Question

如何通过 NodeJS和Mocha 执行具有不同结构的不同测试用例。

继续前进我打算整合 Selenium + NodeJS + Mocha

我刚开始用Mocha探索NodeJS并需要一些帮助。

已安装node.js：
```
C:\Users\AtechM_03>node -v
v6.11.2
```
已安装npm：
```
C:\Users\AtechM_03>npm -v
3.10.10
```
根据此link配置nodeclipse，我的项目结构如下：

根据this link在默认位置（通过命令行）安装Mocha。

C:\Users\AtechM_03>npm install -g mocha
C:\Users\AtechM_03\AppData\Roaming\npm\mocha -> C:\Users\AtechM_03\AppData\Roaming\npnode_modules\mocha\bin\mocha
C:\Users\AtechM_03\AppData\Roaming\npm\_mocha -> C:\Users\AtechM_03\AppData\Roaming\n\node_modules\mocha\bin\_mocha
C:\Users\AtechM_03\AppData\Roaming\npm
`-- mocha@3.5.3

跟随this link在NodeJS中编写一个集成Mocha的程序。
在test空格中创建了一个名为NodeProject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>

package.json已在项目范围内生成，即在C:\Users\AtechM_03\LearnAutmation\NodeProject下生成如下：

    {
      "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"
    }

将代码添加到test.js，如下所示：

        // 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);
              });
          });

        });

从项目空间执行成功npm test：

        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)

跟随this link在NodeJS中编写第二个集成Mocha的程序。
在temperature空间中创建了一个名为NodeProject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称test
在测试文件夹中，创建了一个名为test.js

将之前的package.json移至子目录并执行npm init以再次以交互方式创建新的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)

新package.json的创建方式如下：

        {
          "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"
        }

当前的temperature测试用例如下所示：

试图从项目空间通过npm test执行第二个程序，但它仍然按如下方式执行第一个程序：

    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 passing (20ms)）但我的app.js根本没有被调用。

有人可以指导/建议我在这里做错了吗？

任何建议/指南/指针都会有所帮助。

更新

截至目前，我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this website我关注我预计错误为0 passing (20ms)

Answer 1

你有很长的描述，但我从中提取的是你基本上有这样的结构：

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

然后你进入NodeProject并运行摩卡。默认情况下，Mocha将仅在调用它的同一目录中查找test。所以它不会寻找temperature/test。如果你想让Mocha在temperature/test中运行测试，你必须明确告诉Mocha。例如，这将起作用：

mocha test temperature/test

我会在这里解决一个常见的误解，因为我经常看到人们犯了错误：仅使用--recursive标志是不够的。如果您使用此标志，那么在 Mocha之后已经确定了要在其中查找测试的目录，它将以递归方式查看它们。但是，它不会改变Mocha如何识别要在其中查找测试的目录。具体来说，如果您使用mocha --recursive，它仍然只会查看test，它会显示在test的子目录中。这不会使它看起来temperature/test。如果您确实在test和temperature/test中有子目录，则可以执行以下操作：

mocha --recursive test temperature/test

如何通过NodeJS和Mocha

问题：

更新

1 个答案: