@swc/jest - npm Package Compare versions

Comparing version 0.2.3 to 0.2.4

index.js

@@ -34,20 +34,41 @@ "use strict";
 var path = __importStar(require("path"));
+var vm = __importStar(require("vm"));
 var core_1 = require("@swc/core");
-var transformOpts;
-function getJestTransformConfig(jestConfig) {
+var packagePath = path.join(process.cwd(), 'package.json');
+var packageConfig = JSON.parse(fs.readFileSync(packagePath, 'utf-8'));
+var isEsmProject = packageConfig.type === 'module';
+// Jest use the `vm` [Module API](https://nodejs.org/api/vm.html#vm_class_vm_module) for ESM.
+// see https://github.com/facebook/jest/issues/9430
+var isSupportEsm = 'Module' in vm;
+var swcTransformOpts;
+function buildSwcTransformOpts(jestOptions) {
+    var swcOptions = getSwcTransformConfig(jestOptions);
+    if (!swcOptions) {
+        var swcrc = path.join(process.cwd(), '.swcrc');
+        swcOptions = fs.existsSync(swcrc) ? JSON.parse(fs.readFileSync(swcrc, 'utf-8')) : {};
+    }
+    if (!isSupportEsm) {
+        set(swcOptions, 'module.type', 'commonjs');
+    }
+    set(swcOptions, 'jsc.transform.hidden.jest', true);
+    return swcOptions;
+}
+function getSwcTransformConfig(jestConfig) {
     var _a;
-    if ("transformerConfig" in jestConfig) {
+    return ((_a = getJestConfig(jestConfig).transform.find(function (_a) {
+        var transformerPath = _a[1];
+        return transformerPath === __filename;
+    })) === null || _a === void 0 ? void 0 : _a[2]);
+}
+function getJestConfig(jestConfig) {
+    return 'config' in jestConfig
         // jest 27
-        return jestConfig.transformerConfig;
-    }
-    if ("transform" in jestConfig) {
+        ? jestConfig.config
         // jest 26
-        return ((_a = jestConfig.transform.find(function (_a) {
-            var transformerPath = _a[1];
-            return transformerPath === __filename;
-        })) === null || _a === void 0 ? void 0 : _a[2]);
-    }
+        : jestConfig;
 }
-function isEmptyTransformOptions(options) {
-    return !(options && Object.keys(options).length);
+function isEsm(filename, jestOptions) {
+    var _a;
+    return (/\.jsx?$/.test(filename) && isEsmProject) ||
+        ((_a = getJestConfig(jestOptions).extensionsToTreatAsEsm) === null || _a === void 0 ? void 0 : _a.find(function (ext) { return filename.endsWith(ext); }));
 }
@@ -67,17 +88,14 @@ function set(obj, path, value) {
 module.exports = {
-    process: function (src, filename, jestConfig) {
-        if (/\.(t|j)sx?$/.test(filename)) {
-            if (isEmptyTransformOptions(transformOpts)) {
-                var swcOptions = getJestTransformConfig(jestConfig);
-                if (!swcOptions) {
-                    var swcrc = path.join(process.cwd(), '.swcrc');
-                    swcOptions = fs.existsSync(swcrc) ? JSON.parse(fs.readFileSync(swcrc, 'utf-8')) : {};
-                }
-                set(swcOptions, 'jsc.transform.hidden.jest', true);
-                transformOpts = swcOptions;
-            }
-            return core_1.transformSync(src, __assign(__assign({}, transformOpts), { filename: filename }));
+    process: function (src, filename, jestOptions) {
+        if (!/\.[jt]sx?$/.test(filename)) {
+            return src;
         }
-        return src;
+        if (!swcTransformOpts) {
+            swcTransformOpts = buildSwcTransformOpts(jestOptions);
+        }
+        if (isSupportEsm) {
+            set(swcTransformOpts, 'module.type', isEsm(filename, jestOptions) ? 'es6' : 'commonjs');
+        }
+        return core_1.transformSync(src, __assign(__assign({}, swcTransformOpts), { filename: filename }));
     },
 };

package.json

 {
   "name": "@swc/jest",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "swc integration for jest",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -11,3 +11,3 @@ # @swc/jest
 # if you use yarn
-yarn add jest @swc/core @swc/jest
+yarn add -D jest @swc/core @swc/jest
 ```
@@ -19,3 +19,3 @@
 
-```
+```js
 module.exports = {
@@ -30,6 +30,10 @@ transform: {
 
-```
+```js
+const fs = require('fs')
+
+const config = JSON.parse(fs.readFileSync(`${__dirname}/.swcrc`, 'utf-8'))
+
 module.exports = {
   transform: {
-    '^.+\\.(t|j)sx?$': ['@swc/jest', {/* you swc configuration */}],
+    '^.+\\.(t|j)sx?$': ['@swc/jest', { ...config, /* custom configuration in jest */ }],
   },
@@ -39,2 +43,35 @@ }
 
+## Q & A
+
+**Q: Jest use CommonJS in default. But I want to use ESM.**
+
+A: Setup Jest following this [Guide](https://jestjs.io/docs/ecmascript-modules).
+
+  For JavaScript, it need to configure `package.json`:
+  
+  ```json
+  {
+    // ...
+    "type": "module"
+  }
+  ```
+
+  For TypeScript, it need some configuration in `jest.config.js`:
+
+  ```js
+  module.exports = {
+    // ...
+    extensionsToTreatAsEsm: ['.ts', '.tsx'],
+  }
+  ```
+
+  Run test with `--experimental-vm-modules`:
+
+  ```sh
+  cross-env NODE_OPTIONS=--experimental-vm-modules jest
+
+  # or
+  node --experimental-vm-modules ./node_modules/jest/bin/jest.js
+  ```
+
 ## License
@@ -41,0 +78,0 @@

New alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Debug access

Supply chain risk

Uses debug, reflection and dynamic code execution features.

Found 1 instance in 1 package

Fixed alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

6817

increased by28.96%

Lines of code

99

increased by22.22%

Number of lines in readme file

78

increased by90.24%

Worsened metrics

Number of low supply chain risk alerts

3

increased by50%

No dependency changes