Add GitHub Actions CI workflow

- Build and test on push/PR to master/main
- Run cargo tests
- Run all stdlib tests with both JavaScript and Python targets
- Fix test runner to work with files that have no tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: MagicalTux

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Rust
+        uses: dtolnay/rust-action@stable
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Run cargo tests
+        run: cargo test
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Run stdlib tests (JavaScript)
+        run: |
+          echo "Running stdlib tests with JavaScript target..."
+          for file in stdlib/**/*.algoc; do
+            echo "Testing: $file"
+            cargo run --release -- test "$file" --target js
+          done
+
+      - name: Run stdlib tests (Python)
+        run: |
+          echo "Running stdlib tests with Python target..."
+          for file in stdlib/**/*.algoc; do
+            echo "Testing: $file"
+            cargo run --release -- test "$file" --target python
+          done

src/codegen/javascript.rs

@@ -1877,7 +1877,7 @@ impl CodeGenerator for JavaScriptGenerator {
             .collect();
 
         // Generate test runner if tests are included
-        if self.include_tests && !test_names.is_empty() {
+        if self.include_tests {
             self.writeln("// Test Runner");
             self.writeln("function run_tests() {");
             self.indent();
@@ -1947,7 +1947,7 @@ impl CodeGenerator for JavaScriptGenerator {
                 first = false;
             }
         }
-        if self.include_tests && !test_names.is_empty() {
+        if self.include_tests {
             if !first {
                 self.write(", ");
             }
@@ -1958,7 +1958,7 @@ impl CodeGenerator for JavaScriptGenerator {
         self.writeln("}");
 
         // Auto-run tests if this is the main module
-        if self.include_tests && !test_names.is_empty() {
+        if self.include_tests {
             self.writeln("");
             self.writeln("// Auto-run tests if executed directly");
             self.writeln("if (typeof require !== 'undefined' && require.main === module) {");

src/codegen/python.rs

@@ -1458,7 +1458,7 @@ impl CodeGenerator for PythonGenerator {
             .collect();
 
         // Generate test runner if tests are included
-        if self.include_tests && !test_names.is_empty() {
+        if self.include_tests {
             self.writeln("# Test Runner");
             self.writeln("def run_tests():");
             self.indent();
@@ -1502,7 +1502,7 @@ impl CodeGenerator for PythonGenerator {
         // Main block
         self.writeln("if __name__ == '__main__':");
         self.indent();
-        if self.include_tests && !test_names.is_empty() {
+        if self.include_tests {
             self.writeln("import sys");
             self.writeln("sys.exit(0 if run_tests() else 1)");
         } else {