Improve code quality and write tests

node_modules/codecov/test/services/teamcity.test.js

@@ -0,0 +1,22 @@
+var teamcity = require('../../lib/services/teamcity')
+
+describe('TeamCity CI Provider', function() {
+  it('can detect teamcity', function() {
+    process.env.TEAMCITY_VERSION = '8910'
+    expect(teamcity.detect()).toBe(true)
+  })
+
+  it('can get teamcity env info get_commit_status', function() {
+    process.env.TEAMCITY_VERSION = '8910'
+    process.env.BUILD_VCS_NUMBER = '4567'
+    process.env.BRANCH_NAME = 'ABranch'
+    process.env.BUILD_NUMBER = '1234'
+
+    expect(teamcity.configuration()).toEqual({
+      service: 'teamcity',
+      commit: '4567',
+      branch: 'ABranch',
+      build: '1234',
+    })
+  })
+})