test(integrations): Add unit tests for caputureconsole

Author: Luca Forstner

packages/integrations/test/captureconsole.test.ts

@@ -0,0 +1,288 @@
+import { Event, Integration } from '@sentry/types';
+import { CaptureConsole } from '../src/captureconsole';
+
+const mockScope = {
+  setLevel: jest.fn(),
+  setExtra: jest.fn(),
+  addEventProcessor: jest.fn(),
+};
+
+const mockHub = {
+  withScope: jest.fn(callback => {
+    callback(mockScope);
+  }),
+  captureMessage: jest.fn(),
+  captureException: jest.fn(),
+};
+
+const getMockHubWithIntegration = (integration: Integration) => ({
+  ...mockHub,
+  getIntegration: jest.fn(() => integration),
+});
+
+// We're using this to un-monkey patch the console after each test.
+const originalConsole = Object.assign({}, global.console);
+
+describe('CaptureConsole setup', () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+
+    // Un-monkey-patch the console functions
+    Object.assign(global.console, originalConsole);
+  });
+
+  it('should respect user-provided console levels', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log', 'warn'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    expect(global.console.error).toBe(originalConsole.error); // not monkey patched
+    expect(global.console.log).not.toBe(originalConsole.log); // monkey patched
+    expect(global.console.warn).not.toBe(originalConsole.warn); // monkey patched
+  });
+
+  it('should fall back to default console levels if none are provided', () => {
+    const captureConsoleIntegration = new CaptureConsole();
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // expect a set of defined console levels to have been monkey patched
+    expect(global.console.debug).not.toBe(originalConsole.debug);
+    expect(global.console.info).not.toBe(originalConsole.info);
+    expect(global.console.warn).not.toBe(originalConsole.warn);
+    expect(global.console.error).not.toBe(originalConsole.error);
+    expect(global.console.log).not.toBe(originalConsole.log);
+    expect(global.console.assert).not.toBe(originalConsole.assert);
+
+    // any other fields should not have been patched
+    expect(global.console.trace).toBe(originalConsole.trace);
+    expect(global.console.table).toBe(originalConsole.table);
+  });
+
+  it('setup should fail gracefully when console is not available', () => {
+    const consoleRef = global.console;
+    // remove console
+    delete global.console;
+
+    expect(() => {
+      const captureConsoleIntegration = new CaptureConsole();
+      captureConsoleIntegration.setupOnce(
+        () => undefined,
+        () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+      );
+    }).not.toThrow();
+
+    // reinstate initial console
+    global.console = consoleRef;
+  });
+
+  it('should set a level in the scope when console function is called', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // call a wrapped function
+    global.console.error('some logging message');
+
+    expect(mockScope.setLevel).toHaveBeenCalledTimes(1);
+    expect(mockScope.setLevel).toHaveBeenCalledWith('error');
+  });
+
+  it('should send arguments as extra data on failed assertion', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // call a wrapped function
+    global.console.log('some arg 1', 'some arg 2');
+    global.console.log();
+
+    expect(mockScope.setExtra).toHaveBeenCalledTimes(2);
+    expect(mockScope.setExtra).toHaveBeenCalledWith('arguments', ['some arg 1', 'some arg 2']);
+    expect(mockScope.setExtra).toHaveBeenCalledWith('arguments', []);
+  });
+
+  it('should add an event processor that sets the `logger` field of events', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // call a wrapped function
+    global.console.log('some message');
+
+    expect(mockScope.addEventProcessor).toHaveBeenCalledTimes(1);
+
+    const addedEventProcessor = mockScope.addEventProcessor.mock.calls[0][0];
+    const someEvent: Event = {};
+    addedEventProcessor(someEvent);
+
+    expect(someEvent.logger).toBe('console');
+  });
+
+  it('should capture message on a failed assertion', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['assert'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.assert(1 + 1 === 3);
+
+    expect(mockScope.setExtra).toHaveBeenLastCalledWith('arguments', []);
+    expect(mockHub.captureMessage).toHaveBeenCalledWith('Assertion failed: console.assert');
+  });
+
+  it('should capture correct message on a failed assertion with message', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['assert'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.assert(1 + 1 === 3, 'expression is false');
+
+    expect(mockScope.setExtra).toHaveBeenLastCalledWith('arguments', ['expression is false']);
+    expect(mockHub.captureMessage).toHaveBeenCalledWith('Assertion failed: expression is false');
+  });
+
+  it('should not capture message on a successful assertion', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['assert'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.assert(1 + 1 === 2);
+  });
+
+  it('should capture exception when console logs an error object with level set to "error"', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    const someError = new Error('some error');
+    global.console.error(someError);
+
+    expect(mockHub.captureException).toHaveBeenCalledWith(someError);
+  });
+
+  it('should capture message when console logs a non-error object with level set to "error"', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.error('some non-error message');
+
+    expect(mockHub.captureMessage).toHaveBeenCalledWith('some non-error message');
+    expect(mockHub.captureException).not.toHaveBeenCalled();
+  });
+
+  it('should capture a message for non-error log levels', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['info'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.info('some message');
+
+    expect(mockHub.captureMessage).toHaveBeenCalledWith('some message');
+  });
+
+  it('should call the original console function when console members are called', () => {
+    // Mock console log to test if it was called
+    const originalConsoleLog = global.console.log;
+    const mockConsoleLog = jest.fn();
+    global.console.log = mockConsoleLog;
+
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    global.console.log('some message 1', 'some message 2');
+
+    expect(mockConsoleLog).toHaveBeenCalledWith('some message 1', 'some message 2');
+
+    // Reset console log
+    global.console.log = originalConsoleLog;
+  });
+
+  it('should not wrap any levels that are not members of console', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log', 'someNonExistingLevel', 'error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // The provided level should not be created
+    expect(global.console['someNonExistingLevel']).toBeUndefined();
+
+    // Ohter levels should be wrapped as expected
+    expect(global.console.log).not.toBe(originalConsole.log);
+    expect(global.console.error).not.toBe(originalConsole.error);
+  });
+
+  it('should not wrap any levels that are not members of console', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log', 'someNonExistingLevel', 'error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    // The provided level should not be created
+    expect(global.console['someNonExistingLevel']).toBeUndefined();
+
+    // Ohter levels should be wrapped as expected
+    expect(global.console.log).not.toBe(originalConsole.log);
+    expect(global.console.error).not.toBe(originalConsole.error);
+  });
+
+  it('should wrap the console when the client does not have a registered captureconsole integration, but not capture any messages', () => {
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log', 'error'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(null) as any, // simulate not having the integration registered
+    );
+
+    // Console should be wrapped
+    expect(global.console.log).not.toBe(originalConsole.log);
+    expect(global.console.error).not.toBe(originalConsole.error);
+
+    // Should not capture messages
+    global.console.log('some message');
+    expect(mockHub.captureMessage).not.toHaveBeenCalledWith();
+  });
+
+  it("should not crash when the original console methods don't exist at time of invocation", () => {
+    const originalConsoleLog = global.console.log;
+    global.console.log = undefined; // don't `delete` here, otherwise `fill` won't wrap the function
+
+    const captureConsoleIntegration = new CaptureConsole({ levels: ['log'] });
+    captureConsoleIntegration.setupOnce(
+      () => undefined,
+      () => getMockHubWithIntegration(captureConsoleIntegration) as any,
+    );
+
+    expect(() => {
+      global.console.log('some message');
+    }).not.toThrow();
+
+    global.console.log = originalConsoleLog;
+  });
+});