feat: add-feature-flags-test-cases

Author: ahmedAlaaInstabug

test/utils/FeatureFlags.spec.ts

@@ -0,0 +1,44 @@
+import { NativeInstabug } from '../../src/native/NativeInstabug';
+import { FeatureFlags, registerW3CFlagsListener } from '../../src/utils/FeatureFlags';
+import { _registerW3CFlagsChangeListener } from '../../src/modules/Instabug';
+
+jest.mock('../../src/modules/Instabug', () => ({
+  _registerW3CFlagsChangeListener: jest.fn(),
+}));
+
+describe('FeatureFlags', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('calls native methods by default', () => {
+    (NativeInstabug.isW3ExternalTraceIDEnabled as jest.Mock).mockReturnValue(true);
+    (NativeInstabug.isW3ExternalGeneratedHeaderEnabled as jest.Mock).mockReturnValue(false);
+    (NativeInstabug.isW3CaughtHeaderEnabled as jest.Mock).mockReturnValue(true);
+
+    expect(FeatureFlags.isW3ExternalTraceID()).toBe(true);
+    expect(FeatureFlags.isW3ExternalGeneratedHeader()).toBe(false);
+    expect(FeatureFlags.isW3CaughtHeader()).toBe(true);
+  });
+
+  it('overrides flags after listener is registered', async () => {
+    const mockListener = jest.fn();
+    (_registerW3CFlagsChangeListener as jest.Mock).mockImplementation((cb) => {
+      mockListener.mockImplementation(cb);
+      cb({
+        isW3ExternalTraceIDEnabled: false,
+        isW3ExternalGeneratedHeaderEnabled: true,
+        isW3CaughtHeaderEnabled: false,
+      });
+    });
+
+    registerW3CFlagsListener();
+
+    expect(typeof FeatureFlags.isW3ExternalTraceID).toBe('function');
+
+    // @ts-ignore - these are now async after listener runs
+    await expect(FeatureFlags.isW3ExternalTraceID()).resolves.toBe(false);
+    await expect(FeatureFlags.isW3ExternalGeneratedHeader()).resolves.toBe(true);
+    await expect(FeatureFlags.isW3CaughtHeader()).resolves.toBe(false);
+  });
+});