Module: ActionController::Assertions::DomAssertions

Defined in:
lib/action_controller/assertions/dom_assertions.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.strip_whitespace!(nodes) ⇒ Object 



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# File 'lib/action_controller/assertions/dom_assertions.rb', line 4

def self.strip_whitespace!(nodes)
  nodes.reject! do |node|
    if node.is_a?(HTML::Text)
      node.content.strip!
      node.content.empty?
    else
      strip_whitespace! node.children
      false
    end
  end
end

Instance Method Details

#assert_dom_equal(expected, actual, message = "") ⇒ Object

Test two HTML strings for equivalency (e.g., identical up to reordering of attributes)

Examples

# assert that the referenced method generates the appropriate HTML string
assert_dom_equal '<a href="http://www.example.com">Apples</a>', link_to("Apples", "http://www.example.com")



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# File 'lib/action_controller/assertions/dom_assertions.rb', line 23

def assert_dom_equal(expected, actual, message = "")
  clean_backtrace do
    expected_dom = HTML::Document.new(expected).root
    actual_dom   = HTML::Document.new(actual).root
    DomAssertions.strip_whitespace!(expected_dom.children)
    DomAssertions.strip_whitespace!(actual_dom.children)

    full_message = build_message(message, "<?> expected but was\n<?>.", expected_dom.to_s, actual_dom.to_s)
    assert_block(full_message) { expected_dom == actual_dom }
  end
end

#assert_dom_not_equal(expected, actual, message = "") ⇒ Object

The negated form of assert_dom_equal.

Examples

# assert that the referenced method does not generate the specified HTML string
assert_dom_not_equal '<a href="http://www.example.com">Apples</a>', link_to("Oranges", "http://www.example.com")



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# File 'lib/action_controller/assertions/dom_assertions.rb', line 42

def assert_dom_not_equal(expected, actual, message = "")
  clean_backtrace do
    expected_dom = HTML::Document.new(expected).root
    actual_dom   = HTML::Document.new(actual).root
    DomAssertions.strip_whitespace!(expected_dom.children)
    DomAssertions.strip_whitespace!(actual_dom.children)

    full_message = build_message(message, "<?> expected to be != to\n<?>.", expected_dom.to_s, actual_dom.to_s)
    assert_block(full_message) { expected_dom != actual_dom }
  end
end