begin adding tests for admin form

tests/tests.py

@@ -408,3 +408,8 @@ def test_subtask_list(self):
                     }],
                 'title': 'First Task'}
         ])
+
+
+
+class AdminFormTestCase(APITestCase):
+    pass

umsebenzi/forms.py

@@ -1,13 +1,38 @@
 from django import forms
-from umsebenzi.models import Task
+from umsebenzi.models import Task, Project
 from umsebenzi.latest import get_task_code
+from umsebenzi.enums import Issue
 
 
 class TaskForm(forms.ModelForm):
     class Meta:
         model = Task
         exclude = ('code',)
 
+    def clean(self):
+        """
+        Rules
+        1) If Epic cannot have parent
+        2) Parent task must belong to same project
+        3) If task is subtask parent cannot be subtask
+        """
+        data = super().clean()
+        issue = data['issue']
+        epic: Task = data['parent']
+
+        if issue is Issue.EPIC and epic:
+            raise forms.ValidationError("Epic task cannot have parent")
+
+        if issue is Issue.SUBTASK and epic and epic.issue is Issue.SUBTASK:
+            raise forms.ValidationError("Subtask parent cannot be subtask")
+
+        project: Project = data['project']
+        if epic and project:
+            if epic.project != project:
+                raise forms.ValidationError("Subtask parent(epic) must belong to same project")
+
+        return data
+
     def save(self, commit=True):
         task = super().save(commit=False)
         if not self.instance.id: