From 01d3ce60f92fd5dcb21c9270d26de6fcc61564ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89tienne=20L=C3=A9vesque?= <elevesque@nexapp.ca>
Date: Thu, 6 Mar 2025 08:58:00 -0500
Subject: [PATCH] feat: Add equals and hashCode to Pagination class

---
 src/main/java/ca/nexapp/core/Pagination.java  | 14 ++++++++
 .../java/ca/nexapp/core/PaginationTest.java   | 32 +++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/src/main/java/ca/nexapp/core/Pagination.java b/src/main/java/ca/nexapp/core/Pagination.java
index 5827936..e0ecd90 100644
--- a/src/main/java/ca/nexapp/core/Pagination.java
+++ b/src/main/java/ca/nexapp/core/Pagination.java
@@ -1,5 +1,7 @@
 package ca.nexapp.core;
 
+import java.util.Objects;
+
 public class Pagination {
 
     private final int page;
@@ -37,4 +39,16 @@ public static Pagination offsetted(int offset, int itemPerPage) {
         int page = offset / itemPerPage + 1;
         return new Pagination(page, itemPerPage, offset);
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || getClass() != o.getClass()) return false;
+        Pagination that = (Pagination) o;
+        return page == that.page && itemPerPage == that.itemPerPage && offset == that.offset;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(page, itemPerPage, offset);
+    }
 }
diff --git a/src/test/java/ca/nexapp/core/PaginationTest.java b/src/test/java/ca/nexapp/core/PaginationTest.java
index f938fc2..60db3e2 100644
--- a/src/test/java/ca/nexapp/core/PaginationTest.java
+++ b/src/test/java/ca/nexapp/core/PaginationTest.java
@@ -93,4 +93,36 @@ public void givenAnOffsettedPagination_CanRetrieveASubsetOfACollection() {
 
         assertThat(results).containsExactly(1, 2, 3).inOrder();
     }
+
+    @Test
+    public void givenTwoPaginationsWithDifferentPage_TheyAreNotEqual() {
+        Pagination a = Pagination.paged(1, 10);
+        Pagination b = Pagination.paged(2, 10);
+
+        assertThat(a).isNotEqualTo(b);
+    }
+
+    @Test
+    public void givenTwoPaginationsWithDifferentItemsPerPage_TheyAreNotEqual() {
+        Pagination a = Pagination.paged(1, 10);
+        Pagination b = Pagination.paged(1, 20);
+
+        assertThat(a).isNotEqualTo(b);
+    }
+
+    @Test
+    public void givenTwoPaginationsWithDifferentOffset_TheyAreNotEqual() {
+        Pagination a = Pagination.offsetted(0, 10);
+        Pagination b = Pagination.offsetted(5, 10);
+
+        assertThat(a).isNotEqualTo(b);
+    }
+
+    @Test
+    public void givenTwoPaginationsWithSamePageItemsPerPageAndOffset_TheyAreEqual() {
+        Pagination a = Pagination.offsetted(0, 10);
+        Pagination b = Pagination.offsetted(0, 10);
+
+        assertThat(a).isEqualTo(b);
+    }
 }