add tests for redis, memcached

tests/unit/clients/memcache_tests.py

@@ -11,7 +11,7 @@
     del pymemcache
 
 from baseplate.lib.config import ConfigurationError
-from baseplate.clients.memcache import pool_from_config
+from baseplate.clients.memcache import pool_from_config, MemcacheContextFactory
 from baseplate.clients.memcache import lib as memcache_lib
 
 
@@ -54,6 +54,16 @@ def test_nodelay(self):
         )
         self.assertEqual(pool.no_delay, False)
 
+    def test_metrics(self):
+        max_pool_size = "123"
+        ctx = MemcacheContextFactory(
+            pool_from_config(
+                {"memcache.endpoint": "localhost:1234", "memcache.max_pool_size": max_pool_size}
+            )
+        )
+        metric = ctx.promTotalConnections.collect()
+        self.assertEqual(metric[0].samples[0].value, float(max_pool_size))
+
 
 class SerdeTests(unittest.TestCase):
     def test_serialize_str(self):

tests/unit/clients/redis_tests.py

@@ -8,7 +8,7 @@
     del redis
 
 from baseplate.lib.config import ConfigurationError
-from baseplate.clients.redis import pool_from_config
+from baseplate.clients.redis import pool_from_config, RedisContextFactory
 
 
 class PoolFromConfigTests(unittest.TestCase):
@@ -23,6 +23,16 @@ def test_basic_url(self):
         self.assertEqual(pool.connection_kwargs["port"], 1234)
         self.assertEqual(pool.connection_kwargs["db"], 0)
 
+    def test_metrics(self):
+        max_connections = "123"
+        ctx = RedisContextFactory(
+            pool_from_config(
+                {"redis.url": "redis://localhost:1234/0", "redis.max_connections": max_connections}
+            )
+        )
+        metric = ctx.totalConnections.collect()
+        self.assertEqual(metric[0].samples[0].value, float(max_connections))
+
     def test_timeouts(self):
         pool = pool_from_config(
             {