Adds TCP test case

	tcpsocket_send_repeat

Author: Veijo Pesonen

TESTS/netsocket/tcp/main.cpp

@@ -101,6 +101,7 @@ Case cases[] = {
     Case("Receive 100k from CHARGEN service", test_tcpsocket_recv_100k),
     Case("Receive 100k from CHARGEN service non-block", test_tcpsocket_recv_100k_nonblock),
     Case("Receive in given time", test_tcpsocket_recv_timeout),
+    Case("Send repeatedly", test_tcpsocket_send_repeat),
     Case("Sending shall not take too long", test_tcpsocket_send_timeout),
     Case("Parallel socket thread safety", test_tcpsocket_thread_per_socket_safety),
     Case("Endpoint initiated close", test_tcpsocket_endpoint_close),

TESTS/netsocket/tcp/tcp_tests.h

@@ -36,6 +36,7 @@ void test_tcpsocket_open_limit();
 void test_tcpsocket_recv_100k();
 void test_tcpsocket_recv_100k_nonblock();
 void test_tcpsocket_recv_timeout();
+void test_tcpsocket_send_repeat();
 void test_tcpsocket_send_timeout();
 void test_tcpsocket_thread_per_socket_safety();
 

TESTS/netsocket/tcp/tcpsocket_send_repeat.cpp

@@ -0,0 +1,42 @@
+/*
+ * 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 MBED_CONF_APP_HEADER_FILE
+#include "TCPSocket.h"
+#include "greentea-client/test_env.h"
+#include "unity/unity.h"
+#include "utest.h"
+#include "tcp_tests.h"
+
+using namespace utest::v1;
+
+void test_tcpsocket_send_repeat()
+{
+    TCPSocket sock;
+    sock.open(get_interface());
+    sock.connect(MBED_CONF_APP_ECHO_SERVER_ADDR, 9);
+
+    int err;
+    Timer timer;
+    static const char tx_buffer[] = {'h','e','l','l','o'};
+    for (int i = 0; i < 1000; i++) {
+        err = sock.send(tx_buffer, sizeof(tx_buffer));
+        TEST_ASSERT_EQUAL(sizeof(tx_buffer), err);
+    }
+    sock.close();
+}