src/corelibs: Test for beginMulticast.

Signed-off-by: IFX-Anusha <Anusha.TR@infineon.com>

Author: IFX-Anusha

src/corelibs/wifi/test_wifi_udp_client.cpp

@@ -14,6 +14,7 @@
  * - Peek and flush the socket.
  * - Check the senders ip 
  * - Check the senders port
+ * - Sends a packet to a multicast group.
  * - Disconnect from the server and stop the UDP client.
  * 
  *  This test is paired with the "test_wifi_udp_server.cpp" test, which needs to be executed in another 
@@ -131,6 +132,19 @@ TEST_IFX(wifi_udp_client, remote_port)
     TEST_ASSERT_EQUAL(expectedPort, remotePort); 
 }
 
+TEST_IFX(wifi_udp_client, udp_multicast_send){
+    IPAddress multicastIP(239, 0, 0, 1); // Example multicast IP address
+    uint16_t port = 1234;
+   
+    TEST_ASSERT_TRUE(udpClient.beginPacket(multicastIP, port));
+    const char *message = "Hello, Multicast!";
+    size_t bytes_written = udpClient.write(message);
+    TEST_ASSERT_EQUAL_INT(strlen(message), bytes_written); 
+
+    TEST_ASSERT_TRUE(udpClient.endPacket());
+    delay(100); // Wait for the packet to be sent
+}
+
 TEST_IFX(wifi_udp_client, udp_client_end) {
     udpClient.stop(); 
 }
@@ -156,6 +170,7 @@ TEST_GROUP_RUNNER(wifi_udp_client) {
     RUN_TEST_CASE(wifi_udp_client, client_peek_flush);
     RUN_TEST_CASE(wifi_udp_client, remote_ip);
     RUN_TEST_CASE(wifi_udp_client, remote_port);
+    RUN_TEST_CASE(wifi_udp_client, udp_multicast_send);
     RUN_TEST_CASE(wifi_udp_client, udp_client_end);
     RUN_TEST_CASE(wifi_udp_client, wifi_disconnect);
     RUN_TEST_CASE(wifi_udp_client, wifi_end);

src/corelibs/wifi/test_wifi_udp_server.cpp

@@ -9,8 +9,9 @@
  * - Starts processing the next available incoming packet, checks for the presence of a UDP packet
  * - Reads the packet and checks if the data is correct.
  * - Receives multiple packets from different senders and checks if the data and IP are correct.
- * - Handles packet loss by not sending a packet
  * - Writes a packet to the client
+ * - Handles packet loss by not sending a packet
+ * - Joins a multicast group and receives a packet from it
  * - Stops the UDP server
  * - Disconnect from the client and stop the access point.
  * 
@@ -121,6 +122,25 @@ TEST_IFX(wifi_udp_server, handle_packet_loss)
     TEST_ASSERT_EQUAL_INT(0, udpServer.parsePacket()); 
 }
 
+TEST_IFX(wifi_udp_server, joinmulticast_receive)
+{
+    IPAddress multicastIP(239, 0, 0, 1);
+    uint16_t port = 1234;
+
+    udpServer.stop(); // Stop any previous instance
+    TEST_ASSERT_TRUE(udpServer.beginMulticast(multicastIP, port));
+
+    const char* expected_msg = "Hello, Multicast!";
+    char rcvd_msg[50] = {0};
+
+    int packetSize = 0;
+    while ((packetSize = udpServer.parsePacket()) != (int)strlen(expected_msg)) {}
+    TEST_ASSERT_EQUAL_INT(strlen(expected_msg), packetSize);
+    udpServer.read((uint8_t *)rcvd_msg, packetSize);
+    TEST_ASSERT_EQUAL_STRING(expected_msg, rcvd_msg);
+}
+
+
 TEST_IFX(wifi_udp_server, udp_server_end)
 {
     udpServer.stop();
@@ -144,6 +164,7 @@ TEST_GROUP_RUNNER(wifi_udp_server) {
     RUN_TEST_CASE(wifi_udp_server, receive_multiple_packets);
     RUN_TEST_CASE(wifi_udp_server, udp_server_write);
     RUN_TEST_CASE(wifi_udp_server, handle_packet_loss);
+    RUN_TEST_CASE(wifi_udp_server, joinmulticast_receive);
     RUN_TEST_CASE(wifi_udp_server, udp_server_end);
     RUN_TEST_CASE(wifi_udp_server, wifi_disconnect);
     RUN_TEST_CASE(wifi_udp_server, wifi_end);