javascript - 用karma测试，怎么也看不到测试结果。大家帮忙看看是哪里配置不对。

Question

reporter先后用默认的progress、安装的mocha、spec都不行。

test/sayhi.spec.js：

var chai = require('chai');
var expect = chai.expect;

describe('sayhi', function () {
    it('say hi to liudehua', function () {
        expect(true).to.equal(true);
    });
});

karma.conf.js

// Karma configuration
// Generated on Mon Dec 12 2016 00:15:11 GMT+0800 (中国标准时间)

module.exports = function(config) {
    config.set({

        // base path that will be used to resolve all patterns (eg. files, exclude)
        basePath: '',


        // frameworks to use
        // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
        frameworks: ['mocha', 'browserify'],


        // list of files / patterns to load in the browser
        files: [
            'test/**/*.js'
        ],


        // list of files to exclude
        exclude: [],


        // preprocess matching files before serving them to the browser
        // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
        preprocessors: {
            'test/**/*.js': ['browserify']
        },

        browserify: {
            debug: false
        },


        // test results reporter to use
        // possible values: 'dots', 'progress'
        // available reporters: https://npmjs.org/browse/keyword/karma-reporter
        reporters: ['mocha'],

        mochaReporter: {
            showDiff: true
        },


        // web server port
        port: 9876,


        // enable / disable colors in the output (reporters and logs)
        colors: true,


        // level of logging
        // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
        logLevel: config.LOG_DEBUG,


        // enable / disable watching file and executing tests whenever any file changes
        autoWatch: false,


        // start these browsers
        // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
        browsers: ['Chrome'],


        // Continuous Integration mode
        // if true, Karma captures browsers, runs the tests and exits
        singleRun: false,

        // Concurrency level
        // how many browser should be started simultaneous
        concurrency: Infinity
    })
}