我在用摩卡和巴贝尔编译器运行伊斯坦布尔时遇到了一些问题.
我的所有测试都运行得很好，但在所有测试完成后，它向我显示了以下消息:
No coverage information was collected, exit without writing coverage information
它也没有制作任何报道报告.
我正在运行的命令是:
NODE_ENV=test istanbul cover _mocha -- --require babel-core/register --recursive
该项目位于GitHub上:
知道会是什么吗？
使用巴别塔6.x、 假设我们有test/pad.spec.js个文件:
import pad from '../src/assets/js/helpers/pad';
import assert from 'assert';
describe('pad', () => {
it('should pad a string', () => {
assert.equal(pad('foo', 4), '0foo');
});
});
安装一堆垃圾:
$ npm install babel-istanbul babel-cli babel-preset-es2015 mocha
创建一个.babelrc:
{
"presets": ["es2015"]
}
运行测试:
$ node_modules/.bin/babel-node node_modules/.bin/babel-istanbul cover \
node_modules/.bin/_mocha -- test/pad.spec.js
pad
✓ should pad a string
1 passing (8ms)
=============================================================================
Writing coverage object [/Volumes/alien/projects/forked/react-flux-puzzle/coverage/coverage.json]
Writing coverage reports at [/Volumes/alien/projects/forked/react-flux-puzzle/coverage]
=============================================================================
=============================== Coverage summary ===============================
Statements : 100% ( 4/4 )
Branches : 66.67% ( 4/6 ), 1 ignored
Functions : 100% ( 1/1 )
Lines : 100% ( 3/3 )
================================================================================
UPDATE:我成功地使用了nyc(消耗istanbul)，而不是istanbul/babel-istanbul.这就不那么复杂了.要try 它:
安装东西(可以删除babel-istanbul和babel-cli):
$ npm install babel-core babel-preset-es2015 mocha nyc
如上图所示创建.babelrc.
执行以下命令:
$ node_modules/.bin/nyc --require babel-core/register node_modules/.bin/mocha \
test/pad.spec.js
...这应该会给你类似的结果.默认情况下，它将覆盖率信息放入.nyc-output/，并在控制台中打印一个漂亮的文本摘要.
Note:将命令放入package.json的scripts字段时，可以从这些命令中删除node_modules/.bin/.