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-rw-r--r--actionpack/test/controller/selector_test.rb629
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diff --git a/actionpack/test/controller/selector_test.rb b/actionpack/test/controller/selector_test.rb
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+++ b/actionpack/test/controller/selector_test.rb
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+#--
+# Copyright (c) 2006 Assaf Arkin (http://labnotes.org)
+# Under MIT and/or CC By license.
+#++
+
+require 'abstract_unit'
+require 'controller/fake_controllers'
+require 'action_view/vendor/html-scanner'
+
+class SelectorTest < ActiveSupport::TestCase
+ #
+ # Basic selector: element, id, class, attributes.
+ #
+
+ def test_element
+ parse(%Q{<div id="1"></div><p></p><div id="2"></div>})
+ # Match element by name.
+ select("div")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ # Not case sensitive.
+ select("DIV")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ # Universal match (all elements).
+ select("*")
+ assert_equal 3, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal nil, @matches[1].attributes["id"]
+ assert_equal "2", @matches[2].attributes["id"]
+ end
+
+
+ def test_identifier
+ parse(%Q{<div id="1"></div><p></p><div id="2"></div>})
+ # Match element by ID.
+ select("div#1")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ # Match element by ID, substitute value.
+ select("div#?", 2)
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Element name does not match ID.
+ select("p#?", 2)
+ assert_equal 0, @matches.size
+ # Use regular expression.
+ select("#?", /\d/)
+ assert_equal 2, @matches.size
+ end
+
+
+ def test_class_name
+ parse(%Q{<div id="1" class=" foo "></div><p id="2" class=" foo bar "></p><div id="3" class="bar"></div>})
+ # Match element with specified class.
+ select("div.foo")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ # Match any element with specified class.
+ select("*.foo")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ # Match elements with other class.
+ select("*.bar")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # Match only element with both class names.
+ select("*.bar.foo")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ end
+
+
+ def test_attribute
+ parse(%Q{<div id="1"></div><p id="2" title="" bar="foo"></p><div id="3" title="foo"></div>})
+ # Match element with attribute.
+ select("div[title]")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ # Match any element with attribute.
+ select("*[title]")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # Match element with attribute value.
+ select("*[title=foo]")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ # Match element with attribute and attribute value.
+ select("[bar=foo][title]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Not case sensitive.
+ select("[BAR=foo][TiTle]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ end
+
+
+ def test_attribute_quoted
+ parse(%Q{<div id="1" title="foo"></div><div id="2" title="bar"></div><div id="3" title=" bar "></div>})
+ # Match without quotes.
+ select("[title = bar]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Match with single quotes.
+ select("[title = 'bar' ]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Match with double quotes.
+ select("[title = \"bar\" ]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Match with spaces.
+ select("[title = \" bar \" ]")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ end
+
+
+ def test_attribute_equality
+ parse(%Q{<div id="1" title="foo bar"></div><div id="2" title="barbaz"></div>})
+ # Match (fail) complete value.
+ select("[title=bar]")
+ assert_equal 0, @matches.size
+ # Match space-separate word.
+ select("[title~=foo]")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ select("[title~=bar]")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ # Match beginning of value.
+ select("[title^=ba]")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Match end of value.
+ select("[title$=ar]")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ # Match text in value.
+ select("[title*=bar]")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ # Match first space separated word.
+ select("[title|=foo]")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ select("[title|=bar]")
+ assert_equal 0, @matches.size
+ end
+
+
+ #
+ # Selector composition: groups, sibling, children
+ #
+
+
+ def test_selector_group
+ parse(%Q{<h1 id="1"></h1><h2 id="2"></h2><h3 id="3"></h3>})
+ # Simple group selector.
+ select("h1,h3")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ select("h1 , h3")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # Complex group selector.
