Add Golang test parser

src/parsers/golang-json/golang-json-parser.ts

@@ -0,0 +1,114 @@
+import { ParseOptions, TestParser } from '../../test-parser'
+
+import { GoTestEvent } from './golang-json-types'
+import { getExceptionSource } from '../../utils/node-utils'
+import { getBasePath, normalizeFilePath } from '../../utils/path-utils'
+
+import {
+  TestExecutionResult,
+  TestRunResult,
+  TestSuiteResult,
+  TestGroupResult,
+  TestCaseResult,
+  TestCaseError
+} from '../../test-results'
+
+export class GolangJsonParser implements TestParser {
+  assumedWorkDir: string | undefined
+
+  constructor(readonly options: ParseOptions) { }
+
+  async parse(path: string, content: string): Promise<TestRunResult> {
+    const events = await this.getGolangTestEvents(path, content)
+    return this.getTestRunResult(path, events)
+  }
+
+  private async getGolangTestEvents(path: string, content: string): Promise<GoTestEvent[]> {
+    return content.trim().split('\n').map((line, index) => {
+      try {
+        return JSON.parse(line) as GoTestEvent
+      } catch (e) {
+        throw new Error(`Invalid JSON at ${path} line ${index + 1}\n\n${e}`)
+      }
+    })
+  }
+
+  private getTestRunResult(path: string, events: GoTestEvent[]): TestRunResult {
+    const eventGroups = new Map<string, GoTestEvent[]>()
+    for (const event of events) {
+      if (!event.Test) {
+        continue
+      }
+      const k = `${event.Package}/${event.Test}`
+      let g = eventGroups.get(k)
+      if (!g) {
+        g = []
+        eventGroups.set(k, g)
+      }
+      g.push(event)
+    }
+
+    const suites: TestSuiteResult[] = []
+
+    for (const eventGroup of eventGroups.values()) {
+      const event = eventGroup[0]
+
+      let suite = suites.find(s => s.name === event.Package)
+      if (!suite) {
+        suite = new TestSuiteResult(event.Package, [])
+        suites.push(suite)
+      }
+
+      if (!event.Test) {
+        continue
+      }
+
+      let groupName: string | null
+      let testName: string
+      [groupName, testName] = event.Test.split('/', 2)
+      if (!testName) {
+        testName = groupName
+        groupName = null
+      }
+
+      let group = suite.groups.find(g => g.name === groupName)
+      if (!group) {
+        group = new TestGroupResult(groupName, [])
+        suite.groups.push(group)
+      }
+
+      const lastEvent = eventGroup.at(-1)!
+
+      const result: TestExecutionResult = lastEvent.Action === 'pass' ? 'success'
+        : lastEvent.Action === 'skip' ? 'skipped'
+          : 'failed'
+      if (lastEvent.Elapsed === undefined) {
+        throw new Error('missing elapsed on final test event')
+      }
+      const time: number = lastEvent.Elapsed * 1000
+
+      let error: TestCaseError | undefined = undefined
+      if (result !== 'success') {
+        const outputEvents = eventGroup
+          .filter(e => e.Action === 'output')
+          .map(e => e.Output ?? '')
+          // Go output prepends indentation to help group tests - remove it
+          .map(o => o.replace(/^    /, ''))
+
+        // First and last lines will be generic "test started" and "test finished" lines - remove them
+        outputEvents.splice(0, 1)
+        outputEvents.splice(-1, 1)
+
+        const details = outputEvents.join('')
+        error = {
+          message: details,
+          details: details
+        }
+      }
+
+      group.tests.push(new TestCaseResult(testName, result, time, error))
+    }
+
+    return new TestRunResult(path, suites)
+  }
+}

src/parsers/golang-json/golang-json-types.ts

@@ -0,0 +1,19 @@
+export type GoTestAction = 'start'
+  | 'run'
+  | 'pause'
+  | 'cont'
+  | 'pass'
+  | 'bench'
+  | 'fail'
+  | 'output'
+  | 'skip'
+
+export type GoTestEvent = {
+  Time: string
+  Action: GoTestAction
+  Package: string
+  Test?: string
+  Elapsed?: number
+  Output?: string
+  FailedBuild?: string
+}