fix: make LWC unit tests pass on a clean checkout (resolve c/* imports, correct mobileCapabilities mock)

PackageComponents/lwc/lscMobileInline_SimpleWidget/__tests__/lscMobileInline_SimpleWidget.test.js

@@ -1,11 +1,14 @@
 import { createElement } from '@lwc/engine-dom';
 import LscMobileInline_SimpleWidget from 'c/lscMobileInline_SimpleWidget';
 
-// Mock the lightning/barcodeScanner module
-jest.mock('lightning/barcodeScanner', () => {
+// Mock the lightning/mobileCapabilities module (the component imports getBarcodeScanner from it)
+jest.mock('lightning/mobileCapabilities', () => {
     return {
-        scan: jest.fn().mockImplementation(() => Promise.resolve({ value: '12345' })),
-        BarcodeScanner: jest.fn()
+        getBarcodeScanner: jest.fn().mockImplementation(() => ({
+            isAvailable: jest.fn().mockReturnValue(false),
+            beginCapture: jest.fn().mockImplementation(() => Promise.resolve({ value: '12345' })),
+            endCapture: jest.fn()
+        }))
     };
 }, { virtual: true });
 

jest.config.js

@@ -2,5 +2,11 @@ const { jestConfig } = require('@salesforce/sfdx-lwc-jest/config');
 
 module.exports = {
     ...jestConfig,
-    modulePathIgnorePatterns: ['<rootDir>/.localdevserver']
+    modulePathIgnorePatterns: ['<rootDir>/.localdevserver'],
+    // Components live under PackageComponents/lwc, which is not a sfdx-project.json
+    // packageDirectory, so the default resolver can't map `c/*` imports to them.
+    moduleNameMapper: {
+        ...(jestConfig.moduleNameMapper || {}),
+        '^c/(.+)$': '<rootDir>/PackageComponents/lwc/$1/$1'
+    }
 };