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emma_coverage_stats_test.py
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emma_coverage_stats_test.py
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#!/usr/bin/env python
# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# pylint: disable=protected-access
import unittest
from xml.etree import ElementTree
import emma_coverage_stats
from pylib.constants import host_paths
with host_paths.SysPath(host_paths.PYMOCK_PATH):
import mock # pylint: disable=import-error
EMPTY_COVERAGE_STATS_DICT = {
'files': {},
'patch': {
'incremental': {
'covered': 0, 'total': 0
}
}
}
class _EmmaHtmlParserTest(unittest.TestCase):
"""Tests for _EmmaHtmlParser.
Uses modified EMMA report HTML that contains only the subset of tags needed
for test verification.
"""
def setUp(self):
self.emma_dir = 'fake/dir/'
self.parser = emma_coverage_stats._EmmaHtmlParser(self.emma_dir)
self.simple_html = '<TR><TD CLASS="p">Test HTML</TD></TR>'
self.index_html = (
'<HTML>'
'<BODY>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CLASS="it" CELLSPACING="0">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'<TR>'
'<TH CLASS="f">name</TH>'
'<TH>class, %</TH>'
'<TH>method, %</TH>'
'<TH>block, %</TH>'
'<TH>line, %</TH>'
'</TR>'
'<TR CLASS="o">'
'<TD><A HREF="_files/0.html"'
'>org.chromium.chrome.browser</A></TD>'
'<TD CLASS="h">0% (0/3)</TD>'
'</TR>'
'<TR>'
'<TD><A HREF="_files/1.html"'
'>org.chromium.chrome.browser.tabmodel</A></TD>'
'<TD CLASS="h">0% (0/8)</TD>'
'</TR>'
'</TABLE>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'</BODY>'
'</HTML>'
)
self.package_1_class_list_html = (
'<HTML>'
'<BODY>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'<TR>'
'<TH CLASS="f">name</TH>'
'<TH>class, %</TH>'
'<TH>method, %</TH>'
'<TH>block, %</TH>'
'<TH>line, %</TH>'
'</TR>'
'<TR CLASS="o">'
'<TD><A HREF="1e.html">IntentHelper.java</A></TD>'
'<TD CLASS="h">0% (0/3)</TD>'
'<TD CLASS="h">0% (0/9)</TD>'
'<TD CLASS="h">0% (0/97)</TD>'
'<TD CLASS="h">0% (0/26)</TD>'
'</TR>'
'</TABLE>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'</BODY>'
'</HTML>'
)
self.package_2_class_list_html = (
'<HTML>'
'<BODY>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'<TABLE CELLSPACING="0" WIDTH="100%">'
'<TR>'
'<TH CLASS="f">name</TH>'
'<TH>class, %</TH>'
'<TH>method, %</TH>'
'<TH>block, %</TH>'
'<TH>line, %</TH>'
'</TR>'
'<TR CLASS="o">'
'<TD><A HREF="1f.html">ContentSetting.java</A></TD>'
'<TD CLASS="h">0% (0/1)</TD>'
'</TR>'
'<TR>'
'<TD><A HREF="20.html">DevToolsServer.java</A></TD>'
'</TR>'
'<TR CLASS="o">'
'<TD><A HREF="21.html">FileProviderHelper.java</A></TD>'
'</TR>'
'<TR>'
'<TD><A HREF="22.html">ContextualMenuBar.java</A></TD>'
'</TR>'
'<TR CLASS="o">'
'<TD><A HREF="23.html">AccessibilityUtil.java</A></TD>'
'</TR>'
'<TR>'
'<TD><A HREF="24.html">NavigationPopup.java</A></TD>'
'</TR>'
'</TABLE>'
'<TABLE CLASS="hdft" CELLSPACING="0" WIDTH="100%">'
'</TABLE>'
'</BODY>'
'</HTML>'
)
self.partially_covered_tr_html = (
'<TR CLASS="p">'
'<TD CLASS="l" TITLE="78% line coverage (7 out of 9)">108</TD>'
'<TD TITLE="78% line coverage (7 out of 9 instructions)">'
'if (index < 0 || index = mSelectors.size()) index = 0;</TD>'
'</TR>'
)
self.covered_tr_html = (
'<TR CLASS="c">'
'<TD CLASS="l">110</TD>'
'<TD> if (mSelectors.get(index) != null) {</TD>'
'</TR>'
)
self.not_executable_tr_html = (
'<TR>'
'<TD CLASS="l">109</TD>'
'<TD> </TD>'
'</TR>'
)
self.tr_with_extra_a_tag = (
'<TR CLASS="z">'
'<TD CLASS="l">'
'<A name="1f">54</A>'
'</TD>'
'<TD> }</TD>'
'</TR>'
)
def testInit(self):
emma_dir = self.emma_dir
parser = emma_coverage_stats._EmmaHtmlParser(emma_dir)
self.assertEqual(parser._base_dir, emma_dir)
self.assertEqual(parser._emma_files_path, 'fake/dir/_files')
self.assertEqual(parser._index_path, 'fake/dir/index.html')
def testFindElements_basic(self):
read_values = [self.simple_html]
found, _ = MockOpenForFunction(self.parser._FindElements, read_values,
file_path='fake', xpath_selector='.//TD')
self.assertIs(type(found), list)
self.assertIs(type(found[0]), ElementTree.Element)
self.assertEqual(found[0].text, 'Test HTML')
def testFindElements_multipleElements(self):
multiple_trs = self.not_executable_tr_html + self.covered_tr_html
read_values = ['<div>' + multiple_trs + '</div>']
found, _ = MockOpenForFunction(self.parser._FindElements, read_values,
file_path='fake', xpath_selector='.//TR')
self.assertEquals(2, len(found))
def testFindElements_noMatch(self):
read_values = [self.simple_html]
found, _ = MockOpenForFunction(self.parser._FindElements, read_values,
file_path='fake', xpath_selector='.//TR')
self.assertEqual(found, [])
def testFindElements_badFilePath(self):
with self.assertRaises(IOError):
with mock.patch('os.path.exists', return_value=False):
self.parser._FindElements('fake', xpath_selector='//tr')
def testGetPackageNameToEmmaFileDict_basic(self):
expected_dict = {
'org.chromium.chrome.browser.AccessibilityUtil.java':
'fake/dir/_files/23.html',
'org.chromium.chrome.browser.ContextualMenuBar.java':
'fake/dir/_files/22.html',
'org.chromium.chrome.browser.tabmodel.IntentHelper.java':
'fake/dir/_files/1e.html',
'org.chromium.chrome.browser.ContentSetting.java':
'fake/dir/_files/1f.html',
'org.chromium.chrome.browser.DevToolsServer.java':
'fake/dir/_files/20.html',
'org.chromium.chrome.browser.NavigationPopup.java':
'fake/dir/_files/24.html',
'org.chromium.chrome.browser.FileProviderHelper.java':
'fake/dir/_files/21.html'}
read_values = [self.index_html, self.package_1_class_list_html,
self.package_2_class_list_html]
return_dict, mock_open = MockOpenForFunction(
self.parser.GetPackageNameToEmmaFileDict, read_values)
self.assertDictEqual(return_dict, expected_dict)
self.assertEqual(mock_open.call_count, 3)
calls = [mock.call('fake/dir/index.html'),
mock.call('fake/dir/_files/1.html'),
mock.call('fake/dir/_files/0.html')]
mock_open.assert_has_calls(calls)
def testGetPackageNameToEmmaFileDict_noPackageElements(self):
self.parser._FindElements = mock.Mock(return_value=[])
return_dict = self.parser.GetPackageNameToEmmaFileDict()
self.assertDictEqual({}, return_dict)
def testGetLineCoverage_status_basic(self):
line_coverage = self.GetLineCoverageWithFakeElements([self.covered_tr_html])
self.assertEqual(line_coverage[0].covered_status,
emma_coverage_stats.COVERED)
def testGetLineCoverage_status_statusMissing(self):
line_coverage = self.GetLineCoverageWithFakeElements(
[self.not_executable_tr_html])
self.assertEqual(line_coverage[0].covered_status,
emma_coverage_stats.NOT_EXECUTABLE)
def testGetLineCoverage_fractionalCoverage_basic(self):
line_coverage = self.GetLineCoverageWithFakeElements([self.covered_tr_html])
self.assertEqual(line_coverage[0].fractional_line_coverage, 1.0)
def testGetLineCoverage_fractionalCoverage_partial(self):
line_coverage = self.GetLineCoverageWithFakeElements(
[self.partially_covered_tr_html])
self.assertEqual(line_coverage[0].fractional_line_coverage, 0.78)