+ parse(%Q{<h1 id="1"><a href="foo"></a></h1><h2 id="2"><a href="bar"></a></h2><h3 id="2"><a href="baz"></a></h3>})
+ select("h1 a, h3 a")
+ assert_equal 2, @matches.size
+ assert_equal "foo", @matches[0].attributes["href"]
+ assert_equal "baz", @matches[1].attributes["href"]
+ # And now for the three selector challenge.
+ parse(%Q{<h1 id="1"><a href="foo"></a></h1><h2 id="2"><a href="bar"></a></h2><h3 id="2"><a href="baz"></a></h3>})
+ select("h1 a, h2 a, h3 a")
+ assert_equal 3, @matches.size
+ assert_equal "foo", @matches[0].attributes["href"]
+ assert_equal "bar", @matches[1].attributes["href"]
+ assert_equal "baz", @matches[2].attributes["href"]
+ end
+
+
+ def test_sibling_selector
+ parse(%Q{<h1 id="1"></h1><h2 id="2"></h2><h3 id="3"></h3>})
+ # Test next sibling.
+ select("h1+*")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ select("h1+h2")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ select("h1+h3")
+ assert_equal 0, @matches.size
+ select("*+h3")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ # Test any sibling.
+ select("h1~*")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ select("h2~*")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ end
+
+
+ def test_children_selector
+ parse(%Q{<div><p id="1"><span id="2"></span></p></div><div><p id="3"><span id="4" class="foo"></span></p></div>})
+ # Test child selector.
+ select("div>p")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ select("div>span")
+ assert_equal 0, @matches.size
+ select("div>p#3")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ select("div>p>span")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ # Test descendant selector.
+ select("div p")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ select("div span")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ select("div *#3")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ select("div *#4")
+ assert_equal 1, @matches.size
+ assert_equal "4", @matches[0].attributes["id"]
+ # This is here because it failed before when whitespaces
+ # were not properly stripped.
+ select("div .foo")
+ assert_equal 1, @matches.size
+ assert_equal "4", @matches[0].attributes["id"]
+ end
+
+
+ #
+ # Pseudo selectors: root, nth-child, empty, content, etc
+ #
+
+
+ def test_root_selector
+ parse(%Q{<div id="1"><div id="2"></div></div>})
+ # Can only find element if it's root.
+ select(":root")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ select("#1:root")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ select("#2:root")
+ assert_equal 0, @matches.size
+ # Opposite for nth-child.
+ select("#1:nth-child(1)")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_nth_child_odd_even
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Test odd nth children.
+ select("tr:nth-child(odd)")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # Test even nth children.
+ select("tr:nth-child(even)")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ end
+
+
+ def test_nth_child_a_is_zero
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Test the third child.
+ select("tr:nth-child(0n+3)")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ # Same but an can be omitted when zero.
+ select("tr:nth-child(3)")
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ # Second element (but not every second element).
+ select("tr:nth-child(0n+2)")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Before first and past last returns nothing.:
+ assert_raise(ArgumentError) { select("tr:nth-child(-1)") }
+ select("tr:nth-child(0)")
+ assert_equal 0, @matches.size
+ select("tr:nth-child(5)")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_nth_child_a_is_one
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # a is group of one, pick every element in group.
+ select("tr:nth-child(1n+0)")
+ assert_equal 4, @matches.size
+ # Same but a can be omitted when one.
+ select("tr:nth-child(n+0)")
+ assert_equal 4, @matches.size
+ # Same but b can be omitted when zero.
+ select("tr:nth-child(n)")
+ assert_equal 4, @matches.size
+ end
+
+
+ def test_nth_child_b_is_zero
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # If b is zero, pick the n-th element (here each one).
+ select("tr:nth-child(n+0)")
+ assert_equal 4, @matches.size
+ # If b is zero, pick the n-th element (here every second).
+ select("tr:nth-child(2n+0)")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # If a and b are both zero, no element selected.
