--- /dev/null
+require 'rexml/document'
+require 'html/document'
+
+module ActionController
+ 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+.
+ #
+ # === Examples
+ #
+ # # 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)
+ clean_backtrace do
+ 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
+ end
+
+ # Identical to +assert_tag+, but asserts that a matching tag does _not_
+ # exist. (See +assert_tag+ for a full discussion of the syntax.)
+ #
+ # === Examples
+ # # 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)
+ clean_backtrace do
+ 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
+ end
+ end
+ end
+end
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