def testGetLineCoverage_lineno_basic(self):
line_coverage = self.GetLineCoverageWithFakeElements([self.covered_tr_html])
self.assertEqual(line_coverage[0].lineno, 110)
def testGetLineCoverage_lineno_withAlternativeHtml(self):
line_coverage = self.GetLineCoverageWithFakeElements(
[self.tr_with_extra_a_tag])
self.assertEqual(line_coverage[0].lineno, 54)
def testGetLineCoverage_source(self):
self.parser._FindElements = mock.Mock(
return_value=[ElementTree.fromstring(self.covered_tr_html)])
line_coverage = self.parser.GetLineCoverage('fake_path')
self.assertEqual(line_coverage[0].source,
' if (mSelectors.get(index) != null) {')
def testGetLineCoverage_multipleElements(self):
line_coverage = self.GetLineCoverageWithFakeElements(
[self.covered_tr_html, self.partially_covered_tr_html,
self.tr_with_extra_a_tag])
self.assertEqual(len(line_coverage), 3)
def GetLineCoverageWithFakeElements(self, html_elements):
"""Wraps GetLineCoverage so mock HTML can easily be used.
Args:
html_elements: List of strings each representing an HTML element.
Returns:
A list of LineCoverage objects.
"""
elements = [ElementTree.fromstring(string) for string in html_elements]
with mock.patch('emma_coverage_stats._EmmaHtmlParser._FindElements',
return_value=elements):
return self.parser.GetLineCoverage('fake_path')
class _EmmaCoverageStatsTest(unittest.TestCase):
"""Tests for _EmmaCoverageStats."""
def setUp(self):
self.good_source_to_emma = {
'/path/to/1/File1.java': '/emma/1.html',
'/path/2/File2.java': '/emma/2.html',
'/path/2/File3.java': '/emma/3.html'
}
self.line_coverage = [
emma_coverage_stats.LineCoverage(
1, '', emma_coverage_stats.COVERED, 1.0),
emma_coverage_stats.LineCoverage(
2, '', emma_coverage_stats.COVERED, 1.0),
emma_coverage_stats.LineCoverage(
3, '', emma_coverage_stats.NOT_EXECUTABLE, 1.0),
emma_coverage_stats.LineCoverage(
4, '', emma_coverage_stats.NOT_COVERED, 1.0),
emma_coverage_stats.LineCoverage(
5, '', emma_coverage_stats.PARTIALLY_COVERED, 0.85),
emma_coverage_stats.LineCoverage(
6, '', emma_coverage_stats.PARTIALLY_COVERED, 0.20)
]
self.lines_for_coverage = [1, 3, 5, 6]
with mock.patch('emma_coverage_stats._EmmaHtmlParser._FindElements',
return_value=[]):
self.simple_coverage = emma_coverage_stats._EmmaCoverageStats(
'fake_dir', {})
def testInit(self):
coverage_stats = self.simple_coverage
self.assertIsInstance(coverage_stats._emma_parser,
emma_coverage_stats._EmmaHtmlParser)
self.assertIsInstance(coverage_stats._source_to_emma, dict)
def testNeedsCoverage_withExistingJavaFile(self):
test_file = '/path/to/file/File.java'
with mock.patch('os.path.exists', return_value=True):
self.assertTrue(
emma_coverage_stats._EmmaCoverageStats.NeedsCoverage(test_file))
def testNeedsCoverage_withNonJavaFile(self):
test_file = '/path/to/file/File.c'
with mock.patch('os.path.exists', return_value=True):
self.assertFalse(
emma_coverage_stats._EmmaCoverageStats.NeedsCoverage(test_file))
def testNeedsCoverage_fileDoesNotExist(self):
test_file = '/path/to/file/File.java'
with mock.patch('os.path.exists', return_value=False):
self.assertFalse(
emma_coverage_stats._EmmaCoverageStats.NeedsCoverage(test_file))
def testGetPackageNameFromFile_basic(self):
test_file_text = """// Test Copyright
package org.chromium.chrome.browser;
import android.graphics.RectF;"""
result_package, _ = MockOpenForFunction(
emma_coverage_stats._EmmaCoverageStats.GetPackageNameFromFile,
[test_file_text], file_path='/path/to/file/File.java')