+ select("tr:nth-child(0n+0)")
+ assert_equal 0, @matches.size
+ select("tr:nth-child(0)")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_nth_child_a_is_negative
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Since a is -1, picks the first three elements.
+ select("tr:nth-child(-n+3)")
+ assert_equal 3, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ assert_equal "3", @matches[2].attributes["id"]
+ # Since a is -2, picks the first in every second of first four elements.
+ select("tr:nth-child(-2n+3)")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ # Since a is -2, picks the first in every second of first three elements.
+ select("tr:nth-child(-2n+2)")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ end
+
+
+ def test_nth_child_b_is_negative
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Select last of four.
+ select("tr:nth-child(4n-1)")
+ assert_equal 1, @matches.size
+ assert_equal "4", @matches[0].attributes["id"]
+ # Select first of four.
+ select("tr:nth-child(4n-4)")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ # Select last of every second.
+ select("tr:nth-child(2n-1)")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ # Select nothing since an+b always < 0
+ select("tr:nth-child(-1n-1)")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_nth_child_substitution_values
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Test with ?n?.
+ select("tr:nth-child(?n?)", 2, 1)
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "3", @matches[1].attributes["id"]
+ select("tr:nth-child(?n?)", 2, 2)
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ select("tr:nth-child(?n?)", 4, 2)
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ # Test with ? (b only).
+ select("tr:nth-child(?)", 3)
+ assert_equal 1, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ select("tr:nth-child(?)", 5)
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_nth_last_child
+ parse(%Q{<table><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # Last two elements.
+ select("tr:nth-last-child(-n+2)")
+ assert_equal 2, @matches.size
+ assert_equal "3", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ # All old elements counting from last one.
+ select("tr:nth-last-child(odd)")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ end
+
+
+ def test_nth_of_type
+ parse(%Q{<table><thead></thead><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # First two elements.
+ select("tr:nth-of-type(-n+2)")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ # All old elements counting from last one.
+ select("tr:nth-last-of-type(odd)")
+ assert_equal 2, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ assert_equal "4", @matches[1].attributes["id"]
+ end
+
+
+ def test_first_and_last
+ parse(%Q{<table><thead></thead><tr id="1"></tr><tr id="2"></tr><tr id="3"></tr><tr id="4"></tr></table>})
+ # First child.
+ select("tr:first-child")
+ assert_equal 0, @matches.size
+ select(":first-child")
+ assert_equal 1, @matches.size
+ assert_equal "thead", @matches[0].name
+ # First of type.
+ select("tr:first-of-type")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ select("thead:first-of-type")
+ assert_equal 1, @matches.size
+ assert_equal "thead", @matches[0].name
+ select("div:first-of-type")
+ assert_equal 0, @matches.size
+ # Last child.
+ select("tr:last-child")
+ assert_equal 1, @matches.size
+ assert_equal "4", @matches[0].attributes["id"]
+ # Last of type.
+ select("tr:last-of-type")
+ assert_equal 1, @matches.size
+ assert_equal "4", @matches[0].attributes["id"]
+ select("thead:last-of-type")
+ assert_equal 1, @matches.size
+ assert_equal "thead", @matches[0].name
+ select("div:last-of-type")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_only_child_and_only_type_first_and_last
+ # Only child.
+ parse(%Q{<table><tr></tr></table>})
+ select("table:only-child")
+ assert_equal 0, @matches.size
+ select("tr:only-child")
+ assert_equal 1, @matches.size
+ assert_equal "tr", @matches[0].name
+ parse(%Q{<table><tr></tr><tr></tr></table>})
+ select("tr:only-child")
+ assert_equal 0, @matches.size
+ # Only of type.
