Add hashcode to pair

chiquitinxx · Dec 7, 2023 · e67f441 · e67f441
1 parent 2c93f10
commit e67f441
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diff --git a/src/main/java/dev/yila/functional/Pair.java b/src/main/java/dev/yila/functional/Pair.java
@@ -44,6 +44,11 @@ public boolean equals(Object obj) {
                 Objects.equals(this.right, ((Pair<?, ?>) obj).right);
     }
 
+    @Override
+    public int hashCode() {
+        return this.left.hashCode() + this.right.hashCode();
+    }
+
     @Override
     public String toString() {
         return "Pair(" + this.left + ", " + this.right + ")";

diff --git a/src/test/java/dev/yila/functional/PairTest.java b/src/test/java/dev/yila/functional/PairTest.java
@@ -41,6 +41,13 @@ void equalPair() {
         assertEquals(hello5, sameHello5);
     }
 
+    @Test
+    void hashcode() {
+        Pair<String, Integer> pair = new Pair<>("hello", 5);
+
+        assertEquals(pair.hashCode(), "hello".hashCode() + Integer.valueOf(5).hashCode());
+    }
+
     @Test
     void pairToString() {
         Pair<String, Integer> hello5 = new Pair<>("hello", 5);