Diff: mbed-os/TESTS/netsocket/dns/synchronous_dns_cache.cpp

Revision:

0:8fdf9a60065b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/TESTS/netsocket/dns/synchronous_dns_cache.cpp	Wed Oct 10 00:33:53 2018 +0000
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2018, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "dns_tests.h"
+
+using namespace utest::v1;
+
+namespace {
+int ticker_us = 0;
+}
+
+static void test_dns_query_ticker(void)
+{
+    ticker_us += 100;
+}
+
+void SYNCHRONOUS_DNS_CACHE()
+{
+    rtos::Semaphore semaphore;
+
+    Ticker ticker;
+    ticker.attach_us(&test_dns_query_ticker, 100);
+
+    for (unsigned int i = 0; i < 5; i++) {
+        SocketAddress address;
+        int started_us = ticker_us;
+        nsapi_error_t err = get_interface()->gethostbyname(dns_test_hosts_second[0], &address);
+
+        int delay_ms = (ticker_us - started_us) / 1000;
+
+        static int delay_first = delay_ms / 2;
+        // Check that cached accesses are at least twice as fast as the first one
+        TEST_ASSERT_TRUE(i == 0 || delay_ms <= delay_first);
+
+        printf("DNS: query \"%s\" => \"%s\", time %i ms\n",
+               dns_test_hosts_second[0], address.get_ip_address(), delay_ms);
+    }
+}