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30 """Unit test utilities for gtest_xml_output"""
33 from xml.dom import minidom, Node
34 from googletest.test import gtest_test_utils
36 GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
39 class GTestXMLTestCase(gtest_test_utils.TestCase):
40 """Base class for tests of Google Test's XML output functionality."""
42 def AssertEquivalentNodes(self, expected_node, actual_node):
43 """Asserts that actual_node is equivalent to expected_node.
45 Asserts that actual_node (a DOM node object) is equivalent to
46 expected_node (another DOM node object), in that either both of
47 them are CDATA nodes and have the same value, or both are DOM
48 elements and actual_node meets all of the following conditions:
50 * It has the same tag name as expected_node.
51 * It has the same set of attributes as expected_node, each with
52 the same value as the corresponding attribute of expected_node.
53 Exceptions are any attribute named "time", which needs only be
54 convertible to a floating-point number and any attribute named
55 "type_param" which only has to be non-empty.
56 * It has an equivalent set of child nodes (including elements and
57 CDATA sections) as expected_node. Note that we ignore the
58 order of the children as they are not guaranteed to be in any
62 expected_node: expected DOM node object
63 actual_node: actual DOM node object
66 if expected_node.nodeType == Node.CDATA_SECTION_NODE:
67 self.assertEqual(Node.CDATA_SECTION_NODE, actual_node.nodeType)
68 self.assertEqual(expected_node.nodeValue, actual_node.nodeValue)
71 self.assertEqual(Node.ELEMENT_NODE, actual_node.nodeType)
72 self.assertEqual(Node.ELEMENT_NODE, expected_node.nodeType)
73 self.assertEqual(expected_node.tagName, actual_node.tagName)
75 expected_attributes = expected_node.attributes
76 actual_attributes = actual_node.attributes
78 expected_attributes.length,
79 actual_attributes.length,
80 'attribute numbers differ in element %s:\nExpected: %r\nActual: %r'
83 expected_attributes.keys(),
84 actual_attributes.keys(),
87 for i in range(expected_attributes.length):
88 expected_attr = expected_attributes.item(i)
89 actual_attr = actual_attributes.get(expected_attr.name)
91 actual_attr is not None,
92 'expected attribute %s not found in element %s'
93 % (expected_attr.name, actual_node.tagName),
98 ' values of attribute %s in element %s differ: %s vs %s'
107 expected_children = self._GetChildren(expected_node)
108 actual_children = self._GetChildren(actual_node)
110 len(expected_children),
111 len(actual_children),
112 'number of child elements differ in element ' + actual_node.tagName,
114 for child_id, child in expected_children.items():
116 child_id in actual_children,
117 '<%s> is not in <%s> (in element %s)'
118 % (child_id, actual_children, actual_node.tagName),
120 self.AssertEquivalentNodes(child, actual_children[child_id])
122 identifying_attribute = {
123 'testsuites': 'name',
126 'failure': 'message',
127 'skipped': 'message',
131 def _GetChildren(self, element):
132 """Fetches all of the child nodes of element, a DOM Element object.
134 Returns them as the values of a dictionary keyed by the IDs of the children.
135 For <testsuites>, <testsuite>, <testcase>, and <property> elements, the ID
136 is the value of their "name" attribute; for <failure> elements, it is the
137 value of the "message" attribute; for <properties> elements, it is the value
138 of their parent's "name" attribute plus the literal string "properties";
139 CDATA sections and non-whitespace text nodes are concatenated into a single
140 CDATA section with ID "detail". An exception is raised if any element other
141 than the above four is encountered, if two child elements with the same
142 identifying attributes are encountered, or if any other type of node is
146 element: DOM Element object
149 Dictionary where keys are the IDs of the children.
153 for child in element.childNodes:
154 if child.nodeType == Node.ELEMENT_NODE:
155 if child.tagName == 'properties':
157 child.parentNode is not None,
158 'Encountered <properties> element without a parent',
160 child_id = child.parentNode.getAttribute('name') + '-properties'
163 child.tagName in self.identifying_attribute,
164 'Encountered unknown element <%s>' % child.tagName,
166 child_id = child.getAttribute(
167 self.identifying_attribute[child.tagName]
169 self.assertNotIn(child_id, children)
170 children[child_id] = child
171 elif child.nodeType in [Node.TEXT_NODE, Node.CDATA_SECTION_NODE]:
172 if 'detail' not in children:
174 child.nodeType == Node.CDATA_SECTION_NODE
175 or not child.nodeValue.isspace()
177 children['detail'] = child.ownerDocument.createCDATASection(
181 children['detail'].nodeValue += child.nodeValue
183 self.fail('Encountered unexpected node type %d' % child.nodeType)
186 def NormalizeXml(self, element):
187 """Normalizes XML that may change from run to run.
189 Normalizes Google Test's XML output to eliminate references to transient
190 information that may change from run to run.
192 * The "time" attribute of <testsuites>, <testsuite> and <testcase>
193 elements is replaced with a single asterisk, if it contains
194 only digit characters.
195 * The "timestamp" attribute of <testsuites> elements is replaced with a
196 single asterisk, if it contains a valid ISO8601 datetime value.
197 * The "type_param" attribute of <testcase> elements is replaced with a
198 single asterisk (if it sn non-empty) as it is the type name returned
199 by the compiler and is platform dependent.
200 * The line info reported in the first line of the "message"
201 attribute and CDATA section of <failure> elements is replaced with the
202 file's basename and a single asterisk for the line number.
203 * The directory names in file paths are removed.
204 * The stack traces are removed.
207 element: DOM element to normalize
210 if element.tagName == 'testcase':
211 source_file = element.getAttributeNode('file')
213 source_file.value = re.sub(r'^.*[/\\](.*)', '\\1', source_file.value)
214 if element.tagName in ('testsuites', 'testsuite', 'testcase'):
215 timestamp = element.getAttributeNode('timestamp')
216 timestamp.value = re.sub(
217 r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d$', '*', timestamp.value
219 if element.tagName in ('testsuites', 'testsuite', 'testcase'):
220 time = element.getAttributeNode('time')
221 # The value for exact N seconds has a trailing decimal point (e.g., "10."
223 time.value = re.sub(r'^\d+\.(\d+)?$', '*', time.value)
224 type_param = element.getAttributeNode('type_param')
225 if type_param and type_param.value:
226 type_param.value = '*'
227 elif element.tagName == 'failure' or element.tagName == 'skipped':
228 source_line_pat = r'^.*[/\\](.*:)\d+\n'
229 # Replaces the source line information with a normalized form.
230 message = element.getAttributeNode('message')
231 message.value = re.sub(source_line_pat, '\\1*\n', message.value)
232 for child in element.childNodes:
233 if child.nodeType == Node.CDATA_SECTION_NODE:
234 # Replaces the source line information with a normalized form.
235 cdata = re.sub(source_line_pat, '\\1*\n', child.nodeValue)
236 # Removes the actual stack trace.
237 child.nodeValue = re.sub(
238 r'Stack trace:\n(.|\n)*', 'Stack trace:\n*', cdata
240 for child in element.childNodes:
241 if child.nodeType == Node.ELEMENT_NODE:
242 self.NormalizeXml(child)