+ parse(%Q{<table><thead></thead><tr></tr><tr></tr></table>})
+ select("thead:only-of-type")
+ assert_equal 1, @matches.size
+ assert_equal "thead", @matches[0].name
+ select("td:only-of-type")
+ assert_equal 0, @matches.size
+ end
+
+
+ def test_empty
+ parse(%Q{<table><tr></tr></table>})
+ select("table:empty")
+ assert_equal 0, @matches.size
+ select("tr:empty")
+ assert_equal 1, @matches.size
+ parse(%Q{<div> </div>})
+ select("div:empty")
+ assert_equal 1, @matches.size
+ end
+
+
+ def test_content
+ parse(%Q{<div> </div>})
+ select("div:content()")
+ assert_equal 1, @matches.size
+ parse(%Q{<div>something </div>})
+ select("div:content()")
+ assert_equal 0, @matches.size
+ select("div:content(something)")
+ assert_equal 1, @matches.size
+ select("div:content( 'something' )")
+ assert_equal 1, @matches.size
+ select("div:content( \"something\" )")
+ assert_equal 1, @matches.size
+ select("div:content(?)", "something")
+ assert_equal 1, @matches.size
+ select("div:content(?)", /something/)
+ assert_equal 1, @matches.size
+ end
+
+
+ #
+ # Test negation.
+ #
+
+
+ def test_element_negation
+ parse(%Q{<p></p><div></div>})
+ select("*")
+ assert_equal 2, @matches.size
+ select("*:not(p)")
+ assert_equal 1, @matches.size
+ assert_equal "div", @matches[0].name
+ select("*:not(div)")
+ assert_equal 1, @matches.size
+ assert_equal "p", @matches[0].name
+ select("*:not(span)")
+ assert_equal 2, @matches.size
+ end
+
+
+ def test_id_negation
+ parse(%Q{<p id="1"></p><p id="2"></p>})
+ select("p")
+ assert_equal 2, @matches.size
+ select(":not(#1)")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ select(":not(#2)")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ end
+
+
+ def test_class_name_negation
+ parse(%Q{<p class="foo"></p><p class="bar"></p>})
+ select("p")
+ assert_equal 2, @matches.size
+ select(":not(.foo)")
+ assert_equal 1, @matches.size
+ assert_equal "bar", @matches[0].attributes["class"]
+ select(":not(.bar)")
+ assert_equal 1, @matches.size
+ assert_equal "foo", @matches[0].attributes["class"]
+ end
+
+
+ def test_attribute_negation
+ parse(%Q{<p title="foo"></p><p title="bar"></p>})
+ select("p")
+ assert_equal 2, @matches.size
+ select(":not([title=foo])")
+ assert_equal 1, @matches.size
+ assert_equal "bar", @matches[0].attributes["title"]
+ select(":not([title=bar])")
+ assert_equal 1, @matches.size
+ assert_equal "foo", @matches[0].attributes["title"]
+ end
+
+
+ def test_pseudo_class_negation
+ parse(%Q{<div><p id="1"></p><p id="2"></p></div>})
+ select("p")
+ assert_equal 2, @matches.size
+ select("p:not(:first-child)")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ select("p:not(:nth-child(2))")
+ assert_equal 1, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ end
+
+
+ def test_negation_details
+ parse(%Q{<p id="1"></p><p id="2"></p><p id="3"></p>})
+ assert_raise(ArgumentError) { select(":not(") }
+ assert_raise(ArgumentError) { select(":not(:not())") }
+ select("p:not(#1):not(#3)")
+ assert_equal 1, @matches.size
+ assert_equal "2", @matches[0].attributes["id"]
+ end
+
+
+ def test_select_from_element
+ parse(%Q{<div><p id="1"></p><p id="2"></p></div>})
+ select("div")
+ @matches = @matches[0].select("p")
+ assert_equal 2, @matches.size
+ assert_equal "1", @matches[0].attributes["id"]
+ assert_equal "2", @matches[1].attributes["id"]
+ end
+
+
+protected
+
+ def parse(html)
+ @html = HTML::Document.new(html).root
+ end
+
+ def select(*selector)
+ @matches = HTML.selector(*selector).select(@html)
+ end
+
+end
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