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require 'action_view/vendor/html-scanner'
module ActionDispatch
module Assertions
# Pair of assertions to testing elements in the HTML output of the response.
module TagAssertions
# Asserts that there is a tag/node/element in the body of the response
# that meets all of the given conditions. The +conditions+ parameter must
# be a hash of any of the following keys (all are optional):
#
# * <tt>:tag</tt>: the node type must match the corresponding value
# * <tt>:attributes</tt>: a hash. The node's attributes must match the
# corresponding values in the hash.
# * <tt>:parent</tt>: a hash. The node's parent must match the
# corresponding hash.
# * <tt>:child</tt>: a hash. At least one of the node's immediate children
# must meet the criteria described by the hash.
# * <tt>:ancestor</tt>: a hash. At least one of the node's ancestors must
# meet the criteria described by the hash.
# * <tt>:descendant</tt>: a hash. At least one of the node's descendants
# must meet the criteria described by the hash.
# * <tt>:sibling</tt>: a hash. At least one of the node's siblings must
# meet the criteria described by the hash.
# * <tt>:after</tt>: a hash. The node must be after any sibling meeting
# the criteria described by the hash, and at least one sibling must match.
# * <tt>:before</tt>: a hash. The node must be before any sibling meeting
# the criteria described by the hash, and at least one sibling must match.
# * <tt>:children</tt>: a hash, for counting children of a node. Accepts
# the keys:
# * <tt>:count</tt>: either a number or a range which must equal (or
# include) the number of children that match.
# * <tt>:less_than</tt>: the number of matching children must be less
# than this number.
# * <tt>:greater_than</tt>: the number of matching children must be
# greater than this number.
# * <tt>:only</tt>: another hash consisting of the keys to use
# to match on the children, and only matching children will be
# counted.
# * <tt>:content</tt>: the textual content of the node must match the
# given value. This will not match HTML tags in the body of a
# tag--only text.
#
# Conditions are matched using the following algorithm:
#
# * if the condition is a string, it must be a substring of the value.
# * if the condition is a regexp, it must match the value.
# * if the condition is a number, the value must match number.to_s.
# * if the condition is +true+, the value must not be +nil+.
# * if the condition is +false+ or +nil+, the value must be +nil+.
#
# # Assert that there is a "span" tag
# assert_tag :tag => "span"
#
# # Assert that there is a "span" tag with id="x"
# assert_tag :tag => "span", :attributes => { :id => "x" }
#
# # Assert that there is a "span" tag using the short-hand
# assert_tag :span
#
# # Assert that there is a "span" tag with id="x" using the short-hand
# assert_tag :span, :attributes => { :id => "x" }
#
# # Assert that there is a "span" inside of a "div"
# assert_tag :tag => "span", :parent => { :tag => "div" }
#
# # Assert that there is a "span" somewhere inside a table
# assert_tag :tag => "span", :ancestor => { :tag => "table" }
#
# # Assert that there is a "span" with at least one "em" child
# assert_tag :tag => "span", :child => { :tag => "em" }
#
# # Assert that there is a "span" containing a (possibly nested)
# # "strong" tag.
# assert_tag :tag => "span", :descendant => { :tag => "strong" }
#
# # Assert that there is a "span" containing between 2 and 4 "em" tags
# # as immediate children
# assert_tag :tag => "span",
# :children => { :count => 2..4, :only => { :tag => "em" } }
#
# # Get funky: assert that there is a "div", with an "ul" ancestor
# # and an "li" parent (with "class" = "enum"), and containing a
# # "span" descendant that contains text matching /hello world/
# assert_tag :tag => "div",
# :ancestor => { :tag => "ul" },
# :parent => { :tag => "li",
# :attributes => { :class => "enum" } },
# :descendant => { :tag => "span",
# :child => /hello world/ }
#
# <b>Please note</b>: +assert_tag+ and +assert_no_tag+ only work
# with well-formed XHTML. They recognize a few tags as implicitly self-closing
# (like br and hr and such) but will not work correctly with tags
# that allow optional closing tags (p, li, td). <em>You must explicitly
# close all of your tags to use these assertions.</em>
def assert_tag(*opts)
opts = opts.size > 1 ? opts.last.merge({ :tag => opts.first.to_s }) : opts.first
tag = find_tag(opts)
assert tag, "expected tag, but no tag found matching #{opts.inspect} in:\n#{@response.body.inspect}"
end
# Identical to +assert_tag+, but asserts that a matching tag does _not_
# exist. (See +assert_tag+ for a full discussion of the syntax.)
#
# # Assert that there is not a "div" containing a "p"
# assert_no_tag :tag => "div", :descendant => { :tag => "p" }
#
# # Assert that an unordered list is empty
# assert_no_tag :tag => "ul", :descendant => { :tag => "li" }
#
# # Assert that there is not a "p" tag with between 1 to 3 "img" tags
# # as immediate children
# assert_no_tag :tag => "p",
# :children => { :count => 1..3, :only => { :tag => "img" } }
def assert_no_tag(*opts)
opts = opts.size > 1 ? opts.last.merge({ :tag => opts.first.to_s }) : opts.first
tag = find_tag(opts)
assert !tag, "expected no tag, but found tag matching #{opts.inspect} in:\n#{@response.body.inspect}"
end
def find_tag(conditions)
html_document.find(conditions)
end
def find_all_tag(conditions)
html_document.find_all(conditions)
end
def html_document
xml = @response.content_type =~ /xml$/
@html_document ||= HTML::Document.new(@response.body, false, xml)
end
end
end
end
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