Handle undefined metadata so tests dont break

jupyterlab · Aug 14, 2018 · 5e6667c · 5e6667c
1 parent e9ac1b1
commit 5e6667c
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/packages/cells/src/widget.ts b/packages/cells/src/widget.ts
@@ -803,10 +803,15 @@ export namespace CodeCell {
     return OutputArea.execute(code, cell.outputArea, session, metadata)
       .then(msg => {
         model.executionCount = msg.content.execution_count;
-        model.metadata.set('timing.execute_reply_started', msg.metadata
-          .started as string);
-        model.metadata.set('timing.execute_reply_sent', msg.header
-          .date as string);
+        const started = msg.metadata.started as string;
+        if (started) {
+          model.metadata.set('timing.execute_reply_started', started);
+        }
+        const date = msg.header.date as string;
+        if (date) {
+          model.metadata.set('timing.execute_reply_sent', date);
+        }
+
         return msg;
       })
       .catch(e => {