• http://github.com/ndp/ayudante
• Continuous Integration at http://runcoderun.com/ndp/ayudante

Collection of useful helpers for writing unit/functional/integration testunit tests.

This uses method_missing to provide additional functions for each of your
fixtures:

This asserts that the lists are the same size and have the same items. Any
difference is reported.

Example:

fixtures :candy_bars
assert_list_of_candy_bars [:almond_joys, :m_and_ms], CandyBar.find_nutty()

This asserts that the lists are the same size and have the same items, but order
is ignored.

Example:

assert_set_of_candy_bars [:almond_joys, :m_and_ms], CandyBar.find_nutty()

This asserts that all the items are found in the second parameter, but order
is ignored.

Example:

assert_contains_candy_bars [:almond_joys, :m_and_ms], CandyBar.find_nutty()

Write:

    assert_changes 'a' do
        a = 'world'
    end

    assert a != 'world'
    a = 'world'
    assert_equal 'world', a

The string 'a' passed to assert changes is evaluated in the block context, both before and after the block is run. The first eval is call the pre-condition, and the second the post-condition.

Be explicit about a state change by specifying both the starting and ending values using an expression pointing to array of before and after values:

    o.answer = 'yes'
    assert_changes 'o.answer' => ['yes','no'] do
      o.answer = 'no'
    end

When given one value, it is considered the post-condition value.
The precondition is that the value does NOT equal it:

    i = true
    assert_changes 'i' => false do   # read as: i changes to false
      i = false
    end

Assert that several things change by passing an array:

    a,b = 'hello','hi'
    assert_changes ['a','b'] do
        a = 'world'
        b = 'earth'
    end

Or use a hash, and pass multiple pre/post conditions of arbitrary complexity:

      assert_changes 'post(:a).status' => [:preview, :published],
                            'comment(:c).status' => [:preview, :deleted] do
        ...
      end

assert_no_changes has an extended parameter possibilities:

    i,j = 'hello','hi'
    assert_no_changes 'i' do ...                # i (before) == i (after)
    assert_no_changes 'i'=>'hello' do ...       # i == 'hello' before and after
    assert_no_changes ['i','j'] do ...          # neither i nor j change
    assert_no_changes 'i'=>'hello','j'=>'hi' do # or be explicit with multiple

Provide multiple assertions of arbitrary complexity, referencing fixtures, etc.
Note that assert_changes supports the :no_change symbol:

    assert_changes
        'inotech.services.public.include?(categories(:a))' => [true, :no_change],
            'inotech.services.public.include?(categories(:b))'=>false,
            'inotech.services.public.include?(categories(:c))'=>false do
      post :edit_services_dialog, :id=>inotech.id, :service_category_id=>categories(:a).id
    end

• none

• Installing the gem:

  sudo gem install ndp-ayudante --source=http://gems.github.com

• or in environment.rb
  

    Rails::Initializer.run do |config|
      config.gem "ndp-ayudante", :source => "http://gems.github.com", :lib=>'ayudante'
    end

• Better error messages on fixture helpers
• Add assert_includes_N fixture helper
• Add assert_excludes_N fixture helper

(The MIT License)

Copyright © 2009 Andrew J. Peterson, [email protected]

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
‘Software’), to deal in the Software without restriction, including
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permit persons to whom the Software is furnished to do so, subject to
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The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

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