我尝试生成 HTML 覆盖率报告，但它不包含我期望的输出。也许我在这里错了，但它应该只显示从规范文件调用的那些行和方法，对吧？

不知怎的，它没有。

更新:

我创建了一个存储库来提供一个工作示例，概述了问题:

https://github.com/gearsdigital/stunning-octo-train

这是我的(测试)项目设置。如果需要，我可以将它推送到 GitHub 存储库，因为我不知道如何设置 JSFiddle 来运行此代码。

长话短说

有一个生成 HTML 覆盖率报告的过程。此报告显示代码已涵盖，但显然未涵盖，因为没有可用的测试。

业力.conf.js:

var webpack = require('webpack');
var path = require('path');

// Reference webpack.config.js, don't repeat it!
var webpackConfig = require('./webpack.config.js');

// The entry point from the referenced Webpack configuration has to be
// removed or tests will fail in weird and inscrutable ways.
// Easy enough, just define an empty entry object (null won't work).
webpackConfig.entry = {};
webpackConfig.module = {
    preLoaders: [
        {
            test: /\.js$/,
            // files within these directories should be excluded
            // for babel processing
            exclude: /(node_modules)/,
            loaders: ['babel?cacheDirectory']
        },
        {
            test: /\.js$/,
            include: /(src\/js)/,
            exclude: /(vendor)/,
            loaders: ['isparta']
        }
    ]
};

/**
 * Karma configuration
 * @param config
 */
module.exports = function (config) {
    config.set({
        browsers: ['PhantomJS'],
        coverageReporter: {
            dir: 'test-results',
            reporters: [
                {type: 'text-summary'},
                {type: 'html', subdir: 'coverage'}
            ]
        },
        files: [
            'webpack.test.config.js'
        ],
        frameworks: [
            'jasmine'
        ],
        preprocessors: {
            'webpack.test.config.js': ['webpack']
        },
        reporters: ['spec', 'coverage'],
        webpack: webpackConfig
    });
};

webpack.config.js:

var webpack = require('webpack');
var path = require('path');

module.exports = {
    plugins: [
        new webpack.ProvidePlugin({
            $: "jquery",
            jQuery: "jquery",
            "window.jQuery": "jquery"
        })
    ]
};

webpack.test.config.js:

// make sure the file name regexp matches your test files.
var testsContext = require.context('./tests', true, /\.spec\.js$/);
testsContext.keys().forEach(testsContext);

// make sure the file name regexp matches your test files.
var srcContext = require.context('./src/js', true, /\.js$/);
srcContext.keys().forEach(srcContext);

bootstrap.js:

import {Calculator} from './modules/Calculator';
let c = new Calculator();
c.add(1,2); // 3

计算器.js:

export class Calculator {
    add(op1, op2) {
        return op1 + op2;
    }

    sub(op1, op2) {
        if (typeof op1 !== 'number') {
            return false;
        }
        return op1 - op2;
    }

    mul(op1, op2) {
        return op1 * op2;
    }

    div(op1, op2) {
        return op1 / op2;
    }
}

bootstrap.spec.js:

import {Calculator} from '../src/js/modules/Calculator';

describe('Calculator', function () {

    it('should return 10', function () {
        expect(true).toBe(false);
    });

});

生成的报告:

我预计 add() 会被发现，因为它不会在任何测试中调用，而是在 bootstrap.js 中调用。

项目结构:

最佳答案

src/js/bootstrap.js 被加载；这意味着这些行得到执行。

import {Calculator} from './modules/Calculator';
let c = new Calculator();
c.add(1,2); // 3

我猜这个 block 是罪魁祸首:

    {
        test: /\.js$/,
        include: /(src\/js)/,
        exclude: /(vendor)/,
        loaders: ['isparta']
    }

难道我的代码不应该只在测试期间运行吗？

简短的回答是否定的。

当您导入模块时，任何不在闭包/函数/方法内的内容都可能被覆盖。

// this will get coverage; because it is top-level code outside a function block
var dummy = null;

export class Calculator {
    add(op1, op2) {
        // this will get coverage only if you call explicitly the function.
        return op1 + op2;
    }
}

// this will get coverage.
var c = new Calculator();
// and now, Calculator.add will get coverage.
c.add(1,2); // 3

关于javascript - Karma-Coverage 报告显示代码被覆盖(显然没有被覆盖)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34291595/