Favor spy with preloaded data over actual download

__tests__/distributors/corretto-installer.test.ts

@@ -1,12 +1,30 @@
 import { HttpClient } from '@actions/http-client';
 
 import { CorettoDistribution } from '../../src/distributions/corretto/installer';
-import { JavaInstallerOptions } from '../../src/distributions/base-models';
+import * as util from '../../src/util';
+
+const manifestData = require('../data/corretto.json') as [];
 
 describe('getAvailableVersions', () => {
-  beforeEach(() => {});
+  let spyHttpClient: jest.SpyInstance;
+  let spyGetDownloadArchiveExtension: jest.SpyInstance;
 
-  afterEach(() => {});
+  beforeEach(() => {
+    spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
+    spyHttpClient.mockReturnValue({
+      statusCode: 200,
+      headers: {},
+      result: manifestData
+    });
+    spyGetDownloadArchiveExtension = jest.spyOn(util, 'getDownloadArchiveExtension');
+    spyGetDownloadArchiveExtension.mockReturnValue('tar.gz');
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+    jest.restoreAllMocks();
+  });
 
   it('load available versions', async () => {
     const distribution = new CorettoDistribution({
@@ -15,6 +33,7 @@ describe('getAvailableVersions', () => {
       packageType: 'jdk',
       checkLatest: false
     });
+    distribution['getPlatformOption'] = () => 'linux';
 
     const availableVersions = await distribution['getAvailableVersions']();
     expect(availableVersions).not.toBeNull();
@@ -23,11 +42,12 @@ describe('getAvailableVersions', () => {
 
   it('find package for download', async () => {
     const distribution = new CorettoDistribution({
-      version: '11',
+      version: '15',
       architecture: 'x64',
       packageType: 'jdk',
       checkLatest: false
     });
+    distribution['getPlatformOption'] = () => 'linux';
 
     const availableVersion = await distribution['findPackageForDownload']('15');
     expect(availableVersion).not.toBeNull();

src/distributions/corretto/installer.ts

@@ -122,7 +122,7 @@ export class CorettoDistribution extends JavaBase {
     // Coretto has its own platform names so we need to map them
     switch (process.platform) {
       case 'darwin':
-        return 'mac';
+        return 'macos';
       case 'win32':
         return 'windows';
       default: