External test plugin for cmd2. Allows for external invocation of commands as if from a cmd2 pyscript
cmd2 External Test Plugin
Table of Contents
This plugin supports testing of a cmd2 application by exposing access cmd2 commands with the same context as from within a cmd2 pyscript. This allows for verification of an application's support for pyscripts.
Example cmd2 Application
The following short example shows how to mix in the external test plugin to create a fixture for testing your cmd2 application.
Define your cmd2 application
import cmd2 class ExampleApp(cmd2.Cmd): """An class to show how to use a plugin""" def __init__(self, *args, **kwargs): # gotta have this or neither the plugin or cmd2 will initialize super().__init__(*args, **kwargs) def do_something(self, arg): self.last_result = 5 self.poutput('this is the something command')
Defining the test fixture
In your test, define a fixture for your cmd2 application
import cmd2_ext_test import pytest class ExampleAppTester(cmd2_ext_test.ExternalTestMixin, ExampleApp): def __init__(self, *args, **kwargs): # gotta have this or neither the plugin or cmd2 will initialize super().__init__(*args, **kwargs) @pytest.fixture def example_app(): app = ExampleAppTester() app.fixture_setup() yield app app.fixture_teardown()
Now write your tests that validate your application using the
app_cmd function to access
the cmd2 application's commands. This allows invocation of the application's commands in the
same format as a user would type. The results from calling a command matches what is returned
from running an python script with cmd2's pyscript command, which provides stdout, stderr, and
the command's result data.
from cmd2 import CommandResult def test_something(example_app): # execute a command out = example_app.app_cmd("something") # validate the command output and result data assert isinstance(out, CommandResult) assert str(out.stdout).strip() == 'this is the something command' assert out.data == 5
cmd2 uses the very liberal MIT license. We invite plugin authors to consider doing the same.
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