Work around jest bug that swallows console output (#30405)

* Work around jest bug that swallows console output

Hacky workaround for https://github.com/jestjs/jest/issues/15747

* Fix unit test

* Only write logs if there are some to write

* Another test fix

test/setupTests.ts

@@ -6,12 +6,14 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
 Please see LICENSE files in the repository root for full details.
 */
 
+import { env } from "process";
 import "@testing-library/jest-dom";
 import "blob-polyfill";
 import { secureRandomString } from "matrix-js-sdk/src/randomstring";
 import { mocked } from "jest-mock";
 
-import { PredictableRandom } from "./test-utils/predictableRandom"; // https://github.com/jsdom/jsdom/issues/2555
+import { PredictableRandom } from "./test-utils/predictableRandom";
+import * as rageshake from "../src/rageshake/rageshake";
 
 declare global {
     // eslint-disable-next-line no-var
@@ -37,6 +39,23 @@ beforeEach(() => {
     });
 });
 
+// Somewhat hacky workaround for https://github.com/jestjs/jest/issues/15747: if the GHA reporter is enabled,
+// capture logs using the rageshake infrastructure, then dump them out after the test.
+if (env["GITHUB_ACTIONS"] !== undefined) {
+    beforeEach(async () => {
+        await rageshake.init(/* setUpPersistence = */ false);
+    });
+
+    afterEach(async () => {
+        const logs = global.mx_rage_logger.flush(/* keeplogs = */ false);
+        if (logs) {
+            process.stderr.write(`::group::Console logs from test '${expect.getState().currentTestName}'\n\n`);
+            process.stderr.write(logs);
+            process.stderr.write("::endgroup::\n");
+        }
+    });
+}
+
 // Very carefully enable the mocks for everything else in
 // a specific order. We use this order to ensure we properly
 // establish an application state that actually works.

test/unit-tests/components/views/dialogs/BugReportDialog-test.tsx

@@ -27,6 +27,7 @@ describe("BugReportDialog", () => {
         return render(<BugReportDialog onFinished={onFinished} />);
     }
 
+    let prevLogger: ConsoleLogger;
     beforeEach(() => {
         jest.resetAllMocks();
         SdkConfig.put({
@@ -48,24 +49,14 @@ describe("BugReportDialog", () => {
             consume: jest.fn(),
             warn: jest.fn(),
         } as unknown as Mocked<ConsoleLogger>;
+        mockConsoleLogger.flush.mockReturnValue("line 1\nline 2\n");
 
-        // @ts-ignore - mock the console logger
+        prevLogger = global.mx_rage_logger;
         global.mx_rage_logger = mockConsoleLogger;
-
-        // @ts-ignore
-        mockConsoleLogger.flush.mockReturnValue([
-            {
-                id: "instance-0",
-                line: "line 1",
-            },
-            {
-                id: "instance-1",
-                line: "line 2",
-            },
-        ]);
     });
 
     afterEach(() => {
+        global.mx_rage_logger = prevLogger;
         jest.restoreAllMocks();
         SdkConfig.reset();
         fetchMock.restore();

test/unit-tests/submit-rageshake-test.ts

@@ -524,25 +524,16 @@ describe("Rageshakes", () => {
             consume: jest.fn(),
             warn: jest.fn(),
         } as unknown as Mocked<ConsoleLogger>;
+        mockConsoleLogger.flush.mockReturnValue("line 1\nline 2\n");
 
-        // @ts-ignore - mock the console logger
+        const prevLogger = global.mx_rage_logger;
         global.mx_rage_logger = mockConsoleLogger;
-
+        try {
-        // @ts-ignore
+            const formData = await collectBugReport({ sendLogs: true });
-        mockConsoleLogger.flush.mockReturnValue([
+            expect(formData.get("compressed-log")).toBeDefined();
-            {
+        } finally {
-                id: "instance-0",
+            global.mx_rage_logger = prevLogger;
-                line: "line 1",
+        }
-            },
-            {
-                id: "instance-1",
-                line: "line 2",
-            },
-        ]);
-
-        const formData = await collectBugReport({ sendLogs: true });
-
-        expect(formData.get("compressed-log")).toBeDefined();
     });
 
     describe("A-Element-R label", () => {