feat: implemented deserializer for IntVector2 and created a test for it

src/main/java/uulm/teamname/marvelous/gamelibrary/IntVector2.java

@@ -1,9 +1,13 @@
 package uulm.teamname.marvelous.gamelibrary;
 
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import uulm.teamname.marvelous.gamelibrary.json.ingame.IntVector2Deserializer;
+
 import java.io.Serializable;
 import java.util.Objects;
 
 /** Represents a 2d vector of integers. */
+@JsonDeserialize(using = IntVector2Deserializer.class)
 public class IntVector2 implements Serializable {
     private int x;
     private int y;

src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/IntVector2Deserializer.java

@@ -0,0 +1,24 @@
+package uulm.teamname.marvelous.gamelibrary.json.ingame;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.ObjectCodec;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import uulm.teamname.marvelous.gamelibrary.IntVector2;
+
+import java.io.IOException;
+
+public class IntVector2Deserializer extends JsonDeserializer<IntVector2> {
+
+    ObjectMapper mapper = new ObjectMapper();
+
+    @Override
+    public IntVector2 deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+        var values = mapper.readValue(p, Integer[].class);
+        IntVector2 result = new IntVector2(values[0], values[1]);
+        return result;
+    }
+}

src/test/java/uulm/teamname/marvelous/gamelibrary/json/ingame/IntVector2DeserializerTest.java

@@ -0,0 +1,53 @@
+package uulm.teamname.marvelous.gamelibrary.json.ingame;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import uulm.teamname.marvelous.gamelibrary.IntVector2;
+
+import java.util.Iterator;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.stream.IntStream;
+
+import static org.mockito.Mockito.*;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.*;
+
+class IntVector2DeserializerTest {
+
+    ObjectMapper mapper;
+
+    @BeforeEach
+    void beforeAll() {
+        mapper = new ObjectMapper();
+    }
+
+
+    @Test
+    void simpleTest() throws JsonProcessingException {
+        IntVector2 target = new IntVector2(4, 17);
+        String jsonDescribingTarget = "[4, 17]";
+        String jsonNotDescribingTarget = "[2, 21]";
+        assertThat(mapper.readValue(jsonDescribingTarget, IntVector2.class))
+                .isEqualTo(target);
+        assertThat(mapper.readValue(jsonNotDescribingTarget, IntVector2.class))
+                .isNotEqualTo(target);
+    }
+
+    @Test
+    void randomTests() throws JsonProcessingException {
+        Iterator<Integer> randomIntegers = ThreadLocalRandom.current().ints().iterator();
+        int repetitions = 50;
+        for (int i = 0; i < repetitions; i++) {
+            int x = randomIntegers.next();
+            int y = randomIntegers.next();
+            IntVector2 target = new IntVector2(x, y);
+            String jsonDescribingTarget = "[" + x + ", " + y + "]";
+            assertThat(mapper.readValue(jsonDescribingTarget, IntVector2.class))
+                    .isEqualTo(target);
+            System.out.println(jsonDescribingTarget);
+        }
+    }
+}