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power-assert-js/espower-coffee: power-assert instrumentor for CoffeeScript

power-assert instrumentor for CoffeeScript

espower-coffee is a Node.js module loader that instruments power-assert feature into target CoffeeScript sources on the fly.

Pull-requests, issue reports and patches are always welcomed. See power-assert project for more documentation.

Given test/demo_test.coffee

assert = require 'assert'

class Person
  constructor: (name, age) ->
    @name = name
    @age = age

describe "various types", ->
  beforeEach ->
    @types = [
      "string"
      98.6
      true
      false
      null
      `undefined`
      [
        "nested"
        "array"
      ]
      {
        object: true
      }
      NaN
      Infinity
      /^not/
      new Person("alice", 3)
    ]

  it "demo", ->
    index = @types.length - 1
    bob = new Person("bob", 5)
    assert @types[index].name is bob.name

Run mocha with --require 'espower-coffee/guess'

$ mocha --require 'espower-coffee/guess' test/demo_test.coffee

  ․

  0 passing (15ms)
  1 failing

  1) various types demo:
     AssertionError: # /path/to/test/demo_test.coffee:33

assert(this.types[index].name === bob.name)
            |    ||      |    |   |   |
            |    ||      |    |   |   "bob"
            |    ||      |    |   Person{name:"bob",age:5}
            |    ||      |    false
            |    |11     "alice"
            |    Person{name:"alice",age:3}
            ["string",98.6,true,false,null,undefined,#Array#,#Object#,NaN,Infinity,/^not/,#Person#]

--- [string] bob.name
+++ [string] this.types[index].name
@@ -1,3 +1,5 @@
-bob
+alice

    at Decorator.concreteAssert (/path/to/node_modules/power-assert/node_modules/empower/lib/decorator.js:63:21)
    at /path/to/node_modules/power-assert/node_modules/empower/lib/decorate.js:44:26
    at powerAssert (/path/to/node_modules/power-assert/node_modules/empower/index.js:57:32)
    at Context.<anonymous> (/path/to/test/demo_test.coffee:1:1)

$ 

See the power-assert output appears!

$ npm install --save-dev espower-coffee power-assert

If your tests are located on 'test/**/*.coffee', just run mocha with --require 'espower-coffee/guess'

$ mocha --require 'espower-coffee/guess' test/**/*.coffee

You can set test directory in your package.json

{
    "name": "your-module",
    "description": "Your module",
    "version": "0.0.1",
    "directories": {
        "test": "spec/"
    },
...
}

Then, run mocha with --require 'espower-coffee/guess'

$ mocha --require 'espower-coffee/guess' spec/**/*.coffee

Note: 'espower-coffee/guess' is inspired by intelli-espower-loader

If you want to configure more explicitly, put espower-coffee-loader.js somewhere in your project.

require('espower-coffee')({
    // directory where match starts with
    cwd: process.cwd(),

    // glob pattern using minimatch module
    pattern: '{src,test}/**/*.coffee',

    // options for espower module
    espowerOptions: {
        patterns: [
            'assert(value, [message])',
            'assert.ok(value, [message])',
            'assert.equal(actual, expected, [message])',
            'assert.notEqual(actual, expected, [message])',
            'assert.strictEqual(actual, expected, [message])',
            'assert.notStrictEqual(actual, expected, [message])',
            'assert.deepEqual(actual, expected, [message])',
            'assert.notDeepEqual(actual, expected, [message])',
            'assert.deepStrictEqual(actual, expected, [message])',
            'assert.notDeepStrictEqual(actual, expected, [message])'
        ]
    }
});

Then, run mocha with --require option

$ mocha --require ./path/to/espower-coffee-loader spec/unit/some_test.coffee

We support Node under maintenance. In other words, we stop supporting old Node version when their maintenance ends.

This means that any other environment is not supported.

NOTE: If espower-coffee works in any of the unsupported environments, it is purely coincidental and has no bearing on future compatibility. Use at your own risk.

See CHANGELOG

• Takuto Wada

Licensed under the MIT license.

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