review comments and updated test cases

__tests__/actionUtils.test.ts

@@ -1,10 +1,12 @@
 import * as core from "@actions/core";
+import * as cache from "@actions/cache";
 
 import { Events, Outputs, RefKey, State } from "../src/constants";
 import * as actionUtils from "../src/utils/actionUtils";
 import * as testUtils from "../src/utils/testUtils";
 
 jest.mock("@actions/core");
+jest.mock("@actions/cache");
 
 beforeAll(() => {
     jest.spyOn(core, "getInput").mockImplementation((name, options) => {
@@ -232,3 +234,41 @@ test("getInputAsInt throws if required and value missing", () => {
         actionUtils.getInputAsInt("undefined", { required: true })
     ).toThrowError();
 });
+
+test("isCacheFeatureAvailable for ac enabled", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => true);
+
+    expect(actionUtils.isCacheFeatureAvailable()).toBe(true);
+});
+
+test("isCacheFeatureAvailable for ac disabled on GHES", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
+
+    const message = "Cache action is only supported on GHES version >= 3.5. If you are on version >=3.5 Please check with GHES admin if ArtifactCache service is enabled or not.";
+    const infoMock = jest.spyOn(core, "info");
+
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://example.com";
+        expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
+    } finally {
+        delete  process.env["GITHUB_SERVER_URL"];
+    }
+
+});
+
+test("isCacheFeatureAvailable for ac disabled on dotcom", () => {
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
+
+    const message = "An internal error has occurred in cache backend. Please check https://www.githubstatus.com/ for any ongoing issue in actions.";
+    const infoMock = jest.spyOn(core, "info");
+
+    try {
+        process.env["GITHUB_SERVER_URL"] = "http://github.com";
+        expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
+    } finally {
+        delete  process.env["GITHUB_SERVER_URL"];
+    }
+
+});