rotest 2.7.6

Resource oriented testing framework

Rotest is a resource oriented testing framework, for writing system or integration tests.

Rotest is based on Python’s unittest module and on the Django framework. It enables defining simple abstracted components in the system, called resources. The resources may be DUT (devices under test) or they may help the test process. The tests look very much like tests written using the builtin module unittest.

Why Use Rotest?

• Allowing teams to share resources without interfering with one another.

• Easily abstracting automated components in the system.

• Lots of useful features: multiprocess, filtering tests, variety of output handlers (and the ability to create custom ones), and much more.

Examples

For a complete step-by-step explanation about the framework, you can read our documentation at Read The Docs. If you just want to see how it looks, read further.

For our example, let’s look at an example for a Calculator resource:

import os
import rpyc
from django.db import models
from rotest.management import base_resource
from rotest.management.models import resource_data


class CalculatorData(resource_data.ResourceData):
    class Meta:
        app_label = "resources"

    ip_address = models.IPAddressField()


class Calculator(base_resource.BaseResource):
    DATA_CLASS = CalculatorData

    PORT = 1357
    EXECUTABLE_PATH = os.path.join(os.path.expanduser("~"),
                                   "calc.py")

    def connect(self):
        self._rpyc = rpyc.classic.connect(self.data.ip_address,
                                          self.PORT)

    def calculate(self, expression):
        result = self._rpyc.modules.subprocess.check_output(
            ["python", self.EXECUTABLE_PATH, expression])
        return int(result.strip())

    def finalize(self):
        if self._rpyc is not None:
            self._rpyc.close()
            self._rpyc = None

The CalculatorData class is a standard Django model that exposes IP address of the calculator machine through the data attribute. Also, we’re using rpyc for automating the access to those machines. Except from that, it’s easy to notice how the connect method is making the connection to the machine, and how the finalize method is cleaning afterwards.

Now, an example for a test:

from rotest.core.runner import main
from rotest.core.case import TestCase, request


class SimpleCalculationTest(TestCase):
    resources = [request("calculator", Calculator)]

    def test_simple_calculation(self):
        self.assertEqual(self.calculator.calculate("1+2"), 3)


if __name__ == "__main__":
    main(SimpleCalculationTest)

The test can include the setUp and tearDown methods of unittest as well, and it differs only in the request for resources. The request includes the target member name, the requested class and might include more parameters for finding the suitable resource.

Following, those are the options exposed when running the test:

$ python test.py --help
Usage: test.py [options]

Options:
  -h, --help            show this help message and exit
  -c CONFIG_PATH, --config-path=CONFIG_PATH
                        Tests' configuration file path
  -s, --save-state      Enable save state
  -d DELTA_ITERATIONS, --delta-iterations=DELTA_ITERATIONS
                        Enable run of unsuccessful tests only, enter the
                        number of times the failed tests should run
  -p PROCESSES, --processes=PROCESSES
                        Use multiprocess test runner
  -o OUTPUTS, --outputs=OUTPUTS
                        Output handlers separated by comma. Options: dots,
                        xml, full, remote, tree, excel, db, artifact,
                        signature, loginfo, logdebug
  -f FILTER, --filter=FILTER
                        Run only tests that match the filter expression, e.g
                        "Tag1* and not Tag13"
  -n RUN_NAME, --name=RUN_NAME
                        Assign run name
  -l, --list            Print the tests hierarchy and quit
  -F, --failfast        Stop the run on first failure
  -D, --debug           Enter ipdb debug mode upon any test exception
  -S, --skip-init       Skip initialization and validation of resources
  -r RESOURCES, --resources=RESOURCES
                        Specific resources to request by name