added unit test for error raised in Reference.plate_map for invalid plate name

Author: dave-doty

tests/test_references.py

@@ -1,3 +1,4 @@
+import pytest
 
 from alhambra_mixes import Reference
 
@@ -17,3 +18,11 @@ def test_idt():
     eq = (dfo == dfp).all()
     print(eq)
     assert eq.loc[["Well", "Sequence", "Concentration (nM)"]].all()
+
+
+def test_raise_error_if_plate_name_not_found():
+    r_order = Reference.compile(("tests/data/holes-order.xlsx", "200 µM"))
+
+    # This should raise an error because the plate name "fake plate name" is not found in the reference
+    with pytest.raises(ValueError):
+        r_order.plate_map("fake plate name")