test: add test for dispatch against each plugin

tests/unit/utils/test_beamline_dispatch.py

@@ -0,0 +1,48 @@
+import importlib
+from unittest.mock import patch
+
+import pytest
+
+from aare.beamline_dispatch.beamline_dispatch import get_beamline_dispatch
+from aare.beamline_dispatch.simulated import SimulatedDispatch
+from aare.beamline_dispatch.x06da.beamline_dispatch import X06daDispatch
+from aare.beamline_dispatch.x06sa import X06saDispatch
+from aare.beamline_dispatch.x10sa import X10saDispatch
+
+
+def test_dispatch_cannot_be_instantiated_without_env():
+    with patch.dict("os.environ", {}, clear=True):
+        with pytest.raises(ValueError) as e:
+            _ = get_beamline_dispatch()
+    assert e.match("Please set the BEAMLINE environment variable")
+
+
+def test_simulated_dispatch_can_be_instantiated():
+    with patch.dict("os.environ", {"BEAMLINE": "SIMULATED"}):
+        dispatch = get_beamline_dispatch()
+        assert isinstance(dispatch, SimulatedDispatch)
+
+
+@pytest.mark.skipif(importlib.util.find_spec("pxi_bec") is None, reason="run only for pxi flavour")
+def test_pxi_dispatch_can_be_instantiated():
+    with patch.dict("os.environ", {"BEAMLINE": "X06SA"}):
+        dispatch = get_beamline_dispatch()
+        assert isinstance(dispatch, X06saDispatch)
+
+
+@pytest.mark.skipif(
+    importlib.util.find_spec("pxii_bec") is None, reason="run only for pxii flavour"
+)
+def test_pxii_dispatch_can_be_instantiated():
+    with patch.dict("os.environ", {"BEAMLINE": "X10SA"}):
+        dispatch = get_beamline_dispatch()
+        assert isinstance(dispatch, X10saDispatch)
+
+
+@pytest.mark.skipif(
+    importlib.util.find_spec("pxiii_bec") is None, reason="run only for pxiii flavour"
+)
+def test_pxiii_dispatch_can_be_instantiated():
+    with patch.dict("os.environ", {"BEAMLINE": "X06DA"}):
+        dispatch = get_beamline_dispatch()
+        assert isinstance(dispatch, X06daDispatch)