Edit: test_popen.py
import subprocess from subprocess import PIPE, STDOUT from unittest import TestCase from testfixtures.mock import call from testfixtures import ShouldRaise, compare, Replacer from testfixtures.popen import MockPopen, PopenBehaviour from testfixtures.compat import PY_310_PLUS import signal class Tests(TestCase): def test_command_min_args(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE) # process started, no return code compare(process.pid, 1234) compare(None, process.returncode) out, err = process.communicate() # test the rest compare(out, b'') compare(err, b'') compare(process.returncode, 0) # test call list compare([ call.Popen('a command', stderr=-1, stdout=-1), call.Popen_instance.communicate(), ], Popen.mock.method_calls) def test_command_max_args(self): Popen = MockPopen() Popen.set_command('a command', b'out', b'err', 1, 345) process = Popen('a command', stdout=PIPE, stderr=PIPE) compare(process.pid, 345) compare(None, process.returncode) out, err = process.communicate() # test the rest compare(out, b'out') compare(err, b'err') compare(process.returncode, 1) # test call list compare([ call.Popen('a command', stderr=-1, stdout=-1), call.Popen_instance.communicate(), ], Popen.mock.method_calls) def test_callable_default_behaviour(self): def some_callable(command, stdin): return PopenBehaviour(bytes(command, 'ascii'), bytes(stdin, 'ascii'), 1, 345, 0) Popen = MockPopen() Popen.set_default(behaviour=some_callable) process = Popen('a command', stdin='some stdin', stdout=PIPE, stderr=PIPE) compare(process.pid, 345) out, err = process.communicate() compare(out, b'a command') compare(err, b'some stdin') compare(process.returncode, 1) def test_command_is_sequence(self): Popen = MockPopen() Popen.set_command('a command') process = Popen(['a', 'command'], stdout=PIPE, stderr=PIPE) compare(process.wait(), 0) compare([ call.Popen(['a', 'command'], stderr=-1, stdout=-1), call.Popen_instance.wait(), ], Popen.mock.method_calls) def test_communicate_with_input(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) out, err = process.communicate('foo') # test call list compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.communicate('foo'), ], Popen.mock.method_calls) def test_communicate_with_timeout(self): Popen = MockPopen() Popen.set_command('a command', returncode=3) process = Popen('a command') process.communicate(timeout=1) process.communicate('foo', 1) compare([ call.Popen('a command'), call.Popen_instance.communicate(timeout=1), call.Popen_instance.communicate('foo', 1), ], expected=Popen.mock.method_calls) def test_read_from_stdout(self): # setup Popen = MockPopen() Popen.set_command('a command', stdout=b'foo') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) self.assertTrue(isinstance(process.stdout.fileno(), int)) compare(process.stdout.read(), b'foo') # test call list compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), ], Popen.mock.method_calls) def test_read_from_stderr(self): # setup Popen = MockPopen() Popen.set_command('a command', stderr=b'foo') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) self.assertTrue(isinstance(process.stdout.fileno(), int)) compare(process.stderr.read(), b'foo') # test call list compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), ], Popen.mock.method_calls) def test_read_from_stdout_with_stderr_redirected_check_stdout_contents(self): # setup Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=STDOUT, shell=True) # test stdout contents compare(b'foobar', process.stdout.read()) compare(process.stderr, None) def test_read_from_stdout_with_stderr_redirected_check_stdout_stderr_interleaved(self): # setup Popen = MockPopen() Popen.set_command('a command', stdout=b'o1\no2\no3\no4\n', stderr=b'e1\ne2\n') # usage process = Popen('a command', stdout=PIPE, stderr=STDOUT, shell=True) self.assertTrue(isinstance(process.stdout.fileno(), int)) # test stdout contents compare(b'o1\ne1\no2\ne2\no3\no4\n', process.stdout.read()) def test_communicate_with_stderr_redirected_check_stderr_is_none(self): # setup Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=STDOUT, shell=True) out, err = process.communicate() # test stderr is