add test for ComputerUpdateForm

computers/tests/test_form.py

@@ -21,3 +21,21 @@ def test_computer_create_form(create_admin_user):
             "customer": fixture['customer'].id}
     form = forms.ComputerCreateForm(user=fixture['admin'], data=data)
     assert form.is_valid() is True, ("Should be valid with the given data.")
+
+
+def test_computer_update_form(create_admin_user):
+    fixture = create_admin_user()
+    form = forms.ComputerUpdateForm(user=fixture['admin'], data={})
+    assert form.is_valid() is False, (
+        "Should be false because no data was given")
+
+    data = {"name": "novartis-pc1",
+            "customer": 3}
+    form = forms.ComputerUpdateForm(user=fixture['admin'], data=data)
+    assert form.is_valid() is False, (
+        "Should be false because the customer doesn't exist.")
+
+    data = {"name": "novartis-pc1",
+            "customer": fixture['customer'].id}
+    form = forms.ComputerUpdateForm(user=fixture['admin'], data=data)
+    assert form.is_valid() is True, ("Should be valid with the given data.")