fix: allow user to define testMatch in package.json (#1069)

close #1067

packages/@vue/cli-plugin-unit-jest/__tests__/jestPlugin.spec.js

@@ -11,3 +11,49 @@ test('should work', async () => {
   })
   await project.run(`vue-cli-service test`)
 })
+
+test('should respect jest testMatch config', async () => {
+  const project = await create('unit-jest-package.json', {
+    plugins: {
+      '@vue/cli-plugin-babel': {},
+      '@vue/cli-plugin-unit-jest': {}
+    }
+  })
+  const config = JSON.parse(await project.read('package.json'))
+  config.jest.testMatch = ['custom-test-directory/my.spec.js']
+
+  await project.write('package.json', JSON.stringify(config))
+
+  let result
+  try {
+    await project.run(`vue-cli-service test`)
+  } catch (e) {
+    result = e
+  }
+  expect(result.stdout).toMatch('testMatch: custom-test-directory/my.spec.js')
+  expect(result.stdout).toMatch('No tests found')
+})
+
+test('should respect jest.config.js testMatch config', async () => {
+  const project = await create('unit-jest-jest.config.js', {
+    plugins: {
+      '@vue/cli-plugin-babel': {},
+      '@vue/cli-plugin-unit-jest': {}
+    },
+    useConfigFiles: true
+  })
+  await project.write('jest.config.js', `
+  module.exports = ${JSON.stringify({
+    testMatch: ['custom-test-directory/my.spec.js']
+  })}
+  `)
+
+  let result
+  try {
+    await project.run(`vue-cli-service test`)
+  } catch (e) {
+    result = e
+  }
+  expect(result.stdout).toMatch('testMatch: custom-test-directory/my.spec.js')
+  expect(result.stdout).toMatch('No tests found')
+})

packages/@vue/cli-plugin-unit-jest/generator/index.js

@@ -28,6 +28,9 @@ module.exports = api => {
     // serializer for snapshots
     'snapshotSerializers': [
       'jest-serializer-vue'
+    ],
+    'testMatch': [
+      '<rootDir>/(tests/unit/**/*.spec.(ts|tsx|js)|**/__tests__/*.(ts|tsx|js))'
     ]
   }
 

packages/@vue/cli-plugin-unit-jest/index.js

@@ -17,18 +17,8 @@ module.exports = api => {
     const execa = require('execa')
     const jestBinPath = require.resolve('jest/bin/jest')
 
-    let testMatch = []
-    if (!args._.length) {
-      testMatch = [`--testMatch`, `<rootDir>/(tests/unit/**/*.spec.(ts|tsx|js)|**/__tests__/*.(ts|tsx|js))`]
-    }
-
-    const argv = [
-      ...rawArgv,
-      ...testMatch
-    ]
-
     return new Promise((resolve, reject) => {
-      const child = execa(jestBinPath, argv, {
+      const child = execa(jestBinPath, rawArgv, {
         cwd: api.resolve('.'),
         stdio: 'inherit'
       })