None compare(out, b'foobar') compare(err, None) def test_read_from_stdout_and_stderr(self): # setup Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) compare(process.stdout.read(), b'foo') compare(process.stderr.read(), b'bar') # test call list compare([ call.Popen('a command', shell=True, stderr=PIPE, stdout=PIPE), ], Popen.mock.method_calls) def test_communicate_text_mode(self): Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, text=True) actual = process.communicate() # check compare(actual, expected=(u'foo', u'bar')) def test_communicate_universal_newlines(self): Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, universal_newlines=True) actual = process.communicate() # check compare(actual, expected=(u'foo', u'bar')) def test_communicate_encoding(self): Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, encoding='ascii') actual = process.communicate() # check compare(actual, expected=(u'foo', u'bar')) def test_communicate_encoding_with_errors(self): Popen = MockPopen() Popen.set_command('a command', stdout=b'\xa3', stderr=b'\xa3') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, encoding='ascii', errors='ignore') actual = process.communicate() # check compare(actual, expected=(u'', u'')) def test_read_from_stdout_and_stderr_text_mode(self): Popen = MockPopen() Popen.set_command('a command', stdout=b'foo', stderr=b'bar') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, text=True) actual = process.stdout.read(), process.stderr.read() # check compare(actual, expected=(u'foo', u'bar')) def test_write_to_stdin(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdin=PIPE, shell=True) process.stdin.write('some text') # test call list compare(Popen.mock.method_calls, expected=[ call.Popen('a command', shell=True, stdin=PIPE), call.Popen_instance.stdin.write('some text'), ]) compare(Popen.all_calls, expected=[ call.Popen('a command', shell=True, stdin=PIPE), call.Popen('a command', shell=True, stdin=PIPE).stdin.write('some text'), ]) compare(process.mock.method_calls, expected=[ call.stdin.write('some text'), ]) compare(process.calls, expected=[ call.stdin.write('some text'), ]) repr(call.stdin.write('some text')) def test_wait_and_return_code(self): # setup Popen = MockPopen() Popen.set_command('a command', returncode=3) # usage process = Popen('a command') compare(process.returncode, None) # result checking compare(process.wait(), 3) compare(process.returncode, 3) # test call list compare([ call.Popen('a command'), call.Popen_instance.wait(), ], Popen.mock.method_calls) def test_wait_timeout(self): Popen = MockPopen() Popen.set_command('a command', returncode=3) process = Popen('a command') process.wait(timeout=1) process.wait(1) compare([ call.Popen('a command'), call.Popen_instance.wait(timeout=1), call.Popen_instance.wait(1) ], expected=Popen.mock.method_calls) def test_multiple_uses(self): Popen = MockPopen() Popen.set_command('a command', b'a') Popen.set_command('b command', b'b') process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) out, err = process.communicate('foo') compare(out, b'a') process = Popen(['b', 'command'], stdout=PIPE, stderr=PIPE, shell=True) out, err = process.communicate('foo') compare(out, b'b') compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.communicate('foo'), call.Popen(['b', 'command'], shell=True, stderr=-1, stdout=-1), call.Popen_instance.communicate('foo'), ], Popen.mock.method_calls) def test_send_signal(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) process.send_signal(0) # result checking compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.send_signal(0), ], Popen.mock.method_calls) def test_terminate(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) process.terminate() # result checking compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.terminate(), ], Popen.mock.method_calls) def test_kill(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) process.kill() # result checking compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.kill(), ], Popen.mock.method_calls) def test_all_signals(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command') process.send_signal(signal.SIGINT) process.terminate() process.kill() # test