Add test to check that OfflineFeatures doesn't use the API client

Author: mbg

src/feature-flags/offline-features.test.ts

@@ -0,0 +1,37 @@
+import test from "ava";
+import * as sinon from "sinon";
+
+import * as apiClient from "../api-client";
+import { Feature, featureConfig } from "../feature-flags";
+import { mockCCR, setupTests } from "../testing-utils";
+import { initializeEnvironment, withTmpDir } from "../util";
+
+import {
+  getFeatureIncludingCodeQlIfRequired,
+  setUpFeatureFlagTests,
+} from "./test-util";
+
+setupTests(test);
+
+test.beforeEach(() => {
+  initializeEnvironment("1.2.3");
+  mockCCR();
+});
+
+test("OfflineFeatures makes no API requests", async (t) => {
+  await withTmpDir(async (tmpDir) => {
+    const features = setUpFeatureFlagTests(tmpDir);
+    t.is("OfflineFeatures", features.constructor.name);
+
+    sinon
+      .stub(apiClient, "getApiClient")
+      .throws(new Error("Should not have called getApiClient"));
+
+    for (const feature of Object.values(Feature)) {
+      t.deepEqual(
+        await getFeatureIncludingCodeQlIfRequired(features, feature),
+        featureConfig[feature].defaultValue,
+      );
+    }
+  });
+});