javascript - start - TypeError: expect(…).to.be no es una función

karma start

Question

Estoy configurando mi marco Karma y mocha con gruñido en mi proyecto. Cuando estoy ejecutando karma start, obtengo el error que se menciona a continuación.

Recibo este error en mi consola mientras ejecuto el comando: Karma start

TypeError: expect(...).to.be is not a function

Mi karma.confjs

// Karma configuration
// Generated on Fri Nov 27 2015 11:48:47 GMT+0530 (India Standard Time)

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'', ''chai''],


    // list of files / patterns to load in the browser
    files: [
      ''bower_components/angular/angular.js'',
      ''bower_components/angular-mocks/angular-mocks.js'',
      ''app/*.js'',
      // ''test/specs/*.js'',
      ''test/specs/array.js'',
      // ''test/specs/myCtlr-spec.js'',
      //''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 results reporter to use
    // possible values: ''dots'', ''progress''
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: [''progress'',''coverage''],

    preprocessors: {
        ''src/app/**/*.js'': [''coverage'']
    },
    coverageReporter: {
        type: ''lcov'',
        dir: ''coverage/''
    },

    // 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_INFO,


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


    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    // browsers: [''PhantomJS'', ''Chrome''],
    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 simultanous
    concurrency: Infinity
  })
}

Mi prueba array.js

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

describe("Mocha: The ''toBe'' matcher compares with ===", function() {
  it("and has a positive case", function() {
    expect(true).to.be(true);
  });

  it("and can have a negative case", function() {
    expect(false).not.to.be(true);
  });
});

Por favor, sugiera lo que me falta.

Answer 1

expect(true).to.be.equal(true) escribir expect(true).to.be.equal(true) the be es una cadena (objeto) no una función. O podrías escribir:

expect(true).to.be.true;
expect(false).to.be.false;