feat(repo-tools): output "All tests pass." on silent reporter success

packages/repo-tools/src/vitest-reporters/silent-reporter.test.ts

@@ -1,4 +1,6 @@
-import { describe, expect, it } from 'vitest';
+import type { File as VitestFile } from '@vitest/runner';
+import { describe, expect, it, vi } from 'vitest';
+import { DotReporter } from 'vitest/reporters';
 
 import { SilentReporter } from './silent-reporter.ts';
 
@@ -38,4 +40,55 @@ describe('SilentReporter', () => {
       // and not 2 levels which would only reach DotReporter
     });
   });
+
+  describe('reportSummary', () => {
+    it('writes "All tests pass." when all tests pass', () => {
+      const reporter = new SilentReporter();
+      const writeSpy = vi
+        .spyOn(process.stdout, 'write')
+        .mockImplementation(() => true);
+
+      const passingFile = {
+        result: { state: 'pass' },
+        tasks: [],
+      } as unknown as VitestFile;
+      reporter.reportSummary([passingFile], []);
+
+      expect(writeSpy).toHaveBeenCalledWith('All tests pass.\n');
+      writeSpy.mockRestore();
+    });
+
+    it('calls super.reportSummary when a file fails', () => {
+      const reporter = new SilentReporter();
+      const superSpy = vi
+        .spyOn(DotReporter.prototype, 'reportSummary')
+        .mockImplementation(() => undefined);
+
+      const failingFile = {
+        result: { state: 'fail' },
+        tasks: [],
+      } as unknown as VitestFile;
+      reporter.reportSummary([failingFile], []);
+
+      expect(superSpy).toHaveBeenCalledWith([failingFile], []);
+      superSpy.mockRestore();
+    });
+
+    it('calls super.reportSummary when there are errors', () => {
+      const reporter = new SilentReporter();
+      const superSpy = vi
+        .spyOn(DotReporter.prototype, 'reportSummary')
+        .mockImplementation(() => undefined);
+
+      const passingFile = {
+        result: { state: 'pass' },
+        tasks: [],
+      } as unknown as VitestFile;
+      const error = new Error('unhandled');
+      reporter.reportSummary([passingFile], [error]);
+
+      expect(superSpy).toHaveBeenCalledWith([passingFile], [error]);
+      superSpy.mockRestore();
+    });
+  });
 });

packages/repo-tools/src/vitest-reporters/silent-reporter.ts

@@ -85,8 +85,9 @@ export class SilentReporter extends DotReporter {
 
     if (hasFailed || errors.length > 0) {
       super.reportSummary(files, errors);
+    } else {
+      process.stdout.write('All tests pass.\n');
     }
-    // Silent when all pass
   }
 }