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"""Unit test utilities for gtest_xml_output"""
import re
from xml.dom import minidom, Node
import gtest_test_utils
GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
class GTestXMLTestCase(gtest_test_utils.TestCase):
"""
Base class for tests of Google Test's XML output functionality.
"""
def AssertEquivalentNodes(self, expected_node, actual_node):
"""
Asserts that actual_node (a DOM node object) is equivalent to
expected_node (another DOM node object), in that either both of
them are CDATA nodes and have the same value, or both are DOM
elements and actual_node meets all of the following conditions:
* It has the same tag name as expected_node.
* It has the same set of attributes as expected_node, each with
the same value as the corresponding attribute of expected_node.
Exceptions are any attribute named "time", which needs only be
convertible to a floating-point number and any attribute named
"type_param" which only has to be non-empty.
* It has an equivalent set of child nodes (including elements and
CDATA sections) as expected_node. Note that we ignore the
order of the children as they are not guaranteed to be in any
particular order.
"""
if expected_node.nodeType == Node.CDATA_SECTION_NODE:
self.assertEquals(Node.CDATA_SECTION_NODE, actual_node.nodeType)
self.assertEquals(expected_node.nodeValue, actual_node.nodeValue)
return
self.assertEquals(Node.ELEMENT_NODE, actual_node.nodeType)
self.assertEquals(Node.ELEMENT_NODE, expected_node.nodeType)
self.assertEquals(expected_node.tagName, actual_node.tagName)
expected_attributes = expected_node.attributes
actual_attributes = actual_node .attributes
self.assertEquals(
expected_attributes.length, actual_attributes.length,
'attribute numbers differ in element %s:\nExpected: %r\nActual: %r' % (
actual_node.tagName, expected_attributes.keys(),
actual_attributes.keys()))
for i in range(expected_attributes.length):
expected_attr = expected_attributes.item(i)
actual_attr = actual_attributes.get(expected_attr.name)
self.assert_(
actual_attr is not None,
'expected attribute %s not found in element %s' %
(expected_attr.name, actual_node.tagName))
self.assertEquals(
expected_attr.value, actual_attr.value,
' values of attribute %s in element %s differ: %s vs %s' %
(expected_attr.name, actual_node.tagName,
expected_attr.value, actual_attr.value))
expected_children = self._GetChildren(expected_node)
actual_children = self._GetChildren(actual_node)
self.assertEquals(
len(expected_children), len(actual_children),
'number of child elements differ in element ' + actual_node.tagName)
for child_id, child in expected_children.iteritems():
self.assert_(child_id in actual_children,
'<%s> is not in <%s> (in element %s)' %
(child_id, actual_children, actual_node.tagName))
self.AssertEquivalentNodes(child, actual_children[child_id])
identifying_attribute = {
'testsuites': 'name',
'testsuite': 'name',
'testcase': 'name',
'failure': 'message',
'property': 'name',
}
def _GetChildren(self, element):
"""
Fetches all of the child nodes of element, a DOM Element object.
Returns them as the values of a dictionary keyed by the IDs of the
children. For <testsuites>, <testsuite>, <testcase>, and <property>
elements, the ID is the value of their "name" attribute; for <failure>
elements, it is the value of the "message" attribute; for <properties>
elements, it is the value of their parent's "name" attribute plus the
literal string "properties"; CDATA sections and non-whitespace
text nodes are concatenated into a single CDATA section with ID
"detail". An exception is raised if any element other than the above
four is encountered, if two child elements with the same identifying
attributes are encountered, or if any other type of node is encountered.
"""
children = {}
for child in element.childNodes:
if child.nodeType == Node.ELEMENT_NODE:
if child.tagName == 'properties':
self.assert_(child.parentNode is not None,
'Encountered <properties> element without a parent')
child_id = child.parentNode.getAttribute('name') + '-properties'
else:
self.assert_(child.tagName in self.identifying_attribute,
'Encountered unknown element <%s>' % child.tagName)
child_id = child.getAttribute(
self.identifying_attribute[child.tagName])
self.assert_(child_id not in children)
children[child_id] = child
elif child.nodeType in [Node.TEXT_NODE, Node.CDATA_SECTION_NODE]:
if 'detail' not in children:
if (child.nodeType == Node.CDATA_SECTION_NODE or
not child.nodeValue.isspace()):
children['detail'] = child.ownerDocument.createCDATASection(
child.nodeValue)
else:
children['detail'].nodeValue += child.nodeValue
else:
self.fail('Encountered unexpected node type %d' % child.nodeType)
return children
def NormalizeXml(self, element):
"""
Normalizes Google Test's XML output to eliminate references to transient
information that may change from run to run.
* The "time" attribute of <testsuites>, <testsuite> and <testcase>
elements is replaced with a single asterisk, if it contains
only digit characters.
* The "timestamp" attribute of <testsuites> elements is replaced with a
single asterisk, if it contains a valid ISO8601 datetime value.
* The "type_param" attribute of <testcase> elements is replaced with a
single asterisk (if it sn non-empty) as it is the type name returned
by the compiler and is platform dependent.
* The line info reported in the first line of the "message"
attribute and CDATA section of <failure> elements is replaced with the
file's basename and a single asterisk for the line number.
* The directory names in file paths are removed.
* The stack traces are removed.
"""
if element.tagName == 'testsuites':
timestamp = element.getAttributeNode('timestamp')
timestamp.value = re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d$',
'*', timestamp.value)
if element.tagName in ('testsuites', 'testsuite', 'testcase'):
time = element.getAttributeNode('time')
time.value = re.sub(r'^\d+(\.\d+)?$', '*', time.value)
type_param = element.getAttributeNode('type_param')
if type_param and type_param.value:
type_param.value = '*'
elif element.tagName == 'failure':
source_line_pat = r'^.*[/\\](.*:)\d+\n'
# Replaces the source line information with a normalized form.
message = element.getAttributeNode('message')
message.value = re.sub(source_line_pat, '\\1*\n', message.value)
for child in element.childNodes:
if child.nodeType == Node.CDATA_SECTION_NODE:
# Replaces the source line information with a normalized form.
cdata = re.sub(source_line_pat, '\\1*\n', child.nodeValue)
# Removes the actual stack trace.
child.nodeValue = re.sub(r'Stack trace:\n(.|\n)*',
'Stack trace:\n*', cdata)
for child in element.childNodes:
if child.nodeType == Node.ELEMENT_NODE:
self.NormalizeXml(child)