fix tests

Author: mohammedahmed18

codeflash/languages/javascript/test_runner.py

@@ -336,10 +336,9 @@ def _create_codeflash_jest_config(
 def _get_jest_config_for_project(project_root: Path) -> Path | None:
     """Get the appropriate Jest config for the project.
 
-    Creates a codeflash-compatible Jest config that handles:
-    - ESM packages in node_modules that need transformation
-    - TypeScript files with proper ts-jest configuration
-    - bundler moduleResolution compatibility
+    If the project uses bundler moduleResolution, creates and returns a
+    codeflash-compatible Jest config. Otherwise, returns the project's
+    existing Jest config.
 
     Args:
         project_root: Root of the project.
@@ -356,12 +355,10 @@ def _get_jest_config_for_project(project_root: Path) -> Path | None:
         logger.info("Detected bundler moduleResolution - creating compatible config")
         # Create codeflash-compatible tsconfig
         _create_codeflash_tsconfig(project_root)
-
-    # Always create a codeflash Jest config to handle ESM packages properly
-    # Many modern NPM packages are ESM-only and need transformation
-    codeflash_jest_config = _create_codeflash_jest_config(project_root, original_jest_config, for_esm=True)
-    if codeflash_jest_config:
-        return codeflash_jest_config
+        # Create codeflash Jest config that uses it
+        codeflash_jest_config = _create_codeflash_jest_config(project_root, original_jest_config)
+        if codeflash_jest_config:
+            return codeflash_jest_config
 
     return original_jest_config
 

tests/test_languages/fixtures/js_cjs/calculator.js

@@ -6,7 +6,7 @@
 const { add, multiply, factorial } = require('./math_utils');
 const { formatNumber, validateInput } = require('./helpers/format');
 
-export class Calculator {
+class Calculator {
     constructor(precision = 2) {
         this.precision = precision;
         this.history = [];

tests/test_languages/test_javascript_test_runner.py

@@ -668,10 +668,10 @@ def test_create_codeflash_jest_config(self):
             assert result_path.exists()
             assert result_path.name == "jest.codeflash.config.js"
 
-            # Verify it contains the tsconfig reference
+            # Verify it contains ESM package transformation patterns
             content = result_path.read_text()
-            assert "tsconfig.codeflash.json" in content
-            assert "ts-jest" in content
+            assert "transformIgnorePatterns" in content
+            assert "node_modules" in content
 
     def test_get_jest_config_for_project_with_bundler(self):
         """Test that bundler projects get codeflash Jest config."""