[nrf fromtree] twister: harness: pytest: list available fixtures in device config

Pass the list of supported twister fixtures for a given platform to pytest
via DeviceConfig. This allows for the pytest suites to use knowledge of the
fixtures for test suite configuration.

Signed-off-by: Henrik Brix Andersen <[email protected]>
(cherry picked from commit a7d55cf)

Author: henrikbrixandersen

scripts/pylib/pytest-twister-harness/src/twister_harness/plugin.py

@@ -117,6 +117,10 @@ def pytest_addoption(parser: pytest.Parser):
         choices=('function', 'class', 'module', 'package', 'session'),
         help='The scope for which `dut` and `shell` fixtures are shared.'
     )
+    twister_harness_group.addoption(
+        '--twister-fixture', action='append', dest='fixtures', metavar='FIXTURE', default=[],
+        help='Twister fixture supported by this platform. May be given multiple times.'
+    )
 
 
 def pytest_configure(config: pytest.Config):

scripts/pylib/pytest-twister-harness/src/twister_harness/twister_harness_config.py

@@ -33,6 +33,7 @@ class DeviceConfig:
     pre_script: Path | None = None
     post_script: Path | None = None
     post_flash_script: Path | None = None
+    fixtures: list[str] = None
     app_build_dir: Path | None = None
 
     def __post_init__(self):
@@ -77,6 +78,7 @@ def create(cls, config: pytest.Config) -> TwisterHarnessConfig:
             pre_script=_cast_to_path(config.option.pre_script),
             post_script=_cast_to_path(config.option.post_script),
             post_flash_script=_cast_to_path(config.option.post_flash_script),
+            fixtures=config.option.fixtures,
         )
 
         devices.append(device_from_cli)

scripts/pylib/twister/twisterlib/harness.py

@@ -354,6 +354,10 @@ def generate_command(self):
         else:
             raise PytestHarnessException(f'Support for handler {handler.type_str} not implemented yet')
 
+        if handler.type_str != 'device':
+            for fixture in handler.options.fixture:
+                command.append(f'--twister-fixture={fixture}')
+
         if handler.options.pytest_args:
             command.extend(handler.options.pytest_args)
             if pytest_args_yaml:
@@ -411,6 +415,9 @@ def _generate_parameters_for_hardware(self, handler: Handler):
         if hardware.flash_before:
             command.append(f'--flash-before={hardware.flash_before}')
 
+        for fixture in hardware.fixtures:
+            command.append(f'--twister-fixture={fixture}')
+
         return command
 
     def run_command(self, cmd, timeout):

scripts/tests/twister/pytest_integration/test_harness_pytest.py

@@ -26,6 +26,7 @@ def testinstance() -> TestInstance:
     testinstance.handler = mock.Mock()
     testinstance.handler.options = mock.Mock()
     testinstance.handler.options.verbose = 1
+    testinstance.handler.options.fixture = ['fixture1:option1', 'fixture2']
     testinstance.handler.options.pytest_args = None
     testinstance.handler.type_str = 'native'
     return testinstance
@@ -42,7 +43,9 @@ def test_pytest_command(testinstance: TestInstance, device_type):
         'samples/hello/pytest',
         f'--build-dir={testinstance.build_dir}',
         f'--junit-xml={testinstance.build_dir}/report.xml',
-        f'--device-type={device_type}'
+        f'--device-type={device_type}',
+        '--twister-fixture=fixture1:option1',
+        '--twister-fixture=fixture2'
     ]
 
     command = pytest_harness.generate_command()

scripts/tests/twister/test_harness.py

@@ -345,6 +345,7 @@ def test_pytest__generate_parameters_for_hardware(tmp_path, pty_value, hardware_
     hardware.baud = 115200
     hardware.runner = "runner"
     hardware.runner_params = ["--runner-param1", "runner-param2"]
+    hardware.fixtures = ['fixture1:option1', 'fixture2']
 
     options = handler.options
     options.west_flash = "args"
@@ -386,6 +387,8 @@ def test_pytest__generate_parameters_for_hardware(tmp_path, pty_value, hardware_
         assert '--pre-script=pre_script' in command
         assert '--post-flash-script=post_flash_script' in command
         assert '--post-script=post_script' in command
+        assert '--twister-fixture=fixture1:option1' in command
+        assert '--twister-fixture=fixture2' in command
 
 
 def test__update_command_with_env_dependencies():