A Python module for using the Specmatic Library.
Project description
This is a Python library to run the Specmatic.
Specmatic is a contract driven development tool that allows us to turn OpenAPI contracts into executable specifications.
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The specmatic python library is geared towards integrating Specmatic capabilities in PyTest tests.
It provides three main functions:- The ability to start and stop a python flask app in a test class
- The ability to run specmatic in test mode against a local contract/spec file, or against a spec defined in a Central Contract Repository (as defined in specmatic.json).
- The ability to stub out an api dependency using the specmatic stub feature.
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To run Specmatic in test mode against a flask app, add the start_flask_app and specmatic_contract_test decorator functions on your test class:
@specmatic_contract_test(host, port) @start_flask_app(app, host, port) class TestApiContract: @classmethod def teardown_class(cls): cls.flask_server.stop()
- The @start_flask_app decorator adds an attribute 'flask_server' on the test class, which can be used in the teardown method to stop the flask app.
- The @start_flask_app accepts an instance of your flask app and the host/port to run it on.
- The @specmatic_contract_test accepts host/port of your flask app and the path to the specmatic.json file in your project.
- Specmatic will look for a specmatic.json file in your project root directory. If you don't wish to use specmatic.json, you can also pass the path to the actual contract/specification file to the specmatic_contract_test decorator.
- You can run this test class either from your IDE or from command line (from your project root directory) :
pytest test -v -s
Click here to learn more about Specmatic test mode.
NOTE: If you are using an IDE like PyCharm to run tests, please edit the test configuration and set the working directory to your project root directory.
- If you want to stub out a service dependency, add the specmatic_stub decorator on top of the start_flask_app.
@specmatic_contract_test(host, port) @start_flask_app(app, host, port) @specmatic_stub(stub_host, stub_port, [expectation_json_file]) class TestApiContract: @classmethod def teardown_class(cls): cls.flask_server.stop() cls.stub.stop()
- The specmatic_stub decorator adds an attribute 'stub' on the test class, which can be used in the teardown method to stop the stub process.
- The @specmatic_stub accepts host/port on which the dependency is expected to be running.
- It also accepts a list of expectation json file paths which can be used to return stubbed responses.
- The Specmatic stub will look for a specmatic.json file in your project root directory. If you don't wish to use specmatic.json, you can also pass the path to the actual contract/specification file to the specmatic_stub decorator.
- Run this test class either from your IDE or from command line (from your project root directory) :
pytest test -v -s
Click here to learn more about Specmatic stub mode and using expectation json files.
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