feat: implemented proper deserialization for EntityID and IntVector2

src/test/java/uulm/teamname/marvelous/gamelibrary/json/ingame/IntVector2SerializerTest.java

@@ -0,0 +1,37 @@
+package uulm.teamname.marvelous.gamelibrary.json.ingame;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import net.jqwik.api.*;
+import net.jqwik.api.lifecycle.BeforeProperty;
+import uulm.teamname.marvelous.gamelibrary.IntVector2;
+
+import static org.mockito.Mockito.*;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.*;
+
+class IntVector2SerializerTest {
+
+    ObjectMapper mapper = new ObjectMapper();
+
+    @BeforeProperty
+    void setup() {
+        mapper = new ObjectMapper();
+    }
+
+    @Property
+    void vectorsGetProperlyDeserialized(@ForAll @From("positions") IntVector2 vector) throws JsonProcessingException {
+        var jsonRepresentingVector = String.format("[%d,%d]", vector.getX(), vector.getY());
+        assertThat(mapper.writeValueAsString(vector))
+                .isEqualTo(jsonRepresentingVector);
+
+    }
+
+    @Provide("positions")
+    Arbitrary<IntVector2> positions() {
+        return Arbitraries.integers()
+                .tuple2()
+                .map(pos -> new IntVector2(pos.get1(), pos.get2()));
+    }
+
+}