samples: subsys: testsuite: pytest: add test of custom cmd line args

Add test case for passing custom command line arguments to a pytest
harness via twister.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

samples/subsys/testsuite/pytest/pytest/conftest.py

@@ -10,9 +10,18 @@ def pytest_addoption(parser):
     parser.addoption(
         '--cmdopt'
     )
+    parser.addoption(
+        '--custom-pytest-arg'
+    )
 
 # define fixture to return value of option "--cmdopt", this fixture
 # will be requested by other fixture of tests.
 @pytest.fixture()
 def cmdopt(request):
     return request.config.getoption('--cmdopt')
+
+# define fixture to return value of option "--custom-pytest-arg", this fixture
+# will be requested by other fixture of tests.
+@pytest.fixture()
+def custom_pytest_arg(request):
+    return request.config.getoption('--custom-pytest-arg')

samples/subsys/testsuite/pytest/pytest/test_sample.py

@@ -33,5 +33,10 @@ def test_case(cmdopt):
     print("run test cases in:")
     print(cmdopt)
 
+def test_custom_arg(custom_pytest_arg):
+    ''' Test passing of custom command line arguments to pytest.
+    '''
+    assert custom_pytest_arg == "foo"
+
 if __name__ == "__main__":
     pytest.main()

samples/subsys/testsuite/pytest/testcase.yaml

@@ -2,4 +2,6 @@ tests:
   sample.twister.pytest:
     platform_allow: native_posix
     harness: pytest
+    harness_config:
+      pytest_args: [ "--custom-pytest-arg", "foo" ]
     tags: testing pytest