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tests/README.md: add paragraph explaining expect()

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Kaspar Schleiser 2020-02-11 16:48:06 +01:00
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commit 981cdeaa47
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tests/README.md
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@ -85,6 +85,17 @@ pattern like `\r\n`, `\s`, `\)`, etc..
child.expect(r'some string: (\d+) ,')
~~~
Use expect() instead of assert()
--------------------------------
In order to make a test application functional in all cases, use `expect()`
instead of `assert()`. The former works like the latter, but will still be
compiled in if `NDEBUG` is defined. This is useful to keep a test application
working even when compiling with -DNDEBUG, allowing for the code-under-test to
be compiled with that flag. Otherwise, the application would force compiling
all tested code with assertions enabled.
`expect()` is defined in the header `test_utils/expect.h`.
Interaction through the uart
----------------------------