在调研了几个库之后,我选用了 coffee-coverage 和 mocha 这个两个库。
"devDependencies": {
"mocha": "^1.21.5",
"chai": "^1.9.2",
"coffee-coverage": "^0.4.2"
}
在 test/support/env.coffee
引入 coffee-coverage:
if process.env.COV_TEST == 'true'
require('coffee-coverage').register
path: 'relative'
basePath: "#{__dirname}/../.."
exclude: ['test', 'node_modules', '.git', 'sample', 'static']
initAll: true
coffee-coverage 的文档上写的 exlude 示例是 exclude: ['/test', '/node_modules', '/.git']
, 但我在被坑了一个半小时之后才发现前面不能加斜杠.....
我发了个 Pull Request, 目前还没被处理。
在 test/app.coffee
里写第一个测试,
describe 'app', ->
it 'should can startup', ->
# 在我的机器上启动需要差不多 15 秒时间.....
@timeout 20000
require '../../app'
mocha 默认的测试报告只会显示测试的通过情况,不会显示测试覆盖率,因此我们要拓展一下 mocha 默认的测试报告,在 test/support/reporter-cov-summary.js
,
var fs = require('fs');
var util = require ('util');
var Spec = require('mocha/lib/reporters/spec');
exports = module.exports = CovSummary;
function CovSummary(runner) {
Spec.call(this, runner);
runner.on('end', report);
}
function report() {
var cov = global._$jscoverage || {};
var files = Object.keys(cov);
var covered_lines = 0;
var total_lines = 0;
files.forEach(function(file) {
cov[file].forEach(function(line) {
if(line !== undefined) {
total_lines ++;
if (line !== 0) {
covered_lines ++;
}
}
});
});
var covered = (covered_lines / total_lines * 100).toFixed(1);
console.log(util.format('Coverage Summary: %s lines of %s lines, %s% covered \n', covered_lines, total_lines, covered));
}
CovSummary.prototype.__proto__ = Spec.prototype;
这个文件是用 JavaScript 写的,我实在没搞清楚 mocha 怎么直接用 Coffee 的测试报告;它会在测试运行结束后输出一个覆盖率概要,类似于:
Coverage Summary: 305 lines of 2056 lines, 14.8% covered
在 package.json
中加上 scripts:
"scripts": {
"start": "./node_modules/.bin/coffee app.coffee",
"test": "COV_TEST=true ./node_modules/.bin/mocha --compilers coffee:coffee-script/register --require test/support/env --reporter test/support/reporter-cov-summary.js -- test",
"test-only": "./node_modules/.bin/mocha --compilers coffee:coffee-script/register --require test/support/env -- test",
"test-cov-html": "COV_TEST=true ./node_modules/.bin/mocha --compilers coffee:coffee-script/register --require test/support/env --reporter html-cov -- test > coverage-reporter.html"
},
start
是启动应用,test
是运行测试和覆盖率报告,test-only
只运行测试,test-cov-html
会生成 HTML 格式的测试覆盖率报告。
然后还要改一下 .gitinore
, 加上 /coverage-reporter.html
.
最后是 .travis.yaml
,
language: node_js
node_js:
- "0.10"
差不多就是这样。