test(format-commit-message): add failing test cases

test.js

@@ -9,6 +9,7 @@ var stream = require('stream')
 var mockGit = require('mock-git')
 var mockery = require('mockery')
 var semver = require('semver')
+var formatCommitMessage = require('./lib/format-commit-message')
 var cli = require('./command')
 var standardVersion = require('./index')
 
@@ -101,6 +102,18 @@ function getPackageVersion () {
   return JSON.parse(fs.readFileSync('package.json', 'utf-8')).version
 }
 
+describe('format-commit-message', function () {
+  it('works for no %s', function () {
+    formatCommitMessage('chore(release): 1.0.0', '1.0.0').should.equal('chore(release): 1.0.0')
+  })
+  it('works for one %s', function () {
+    formatCommitMessage('chore(release): %s', '1.0.0').should.equal('chore(release): 1.0.0')
+  })
+  it('works for two %s', function () {
+    formatCommitMessage('chore(release): %s \n\n* CHANGELOG: https://github.com/conventional-changelog/standard-version/blob/v%s/CHANGELOG.md', '1.0.0').should.equal('chore(release): 1.0.0 \n\n* CHANGELOG: https://github.com/conventional-changelog/standard-version/blob/v1.0.0/CHANGELOG.md')
+  })
+})
+
 describe('cli', function () {
   beforeEach(initInTempFolder)
   afterEach(finishTemp)