1Test::XML::XPath(3)   User Contributed Perl Documentation  Test::XML::XPath(3)
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NAME

6       Test::XML::XPath - Test XPath assertions
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SYNOPSIS

9         use Test::XML::XPath tests => 3;
10         like_xpath( '<foo />', '/foo' );   # PASS
11         like_xpath( '<foo />', '/bar' );   # FAIL
12         unlike_xpath( '<foo />', '/bar' ); # PASS
13
14         is_xpath( '<foo>bar</foo>', '/foo', 'bar' ); # PASS
15         is_xpath( '<foo>bar</foo>', '/bar', 'foo' ); # FAIL
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17         # More interesting examples of xpath assertions.
18         my $xml = '<foo attrib="1"><bish><bosh args="42">pub</bosh></bish></foo>';
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20         # Do testing for attributes.
21         like_xpath( $xml, '/foo[@attrib="1"]' ); # PASS
22         # Find an element anywhere in the document.
23         like_xpath( $xml, '//bosh' ); # PASS
24         # Both.
25         like_xpath( $xml, '//bosh[@args="42"]' ); # PASS
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DESCRIPTION

28       This module allows you to assert statements about your XML in the form
29       of XPath statements.  You can say that a piece of XML must contain
30       certain tags, with so-and-so attributes, etc.  It will try to use any
31       installed XPath module that it knows about.  Currently, this means
32       XML::LibXML and XML::XPath, in that order.
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34       NB: Normally in XPath processing, the statement occurs from a context
35       node.  In the case of like_xpath(), the context node will always be the
36       root node.  In practice, this means that these two statements are
37       identical:
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39          # Absolute path.
40          like_xpath( '<foo/>', '/foo' );
41          # Path relative to root.
42          like_xpath( '<foo/>', 'foo' );
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44       It's probably best to use absolute paths everywhere in order to keep
45       things simple.
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47       NB: Beware of specifying attributes.  Because they use an @-sign, perl
48       will complain about trying to interpolate arrays if you don't escape
49       them or use single quotes.
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FUNCTIONS

52       like_xpath ( XML, XPATH [, NAME ] )
53           Assert that XML (a string containing XML) matches the statement
54           XPATH.  NAME is the name of the test.
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56           Returns true or false depending upon test success.
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58       unlike_xpath ( XML, XPATH [, NAME ] )
59           This is the reverse of like_xpath().  The test will only pass if
60           XPATH does not generates any matches in XML.
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62           Returns true or false depending upon test success.
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64       is_xpath ( XML, XPATH, EXPECTED [, NAME ] )
65           Evaluates XPATH against XML, and pass the test if the is EXPECTED.
66           Uses findvalue() internally.
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68           Returns true or false depending upon test success.
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70       set_xpath_processor ( CLASS )
71           Set the class name of the XPath processor used.  It is up to you to
72           ensure that this class is loaded.
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74       In all cases, XML must be well formed, or the test will fail.
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SEE ALSO

77       Test::XML.
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79       XML::XPath, which is the basis for this module.
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81       If you are not conversant with XPath, there are many tutorials
82       available on the web.  Google will point you at them.  The first one
83       that I saw was: <http://www.zvon.org/xxl/XPathTutorial/>, which appears
84       to offer interactive XPath as well as the tutorials.
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AUTHOR

87       Dominic Mitchell <cpan2 (at) semantico.com>
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90       Copyright 2002 by semantico
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92       This library is free software; you can redistribute it and/or modify it
93       under the same terms as Perl itself.
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97perl v5.30.1                      2020-01-30               Test::XML::XPath(3)
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