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Testing framework for Sublime Text plugins

Project description


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Testing framework for Sublime Text plugins

This was built to create a platform to test plugins against multiple versions of Sublime Text.

Screenshot of tests running

Deprecation notice

We have decided to deprecate sublime-plugin-tests in favor of randy3k/UnitTesting.

It has greater platform support and a less brittle design for local development.

Getting Started

Install the module with: pip install sublime_plugin_tests

Then, write your tests:

# Load in test framework
from sublime_plugin_tests import framework

# Define a TestCase
class TestLeftDelete(framework.TestCase):
    def test_left_delete_single(self):
        # Each test function *must* return Python with a `run` function
        # `run` will be run inside Sublime Text. Perform your assertions etc there.
        return """
# Use ScratchView utility provided by `sublime_plugin_tests`
  from utils.scratch_view import ScratchView
except ImportError:
  from .utils.scratch_view import ScratchView

def run():
  # Generate new scratch file
  scratch_view = ScratchView()
      # Update the content and selection `ab|c`
      scratch_view.set_sel([(2, 2)])

      # Delete one character to the left `a|c

      # Assert the current content
      assert scratch_view.get_content() == 'ac'
      # No matter what happens, close the view
$ # Run tests via nosetests
$ nosetests
Ran 1 test in 0.076s


Travis CI integration

To run your tests against Sublime Text 2/3 in Travis CI, put this in your .travis.yml:

language: python
  - "2.7"

  # Install Sublime Text and output version
  - curl | sh -s $SUBLIME_TEXT_VERSION
  - subl --version

  # Install dev dependencies
  - pip install sublime-plugin-tests

  # Install our plugin
  - mkdir -p '~/.config/sublime-text-'$SUBLIME_TEXT_VERSION'/Packages/'
  - ln -s $PWD '~/.config/sublime-text-'$SUBLIME_TEXT_VERSION'/Packages/YOUR_PLUGIN_NAME'

  # Generate a screen buffer to collect Sublime Text window
  - export DISPLAY=:99.0
  - sh -e /etc/init.d/xvfb start

  # Ensure the scripts self-terminate

  # Run our tests
  - nosetests --nocapture --verbose --stop


sublime-plugin-tests consists of two pieces: test framework code (outside Sublime Text) and test helpers (inside Sublime Text).

The test framework code is run in your normal development environment (e.g. where nosetests lives). The test helpers live inside of Sublime text to make your testing life easier.

Test framework


TestCase extends Python’s unittest.TestCase. Tests can be skipped and set up/torn down as you normally would.

It is expected that each test case returns test_str, a String that is run inside of the context of Sublime Text. Additionally, it will have access to the test helpers.

test_str must have a run function such that we can hook into it.

class TestLeftDelete(TestCase):
    def test_left_delete_single(self):
        return """
import sublime

def run():
    # I am run inside of Sublime Text
    assert sublime.active_window().active_view()

Test helpers


sublime_plugin_tests.utils.split_selection break up a string by selection markers into content and selection.

@param {String} input Python to parse selection indicators out of
@returns {Dictionary} ret_obj Container for selection and content
@return {List} ret_obj['selection'] List of tuples for start/end position of selections
@return {String} ret_obj['content'] Python with selection characters removed


def abc|():


  'content': """
def abc():
  'selection': [(7, 7), (18, 18)]

utils.scratch_view.ScratchView is a class for creating a temporary view to work on. This is meant to run in the context of Sublime Text and not in the framework.

When initialized, Sublime Text will open a new file in the active window (not saved to local disk). When you are done, it is strongly encouraged to run ScratchView#destroy to clean up your Sublime Text window.

# Open temporary file inside of Sublime Text's active window
tmp_view = ScratchView()

Run a command in the context of a ScratchView. The function signature is the same as in the Sublime Text documentation.

# Run `left_delete` command inside of `tmp_view`
ScratchView#set_content, #get_content, #clear_content

Methods to adjust the content of a ScratchView.

# `set_content` replaces all of the content.
tmp_view.set_content('Hello World!')

# `get_content` returns the current content.
tmp_view.get_content() # 'Hello World!'

# `clear_content` deletes all of the content.
ScratchView#set_sel, #get_sel, #clear_sel

Methods to adjust the selection of a ScratchView.

# `set_sel` replaces the selection.
# For convenience, tuples and lists are coerced to `sublime.Region`.
tmp_view.set_sel([(6, 6), (7, 7)])

# `get_sel` returns the current selection.
tmp_view.get_sel() # RegionSet([Region(6, 6), Region(7, 7)])

# `clear_sel` deselects everything.

Closes scratch view for clean up. This also guarantees no pop-up will be run when closing.

# Close `tmp_view`

If you would like to access the underlying sublime.View, it can be accessed via the view attr.

tmp_view.view # sublime.View instance


Framework takes each test function, wraps it in a test harness, runs it, and asserts whether the harness saw an error or not.

The test harness generates a temporary Sublime Text plugin which runs your test in the context of Sublime. This harness is launched via a CLI invocation of Sublime Text.

The output and assertions of each test function are reported back to nosetests which prints to stdout and exits.


In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Test via ./

If you would like to headlessly run the tests, this repository can be used with Vagrant.

Currently, it is only configured for Sublime Text 3.
$ vagrant up
[default] Importing base box 'precise64'...
$ vagrant ssh
vagrant@precise64:~$ cd /vagrant
vagrant@precise64:/vagrant$ ./
Ran 3 tests in 2.651s



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As of Sep 05 2013, Todd Wolfson has released this repository and its contents to the public domain.

It has been released under the UNLICENSE.

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