Javascript 如何通过NodeJS和Mocha执行不同结构的不同测试用例

如何通过

NodeJS

和

Mocha

执行不同结构的不同测试用例

向前迈进，我打算整合Selenium+

+

我刚开始用摩卡探索NodeJS，需要一些帮助

已安装的

node.js

：

C:\Users\AtechM_03>node -v
v6.11.2

已安装的

npm

：

C:\Users\AtechM_03>npm -v
3.10.10

按此配置

nodeclipse

，我的项目结构如下：

按照在默认位置（通过命令行）安装

Mocha

接着在NodeJS中编写了一个集成Mocha的程序

在

NodeProject

空间中创建了名为

test

的目录

在

test

文件夹中创建了一个名为

test.js的文件

执行

npm init

以交互方式创建

package.json

文件

    C:\Users\AtechM_03>cd C:\Users\AtechM_03\LearnAutmation\NodeProject

    C:\Users\AtechM_03\LearnAutmation\NodeProject>npm init
    This utility will walk you through creating a package.json file.
    It only covers the most common items, and tries to guess sensible defaults.

    See `npm help json` for definitive documentation on these fields
    and exactly what they do.

    Use `npm install <pkg> --save` afterwards to install a package and
    save it as a dependency in the package.json file.

    Press ^C at any time to quit.
    name: (NodeProject) test
    version: (1.0.0) 1.0.0
    description: test123
    entry point: (index.js) test.js
    test command: (mocha) mocha
    git repository:
    keywords:
    author: debanjan
    license: (ISC)
    About to write to C:\Users\AtechM_03\LearnAutmation\NodeProject\package.json:

    {
      "name": "test",
      "version": "1.0.0",
      "description": "test123",
      "main": "test.js",
      "directories": {
        "test": "test"
      },
      "dependencies": {
        "g": "^2.0.1",
        "selenium-webdriver": "^3.5.0"
      },
      "devDependencies": {
        "mocha": "^3.5.3"
      },
      "scripts": {
        "test": "mocha"
      },
      "author": "debanjan",
      "license": "ISC"
    }


    Is this ok? (yes)

C:\Users\AtechM_03\LearnAutmation\NodeProject>

将代码添加到

test.js

，如下所示：

    {
      "name": "test",
      "version": "1.0.0",
      "description": "test123",
      "main": "test.js",
      "directories": {
        "test": "test"
      },
      "dependencies": {
        "g": "^2.0.1",
        "selenium-webdriver": "^3.5.0"
      },
      "devDependencies": {
        "mocha": "^3.5.3"
      },
      "scripts": {
        "test": "mocha"
      },
      "author": "debanjan",
      "license": "ISC"
    }

        // Require the built in 'assertion' library
        var assert = require('assert');
        // Create a group of tests about Arrays
        describe('Array', function() {
          // Within our Array group, Create a group of tests for indexOf
          describe('#indexOf()', function() {
            // A string explanation of what we're testing
            it('should return -1 when the value is not present', function(){
              // Our actual test: -1 should equal indexOf(...)
              assert.equal(-1, [1,2,3].indexOf(4));
            });
          });

        //Create a test suite (group) called Math
          describe('Math', function() {
              // Test One: A string explanation of what we're testing
              it('should test if 3*3 = 9', function(){
            // Our actual test: 3*3 SHOULD EQUAL 9
            assert.equal(9, 3*3);
              });
              // Test Two: A string explanation of what we're testing
              it('should test if (3-4)*8 = -8', function(){
            // Our actual test: (3-4)*8 SHOULD EQUAL -8
            assert.equal(-8, (3-4)*8);
              });
          });

        });

        {
          "name": "temperature",
          "version": "1.0.0",
          "description": "temp",
          "main": "app.js",
          "directories": {
            "test": "test"
          },
          "dependencies": {
            "g": "^2.0.1",
            "selenium-webdriver": "^3.5.0"
          },
          "devDependencies": {
            "mocha": "^3.5.3"
          },
          "scripts": {
            "test": "mocha"
          },
          "author": "debanjanb",
          "license": "ISC"
        }

    C:\Users\AtechM_03\LearnAutmation\NodeProject>npm test

    > temperature@1.0.0 test C:\Users\AtechM_03\LearnAutmation\NodeProject
    > mocha



      Array
        #indexOf()
          v should return -1 when the value is not present
        Math
          v should test if 3*3 = 9
          v should test if (3-4)*8 = -8


      3 passing (18ms)

从成功运行的项目空间执行

npm测试

：

        C:\Users\AtechM_03\LearnAutmation\NodeProject>npm test

        > temperature@1.0.0 test C:\Users\AtechM_03\LearnAutmation\NodeProject
        > mocha



          Array
            #indexOf()
              v should return -1 when the value is not present
            Math
              v should test if 3*3 = 9
              v should test if (3-4)*8 = -8


          3 passing (18ms)

接着在NodeJS中编写了第二个集成Mocha的程序

在

NodeProject

空间中创建了一个名为

temperature

的单独目录

在

temperature

目录中创建了一个名为

app.js

的文件和一个文件夹名

test

在test文件夹中，创建了一个名为

test.js的文件

将以前的

package.json

移动到子目录，并执行

npm init

以交互方式再次创建新的

package.json

文件

        C:\Users\AtechM_03>cd C:\Users\AtechM_03\LearnAutmation\NodeProject

        C:\Users\AtechM_03\LearnAutmation\NodeProject>npm init
        This utility will walk you through creating a package.json file.
        It only covers the most common items, and tries to guess sensible defaults.

        See `npm help json` for definitive documentation on these fields
        and exactly what they do.

        Use `npm install <pkg> --save` afterwards to install a package and
        save it as a dependency in the package.json file.

        Press ^C at any time to quit.
        name: (NodeProject) temperature
        version: (1.0.0) 1.0.0
        description: temp
        entry point: (index.js) app.js
        test command: (mocha) mocha
        git repository:
        keywords:
        author: debanjanb
        license: (ISC)
        About to write to C:\Users\AtechM_03\LearnAutmation\NodeProject\package.json:

        {
          "name": "temperature",
          "version": "1.0.0",
          "description": "temp",
          "main": "app.js",
          "directories": {
            "test": "test"
          },
          "dependencies": {
            "g": "^2.0.1",
            "selenium-webdriver": "^3.5.0"
          },
          "devDependencies": {
            "mocha": "^3.5.3"
          },
          "scripts": {
            "test": "mocha"
          },
          "author": "debanjanb",
          "license": "ISC"
        }


    Is this ok? (yes)

当前

温度
测试用例如下所示：

试图通过

npm test

从项目空间执行第二个程序，但仍按如下方式执行第一个程序：

    {
      "name": "test",
      "version": "1.0.0",
      "description": "test123",
      "main": "test.js",
      "directories": {
        "test": "test"
      },
      "dependencies": {
        "g": "^2.0.1",
        "selenium-webdriver": "^3.5.0"
      },
      "devDependencies": {
        "mocha": "^3.5.3"
      },
      "scripts": {
        "test": "mocha"
      },
      "author": "debanjan",
      "license": "ISC"
    }

        // Require the built in 'assertion' library
        var assert = require('assert');
        // Create a group of tests about Arrays
        describe('Array', function() {
          // Within our Array group, Create a group of tests for indexOf
          describe('#indexOf()', function() {
            // A string explanation of what we're testing
            it('should return -1 when the value is not present', function(){
              // Our actual test: -1 should equal indexOf(...)
              assert.equal(-1, [1,2,3].indexOf(4));
            });
          });

        //Create a test suite (group) called Math
          describe('Math', function() {
              // Test One: A string explanation of what we're testing
              it('should test if 3*3 = 9', function(){
            // Our actual test: 3*3 SHOULD EQUAL 9
            assert.equal(9, 3*3);
              });
              // Test Two: A string explanation of what we're testing
              it('should test if (3-4)*8 = -8', function(){
            // Our actual test: (3-4)*8 SHOULD EQUAL -8
            assert.equal(-8, (3-4)*8);
              });
          });

        });

        {
          "name": "temperature",
          "version": "1.0.0",
          "description": "temp",
          "main": "app.js",
          "directories": {
            "test": "test"
          },
          "dependencies": {
            "g": "^2.0.1",
            "selenium-webdriver": "^3.5.0"
          },
          "devDependencies": {
            "mocha": "^3.5.3"
          },
          "scripts": {
            "test": "mocha"
          },
          "author": "debanjanb",
          "license": "ISC"
        }

    C:\Users\AtechM_03\LearnAutmation\NodeProject>npm test

    > temperature@1.0.0 test C:\Users\AtechM_03\LearnAutmation\NodeProject
    > mocha



      Array
        #indexOf()
          v should return -1 when the value is not present
        Math
          v should test if 3*3 = 9
          v should test if (3-4)*8 = -8


      3 passing (18ms)

问题: 我知道我的第二个程序

app.js

不完整，执行它会显示错误（例如

0通过（20ms）

），但我的

app.js

根本没有被调用

有人能告诉我我做错了什么吗

任何建议/指南/指针都会有所帮助

更新： 到目前为止，

app.js

的当前代码不完整，包含以下代码：

        cToF = function(celsius) {
          if(!Number.isInteger(celsius)) return undefined;
          return celsius * 9 / 5 + 32;
        }

        fToC = function(fahrenheit) {
          if(!Number.isInteger(fahrenheit)) return undefined;
          return (fahrenheit - 32) * 5 / 9;
        }

---

根据我下面的内容，我预计会出现一个错误，即

0通过（20ms）

您有一个很长的描述，但我从中提取的东西是，您基本上有这样一个结构：

NodeProject
├── temperature
│   └── test
└── test

然后进入

NodeProject

并运行Mocha。默认情况下，Mocha将只在调用它的同一目录中查找

test

。因此它不会查找

温度/测试
。如果你想让摩卡在
温度/测试中运行测试，你必须明确告诉摩卡。例如，这将起作用：

mocha test temperature/test

我将在这里讨论一个常见的误解，因为我经常看到人们犯错误：仅仅使用
--recursive
标志是不够的。如果您使用这个标志，那么在Mocha确定了要在其中查找测试的目录之后，它将递归地查找这些目录。然而，它并没有改变Mocha如何识别在其中查找测试的目录。具体地说，如果使用
mocha--recursive
，它仍然只会在
test
中查找，并且会在
test
的子目录中查找。这不会使其在
温度/测试中显示。如果在
test
和
temperature/test
中确实有子目录，则可以执行以下操作：

mocha --recursive test temperature/test

你能展示你的app.js有什么内容吗？@HarshPatel根据你的评论更新了问题。你的app.js文件中没有写描述或it方法/函数。因此，它不会向控制台显示任何输出。但它肯定会执行。