithMultiply
+git add calculator.py
 git commit -m "Add multiply function" | Out-Null
 
 # Add a bad commit that should be removed with reset
 $appWithBadCode = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  subtract(a, b) {
-    return a - b;
-  }
+    def subtract(self, a, b):
+        return a - b
 
-  multiply(a, b) {
-    return a * b;
-  }
+    def multiply(self, a, b):
+        return a * b
 
-  // BUG: This is broken and should never have been committed!
-  divide(a, b) {
-    // Forgot to check for division by zero
-    return a / b;  // This will return Infinity or NaN for zero!
-  }
-}
-
-module.exports = Calculator;
+    # BUG: This is broken and should never have been committed!
+    def divide(self, a, b):
+        # Forgot to check for division by zero
+        return a / b  # This will raise ZeroDivisionError for zero!
 "@
 
-Set-Content -Path "calculator.js" -Value $appWithBadCode
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $appWithBadCode
+git add calculator.py
 git commit -m "Add broken divide function - DO NOT KEEP" | Out-Null
 
 # Switch back to main for shared-feature branch
@@ -116,87 +98,70 @@ git checkout main | Out-Null
 git checkout -b shared-feature | Out-Null
 
 $appWithPower = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  subtract(a, b) {
-    return a - b;
-  }
+    def subtract(self, a, b):
+        return a - b
 
-  power(a, b) {
-    return Math.pow(a, b);
-  }
-}
-
-module.exports = Calculator;
+    def power(self, a, b):
+        return a ** b
 "@
 
-Set-Content -Path "calculator.js" -Value $appWithPower
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $appWithPower
+git add calculator.py
 git commit -m "Add power function" | Out-Null
 
 # Add a bad commit that should be reverted (not reset)
 $appWithBrokenFeature = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+import math
 
-  subtract(a, b) {
-    return a - b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  power(a, b) {
-    return Math.pow(a, b);
-  }
+    def subtract(self, a, b):
+        return a - b
 
-  // BUG: This breaks the calculator!
-  squareRoot(a) {
-    // This implementation is wrong for negative numbers
-    return Math.sqrt(a);  // Returns NaN for negative numbers without warning!
-  }
-}
+    def power(self, a, b):
+        return a ** b
 
-module.exports = Calculator;
+    # BUG: This breaks the calculator!
+    def square_root(self, a):
+        # This implementation is wrong for negative numbers
+        return math.sqrt(a)  # Raises ValueError for negative numbers without warning!
 "@
 
-Set-Content -Path "calculator.js" -Value $appWithBrokenFeature
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $appWithBrokenFeature
+git add calculator.py
 git commit -m "Add broken feature" | Out-Null
 
 # Add another good commit after the bad one (to show that revert preserves subsequent commits)
 $appWithMoreFeatures = @"
-class Calculator {
-  add(a, b) {
-    return a + b;
-  }
+import math
 
-  subtract(a, b) {
-    return a - b;
-  }
+class Calculator:
+    def add(self, a, b):
+        return a + b
 
-  power(a, b) {
-    return Math.pow(a, b);
-  }
+    def subtract(self, a, b):
+        return a - b
 
-  // BUG: This breaks the calculator!
-  squareRoot(a) {
-    // This implementation is wrong for negative numbers
-    return Math.sqrt(a);  // Returns NaN for negative numbers without warning!
-  }
+    def power(self, a, b):
+        return a ** b
 
-  modulo(a, b) {
-    return a % b;
-  }
-}
+    # BUG: This breaks the calculator!
+    def square_root(self, a):
+        # This implementation is wrong for negative numbers
+        return math.sqrt(a)  # Raises ValueError for negative numbers without warning!
 
