update tests to hit all cov

Author: bckohan

django_enum/forms.py

@@ -98,7 +98,7 @@ def enum(self, enum):
                         empty for empty in self.empty_values
                         if empty != enum_val
                     ]
-                    if empty == self.empty_value:
+                    if enum_val == self.empty_value:
                         if self.empty_values:
                             self.empty_value = self.empty_values[0]
                         else:

django_enum/tests/tests.py

@@ -2128,6 +2128,7 @@ class EmptyEqEnum(EnumProperties, s('label', case_fold=True), s('prop', match_no
 
                 A = 'A', 'A Label', 4
                 B = 'B', 'B Label', None
+                C = 'C', 'C Label', ''
 
             try:
                 form_field = EnumChoiceField(enum=EmptyEqEnum)
@@ -2137,7 +2138,10 @@ class EmptyEqEnum(EnumProperties, s('label', case_fold=True), s('prop', match_no
                     "empty_value set."
                 )
 
+            # this is pathological
             self.assertTrue(None not in form_field.empty_values)
+            self.assertTrue('' not in form_field.empty_values)
+            self.assertTrue(form_field.empty_value == form_field.empty_values[0])
 
             class EmptyEqEnum2(
                 TextChoices,