test: Add unit testing (get-latest-version) (#132)

__tests__/get-latest-version.test.ts

@@ -0,0 +1,64 @@
+import {getURL, getLatestVersion} from '../src/get-latest-version';
+import nock from 'nock';
+import {FetchError} from 'node-fetch';
+import {Tool} from '../src/constants';
+import jsonTestBrew from './data/brew.json';
+import jsonTestGithub from './data/github.json';
+
+beforeEach(() => {
+  jest.resetModules();
+});
+
+afterEach(() => {
+  nock.cleanAll();
+});
+
+describe('getURL()', () => {
+  test('return expected URL', () => {
+    const urlBrewExpected = `https://formulae.brew.sh/api/formula/${Tool.Repo}.json`;
+    const urlBrew: string = getURL(Tool.Org, Tool.Repo, 'brew');
+    expect(urlBrew).toMatch(urlBrewExpected);
+
+    const urlGithubExpected = `https://api.github.com/repos/${Tool.Org}/${Tool.Repo}/releases/latest`;
+    const urlGithub: string = getURL(Tool.Org, Tool.Repo, 'github');
+    expect(urlGithub).toMatch(urlGithubExpected);
+  });
+});
+
+describe('getLatestVersion()', () => {
+  test('return latest version via brew', async () => {
+    nock('https://formulae.brew.sh')
+      .get(`/api/formula/${Tool.Repo}.json`)
+      .reply(200, jsonTestBrew);
+
+    const versionLatest: string = await getLatestVersion(
+      Tool.Org,
+      Tool.Repo,
+      'brew'
+    );
+    expect(versionLatest).toMatch(Tool.TestVersionLatest);
+  });
+
+  test('return latest version via GitHub', async () => {
+    nock('https://api.github.com')
+      .get(`/repos/${Tool.Org}/${Tool.Repo}/releases/latest`)
+      .reply(200, jsonTestGithub);
+
+    const versionLatest: string = await getLatestVersion(
+      Tool.Org,
+      Tool.Repo,
+      'github'
+    );
+    expect(versionLatest).toMatch(Tool.TestVersionLatest);
+  });
+
+  test('return exception 404', async () => {
+    nock('https://formulae.brew.sh')
+      .get(`/api/formula/${Tool.Repo}.json`)
+      .reply(404);
+
+    await expect(
+      getLatestVersion(Tool.Org, Tool.Repo, 'brew')
+    ).rejects.toThrowError(FetchError);
+  });
+});

__tests__/main.test.ts

@@ -56,7 +56,8 @@ describe('showVersion()', () => {
   });
 
   test('return not found', async () => {
-    result = await main.showVersion('gitgit', ['--version']);
-    expect(result.exitcode).not.toBe(0);
+    await expect(
+      main.showVersion('gitgit', ['--version'])
+    ).rejects.toThrowError(Error);
   });
 });