-module.exports = Calculator;
+    def modulo(self, a, b):
+        return a % b
 "@
 
-Set-Content -Path "calculator.js" -Value $appWithMoreFeatures
-git add calculator.js
+Set-Content -Path "calculator.py" -Value $appWithMoreFeatures
+git add calculator.py
 git commit -m "Add modulo function" | Out-Null
 
 # Switch to local-feature for the challenge start

module-09-reset-vs-revert/verify.ps1

@@ -49,26 +49,26 @@ if ($localCommitCount -ne 3) {
     exit 1
 }
 
-# Check that calculator.js exists
-if (-not (Test-Path "calculator.js")) {
-    Write-Host "[FAIL] calculator.js not found." -ForegroundColor Red
+# Check that calculator.py exists
+if (-not (Test-Path "calculator.py")) {
+    Write-Host "[FAIL] calculator.py not found." -ForegroundColor Red
     Set-Location ..
     exit 1
 }
 
-# Check calculator.js on local-feature
-$localCalcContent = Get-Content "calculator.js" -Raw
+# Check calculator.py on local-feature
+$localCalcContent = Get-Content "calculator.py" -Raw
 
 # Should have multiply function
 if ($localCalcContent -notmatch "multiply") {
-    Write-Host "[FAIL] calculator.js should have the multiply function." -ForegroundColor Red
+    Write-Host "[FAIL] calculator.py should have the multiply function." -ForegroundColor Red
     Set-Location ..
     exit 1
 }
 
 # Should NOT have divide function (it was in the bad commit that should be reset)
 if ($localCalcContent -match "divide") {
-    Write-Host "[FAIL] calculator.js should NOT have the divide function." -ForegroundColor Red
+    Write-Host "[FAIL] calculator.py should NOT have the divide function." -ForegroundColor Red
     Write-Host "Hint: Use 'git reset --hard HEAD~1' to remove the bad commit" -ForegroundColor Yellow
     Set-Location ..
     exit 1
@@ -115,27 +115,27 @@ if ($sharedCommits -notmatch "Revert") {
     exit 1
 }
 
-# Check calculator.js on shared-feature
-$sharedCalcContent = Get-Content "calculator.js" -Raw
+# Check calculator.py on shared-feature
+$sharedCalcContent = Get-Content "calculator.py" -Raw
 
 # Should have power function
 if ($sharedCalcContent -notmatch "power") {
-    Write-Host "[FAIL] calculator.js should have the power function." -ForegroundColor Red
+    Write-Host "[FAIL] calculator.py should have the power function." -ForegroundColor Red
     Set-Location ..
     exit 1
 }
 
 # Should have modulo function (commits after the reverted one should be preserved)
 if ($sharedCalcContent -notmatch "modulo") {
-    Write-Host "[FAIL] calculator.js should have the modulo function." -ForegroundColor Red
+    Write-Host "[FAIL] calculator.py should have the modulo function." -ForegroundColor Red
     Write-Host "Hint: Reverting should preserve commits made after the bad one" -ForegroundColor Yellow
     Set-Location ..
     exit 1
 }
 
-# Should NOT have squareRoot function (it was in the bad commit that should be reverted)
-if ($sharedCalcContent -match "squareRoot") {
-    Write-Host "[FAIL] calculator.js should NOT have the squareRoot function." -ForegroundColor Red
+# Should NOT have square_root function (it was in the bad commit that should be reverted)
+if ($sharedCalcContent -match "square_root") {
+    Write-Host "[FAIL] calculator.py should NOT have the square_root function." -ForegroundColor Red
     Write-Host "Hint: The 'Add broken feature' commit should be reverted" -ForegroundColor Yellow
     Write-Host "      Use: git revert <commit-hash-of-broken-feature>" -ForegroundColor Yellow
     Set-Location ..
@@ -146,7 +146,7 @@ if ($sharedCalcContent -match "squareRoot") {
 $revertCommitMessage = git log --grep="Revert" --pretty=format:"%s" -n 1 2>$null
 if ($revertCommitMessage -notmatch "broken feature") {
     Write-Host "[FAIL] The revert commit should mention 'broken feature'." -ForegroundColor Red
-    Write-Host "Hint: Make sure you reverted the correct commit (the one that added squareRoot)" -ForegroundColor Yellow
+    Write-Host "Hint: Make sure you reverted the correct commit (the one that added square_root)" -ForegroundColor Yellow
     Set-Location ..
     exit 1
 }