self.assertEqual(result_package, 'org.chromium.chrome.browser.File.java')
def testGetPackageNameFromFile_noPackageStatement(self):
result_package, _ = MockOpenForFunction(
emma_coverage_stats._EmmaCoverageStats.GetPackageNameFromFile,
['not a package statement'], file_path='/path/to/file/File.java')
self.assertIsNone(result_package)
def testGetSummaryStatsForLines_basic(self):
covered, total = self.simple_coverage.GetSummaryStatsForLines(
self.line_coverage)
self.assertEqual(covered, 3.05)
self.assertEqual(total, 5)
def testGetSourceFileToEmmaFileDict(self):
package_names = {
'/path/to/1/File1.java': 'org.fake.one.File1.java',
'/path/2/File2.java': 'org.fake.File2.java',
'/path/2/File3.java': 'org.fake.File3.java'
}
package_to_emma = {
'org.fake.one.File1.java': '/emma/1.html',
'org.fake.File2.java': '/emma/2.html',
'org.fake.File3.java': '/emma/3.html'
}
with mock.patch('os.path.exists', return_value=True):
coverage_stats = self.simple_coverage
coverage_stats._emma_parser.GetPackageNameToEmmaFileDict = mock.MagicMock(
return_value=package_to_emma)
coverage_stats.GetPackageNameFromFile = lambda x: package_names[x]
result_dict = coverage_stats._GetSourceFileToEmmaFileDict(
package_names.keys())
self.assertDictEqual(result_dict, self.good_source_to_emma)
def testGetCoverageDictForFile(self):
line_coverage = self.line_coverage
self.simple_coverage._emma_parser.GetLineCoverage = lambda x: line_coverage
self.simple_coverage._source_to_emma = {'/fake/src': 'fake/emma'}
lines = self.lines_for_coverage
expected_dict = {
'absolute': {
'covered': 3.05,
'total': 5
},
'incremental': {
'covered': 2.05,
'total': 3
},
'source': [
{
'line': line_coverage[0].source,
'coverage': line_coverage[0].covered_status,
'changed': True,
'fractional_coverage': line_coverage[0].fractional_line_coverage,
},
{
'line': line_coverage[1].source,
'coverage': line_coverage[1].covered_status,
'changed': False,
'fractional_coverage': line_coverage[1].fractional_line_coverage,
},
{
'line': line_coverage[2].source,
'coverage': line_coverage[2].covered_status,
'changed': True,
'fractional_coverage': line_coverage[2].fractional_line_coverage,
},
{
'line': line_coverage[3].source,
'coverage': line_coverage[3].covered_status,
'changed': False,
'fractional_coverage': line_coverage[3].fractional_line_coverage,
},
{
'line': line_coverage[4].source,
'coverage': line_coverage[4].covered_status,
'changed': True,
'fractional_coverage': line_coverage[4].fractional_line_coverage,
},
{
'line': line_coverage[5].source,
'coverage': line_coverage[5].covered_status,
'changed': True,
'fractional_coverage': line_coverage[5].fractional_line_coverage,
}
]
}
result_dict = self.simple_coverage.GetCoverageDictForFile(
'/fake/src', lines)
self.assertDictEqual(result_dict, expected_dict)
def testGetCoverageDictForFile_emptyCoverage(self):
expected_dict = {
'absolute': {'covered': 0, 'total': 0},
'incremental': {'covered': 0, 'total': 0},
'source': []
}
self.simple_coverage._emma_parser.GetLineCoverage = lambda x: []
self.simple_coverage._source_to_emma = {'fake_dir': 'fake/emma'}
result_dict = self.simple_coverage.GetCoverageDictForFile('fake_dir', {})
self.assertDictEqual(result_dict, expected_dict)
def testGetCoverageDictForFile_missingCoverage(self):
self.simple_coverage._source_to_emma = {}
result_dict = self.simple_coverage.GetCoverageDictForFile('fake_file', {})
self.assertIsNone(result_dict)
def testGetCoverageDict_basic(self):
files_for_coverage = {
'/path/to/1/File1.java': [1, 3, 4],
