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Diffstat (limited to '')
| -rw-r--r-- | testing/mozbase/mozdevice/tests/conftest.py | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/testing/mozbase/mozdevice/tests/conftest.py b/testing/mozbase/mozdevice/tests/conftest.py new file mode 100644 index 0000000000..831090a428 --- /dev/null +++ b/testing/mozbase/mozdevice/tests/conftest.py @@ -0,0 +1,236 @@ +import sys +from random import randint, seed +from unittest.mock import patch + +import mozdevice +import pytest +from six import StringIO + +# set up required module-level variables/objects +seed(1488590) + + +def random_tcp_port(): + """Returns a pseudo-random integer generated from a seed. + + :returns: int: pseudo-randomly generated integer + """ + return randint(8000, 12000) + + +@pytest.fixture(autouse=True) +def mock_command_output(monkeypatch): + """Monkeypatches the ADBDevice.command_output() method call. + + Instead of calling the concrete method implemented in adb.py::ADBDevice, + this method simply returns a string representation of the command that was + received. + + As an exception, if the command begins with "forward tcp:0 ", this method + returns a mock port number. + + :param object monkeypatch: pytest provided fixture for mocking. + """ + + def command_output_wrapper(object, cmd, timeout): + """Actual monkeypatch implementation of the command_output method call. + + :param object object: placeholder object representing ADBDevice + :param str cmd: command to be executed + :param timeout: unused parameter to represent timeout threshold + :returns: string - string representation of command to be executed + int - mock port number (only used when cmd begins with "forward tcp:0 ") + """ + + if cmd[0] == "forward" and cmd[1] == "tcp:0": + return 7777 + + print(str(cmd)) + return str(cmd) + + monkeypatch.setattr(mozdevice.ADBDevice, "command_output", command_output_wrapper) + + +@pytest.fixture(autouse=True) +def mock_shell_output(monkeypatch): + """Monkeypatches the ADBDevice.shell_output() method call. + + Instead of returning the output of an adb call, this method will + return appropriate string output. Content of the string output is + in line with the calling method's expectations. + + :param object monkeypatch: pytest provided fixture for mocking. + """ + + def shell_output_wrapper( + object, cmd, env=None, cwd=None, timeout=None, enable_run_as=False + ): + """Actual monkeypatch implementation of the shell_output method call. + + :param object object: placeholder object representing ADBDevice + :param str cmd: command to be executed + :param env: contains the environment variable + :type env: dict or None + :param cwd: The directory from which to execute. + :type cwd: str or None + :param timeout: unused parameter tp represent timeout threshold + :param enable_run_as: bool determining if run_as <app> is to be used + :returns: string - string representation of a simulated call to adb + """ + if "pm list package error" in cmd: + return "Error: Could not access the Package Manager" + elif "pm list package none" in cmd: + return "" + elif "pm list package" in cmd: + apps = ["org.mozilla.fennec", "org.mozilla.geckoview_example"] + return ("package:{}\n" * len(apps)).format(*apps) + else: + print(str(cmd)) + return str(cmd) + + monkeypatch.setattr(mozdevice.ADBDevice, "shell_output", shell_output_wrapper) + + +@pytest.fixture(autouse=True) +def mock_is_path_internal_storage(monkeypatch): + """Monkeypatches the ADBDevice.is_path_internal_storage() method call. + + Instead of returning the outcome of whether the path provided is + internal storage or external, this will always return True. + + :param object monkeypatch: pytest provided fixture for mocking. + """ + + def is_path_internal_storage_wrapper(object, path, timeout=None): + """Actual monkeypatch implementation of the is_path_internal_storage() call. + + :param str path: The path to test. + :param timeout: The maximum time in + seconds for any spawned adb process to complete before + throwing an ADBTimeoutError. This timeout is per adb call. The + total time spent may exceed this value. If it is not + specified, the value set in the ADBDevice constructor is used. + :returns: boolean + + :raises: * ADBTimeoutError + * ADBError + """ + if "internal_storage" in path: + return True + return False + + monkeypatch.setattr( + mozdevice.ADBDevice, + "is_path_internal_storage", + is_path_internal_storage_wrapper, + ) + + +@pytest.fixture(autouse=True) +def mock_enable_run_as_for_path(monkeypatch): + """Monkeypatches the ADBDevice.enable_run_as_for_path(path) method. + + Always return True + + :param object monkeypatch: pytest provided fixture for mocking. + """ + + def enable_run_as_for_path_wrapper(object, path): + """Actual monkeypatch implementation of the enable_run_as_for_path() call. + + :param str path: The path to test. + :returns: boolean + """ + return True + + monkeypatch.setattr( + mozdevice.ADBDevice, "enable_run_as_for_path", enable_run_as_for_path_wrapper + ) + + +@pytest.fixture(autouse=True) +def mock_shell_bool(monkeypatch): + """Monkeypatches the ADBDevice.shell_bool() method call. + + Instead of returning the output of an adb call, this method will + return appropriate string output. Content of the string output is + in line with the calling method's expectations. + + :param object monkeypatch: pytest provided fixture for mocking. + """ + + def shell_bool_wrapper( + object, cmd, env=None, cwd=None, timeout=None, enable_run_as=False + ): + """Actual monkeypatch implementation of the shell_bool method call. + + :param object object: placeholder object representing ADBDevice + :param str cmd: command to be executed + :param env: contains the environment variable + :type env: dict or None + :param cwd: The directory from which to execute. + :type cwd: str or None + :param timeout: unused parameter tp represent timeout threshold + :param enable_run_as: bool determining if run_as <app> is to be used + :returns: string - string representation of a simulated call to adb + """ + print(cmd) + return str(cmd) + + monkeypatch.setattr(mozdevice.ADBDevice, "shell_bool", shell_bool_wrapper) + + +@pytest.fixture(autouse=True) +def mock_adb_object(): + """Patches the __init__ method call when instantiating ADBDevice. + + ADBDevice normally requires instantiated objects in order to execute + its commands. + + With a pytest-mock patch, we are able to mock the initialization of + the ADBDevice object. By yielding the instantiated mock object, + unit tests can be run that call methods that require an instantiated + object. + + :yields: ADBDevice - mock instance of ADBDevice object + """ + with patch.object(mozdevice.ADBDevice, "__init__", lambda self: None): + yield mozdevice.ADBDevice() + + +@pytest.fixture +def redirect_stdout_and_assert(): + """Redirects the stdout pipe temporarily to a StringIO stream. + + This is useful to assert on methods that do not return + a value, such as most ADBDevice methods. + + The original stdout pipe is preserved throughout the process. + + :returns: _wrapper method + """ + + def _wrapper(func, **kwargs): + """Implements the stdout sleight-of-hand. + + After preserving the original sys.stdout, it is switched + to use cStringIO.StringIO. + + Method with no return value is called, and the stdout + pipe is switched back to the original sys.stdout. + + The expected outcome is received as part of the kwargs. + This is asserted against a sanitized output from the method + under test. + + :param object func: method under test + :param dict kwargs: dictionary of function parameters + """ + original_stdout = sys.stdout + sys.stdout = testing_stdout = StringIO() + expected_text = kwargs.pop("text") + func(**kwargs) + sys.stdout = original_stdout + assert expected_text in testing_stdout.getvalue().rstrip() + + return _wrapper |