Bug 1226565 - Test that update-parse-status 404s for a non-existent id

We're about to change the implementation of update_parse_status; this
test will ensure trying to update the status for a non-existent
job_log_url record will still result in a 404 response.

tests/webapp/api/test_job_log_url.py

@@ -0,0 +1,15 @@
+import pytest
+from webtest.app import AppError
+
+from treeherder.client import TreeherderClient
+
+
+def test_update_parse_status_nonexistent_id(test_project, mock_post_json):
+    """
+    Attempting to update the parse status for a non-existent log should return a 404.
+    """
+    client = TreeherderClient(protocol='http', host='localhost')
+    non_existent_id = 9999999
+    with pytest.raises(AppError) as e:
+        client.update_parse_status(test_project, non_existent_id, 'parsed')
+    assert "404 NOT FOUND" in str(e.value)