The following is a first draft of a unit-testing tutorial. It will form
the basis of a new help-for-unit-testing command, and may also become the
introduction to Leo unit-testing chapter.
All comments are welcome. Please let me know if anything is unclear.
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Leo makes it easy to create and run unit tests from individual outline
nodes or trees.
A node whose headline starts with @tests defines a unit test.
The body text of the @test node contains a **self-contained** unit test.
For example, this creates a complete unit test::
@test fails (headline)
assert False (body text)
To run this test, select the @test node and do:
<alt-x>run-selected-unit-tests-locally.
Leo will create and run the unit test automatically.
To see all of Leo's unit testing commands, do:
<alt-x>run<tab>
Leo pre-defines 'c', 'g' and 'p' in unit tests just as in scripts.
For more details about unit testing, see:
http://leoeditor.com/unitTesting.html
**Notes for Leo developers**
leo/test/unitTest.leo contains all of Leo's own unit tests.
Running all tests is not necessary. Just select::
Active Unit Tests
and then do Alt-4 (run-selected-unit-tests-locally).
**Note**: Some tests will likely fail on machines other than EKR's.
You only need to be concerned about unit tests that start failing after you
make your changes.
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