test: add test for create_platform when Hardware is used

src/qibolab/_core/dummy/platform.py

@@ -2,14 +2,15 @@
 
 from qibolab._core.components import AcquisitionChannel, DcChannel, IqChannel
 from qibolab._core.instruments.dummy import DummyInstrument, DummyLocalOscillator
+from qibolab._core.parameters import Hardware
 from qibolab._core.platform import Platform
 from qibolab._core.qubits import Qubit
 
 FOLDER = pathlib.Path(__file__).parent
 
 
-def create_dummy() -> Platform:
-    """Create a dummy platform using the dummy instrument."""
+def create_dummy_hardware() -> Hardware:
+    """Create dummy hardware configuration based on the dummy instrument."""
     qubits = {}
     channels = {}
     # attach the channels
@@ -38,6 +39,10 @@ def create_dummy() -> Platform:
         pump_name: DummyLocalOscillator(address="0.0.0.0"),
     }
 
-    return Platform.load(
-        path=FOLDER, instruments=instruments, qubits=qubits, couplers=couplers
-    )
+    return Hardware(instruments=instruments, qubits=qubits, couplers=couplers)
+
+
+def create_dummy() -> Platform:
+    """Create a dummy platform using the dummy instrument."""
+    hardware = create_dummy_hardware()
+    return Platform.load(path=FOLDER, **vars(hardware))

tests/dummy_hardware/platform.py

@@ -0,0 +1,16 @@
+"""Dummy platform to test loading via ``Hardware`` object."""
+
+from pathlib import Path
+
+from qibolab import Hardware, initialize_parameters
+from qibolab._core.dummy.platform import create_dummy_hardware
+from qibolab._core.platform.platform import PARAMETERS
+
+
+def create() -> Hardware:
+    hardware = create_dummy_hardware()
+    parameters = initialize_parameters(hardware=hardware)
+    (Path(__file__).parent / PARAMETERS).write_text(
+        parameters.model_dump_json(indent=4)
+    )
+    return hardware

tests/test_platform.py

@@ -35,6 +35,14 @@ def test_create_platform_error():
         _ = create_platform("nonexistent")
 
 
+def test_create_platform_from_hardware():
+    original_value = os.environ.get(PLATFORMS)
+    os.environ[PLATFORMS] = str(Path(__file__).parent)
+    _ = create_platform("dummy_hardware")
+    os.remove(Path(__file__).parent / "dummy_hardware" / PARAMETERS)
+    os.environ[PLATFORMS] = original_value
+
+
 def test_platform_basics():
     platform = Platform(
         name="ciao",