github: apiURL

Also took the opportunity to make some methods static

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

__tests__/github.test.ts

@@ -13,14 +13,19 @@ jest.spyOn(GitHub.prototype, 'repoData').mockImplementation((): Promise<GitHubRe
   return <Promise<GitHubRepo>>(repoFixture as unknown);
 });
 
+describe('repoData', () => {
+  it('returns GitHub repository', async () => {
+    const github = new GitHub();
+    expect((await github.repoData()).name).toEqual('Hello-World');
+  });
+});
+
 describe('context', () => {
   it('returns repository name from payload', async () => {
-    const github = new GitHub();
-    expect(github.context.payload.repository?.name).toEqual('test-docker-action');
+    expect(GitHub.context.payload.repository?.name).toEqual('test-docker-action');
   });
   it('is repository private', async () => {
-    const github = new GitHub();
-    expect(github.context.payload.repository?.private).toEqual(true);
+    expect(GitHub.context.payload.repository?.private).toEqual(true);
   });
 });
 
@@ -38,12 +43,31 @@ describe('serverURL', () => {
   });
   it('returns default', async () => {
     process.env.GITHUB_SERVER_URL = '';
-    const github = new GitHub();
-    expect(github.serverURL).toEqual('https://github.com');
+    expect(GitHub.serverURL).toEqual('https://github.com');
   });
   it('returns from env', async () => {
-    const github = new GitHub();
-    expect(github.serverURL).toEqual('https://foo.github.com');
+    expect(GitHub.serverURL).toEqual('https://foo.github.com');
+  });
+});
+
+describe('apiURL', () => {
+  const originalEnv = process.env;
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = {
+      ...originalEnv,
+      GITHUB_API_URL: 'https://bar.github.com'
+    };
+  });
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+  it('returns default', async () => {
+    process.env.GITHUB_API_URL = '';
+    expect(GitHub.apiURL).toEqual('https://api.github.com');
+  });
+  it('returns from env', async () => {
+    expect(GitHub.apiURL).toEqual('https://bar.github.com');
   });
 });
 
@@ -60,21 +84,12 @@ describe('actionsRuntimeToken', () => {
   });
   it('empty', async () => {
     process.env.ACTIONS_RUNTIME_TOKEN = '';
-    const github = new GitHub();
-    expect(github.actionsRuntimeToken).toEqual({});
+    expect(GitHub.actionsRuntimeToken).toEqual({});
   });
   it('fixture', async () => {
     process.env.ACTIONS_RUNTIME_TOKEN = fs.readFileSync(path.join(__dirname, 'fixtures', 'runtimeToken.txt')).toString().trim();
-    const github = new GitHub();
-    const runtimeToken = github.actionsRuntimeToken;
+    const runtimeToken = GitHub.actionsRuntimeToken;
     expect(runtimeToken.ac).toEqual('[{"Scope":"refs/heads/master","Permission":3}]');
     expect(runtimeToken.iss).toEqual('vstoken.actions.githubusercontent.com');
   });
 });
-
-describe('repoData', () => {
-  it('returns GitHub repository', async () => {
-    const github = new GitHub();
-    expect((await github.repoData()).name).toEqual('Hello-World');
-  });
-});