From d7bb6bc0a77ae8e4645ee5a582d61a560ad42ded Mon Sep 17 00:00:00 2001
From: MohamedHelmyKassab
 <137485958+MohamedHelmyKassab@users.noreply.github.com>
Date: Fri, 1 Dec 2023 02:59:17 +0200
Subject: [PATCH] This commit is related to BAEL-7113 (#15331)
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This commit adds a new test class "RoundNumberToNearestMultipleUnitTest" that suggests multiplе mеthods for rounding up a numbеr to thе nеarеst multiplе of 5 in Java.
---
 .../RoundNumberToNearestMultipleUnitTest.java | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 core-java-modules/core-java-numbers-conversions/src/test/java/com/baeldung/roundnumbertonearestmultiple/RoundNumberToNearestMultipleUnitTest.java

diff --git a/core-java-modules/core-java-numbers-conversions/src/test/java/com/baeldung/roundnumbertonearestmultiple/RoundNumberToNearestMultipleUnitTest.java b/core-java-modules/core-java-numbers-conversions/src/test/java/com/baeldung/roundnumbertonearestmultiple/RoundNumberToNearestMultipleUnitTest.java
new file mode 100644
index 0000000000..24090be343
--- /dev/null
+++ b/core-java-modules/core-java-numbers-conversions/src/test/java/com/baeldung/roundnumbertonearestmultiple/RoundNumberToNearestMultipleUnitTest.java
@@ -0,0 +1,41 @@
+package com.baeldung.roundnumbertonearestmultiple;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class RoundNumberToNearestMultipleUnitTest {
+
+    public static int originalNumber = 18;
+    public static int expectedRoundedNumber = 20;
+    public static int nearest = 5;
+
+    @Test
+    public void givenNumber_whenUsingBasicMathOperations_thenRoundUpToNearestMultipleOf5() {
+
+        int roundedNumber = (originalNumber % nearest == 0) ? originalNumber : ((originalNumber / nearest) + 1) * nearest;
+        assertEquals(expectedRoundedNumber, roundedNumber);
+    }
+
+    @Test
+    public void givenNumber_whenUsingMathCeil_thenRoundUpToNearestMultipleOf5() {
+
+        int roundedNumber = (int) (Math.ceil(originalNumber / (float) (nearest)) * nearest);
+        assertEquals(expectedRoundedNumber, roundedNumber);
+    }
+
+    @Test
+    public void givenNumber_whenUsingMathRound_thenRoundUpToNearestMultipleOf5() {
+
+        int roundedNumber = Math.round(originalNumber / (float) (nearest)) * nearest;
+        assertEquals(expectedRoundedNumber, roundedNumber);
+    }
+
+    @Test
+    public void givenNumber_whenUsingMathFloor_thenRoundUpToNearestMultipleOf5() {
+
+        int roundedNumber = (int) (Math.floor((double) (originalNumber + nearest / 2) / nearest) * nearest);
+        assertEquals(expectedRoundedNumber, roundedNumber);
+    }
+
+}