test: adds basic coverage for --preset flag and CHANGELOG output (#723)

closes #720

test/preset.spec.js

@@ -0,0 +1,52 @@
+/* global describe it beforeEach, afterEach */
+
+const shell = require('shelljs')
+const fs = require('fs')
+
+require('chai').should()
+
+function exec (opt) {
+  const cli = require('../command')
+  opt = cli.parse(`standard-version ${opt} --silent`)
+  opt.skip = { commit: true, tag: true }
+  return require('../index')(opt)
+}
+
+describe('presets', () => {
+  beforeEach(function () {
+    shell.rm('-rf', 'tmp')
+    shell.config.silent = true
+    shell.mkdir('tmp')
+    shell.cd('tmp')
+    shell.exec('git init')
+    shell.exec('git config commit.gpgSign false')
+    shell.exec('git config core.autocrlf false')
+    shell.exec('git commit --allow-empty -m "initial commit"')
+    shell.exec('git commit --allow-empty -m "feat: A feature commit."')
+    shell.exec('git commit --allow-empty -m "perf: A performance change."')
+    shell.exec('git commit --allow-empty -m "chore: A chore commit."')
+    shell.exec('git commit --allow-empty -m "ci: A ci commit."')
+    shell.exec('git commit --allow-empty -m "custom: A custom commit."')
+  })
+
+  afterEach(function () {
+    shell.cd('../')
+    shell.rm('-rf', 'tmp')
+  })
+
+  it('Conventional Commits (default)', async function () {
+    await exec()
+    const content = fs.readFileSync('CHANGELOG.md', 'utf-8')
+    content.should.contain('### Features')
+    content.should.not.contain('### Performance Improvements')
+    content.should.not.contain('### Custom')
+  })
+
+  it('Angular', async function () {
+    await exec('--preset angular')
+    const content = fs.readFileSync('CHANGELOG.md', 'utf-8')
+    content.should.contain('### Features')
+    content.should.contain('### Performance Improvements')
+    content.should.not.contain('### Custom')
+  })
+})