First pass at a PosthogAnalytics class

test/PosthogAnalytics-test.ts

@@ -0,0 +1,84 @@
+import { IEvent, PosthogAnalytics } from '../src/PosthogAnalytics';
+import SdkConfig from '../src/SdkConfig';
+const crypto = require('crypto');
+
+class FakePosthog {
+    public capture;
+    public init;
+
+    constructor() {
+        this.capture = jest.fn();
+        this.init = jest.fn();
+    }
+}
+
+export interface ITestEvent extends IEvent {
+    key: "jest_test_event",
+    properties: {
+        foo: string
+    }
+}
+
+describe("PosthogAnalytics", () => {
+    let analytics: PosthogAnalytics;
+    let fakePosthog: FakePosthog;
+
+    beforeEach(() => {
+        fakePosthog = new FakePosthog();
+        analytics = new PosthogAnalytics(fakePosthog);
+        window.crypto = {
+            subtle: crypto.webcrypto.subtle,
+        };
+    });
+
+    afterEach(() => {
+        navigator.doNotTrack = null;
+        window.crypto = null;
+    });
+
+    it("Should not initialise if DNT is enabled", () => {
+        navigator.doNotTrack = "1";
+        analytics.init(false);
+        expect(analytics.isInitialised()).toBe(false);
+    });
+
+    it("Should not initialise if config is not set", () => {
+        jest.spyOn(SdkConfig, "get").mockReturnValue({});
+        analytics.init(false);
+        expect(analytics.isInitialised()).toBe(false);
+    });
+
+    it("Should initialise if config is set", () => {
+        jest.spyOn(SdkConfig, "get").mockReturnValue({
+            posthog: {
+                projectApiKey: "foo",
+                apiHost: "bar",
+            },
+        });
+        analytics.init(false);
+        expect(analytics.isInitialised()).toBe(true);
+    });
+
+    it("Should pass track() to posthog", () => {
+        analytics.init(false);
+        analytics.track<ITestEvent>("jest_test_event", {
+            foo: "bar",
+        });
+        expect(fakePosthog.capture.mock.calls[0][0]).toBe("jest_test_event");
+        expect(fakePosthog.capture.mock.calls[0][1]).toEqual({ foo: "bar" });
+    });
+
+    it("Should pass trackRoomEvent to posthog", () => {
+        analytics.init(false);
+        const roomId = "42";
+        return analytics.trackRoomEvent<ITestEvent>("jest_test_event", roomId, {
+            foo: "bar",
+        }).then(() => {
+            expect(fakePosthog.capture.mock.calls[0][0]).toBe("jest_test_event");
+            expect(fakePosthog.capture.mock.calls[0][1]).toEqual({
+                foo: "bar",
+                hashedRoomId: "73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049",
+            });
+        });
+    });
+});