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module ActionView
module Assertions
module DomAssertions
# \Test two HTML strings for equivalency (e.g., equal even when attributes are in another order)
#
# # 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")
def assert_dom_equal(expected, actual, message = nil)
assert dom_assertion(expected, actual, message)
end
# The negated form of +assert_dom_equal+.
#
# # 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")
def assert_dom_not_equal(expected, actual, message = nil)
assert_not dom_assertion(expected, actual, message)
end
protected
def dom_assertion(expected_string, actual_string, message = nil)
expected, actual = Loofah.fragment(expected_string), Loofah.fragment(actual_string)
message ||= "Expected: #{expected}\nActual: #{actual}"
return compare_doms(expected, actual), message
end
def compare_doms(expected, actual)
return false unless expected.children.size == actual.children.size
expected.children.each_with_index do |child, i|
return false unless equal_children?(child, actual.children[i])
end
true
end
def equal_children?(child, other_child)
return false unless child.type == other_child.type
if child.element?
child.name == other_child.name &&
equal_attribute_nodes?(child.attribute_nodes, other_child.attribute_nodes)
else
child.to_s == other_child.to_s
end
end
def equal_attribute_nodes?(nodes, other_nodes)
return false unless nodes.size == other_nodes.size
nodes = nodes.sort_by(&:name)
other_nodes = other_nodes.sort_by(&:name)
nodes.each_with_index do |attr, i|
return false unless equal_attribute?(attr, other_nodes[i])
end
true
end
def equal_attribute?(attr, other_attr)
attr.name == other_attr.name && attr.value == other_attr.value
end
end
end
end
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