'/path/2/File2.java': [1, 2]
}
self.simple_coverage._source_to_emma = {
'/path/to/1/File1.java': 'emma_1',
'/path/2/File2.java': 'emma_2'
}
coverage_info = {
'emma_1': [
emma_coverage_stats.LineCoverage(
1, '', emma_coverage_stats.COVERED, 1.0),
emma_coverage_stats.LineCoverage(
2, '', emma_coverage_stats.PARTIALLY_COVERED, 0.5),
emma_coverage_stats.LineCoverage(
3, '', emma_coverage_stats.NOT_EXECUTABLE, 1.0),
emma_coverage_stats.LineCoverage(
4, '', emma_coverage_stats.COVERED, 1.0)
],
'emma_2': [
emma_coverage_stats.LineCoverage(
1, '', emma_coverage_stats.NOT_COVERED, 1.0),
emma_coverage_stats.LineCoverage(
2, '', emma_coverage_stats.COVERED, 1.0)
]
}
expected_dict = {
'files': {
'/path/2/File2.java': {
'absolute': {'covered': 1, 'total': 2},
'incremental': {'covered': 1, 'total': 2},
'source': [{'changed': True, 'coverage': 0,
'line': '', 'fractional_coverage': 1.0},
{'changed': True, 'coverage': 1,
'line': '', 'fractional_coverage': 1.0}]
},
'/path/to/1/File1.java': {
'absolute': {'covered': 2.5, 'total': 3},
'incremental': {'covered': 2, 'total': 2},
'source': [{'changed': True, 'coverage': 1,
'line': '', 'fractional_coverage': 1.0},
{'changed': False, 'coverage': 2,
'line': '', 'fractional_coverage': 0.5},
{'changed': True, 'coverage': -1,
'line': '', 'fractional_coverage': 1.0},
{'changed': True, 'coverage': 1,
'line': '', 'fractional_coverage': 1.0}]
}
},
'patch': {'incremental': {'covered': 3, 'total': 4}}
}
# Return the relevant coverage info for each file.
self.simple_coverage._emma_parser.GetLineCoverage = (
lambda x: coverage_info[x])
result_dict = self.simple_coverage.GetCoverageDict(files_for_coverage)
self.assertDictEqual(result_dict, expected_dict)
def testGetCoverageDict_noCoverage(self):
result_dict = self.simple_coverage.GetCoverageDict({})
self.assertDictEqual(result_dict, EMPTY_COVERAGE_STATS_DICT)
class EmmaCoverageStatsGenerateCoverageReport(unittest.TestCase):
"""Tests for GenerateCoverageReport."""
def testGenerateCoverageReport_missingJsonFile(self):
with self.assertRaises(IOError):
with mock.patch('os.path.exists', return_value=False):
emma_coverage_stats.GenerateCoverageReport('', '', '')
def testGenerateCoverageReport_invalidJsonFile(self):
with self.assertRaises(ValueError):
with mock.patch('os.path.exists', return_value=True):
MockOpenForFunction(emma_coverage_stats.GenerateCoverageReport, [''],
line_coverage_file='', out_file_path='',
coverage_dir='')
def MockOpenForFunction(func, side_effects, **kwargs):
"""Allows easy mock open and read for callables that open multiple files.
Will mock the python open function in a way such that each time read() is
called on an open file, the next element in |side_effects| is returned. This
makes it easier to test functions that call open() multiple times.
Args:
func: The callable to invoke once mock files are setup.
side_effects: A list of return values for each file to return once read.
Length of list should be equal to the number calls to open in |func|.
**kwargs: Keyword arguments to be passed to |func|.
Returns:
A tuple containing the return value of |func| and the MagicMock object used
to mock all calls to open respectively.
"""
mock_open = mock.mock_open()
mock_open.side_effect = [mock.mock_open(read_data=side_effect).return_value
for side_effect in side_effects]
with mock.patch('__builtin__.open', mock_open):
return func(**kwargs), mock_open
if __name__ == '__main__':
# Suppress logging messages.
unittest.main(buffer=True)