feat: implemented proper deserialization for EntityID and IntVector2

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

@@ -1,13 +1,16 @@
 package uulm.teamname.marvelous.gamelibrary;
 
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import uulm.teamname.marvelous.gamelibrary.json.ingame.IntVector2Deserializer;
+import uulm.teamname.marvelous.gamelibrary.json.ingame.IntVector2Serializer;
 
 import java.io.Serializable;
 import java.util.Objects;
 
 /** Represents a 2d vector of integers. */
 @JsonDeserialize(using = IntVector2Deserializer.class)
+@JsonSerialize(using = IntVector2Serializer.class)
 public class IntVector2 implements Serializable {
     private int x;
     private int y;

src/main/java/uulm/teamname/marvelous/gamelibrary/entities/EntityID.java

@@ -1,15 +1,18 @@
 package uulm.teamname.marvelous.gamelibrary.entities;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import uulm.teamname.marvelous.gamelibrary.json.ingame.EntityIDDeserializer;
 
 import java.util.Objects;
 
 /** Represents a distinct identification for every {@link Entity} in a game. */
+@JsonPropertyOrder({"entityID", "ID"})
 @JsonDeserialize(using = EntityIDDeserializer.class)
 public class EntityID {
     /** The index of the entity */
+    @JsonProperty("ID")
     public final int id;
 
     /** The type of the entity */

src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/IntVector2Serializer.java

@@ -0,0 +1,27 @@
+package uulm.teamname.marvelous.gamelibrary.json.ingame;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+import uulm.teamname.marvelous.gamelibrary.IntVector2;
+
+import java.io.IOException;
+
+public class IntVector2Serializer extends StdSerializer<IntVector2> {
+
+    public IntVector2Serializer() {
+        this(null);
+    }
+
+    protected IntVector2Serializer(Class<IntVector2> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(IntVector2 value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+        gen.writeStartArray();
+        gen.writeNumber(value.getX());
+        gen.writeNumber(value.getY());
+        gen.writeEndArray();
+    }
+}

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()));
+    }
+
+}