call list compare([ call.Popen('a command'), call.Popen_instance.send_signal(signal.SIGINT), call.Popen_instance.terminate(), call.Popen_instance.kill(), ], Popen.mock.method_calls) def test_poll_no_setup(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) compare(process.poll(), None) compare(process.poll(), None) compare(process.wait(), 0) compare(process.poll(), 0) # result checking compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.poll(), call.Popen_instance.poll(), call.Popen_instance.wait(), call.Popen_instance.poll(), ], Popen.mock.method_calls) def test_poll_setup(self): # setup Popen = MockPopen() Popen.set_command('a command', poll_count=1) # usage process = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) compare(process.poll(), None) compare(process.poll(), 0) compare(process.wait(), 0) compare(process.poll(), 0) # result checking compare([ call.Popen('a command', shell=True, stderr=-1, stdout=-1), call.Popen_instance.poll(), call.Popen_instance.poll(), call.Popen_instance.wait(), call.Popen_instance.poll(), ], Popen.mock.method_calls) def test_poll_until_result(self): # setup Popen = MockPopen() Popen.set_command('a command', returncode=3, poll_count=2) # example usage process = Popen('a command') while process.poll() is None: # you'd probably have a sleep here, or go off and # do some other work. pass # result checking compare(process.returncode, 3) compare([ call.Popen('a command'), call.Popen_instance.poll(), call.Popen_instance.poll(), call.Popen_instance.poll(), ], Popen.mock.method_calls) def test_command_not_specified(self): Popen = MockPopen() with ShouldRaise(KeyError( "Nothing specified for command 'a command'" )): Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) def test_default_command_min_args(self): # setup Popen = MockPopen() Popen.set_default() # usage process = Popen('a command', stdout=PIPE, stderr=PIPE) # process started, no return code compare(process.pid, 1234) compare(None, process.returncode) out, err = process.communicate() # test the rest compare(out, b'') compare(err, b'') compare(process.returncode, 0) # test call list compare([ call.Popen('a command', stderr=-1, stdout=-1), call.Popen_instance.communicate(), ], Popen.mock.method_calls) def test_default_command_max_args(self): Popen = MockPopen() Popen.set_default(b'out', b'err', 1, 345) process = Popen('a command', stdout=PIPE, stderr=PIPE) compare(process.pid, 345) compare(None, process.returncode) out, err = process.communicate() # test the rest compare(out, b'out') compare(err, b'err') compare(process.returncode, 1) # test call list compare([ call.Popen('a command', stderr=-1, stdout=-1), call.Popen_instance.communicate(), ], Popen.mock.method_calls) def test_invalid_parameters(self): message = "__init__() got an unexpected keyword argument 'foo'" if PY_310_PLUS: message = "MockPopenInstance." + message Popen = MockPopen() with ShouldRaise(TypeError(message)): Popen(foo='bar') def test_invalid_method_or_attr(self): Popen = MockPopen() Popen.set_command('command') process = Popen('command') with ShouldRaise(AttributeError): process.foo() def test_invalid_attribute(self): Popen = MockPopen() Popen.set_command('command') process = Popen('command') with ShouldRaise(AttributeError): process.foo def test_invalid_communicate_call(self): message = "communicate() got an unexpected keyword argument 'foo'" if PY_310_PLUS: message = "MockPopenInstance." + message Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') with ShouldRaise(TypeError(message)): process.communicate(foo='bar') def test_invalid_wait_call(self): message = "wait() got an unexpected keyword argument 'foo'" if PY_310_PLUS: message = "MockPopenInstance." + message Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') with ShouldRaise(TypeError(message)): process.wait(foo='bar') def test_invalid_send_signal(self): message = "send_signal() got an unexpected keyword argument 'foo'" if PY_310_PLUS: message = "MockPopenInstance." + message Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') with ShouldRaise(TypeError(message)): process.send_signal(foo='bar') def test_invalid_terminate(self): message = "terminate() got an unexpected keyword argument 'foo'" if PY_310_PLUS: message = "MockPopenInstance." + message Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') with ShouldRaise(TypeError(message)): process.terminate(foo='bar') def test_invalid_kill(self): Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') text = 'kill() takes 1 positional argument but 2 were given' if PY_310_PLUS: text = "MockPopenInstance." + text with ShouldRaise(TypeError(text)): process.kill('moo') def test_invalid_poll(self): Popen = MockPopen() Popen.set_command('bar') process = Popen('bar') text = 'poll() takes 1 positional argument but 2 were given' if PY_310_PLUS: text = "MockPopenInstance." + text with ShouldRaise(TypeError(text)): process.poll('moo') def test_non_pipe(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage process = Popen('a command') # checks compare(process.stdout, expected=None) compare(process.stderr, expected=None) out, err = process.communicate() # test the rest compare(out, expected=None) compare(err, expected=None) # test call list compare([ call.Popen('a command'), call.Popen_instance.communicate(), ], Popen.mock.method_calls) def test_use_as_context_manager(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage with Popen('a command', stdout=PIPE, stderr=PIPE) as process: # process started, no return code compare(process.pid, 1234) compare(None, process.returncode) out, err = process.communicate() # test the rest compare(out, b'') compare(err, b'') compare(process.returncode, 0) compare(process.stdout.closed, expected=True) compare(process.stderr.closed, expected=True) # test call list compare([ call.Popen('a command', stderr=-1, stdout=-1), call.Popen_instance.communicate(), call.Popen_instance.wait(), ], Popen.mock.method_calls) def test_start_new_session(self): # setup Popen = MockPopen() Popen.set_command('a command') # usage Popen('a command', start_new_session=True) # test call list compare([ call.Popen('a command', start_new_session=True), ], Popen.mock.method_calls) def test_simultaneous_processes(self): Popen = MockPopen() Popen.set_command('a command', b'a', returncode=1) Popen.set_command('b command', b'b', returncode=2) process_a = Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) process_b = Popen(['b', 'command'], stdout=PIPE, stderr=PIPE, shell=True) compare(process_a.wait(), expected=1) compare(process_b.wait(), expected=2) a_call = call.Popen('a command', stdout=PIPE, stderr=PIPE, shell=True) b_call = call.Popen(['b', 'command'], stdout=PIPE, stderr=PIPE, shell=True) compare(Popen.all_calls, expected=[ a_call, b_call, a_call.wait(), b_call.wait(), ]) compare(process_a.mock.method_calls, expected=[ call.wait() ]) compare(process_b.mock.method_calls, expected=[ call.wait() ]) def test_pass_executable(self): Popen = MockPopen() Popen.set_command('a command', b'a', returncode=1) Popen('a command', executable='/foo/bar') compare(Popen.all_calls, expected=[ call.Popen('a command', executable='/foo/bar') ]) def test_set_command_with_list(self): Popen = MockPopen() Popen.set_command(['a', 'command']) Popen(['a', 'command'], stdout=PIPE, stderr=PIPE) compare([call.Popen(['a', 'command'], stderr=-1, stdout=-1)], actual=Popen.all_calls) class IntegrationTests(TestCase): def setUp(self): self.popen = MockPopen() replacer = Replacer() replacer.replace('testfixtures.tests.test_popen.subprocess.Popen', self.popen) self.addCleanup(replacer.restore) def test_command_called_with_check_call_check_returncode(self): self.popen.set_command('ls') compare(0, subprocess.check_call(['ls'])) def test_command_called_with_check_output_check_stdout_returned(self): self.popen.set_command('ls', stdout=b'abc') compare(b'abc', subprocess.check_output(['ls'])) def test_command_called_with_check_output_stderr_to_stdout_check_returned(self): self.popen.set_command('ls', stderr=b'xyz') compare(b'xyz', subprocess.check_output(['ls'], stderr=STDOUT)) def test_command_called_with_check_call_failing_command_check_exception(self): self.popen.set_command('ls', returncode=1) with self.assertRaises(subprocess.CalledProcessError): subprocess.check_output(['ls'])
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