Instanced Utils (#632)

* Instanced Utils

* Use default equals and toString

1 files changed, 93 insertions, 0 deletions

diff --git a/src/test/java/de/hysky/skyblocker/utils/InstancedUtilsTest.java b/src/test/java/de/hysky/skyblocker/utils/InstancedUtilsTest.java
new file mode 100644
index 00000000..e5dbbff6
--- /dev/null
+++ b/src/test/java/de/hysky/skyblocker/utils/InstancedUtilsTest.java
@@ -0,0 +1,93 @@
+package de.hysky.skyblocker.utils;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class InstancedUtilsTest {
+
+	@Test
+	void testSameInstanceEqual() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		
+		Assertions.assertEquals(vec1, vec1);
+	}
+	
+	@Test
+	void testSameFieldValuesEqual() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		Vector3i vec2 = new Vector3i(8, 8, 8);
+		
+		Assertions.assertEquals(vec1, vec2);
+	}
+	
+	@Test
+	void testDifferentFieldValuesEqual() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		Vector3i vec2 = new Vector3i(-8, -8, -8);
+		
+		Assertions.assertNotEquals(vec1, vec2);
+	}
+	
+	@Test
+	void testHashCodeOfEqualFieldValues() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		Vector3i vec2 = new Vector3i(8, 8, 8);
+		
+		Assertions.assertEquals(vec1.hashCode(), vec2.hashCode());
+	}
+	
+	@Test
+	void testHashCodeOfDifferentFieldValues() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		Vector3i vec2 = new Vector3i(-8, -8, -8);
+		
+		Assertions.assertNotEquals(vec1.hashCode(), vec2.hashCode());
+	}
+	
+	@Test
+	void testToString() {
+		Vector3i vec1 = new Vector3i(8, 8, 8);
+		
+		Assertions.assertEquals(vec1.toString(), "Vector3i[x=8, y=8, z=8]");
+	}
+	
+	@SuppressWarnings("unused")
+	private static class Vector3i {
+		final int x;
+		final int y;
+		final int z;
+		
+		Vector3i(int x, int y, int z) {
+			this.x = x;
+			this.y = y;
+			this.z = z;
+		}
+		
+		@Override
+		public boolean equals(Object o) {
+			try {
+				return (boolean) InstancedUtils.equals(getClass()).invokeExact(this, o);
+			} catch (Throwable ignored) {
+				return super.equals(o);
+			}
+		}
+		
+		@Override
+		public int hashCode() {
+			try {
+				return (int) InstancedUtils.hashCode(getClass()).invokeExact(this);
+			} catch (Throwable ignored) {
+				return System.identityHashCode(this);
+			}
+		}
+		
+		@Override
+		public String toString() {
+			try {
+				return (String) InstancedUtils.toString(getClass()).invokeExact(this);
+			} catch (Throwable ignored) {
+				return super.toString();
+			}
+		}
+	}
+}