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require "test/unit/testcase"
require "rexml/document"
require "rexml/xpath"
require "rexml/parsers/xpathparser"
module REXMLTests
class TestXPathPredicate < Test::Unit::TestCase
include REXML
SRC=<<-EOL
<article>
<section role="subdivision" id="1">
<para>free flowing text.</para>
</section>
<section role="division">
<section role="subdivision" id="2">
<para>free flowing text.</para>
</section>
<section role="division">
<para>free flowing text.</para>
</section>
</section>
</article>
EOL
def setup
@doc = REXML::Document.new( SRC )
@parser = REXML::Parsers::XPathParser.new
end
def test_predicates_parent
path = '//section[../self::section[@role="division"]]'
m = do_path( path )
assert_equal( 2, m.size )
assert_equal( "2", m[0].attributes["id"] )
assert_nil( m[1].attributes["id"] )
end
def test_predicates_single
path = '//section[@role="subdivision" and not(../self::section[@role="division"])]'
m = do_path( path )
assert_equal( 1, m.size )
assert_equal( "1", m[0].attributes["id"] )
end
def test_predicates_multi
path = '//section[@role="subdivision"][not(../self::section[@role="division"])]'
m = do_path( path )
assert_equal( 1, m.size )
assert_equal( "1", m[0].attributes["id"] )
end
def do_path( path )
m = REXML::XPath.match( @doc, path )
#puts path, @parser.parse( path ).inspect
return m
end
def test_get_no_siblings_terminal_nodes
source = <<-XML
<a>
<b number='1' str='abc'>TEXT1</b>
<c number='1'/>
<c number='2' str='def'>
<b number='3'/>
<d number='1' str='abc'>TEXT2</d>
<b number='2'><!--COMMENT--></b>
</c>
</a>
XML
doc = REXML::Document.new(source)
predicate = "count(child::node()|" +
"following-sibling::node()|" +
"preceding-sibling::node())=0"
m = REXML::XPath.match(doc, "/descendant-or-self::node()[#{predicate}]")
assert_equal( [REXML::Text.new("TEXT1"),
REXML::Text.new("TEXT2"),
REXML::Comment.new("COMMENT")],
m )
end
end
end
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