Tests in MicroPython are located at the path
tests/. The following is a listing of
key directories and the run-tests runner script:
. ├── basics ├── extmod ├── float ├── micropython ├── run-tests ...
There are subfolders maintained to categorize the tests. Add a test by creating a new file in one of the existing folders or in a new folder. It’s also possible to make custom tests outside this tests folder, which would be recommended for a custom port.
For example, add the following code in a file
print.py in the
def print_one(): print(1) print_one()
If you run your tests, this test should appear in the test output:
$ cd ports/unix $ make tests skip unix/extra_coverage.py pass unix/ffi_callback.py pass unix/ffi_float.py pass unix/ffi_float2.py pass unix/print.py pass unix/time.py pass unix/time2.py
Tests are run by comparing the output from the test target against the output from CPython. So any test should use print statements to indicate test results.
For tests that can’t be compared to CPython (i.e. micropython-specific functionality),
you can provide a
.py.exp file which will be used as the truth for comparison.
The other way to run tests, which is useful when running on targets other than the Unix port, is:
$ cd tests $ ./run-tests
Then to run on a board:
$ ./run-tests --target minimal --device /dev/ttyACM0
And to run only a certain set of tests (eg a directory):
$ ./run-tests -d basics $ ./run-tests float/builtin*.py