turbaszek commented on a change in pull request #9280:
URL: https://github.com/apache/airflow/pull/9280#discussion_r444053678
##########
File path: tests/hooks/test_hive_hook.py
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@@ -390,6 +390,25 @@ def test_table_exists(self):
self.hook.table_exists(str(random.randint(1, 10000)))
)
+ def test_check_hms_clients_load_balance(self):
+ # checks if every time HMS Hook is instantiated, it gets to
+ # different HMS server most of the time and not to the same HMS
server.
+ connection_count = {}
+ hms_hook = HiveMetastoreHook()
+ hms_server_count = len(hms_hook.get_connections('metastore_default'))
+
+ if hms_server_count > 2:
+ for index in range(2 * hms_server_count):
+ conn = HiveMetastoreHook()._find_valid_server().host
+ if conn in connection_count:
+ if connection_count[conn] >= (2 * hms_server_count) - 1:
+ self.assertTrue(1 == 2)
+ else:
+ connection_count[conn] = connection_count[conn] + 1
+ else:
+ connection_count[conn] = 1
+ self.assertTrue(1 == 1)
Review comment:
I appreciate the test, however I'm wondering if it would be sufficient
to mock the `random.shuffle` and assert that it was called? Additionaly we can
mock it with callable that gives deterministic result i.e `lambda xs:
xs[::-1]`, WDYT?
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