Update moduleNameMapper jest config and remove extra deps

vercel · May 9, 2022 · aa933a7 · aa933a7
1 parent db8f161
commit aa933a7
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Showing 2 changed files with 5 additions and 8 deletions.
diff --git a/examples/with-jest/package.json b/examples/with-jest/package.json
@@ -18,10 +18,6 @@
     "@testing-library/react": "12.1.2",
     "@testing-library/user-event": "13.5.0",
     "@types/react": "17.0.38",
-    "babel-jest": "27.4.5",
-    "eslint": "8.5.0",
-    "eslint-config-next": "latest",
-    "eslint-plugin-testing-library": "5.0.1",
     "jest": "27.4.5",
     "typescript": "4.5.4"
   }

diff --git a/packages/next/build/jest/jest.ts b/packages/next/build/jest/jest.ts
@@ -76,10 +76,6 @@ export default function nextJest(options: { dir?: string } = {}) {
         ...resolvedJestConfig,
 
         moduleNameMapper: {
-          // Custom config will be able to override the default mappings
-          // moduleNameMapper is matched top to bottom hence why this has to be before Next.js internal rules
-          ...(resolvedJestConfig.moduleNameMapper || {}),
-
           // Handle CSS imports (with CSS modules)
           // https://jestjs.io/docs/webpack#mocking-css-modules
           '^.+\\.module\\.(css|sass|scss)$':
@@ -92,6 +88,11 @@ export default function nextJest(options: { dir?: string } = {}) {
           '^.+\\.(png|jpg|jpeg|gif|webp|avif|ico|bmp|svg)$': require.resolve(
             `./__mocks__/fileMock.js`
           ),
+
+          // custom config comes last to ensure the above rules are matched,
+          // fixes the case where @pages/(.*) -> src/pages/$! doesn't break
+          // CSS/image mocks
+          ...(resolvedJestConfig.moduleNameMapper || {}),
         },
         testPathIgnorePatterns: [
           // Don't look for tests in node_modules