test: cli test coverage complete

src/cli.spec.ts

@@ -0,0 +1,114 @@
+import { spawnSync } from 'child_process';
+import mockConsole, { RestoreConsole } from 'jest-mock-console';
+import * as nock from 'nock';
+import { resolve } from 'path';
+
+import { consoleMockCallJoin, nockEndpoint } from '../test/test-utils';
+import { main } from './cli';
+import { defaultRegions } from './regions';
+
+describe('cli', () => {
+  describe('test by import', () => {
+    let restoreConsole: RestoreConsole;
+
+    beforeAll(() => {
+      jest.setTimeout(30000);
+      defaultRegions.forEach(region => nockEndpoint({ region }));
+    });
+
+    afterAll(() => {
+      jest.setTimeout(5000);
+      nock.cleanAll();
+    });
+
+    beforeEach(() => {
+      restoreConsole = mockConsole();
+    });
+
+    afterEach(() => {
+      restoreConsole();
+    });
+
+    it('should print help', async () => {
+      await main(['--help']);
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should return expected values with default options', async () => {
+      await main();
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should return expected values with user options', async () => {
+      await main([
+        '-r',
+        'us-east-1',
+        '-l',
+        '10',
+        '-l',
+        '11',
+        '-d',
+        'Linux/UNIX (Amazon VPC)',
+        '-i',
+        'c5.large',
+        'c4.xlarge',
+        '-p',
+        '0.05',
+      ]);
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should return expected values with wildcard product descriptions', async () => {
+      await main(['-r', 'us-east-1', '-l', '10', '-d', 'linux']);
+      await main(['-r', 'us-east-1', '-l', '10', '-d', 'windows']);
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should return expected values with instance families and sizes', async () => {
+      await main(['-f', 'c5', '-s', 'large']);
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should handle invalid usage of instance families and sizes option', async () => {
+      let caughtError = false;
+
+      try {
+        await main(['-f', 'c5']);
+      } catch (error) {
+        caughtError = true;
+      }
+      expect(caughtError).toBeTrue();
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should handle invalid usage of accessKeyId and secretAccessKey', async () => {
+      let caughtError = false;
+      try {
+        await main(['--accessKeyId', 'rand']);
+      } catch (error) {
+        caughtError = true;
+      }
+      expect(caughtError).toBeTrue();
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+
+    it('should handle invalid credentials error', async () => {
+      let caughtError = false;
+      try {
+        await main(['--accessKeyId', 'rand', '--secretAccessKey', 'rand']);
+      } catch (error) {
+        caughtError = true;
+      }
+      expect(caughtError).toBeTrue();
+      expect(consoleMockCallJoin()).toMatchSnapshot();
+    });
+  });
+
+  describe('test by spawnSync', () => {
+    const cliJsPath = resolve(__dirname, '../dist/cli.js');
+    it('should stdout help screen', () => {
+      const s = spawnSync('node', [cliJsPath, '--help'], { encoding: 'utf-8' });
+      expect(s.stdout).toMatchSnapshot();
+    });
+  });
+});