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# Copyright (C) 2007 Lars Wirzenius <liw@iki.fi>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import coverage
import unittest
import os
import imp
import sys
import time
class CoverageTestResult(unittest.TestResult):
def __init__(self, output, total):
unittest.TestResult.__init__(self)
self.output = output
self.total = total
self.lastmsg = ""
self.coverage_missed = []
self.timings = []
def addCoverageMissed(self, filename, statements, missed_statements,
missed_description):
self.coverage_missed.append((filename, statements, missed_statements,
missed_description))
def wasSuccessful(self):
return (unittest.TestResult.wasSuccessful(self) and
not self.coverage_missed)
def clearmsg(self):
self.output.write("\b \b" * len(self.lastmsg))
self.lastmsg = ""
def write(self, test):
self.clearmsg()
self.lastmsg = "Running test %d/%d: %s" % (self.testsRun,
self.total,
str(test)[:50])
self.output.write(self.lastmsg)
self.output.flush()
def startTest(self, test):
unittest.TestResult.startTest(self, test)
self.write(test)
self.start_time = time.time()
def stopTest(self, test):
end_time = time.time()
unittest.TestResult.stopTest(self, test)
self.timings.append((end_time - self.start_time, test))
class CoverageTestRunner:
"""A test runner class that insists modules' tests cover them fully."""
def __init__(self):
self._module_pairs = []
def add_pair(self, module_pathname, test_module_pathname):
"""Add a module and its test module to list of tests."""
self._module_pairs.append((module_pathname, test_module_pathname))
def find_pairs(self, dirname):
"""Find all module/test module pairs in directory tree.
This method relies on a naming convention: it scans a directory
tree and assumes that for any file foo.py, if there exists a
file foo_tests.py or fooTests.py, they form a pair.
"""
suffixes = ["_tests.py", "Tests.py"]
for dirname, dirnames, filenames in os.walk(dirname):
tests = []
for filename in filenames:
for suffix in suffixes:
if filename.endswith(suffix):
module = filename[:-len(suffix)] + ".py"
if module in filenames:
module = os.path.join(dirname, module)
filename = os.path.join(dirname, filename)
self.add_pair(module, filename)
def _load_module_from_pathname(self, pathname):
for tuple in imp.get_suffixes():
suffix, mode, type = tuple
if pathname.endswith(suffix):
name = os.path.basename(pathname[:-len(suffix)])
f = file(pathname, mode)
return imp.load_module(name, f, pathname, tuple)
raise Exception("Unknown module: %s" % pathname)
def _load_pairs(self):
module_pairs = []
loader = unittest.defaultTestLoader
for pathname, test_pathname in self._module_pairs:
module = self._load_module_from_pathname(pathname)
test_module = self._load_module_from_pathname(test_pathname)
suite = loader.loadTestsFromModule(test_module)
module_pairs.append((module, test_module, suite))
return module_pairs
def printErrorList(self, flavor, errors):
for test, error in errors:
print "%s: %s" % (flavor, str(test))
print str(error)
def run(self):
start_time = time.time()
module_pairs = self._load_pairs()
total_tests = sum(suite.countTestCases()
for x, y, suite in module_pairs)
result = CoverageTestResult(sys.stdout, total_tests)
for module, test_module, suite in module_pairs:
coverage.erase()
coverage.start()
sys.path.insert(0, os.path.dirname(module.__file__))
reload(module)
del sys.path[0]
suite.run(result)
coverage.stop()
filename, stmts, missed, missed_desc = coverage.analysis(module)
if missed:
result.addCoverageMissed(filename, stmts, missed, missed_desc)
end_time = time.time()
sys.stdout.write("\n\n")
if result.wasSuccessful():
print "OK"
else:
print "FAILED"
print
if result.errors:
self.printErrorList("ERROR", result.errors)
if result.failures:
self.printErrorList("FAILURE", result.failures)
if result.coverage_missed:
print
print "Statements missed by per-module tests:"
width = max(len(x[0]) for x in result.coverage_missed)
fmt = " %-*s %s"
print fmt % (width, "Module", "Missed statements")
for filename, _, _, desc in sorted(result.coverage_missed):
print fmt % (width, filename, desc)
print
print "%d failures, %d errors" % (len(result.failures),
len(result.errors))
if end_time - start_time > 10:
print
print "Slowest tests:"
for secs, test in sorted(result.timings)[-10:]:
print " %5.1f s %s" % (secs, str(test)[:70])
print "Time: %.1f s" % (end_time - start_time)
return result
def run(dirname="."):
"""Use CoverageTestRunner on the desired directory."""
runner = CoverageTestRunner()
runner.find_pairs(dirname)
result = runner.run()
if not result.wasSuccessful():
sys.exit(1)
if __name__ == "__main__":
run()
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