Add a autouse fixture to skip unsupported devices

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.24.0] - 2024-09-24
+
+### Added
+- conftest: Added a autouse fixture to skip unsupported devices
+
 ## [1.23.0] - 2024-07-25
 
 ### Changed

src/ragger/conftest/base_conftest.py

@@ -73,6 +73,23 @@ def root_pytest_dir(request) -> Path:
     return Path(request.config.rootpath).resolve()
 
 
+@pytest.fixture(scope="session")
+def supported_devices(root_pytest_dir: Path) -> List[str]:
+    project_root_dir = find_project_root_dir(root_pytest_dir)
+    manifest = Manifest.from_path(project_root_dir / "ledger_app.toml")
+    return ["nanosp" if d == "nanos+" else d for d in manifest.app.devices.json]
+
+
+@pytest.fixture(scope="session", autouse=True)
+def skip_tests_for_unsupported_devices(request, supported_devices: List[str]):
+    # We could request firmware as a fixture but that would fail on tests of the Speculos interface
+    # Instead we 'soft-request' firmware and do nothing if it is missing
+    if 'firmware' in request.fixturenames:
+        firmware = request.getfixturevalue('firmware')
+        if firmware.name not in supported_devices:
+            pytest.skip(f"Device {firmware.name} is not supported according to the manifest")
+
+
 @pytest.fixture(autouse="session")
 def default_screenshot_path(root_pytest_dir: Path) -> Path:
     # Alias reflecting the use case to avoid exposing internal helper fixtures
@@ -213,9 +230,11 @@ def create_backend(root_pytest_dir: Path, backend_name: str, firmware: Firmware,
 
 
 # Backend scope can be configured by the user
+# fixture skip_tests_for_unsupported_devices is a dependency because we want to skip the test
+# before trying to find the binary
 @pytest.fixture(scope=conf.OPTIONAL.BACKEND_SCOPE)
-def backend(root_pytest_dir: Path, backend_name: str, firmware: Firmware, display: bool,
-            log_apdu_file: Optional[Path], cli_user_seed: str,
+def backend(skip_tests_for_unsupported_devices, root_pytest_dir: Path, backend_name: str,
+            firmware: Firmware, display: bool, log_apdu_file: Optional[Path], cli_user_seed: str,
             additional_speculos_arguments: List[str]) -> Generator[BackendInterface, None, None]:
     with create_backend(root_pytest_dir, backend_name, firmware, display, log_apdu_file,
                         cli_user_seed, additional_speculos_arguments) as b: