add login method to AccessClient and test

fh.fd.ci.client/src/main/java/de/fd/fh/network/AccessClient.java

@@ -1,6 +1,10 @@
 package de.fd.fh.network;
 
+import de.fd.fh.shared.Utils;
+import de.fd.fh.shared.network.messages.LoginResponse;
 import de.fd.fh.shared.network.messages.RegistrateRequest;
+import feign.Headers;
+import feign.Param;
 import feign.RequestLine;
 import feign.Response;
 
@@ -8,4 +12,8 @@ public interface AccessClient
 {
     @RequestLine("POST /accounts/registrate")
     Response registrate(RegistrateRequest request);
+
+    @RequestLine("POST /accounts/login")
+    @Headers(Utils.AUTHENTICATION_HEADER + ":Basic {authToken}")
+    LoginResponse login(@Param("authToken") final String authenticationHeader);
 }

fh.fd.ci.client/src/test/java/de/fd/fh/network/AccessClientTest.java

@@ -1,7 +1,10 @@
 package de.fd.fh.network;
 
+import de.fd.fh.shared.Utils;
+import de.fd.fh.shared.network.messages.LoginResponse;
 import de.fd.fh.shared.network.messages.RegistrateRequest;
 import feign.Feign;
+import feign.Request;
 import feign.Response;
 import feign.gson.GsonDecoder;
 import feign.gson.GsonEncoder;
@@ -11,7 +14,7 @@ import feign.mock.MockTarget;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
 
 class AccessClientTest
 {
@@ -43,4 +46,31 @@ class AccessClientTest
 
         mockClient.verifyStatus();
     }
+
+    @Test
+    void testLogin()
+    {
+        mockClient
+                .ok(HttpMethod.POST, "/accounts/login",
+                        "{\n" +
+                                "   \"name\":\"testName\",\n" +
+                                "   \"userId\": \"12345\",\n" +
+                                "   \"token\": \"testToken\"\n" +
+                                "}"
+                );
+        final LoginResponse result = client.login("testToken");
+
+        final Request request = mockClient.verifyOne(HttpMethod.POST, "/accounts/login");
+
+        assertNotNull(result);
+        assertEquals("testName", result.getName());
+        assertEquals("12345", result.getUserId());
+        assertEquals("testToken", result.getToken());
+
+        assertTrue(request.headers().get(Utils.AUTHENTICATION_HEADER).stream().findFirst().isPresent(),
+                "Should have auth header");
+        final String authHeader = request.headers().get(Utils.AUTHENTICATION_HEADER).stream().findFirst().get();
+
+        assertEquals("Basic testToken", authHeader, "Should use given token.");
+    }
 }