test: completed test for Client

Server/src/test/java/uulm/teamname/marvelous/server/netconnector/ClientTest.java

@@ -0,0 +1,53 @@
+package uulm.teamname.marvelous.server.netconnector;
+
+import org.java_websocket.WebSocket;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import uulm.teamname.marvelous.gamelibrary.json.JSON;
+import uulm.teamname.marvelous.gamelibrary.messages.ErrorMessage;
+
+import static org.mockito.Mockito.*;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.*;
+
+class ClientTest {
+
+    Client client;
+    WebSocket socket;
+    SUID suid;
+
+    @BeforeEach
+    void setUp() {
+        socket = mock(WebSocket.class);
+        suid = new SUID("ClientName", "DeviceID");
+
+        client = new Client(socket);
+    }
+
+    @Test
+    void clientGetsCreatedEmpty() {
+        assertThat(client.getState()).isEqualTo(ClientState.Blank);
+        assertThat(client.getId()).isNull();
+        assertThat(client.getSocket()).isEqualTo(socket);
+    }
+
+    @Test
+    void sendError() {
+        client.sendError("SomeMessage");
+
+        verify(socket).send("{\"messageType\":\"ERROR\",\"message\":\"SomeMessage\",\"type\":0}");
+    }
+
+    @Test
+    void sendMessage() {
+        var stringRepresentingErrorMessage = "{\"messageType\":\"ERROR\",\"message\":\"SomeMessage\",\"type\":0}";
+
+        var errorMessage = new ErrorMessage();
+        errorMessage.message = "SomeMessage";
+        errorMessage.type = 0;
+
+        client.sendMessage(errorMessage);
+
+        verify(socket).send(stringRepresentingErrorMessage);
+    }
+}