Merge pull request #7 from iambumblehead/throw-error-if-mocked-path-n…

…ot-found

throw error if mocked module path not found

README.md

@@ -48,6 +48,8 @@ test('should do global instance mocks —third parameter', async t => {
 
 ### changelog
 
+ * 0.3.6 _Apr.19.2021_
+   * throw error if mocked module path is not found
  * 0.3.5 _Apr.18.2021_
    * added gitlab actions npm test: node 12.x, 14.x and 15.x
  * 0.3.3 _Apr.13.2021_

package.json

@@ -1,6 +1,6 @@
 {
   "name": "esmock",
-  "version": "0.3.5",
+  "version": "0.3.6",
   "license": "MIT",
   "readmeFilename": "README.md",
   "description": "mock esm modules for unit-tests",

spec/esmock.spec.js

@@ -24,6 +24,17 @@ test('should mock a local file', async t => {
   t.is(main(), 'main string, test string');
 });
 
+test('should throw error if local file not found', async t => {
+  await t.throwsAsync(() => esmock('./local/not/found.js', {
+    './local/mainUtil.js' : {
+      createString : () => 'test string'
+    }
+  }), {
+    message : 'modulePath not found: "./local/not/found.js"'
+  });
+});
+
+
 test('should mock a module', async t => {
   const main = await esmock('./local/mainUtil.js', {
     'form-urlencoded' : () => 'mock encode'

src/esmockModule.js

@@ -145,6 +145,10 @@ const esmockModuleMock = async (calleePath, modulePath, defs, gdefs, opt) => {
   const esmockGlobalKeys = await esmockModulesCreate(
     calleePath, pathModuleFull, esmockKey, gdefs, Object.keys(gdefs));
 
+  if (pathModuleFull === null) {
+    throw new Error(`modulePath not found: "${modulePath}"`);
+  }
+
   const esmockCacheKey = `file://${pathModuleFull}?`
     + 'key=:esmockKey?esmockGlobals=:esmockGlobals#esmockModuleKeys=:moduleKeys'
       .replace(/:esmockKey/, esmockKey)