[QI2-1437] Add command for getting backend information (#177)

Author: Mythir

quantuminspire/cli/command_list.py

@@ -56,6 +56,23 @@ def list_backend_types() -> None:
     console.print(table)
 
 
+@backend_types_app.command("get")
+def get_backend_types(backend_type_id: int = typer.Argument(..., help="The id of the backend type")) -> None:
+    """Get a backend.
+
+    Get the configuration of a specific backend.
+    """
+    backend = RemoteBackend()
+    backend_types = backend.get_backend_types().items
+
+    backend_type = next((bt for bt in backend_types if bt.id == backend_type_id), None)
+    if backend_type is None:
+        console.print(f"Backend type with id {backend_type_id} not found.")
+        raise typer.Exit(1)
+    else:
+        console.print(backend_type.model_dump())
+
+
 def load_algorithm_from_file(file_path: Path) -> FileAlgorithm:
     """Load an algorithm from a file."""
     if file_path.suffix == ".py":

tests/cli/test_command_list.py

@@ -1,6 +1,7 @@
 from unittest.mock import MagicMock
 
 from compute_api_client import BackendStatus, JobStatus
+from pydantic import BaseModel
 from pytest_mock import MockerFixture
 from typer.testing import CliRunner
 
@@ -34,6 +35,38 @@ class MockBackendType:
     mock_remote_backend_inst.get_backend_types.assert_called_once()
 
 
+def test_backend_get(mocker: MockerFixture) -> None:
+    class MockBackendType(BaseModel):
+        id: int = 1
+        name: str = "Mock backend"
+
+    mock_remote_backend_inst = MagicMock()
+    paginated_mock = MagicMock()
+
+    paginated_mock.items = [MockBackendType()]
+    mock_remote_backend_inst.get_backend_types.return_value = paginated_mock
+    mocker.patch("quantuminspire.cli.command_list.RemoteBackend", return_value=mock_remote_backend_inst)
+
+    result = runner.invoke(app, ["backends", "get", "1"])
+
+    assert result.exit_code == 0
+    mock_remote_backend_inst.get_backend_types.assert_called_once()
+
+
+def test_backend_get_no_backend(mocker: MockerFixture) -> None:
+    mock_remote_backend_inst = MagicMock()
+    paginated_mock = MagicMock()
+
+    paginated_mock.items = []
+    mock_remote_backend_inst.get_backend_types.return_value = paginated_mock
+    mocker.patch("quantuminspire.cli.command_list.RemoteBackend", return_value=mock_remote_backend_inst)
+
+    result = runner.invoke(app, ["backends", "get", "1"])
+
+    assert result.exit_code == 1
+    mock_remote_backend_inst.get_backend_types.assert_called_once()
+
+
 def test_file_upload_hybrid(mocker: MockerFixture) -> None:
     mock_remote_backend_inst = MagicMock()
     mocker.patch("quantuminspire.cli.command_list.RemoteBackend", return_value=mock_remote_backend_inst)