[Dashboard] Add initial version of new dashboard (#5730)

python/ray/tests/test_webui.py

@@ -3,15 +3,33 @@ from __future__ import division
 from __future__ import print_function
 
 import sys
+import time
+
 import pytest
+import requests
+
 import ray
 
 
 @pytest.mark.skipif(
     sys.version_info < (3, 5, 3), reason="requires python3.5.3 or higher")
-def test_get_webui():
-    addresses = ray.init(include_webui=True)
+def test_get_webui(shutdown_only):
+    addresses = ray.init(include_webui=True, num_cpus=1)
     webui_url = addresses["webui_url"]
-    assert ray.worker.get_webui_url() == webui_url
+    assert ray.get_webui_url() == webui_url
 
-    ray.shutdown()
+    base, token = webui_url.split("?")
+    assert token.startswith("token=")
+
+    start_time = time.time()
+    while True:
+        try:
+            node_info = requests.get(base + "api/node_info?" + token).json()
+            break
+        except requests.exceptions.ConnectionError:
+            if time.time() > start_time + 30:
+                raise Exception(
+                    "Timed out while waiting for dashboard to start.")
+    assert node_info["error"] is None
+    assert node_info["result"] is not None
+    assert isinstance(node_info["timestamp"], float)