我有一些运行一系列测试的unittest代码。以前,当每个测试运行时,一些信息将打印到stdout。如果测试失败,此信息将极大地帮助调试。现在我想编写一个更复杂的程序来调用unittest并以编程方式捕获测试结果。看来unittest提供了一个名为TestResult的对象,它意味着包含测试的输出。它有一个所有错误的列表,所有失败的列表等。我还想将我的调试输出添加到这个对象,以便我可以稍后以编程方式访问它。这可能吗?
编辑:这是一个例子:
import unittest2
class DemoTest(unittest2.TestCase):
def test_one(self):
print "'grimelsome' attribute of 'smoxy' was set to 'blimpy'"
self.assertTrue(True)
def test_two(self):
print "'smithereen' attribute of 'brouhaha' was set to 'False'"
self.assertTrue(True)
if __name__ == '__main__':
suite = unittest2.TestLoader().loadTestsFromTestCase(DemoTest)
result = unittest2.TextTestRunner(verbosity=2).run(suite)
# this is what I'd like to be able to do:
for fail in result.failures:
print what_would_have_gone_to_stdout
答案 0 :(得分:0)
您只需要使用TextTestRunner缓冲区选项:
import unittest2
class DemoTest(unittest2.TestCase):
def test_one(self):
print "'grimelsome' attribute of 'smoxy' was set to 'blimpy'"
self.assertTrue(True)
def test_two(self):
print "'smithereen' attribute of 'brouhaha' was set to 'False'"
self.assertTrue(False)
if __name__ == '__main__':
suite = unittest2.TestLoader().loadTestsFromTestCase(DemoTest)
result = unittest2.TextTestRunner(verbosity=2, buffer=True).run(suite)
在每次测试之前,由跑步者使用的TextTestResult
将使用自己的流替换sys.stderr
和sys.stdout
,并且只有在测试失败或丢弃时才将内容发送到原始流否则。
请注意,因为假的sys.std*
流在每次测试后都会发生变化,如果您想对日志输出执行相同的操作,则必须在更换sys.sdt *流后添加日志记录处理程序,在每次测试之前或实现自己的处理程序。
这是一个子类化logging.StreamHandler
的示例:
import logging
import sys
import unittest2
class DemoTest(unittest2.TestCase):
logger = logging.getLogger('DemoTest')
def setUp(self):
self.logger.debug("setting up stuff and logging it...")
def teardown(self):
self.logger.debug("You won't see me")
print "me neither"
def test_one(self):
self.logger.debug("'grimelsome' attribute of 'smoxy' was set to 'blimpy'")
self.assertTrue(True)
def test_two(self):
self.logger.debug("'smithereen' attribute of 'brouhaha' was set to 'False'")
self.assertTrue(False)
class TestHandler(logging.StreamHandler):
def __init__(self):
logging.Handler.__init__(self)
@property
def stream(self):
"""Use which ever stream sys.stderr is referencing."""
return sys.stderr
if __name__ == '__main__':
formatter = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
logger_handler = TestHandler()
logger_handler.setFormatter(formatter)
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
logger.addHandler(logger_handler)
suite = unittest2.TestLoader().loadTestsFromTestCase(DemoTest)
result = unittest2.TextTestRunner(
verbosity=2, buffer=True, resultclass=TestResult
).run(suite)