feat(base): add support for manytomany for model unit tests

ref: #804 #799

app/centurion/tests/unit_models.py

@@ -110,7 +110,44 @@ class ModelTestCases(
 
         else:
 
-            instance = model.objects.create( **model_kwargs )
+
+            kwargs = {}
+
+            many_field = {}
+
+            for field, value in model_kwargs.items():
+
+                if isinstance(getattr(model, field).field, models.ManyToManyField):
+
+                    if field in many_field:
+
+                        many_field[field] += [ value ]
+
+                    else:
+
+                        many_field.update({
+                            field: [
+                                value
+                            ]
+                        })
+
+                    continue
+
+                kwargs.update({
+                    field: value
+                })
+
+            instance = model.objects.create( **kwargs )
+
+
+
+            for field, values in many_field.items():
+
+                for value in values:
+
+                    getattr(instance, field).add( value )
+
+
 
         yield instance