Add tests for integration setup in node init

Author: Luca Forstner

packages/node/test/sdk.test.ts

@@ -0,0 +1,91 @@
+import { Integration } from '@sentry/types';
+import { init } from '../src/sdk';
+import * as sdk from '../src/sdk';
+
+// eslint-disable-next-line no-var
+declare var global: any;
+
+const PUBLIC_DSN = 'https://username@domain/123';
+
+class MockIntegration implements Integration {
+  public name: string;
+  public setupOnce = jest.fn();
+  public constructor(name: string) {
+    this.name = name;
+  }
+}
+
+const defaultIntegrationsBackup = sdk.defaultIntegrations;
+
+describe('init()', () => {
+  beforeEach(() => {
+    global.__SENTRY__ = {};
+  });
+
+  afterEach(() => {
+    // @ts-ignore
+    sdk.defaultIntegrations = defaultIntegrationsBackup;
+  });
+
+  it("doesn't install default integrations if told not to", () => {
+    const mockDefaultIntegrations = [
+      new MockIntegration('Mock integration 1.1'),
+      new MockIntegration('Mock integration 1.2'),
+    ];
+
+    //@ts-ignore
+    sdk.defaultIntegrations = mockDefaultIntegrations;
+
+    init({ dsn: PUBLIC_DSN, defaultIntegrations: false });
+
+    expect(mockDefaultIntegrations[0].setupOnce as jest.Mock).toHaveBeenCalledTimes(0);
+    expect(mockDefaultIntegrations[1].setupOnce as jest.Mock).toHaveBeenCalledTimes(0);
+  });
+
+  it('installs merged default integrations, with overrides provided through options', () => {
+    const mockDefaultIntegrations = [
+      new MockIntegration('Some mock integration 2.1'),
+      new MockIntegration('Some mock integration 2.2'),
+    ];
+
+    //@ts-ignore
+    sdk.defaultIntegrations = mockDefaultIntegrations;
+
+    const mockIntegrations = [
+      new MockIntegration('Some mock integration 2.1'),
+      new MockIntegration('Some mock integration 2.3'),
+    ];
+
+    init({ dsn: PUBLIC_DSN, integrations: mockIntegrations });
+
+    expect(mockDefaultIntegrations[0].setupOnce as jest.Mock).toHaveBeenCalledTimes(0);
+    expect(mockDefaultIntegrations[1].setupOnce as jest.Mock).toHaveBeenCalledTimes(1);
+    expect(mockIntegrations[0].setupOnce as jest.Mock).toHaveBeenCalledTimes(1);
+    expect(mockIntegrations[1].setupOnce as jest.Mock).toHaveBeenCalledTimes(1);
+  });
+
+  it('installs integrations returned from a callback function', () => {
+    const mockDefaultIntegrations = [
+      new MockIntegration('Some mock integration 3.1'),
+      new MockIntegration('Some mock integration 3.2'),
+    ];
+
+    //@ts-ignore
+    sdk.defaultIntegrations = mockDefaultIntegrations;
+
+    const newIntegration = new MockIntegration('Some mock integration 3.3');
+
+    init({
+      dsn: PUBLIC_DSN,
+      integrations: integrations => {
+        const newIntegrations = [...integrations];
+        newIntegrations[1] = newIntegration;
+        return newIntegrations;
+      },
+    });
+
+    expect(mockDefaultIntegrations[0].setupOnce as jest.Mock).toHaveBeenCalledTimes(1);
+    expect(mockDefaultIntegrations[1].setupOnce as jest.Mock).toHaveBeenCalledTimes(0);
+    expect(newIntegration.setupOnce as jest.Mock).toHaveBeenCalledTimes(1);
+  });
+});