如何以编程方式和异步方式定义 Mocha 测试？

Question

我正在尝试将一些以编程方式生成的测试与 Node.js 中的 Mocha 测试框架集成。

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var Promise = require(\'promise\');\n\nvar resolved = Promise.resolve(true);\n\nsuite("Synchronously defined suite", function() {\n  test("Synchronously defined test", function() {\n    return resolved;\n  });\n});\n\ndefer(function() {\n  suite("Asynch DEFINED test", function() {\n    suiteSetup(function() {\n      console.log("Asynch setupSuite running...");\n    });\n\n    test("Asynch Test", function() {\n      console.log("Async test running...");\n      return resolved;\n    });\n  });\n});\n\nfunction defer(fn) {\n  console.log("Calling defer...");\n  setTimeout(fn, 100);\n}\n

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当我执行这个时，我得到：

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$ mocha --ui tdd nested-test.js \nCalling defer...\n\n\n  Synchronously defined suite\n    \xe2\x9c\x93 Synchronously defined test\n\n\n  1 passing (4ms)\n

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似乎 Mocha 要求所有“套件”函数在模块加载时同步执行 - 延迟调用似乎被（默默地）忽略（或者程序在调用它们之前退出）。

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Answer 1

这就是我想出的办法。它不在 mocha 下运行，而是作为一个独立的节点程序运行：

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var Promise = require(\'promise\');\nvar Mocha = require(\'mocha\');\n\nvar resolved = Promise.resolve(true);\nvar rejected = Promise.reject(new Error("Failing test."));\n\ndefer(function() {\n  console.log("Programmatic test suite creation.");\n  var suite = new Mocha.Suite("Programatic Suite");\n  var runner = new Mocha.Runner(suite);\n  var reporter = new Mocha.reporters.Spec(runner);\n\n  suite.addTest(new Mocha.Test("My test", function() {\n    return resolved;\n  }));\n\n  suite.addTest(new Mocha.Test("My (failing) test", function() {\n    return rejected;\n  }));\n\n  runner.run();\n});\n\nfunction defer(fn) {\n  setTimeout(fn, 100);\n}\n

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运行时输出：

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$ node deferred-test.js \nProgrammatic test suite creation.\n\nProgramatic Suite\n  \xe2\x9c\x93 My test\n  1) My (failing) test\n\n  1 passing (7ms)\n  1 failing\n\n  1) Programatic Suite My (failing) test:\n     Error: Failing test.\n      at Object.<anonymous> (deferred-test.js:5:31)\n      at node.js:935:3\n

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不过，我希望能够将此测试包含在我的应用程序中的所有（静态定义的）摩卡运行测试套件中。

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