timfjord / UnitTesting

Testing Sublime Text Packages

UnitTesting

This is a unittest framework for Sublime Text. It runs unittest testcases on local machines and via Github Actions. It also supports testing syntax_test files for the new sublime-syntax format and sublime-color-scheme files.

Sublime Text 4

Sublime Text 4 is now supported and testing works for Python 3.8 packages. Though test coverage wouldn't work until Package Control adds support of Python 3.8 package dependencies.

Preparation

1. Before testing anything, you have to install UnitTesting via Package Control.
2. Your package!
3. TestCases should be placed in test*.py under the directory tests (configurable, see below). The testcases are then loaded by TestLoader.discover.

Here are some small examples

Running Tests Locally

UnitTesting can be triggered via the command palette command UnitTesting. Enter the package name in the input panel and hit enter, a console should pop up and the tests should be running. To run only tests in particular files, enter <Package name>:<filename>. <filename> should be a unix shell wildcard to match the file names, <Package name>:test*.py is used in default.

You could run the command UnitTesting: Test Current Package to run the current package. The current package will be first reloaded by UnitTesting and then the tests will be executed.

It is also possible to generate test coverage report via coverage by using the command UnitTesting: Test Current Package with Coverage. The file .coveragerc is used to control the coverage configurations. If it is missing, UnitTesting will ignore the tests directory.

GitHub Actions

Basic: put the following in your workflow.

name: test

on: [push, pull_request]

jobs:
  run-tests:
    strategy:
      fail-fast: false
      matrix:
        st-version: [3, 4]
        os: ["ubuntu-latest", "macOS-latest", "windows-latest"]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v2
      - uses: SublimeText/UnitTesting/actions/setup@v1
        with:
          sublime-text-version: ${{ matrix.st-version }}
      - uses: SublimeText/UnitTesting/actions/run-tests@v1
        with:
          coverage: true
      - uses: codecov/codecov-action@v3

Remarks: actions are released in the branch v1. Minor changes will be pushed to the same branch unless there are breaking changes.

Testing syntax_test files

name: test-syntax

on: [push, pull_request]

jobs:
  run-syntax-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: SublimeText/UnitTesting/actions/setup@v1
      - uses: SublimeText/UnitTesting/actions/run-syntax-tests@v1

Check this for an example.

Deferred testing

Tests can be written using the Deferrable testcase, such that you are able to run sublime commands from your test cases and yield control to sublime text runtime and continue the execution later. Would be useful to test asynchronous codes. The idea was inspired by Plugin UnitTest Harness.

DeferrableTestCase is used to write the test cases. They are executed by the DeferringTextTestRunner and the runner expects not only regular test functions, but also generators. If the test function is a generator, it does the following

• if the yielded object is a callable, the runner will evaluate the callable and check its returned value. If the result is not None, the runner continues the generator, if not, the runner will wait until the condition is met with the default timeout of 4s. The result of the callable can be also retrieved from the yield statement. The yielded object could be also a dictionary of the form {"condition": callable, timeout: timeout} to specify timeout in ms.

• if the yielded object is an integer, say x, then it will continue the generator after x ms.

• yield AWAIT_WORKER would yield to a task in the worker thread.

• otherwise, a single yield would yield to a task in the main thread.

An example would be found in here.

Options

UnitTesting could be configured by providing the following settings in unittesting.json

name	description	default value
tests_dir	the name of the directory containing the tests	"tests"
pattern	the pattern to discover tests	"test*.py"
deferred	whether to use deferred test runner	true
verbosity	verbosity level	2
output	name of the test output instead of showing in the panel	nil
show_reload_progress	self explained	true
reload_package_on_testing	reloading package will increase coverage rate	true
start_coverage_after_reload	self explained, irrelevent if reload_package_on_testing is false	false
coverage_on_worker_thread	(experimental)	false
generate_html_report	generate coverage report for coverage	false
capture_console	capture stdout and stderr in the test output	false
failfast	stop early if a test fails	false

Others

Add Test Current Package build

It is recommended to add the following in your .sublime-project file so that c+b would invoke the testing action.

"build_systems":
[
  {
    "name": "Test Current Package",
    "target": "unit_testing_current_package",
  }
]

Credits

Thanks guillermooo and philippotto for their early efforts in AppVeyor and Travis CI macOS support (though these services are not supported now).