feat(reporter): add support for function type to classname option in the junit reporter

docs/guide/reporters.md

@@ -249,13 +249,17 @@ AssertionError: expected 5 to be 4 // Object.is equality
 </testsuites>
 ```
 
-The outputted XML contains nested `testsuites` and `testcase` tags. You can use the reporter options to configure these attributes:
+The outputted XML contains nested `testsuites` and `testcase` tags. These can also be customized via reporter options `suiteName` and `classnameTemplate`. `classnameTemplate` can either be a template string or a function.
+
+The supported placeholders for the `classnameTemplate` option are:
+- filename
+- filepath
 
 ```ts
 export default defineConfig({
   test: {
     reporters: [
-      ['junit', { suiteName: 'custom suite name', classname: 'custom-classname' }]
+      ['junit', { suiteName: 'custom suite name', classnameTemplate: 'filename:{filename} - filepath:{filepath}' }]
     ]
   },
 })

packages/vitest/src/node/reporters/junit.ts

@@ -11,9 +11,20 @@ import { getOutputFile } from '../../utils/config-helpers'
 import { capturePrintError } from '../error'
 import { IndentedLogger } from './renderers/indented-logger'
 
+interface ClassnameTemplateVariables {
+  filename: string
+  filepath: string
+}
+
 export interface JUnitOptions {
   outputFile?: string
+  /** @deprecated Use `classnameTemplate` instead. */
   classname?: string
+
+  /**
+   * Template for the classname attribute. Can be either a string or a function. The string can contain placeholders {filename} and {filepath}.
+   */
+  classnameTemplate?: string | ((classnameVariables: ClassnameTemplateVariables) => string)
   suiteName?: string
   /**
    * Write <system-out> and <system-err> for console output
@@ -195,10 +206,29 @@ export class JUnitReporter implements Reporter {
 
   async writeTasks(tasks: Task[], filename: string): Promise<void> {
     for (const task of tasks) {
+      let classname = filename
+
+      const templateVars: ClassnameTemplateVariables = {
+        filename: task.file.name,
+        filepath: task.file.filepath,
+      }
+
+      if (typeof this.options.classnameTemplate === 'function') {
+        classname = this.options.classnameTemplate(templateVars)
+      }
+      else if (typeof this.options.classnameTemplate === 'string') {
+        classname = this.options.classnameTemplate
+          .replace(/\{filename\}/g, templateVars.filename)
+          .replace(/\{filepath\}/g, templateVars.filepath)
+      }
+      else if (typeof this.options.classname === 'string') {
+        classname = this.options.classname
+      }
+
       await this.writeElement(
         'testcase',
         {
-          classname: this.options.classname ?? filename,
+          classname,
           file: this.options.addFileAttribute ? filename : undefined,
           name: task.name,
           time: getDuration(task),

test/reporters/src/data.ts

@@ -25,6 +25,37 @@ const suite: Suite = {
   tasks: [],
 }
 
+const passedFile: File = {
+  id: '1223128da3',
+  name: 'basic.test.ts',
+  type: 'suite',
+  suite,
+  meta: {},
+  mode: 'run',
+  filepath: '/vitest/test/core/test/basic.test.ts',
+  result: { state: 'pass', duration: 145.99284195899963 },
+  tasks: [
+  ],
+  projectName: '',
+  file: null!,
+}
+passedFile.file = passedFile
+passedFile.tasks.push({
+  id: '1223128da3_0_0',
+  type: 'test',
+  name: 'Math.sqrt()',
+  mode: 'run',
+  fails: undefined,
+  suite,
+  meta: {},
+  file: passedFile,
+  result: {
+    state: 'pass',
+    duration: 1.4422860145568848,
+  },
+  context: null as any,
+})
+
 const error: ErrorWithDiff = {
   name: 'AssertionError',
   message: 'expected 2.23606797749979 to equal 2',
@@ -176,5 +207,6 @@ file.tasks = [suite]
 suite.tasks = tasks
 
 const files = [file]
+const passedFiles = [passedFile]
 
-export { files }
+export { files, passedFiles }

test/reporters/tests/__snapshots__/reporters.spec.ts.snap

@@ -14,6 +14,39 @@ exports[`JUnit reporter 1`] = `
 "
 `;
 
