Prevent error from being raised when user is not trying to update a

disabled env role

We were only checking to see if a role was disabled or deleted before
raising an error, so I added in a check to see if the user was trying to
update the env role before raising an error. The error should only be
raised if the role is disabled or deleted AND the user is trying to
assign a new role to the env role.

I also added in a disabled property to the EnvironmentRole model to make
things more readable.

tests/domain/test_environment_roles.py

@@ -88,7 +88,7 @@ def test_disable_completed(application_role, environment):
 
     environment_role = EnvironmentRoles.disable(environment_role.id)
 
-    assert environment_role.status == EnvironmentRole.Status.DISABLED
+    assert environment_role.disabled
 
 
 def test_get_for_update(application_role, environment):

tests/domain/test_environments.py

@@ -42,21 +42,26 @@ def test_update_env_role_no_access():
         env_role.application_role.id, env_role.environment.id
     )
     assert env_role.role is None
-    assert env_role.status == EnvironmentRole.Status.DISABLED
+    assert env_role.disabled
 
 
 def test_update_env_role_disabled_role():
     env_role = EnvironmentRoleFactory.create(role=CSPRole.BASIC_ACCESS.value)
     Environments.update_env_role(env_role.environment, env_role.application_role, None)
 
+    # An exception should be raised when a new role is passed to Environments.update_env_role
     with pytest.raises(DisabledError):
         Environments.update_env_role(
             env_role.environment,
             env_role.application_role,
             CSPRole.TECHNICAL_READ.value,
         )
+
     assert env_role.role is None
-    assert env_role.status == EnvironmentRole.Status.DISABLED
+    assert env_role.disabled
+
+    # An exception should not be raised when no new role is passed
+    Environments.update_env_role(env_role.environment, env_role.application_role, None)
 
 
 def test_get_excludes_deleted():

tests/routes/applications/test_settings.py

@@ -563,7 +563,7 @@ def test_update_member(client, user_session, session):
     # check that the user has roles in the correct envs
     assert len(environment_roles) == 3
     assert updated_role.role == CSPRole.TECHNICAL_READ.value
-    assert suspended_role.status == EnvironmentRole.Status.DISABLED
+    assert suspended_role.disabled
 
 
 def test_revoke_invite(client, user_session):