fix(junit): merged report should preserve total duration

Fixes https://github.com/microsoft/playwright/issues/30518

packages/playwright/src/reporters/junit.ts

@@ -34,7 +34,6 @@ class JUnitReporter extends EmptyReporter {
   private configDir: string;
   private suite!: Suite;
   private timestamp!: Date;
-  private startTime!: number;
   private totalTests = 0;
   private totalFailures = 0;
   private totalSkipped = 0;
@@ -63,11 +62,9 @@ class JUnitReporter extends EmptyReporter {
   override onBegin(suite: Suite) {
     this.suite = suite;
     this.timestamp = new Date();
-    this.startTime = monotonicTime();
   }
 
   override async onEnd(result: FullResult) {
-    const duration = monotonicTime() - this.startTime;
     const children: XMLEntry[] = [];
     for (const projectSuite of this.suite.suites) {
       for (const fileSuite of projectSuite.suites)
@@ -85,7 +82,7 @@ class JUnitReporter extends EmptyReporter {
         failures: self.totalFailures,
         skipped: self.totalSkipped,
         errors: 0,
-        time: duration / 1000
+        time: result.duration / 1000
       },
       children
     };

tests/playwright-test/reporter-junit.spec.ts

@@ -505,5 +505,21 @@ for (const useIntermediateMergeReport of [false, true] as const) {
         expect(fs.existsSync(testInfo.outputPath('foo', 'bar', 'baz', 'my-report.xml'))).toBe(true);
       });
     });
+
+    test('testsuites time is test run wall time', async ({ runInlineTest }) => {
+      test.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/30518' });
+      const result = await runInlineTest({
+        'a.test.js': `
+          import { test, expect } from '@playwright/test';
+          test('one', async ({}) => {
+            await new Promise(f => setTimeout(f, 1000));
+          });
+        `
+      }, { reporter: 'junit' });
+      const xml = parseXML(result.output);
+      const time = +xml['testsuites']['$']['time'];
+      expect(time).toBe(result.report.stats.duration/1000);
+      expect(time).toBeGreaterThan(1);
+    });
   });
 }