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rails/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 "#{File.dirname(__FILE__)}/../abstract_unit"
require "#{File.dirname(__FILE__)}/fake_controllers"
class SelectorTest < Test::Unit::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 alement with attribute value.
select("*[title=foo]")
assert_equal 1, @matches.size
assert_equal "3", @matches[0].attributes["id"]
# Match alement 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 challange.
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_raises(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_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_raises(ArgumentError) { select(":not(") }
assert_raises(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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