+exports[`JUnit reporter with custom function classnameTemplate 1`] = `
+"<?xml version="1.0" encoding="UTF-8" ?>
+<testsuites name="vitest tests" tests="1" failures="0" errors="0" time="0">
+    <testsuite name="test/core/test/basic.test.ts" timestamp="2022-01-19T10:10:01.759Z" hostname="hostname" tests="1" failures="0" errors="0" skipped="0" time="0.145992842">
+        <testcase classname="filename:basic.test.ts - filepath:/vitest/test/core/test/basic.test.ts" name="Math.sqrt()" time="0.001442286">
+        </testcase>
+    </testsuite>
+</testsuites>
+"
+`;
+
+exports[`JUnit reporter with custom string classname 1`] = `
+"<?xml version="1.0" encoding="UTF-8" ?>
+<testsuites name="vitest tests" tests="1" failures="0" errors="0" time="0">
+    <testsuite name="test/core/test/basic.test.ts" timestamp="2022-01-19T10:10:01.759Z" hostname="hostname" tests="1" failures="0" errors="0" skipped="0" time="0.145992842">
+        <testcase classname="my-custom-classname" name="Math.sqrt()" time="0.001442286">
+        </testcase>
+    </testsuite>
+</testsuites>
+"
+`;
+
+exports[`JUnit reporter with custom string classnameTemplate 1`] = `
+"<?xml version="1.0" encoding="UTF-8" ?>
+<testsuites name="vitest tests" tests="1" failures="0" errors="0" time="0">
+    <testsuite name="test/core/test/basic.test.ts" timestamp="2022-01-19T10:10:01.759Z" hostname="hostname" tests="1" failures="0" errors="0" skipped="0" time="0.145992842">
+        <testcase classname="filename:basic.test.ts - filepath:/vitest/test/core/test/basic.test.ts" name="Math.sqrt()" time="0.001442286">
+        </testcase>
+    </testsuite>
+</testsuites>
+"
+`;
+
 exports[`JUnit reporter with outputFile 1`] = `
 "JUNIT report written to <process-cwd>/report.xml
 "
@@ -62,6 +95,17 @@ exports[`JUnit reporter with outputFile object in non-existing directory 2`] = `
 "
 `;
 
+exports[`JUnit reporter without classname 1`] = `
+"<?xml version="1.0" encoding="UTF-8" ?>
+<testsuites name="vitest tests" tests="1" failures="0" errors="0" time="0">
+    <testsuite name="test/core/test/basic.test.ts" timestamp="2022-01-19T10:10:01.759Z" hostname="hostname" tests="1" failures="0" errors="0" skipped="0" time="0.145992842">
+        <testcase classname="test/core/test/basic.test.ts" name="Math.sqrt()" time="0.001442286">
+        </testcase>
+    </testsuite>
+</testsuites>
+"
+`;
+
 exports[`json reporter (no outputFile entry) 1`] = `
 {
   "numFailedTestSuites": 1,

test/reporters/tests/reporters.spec.ts

@@ -6,7 +6,7 @@ import { JUnitReporter } from '../../../packages/vitest/src/node/reporters/junit
 import { TapReporter } from '../../../packages/vitest/src/node/reporters/tap'
 import { TapFlatReporter } from '../../../packages/vitest/src/node/reporters/tap-flat'
 import { getContext } from '../src/context'
-import { files } from '../src/data'
+import { files, passedFiles } from '../src/data'
 
 const beautify = (json: string) => JSON.parse(json)
 
@@ -60,6 +60,61 @@ test('JUnit reporter', async () => {
   expect(context.output).toMatchSnapshot()
 })
 
+test('JUnit reporter without classname', async () => {
+  // Arrange
+  const reporter = new JUnitReporter({})
+  const context = getContext()
+
+  // Act
+  await reporter.onInit(context.vitest)
+
+  await reporter.onFinished(passedFiles)
+
+  // Assert
+  expect(context.output).toMatchSnapshot()
+})
+
+test('JUnit reporter with custom string classname', async () => {
+  // Arrange
+  const reporter = new JUnitReporter({ classname: 'my-custom-classname' })
+  const context = getContext()
+
+  // Act
+  await reporter.onInit(context.vitest)
+
+  await reporter.onFinished(passedFiles)
+
+  // Assert
+  expect(context.output).toMatchSnapshot()
+})
+
+test('JUnit reporter with custom function classnameTemplate', async () => {
+  // Arrange
+  const reporter = new JUnitReporter({ classnameTemplate: task => `filename:${task.filename} - filepath:${task.filepath}` })
+  const context = getContext()
+
+  // Act
+  await reporter.onInit(context.vitest)
+
+  await reporter.onFinished(passedFiles)
+
+  // Assert
+  expect(context.output).toMatchSnapshot()
+})
+test('JUnit reporter with custom string classnameTemplate', async () => {
+  // Arrange
+  const reporter = new JUnitReporter({ classnameTemplate: `filename:{filename} - filepath:{filepath}` })
+  const context = getContext()
+
+  // Act
+  await reporter.onInit(context.vitest)
+
+  await reporter.onFinished(passedFiles)
+
+  // Assert
+  expect(context.output).toMatchSnapshot()
+})
+
 test('JUnit reporter (no outputFile entry)', async () => {
   // Arrange
   const reporter = new JUnitReporter({})