[BAEL-18364] move spring-rest-*** articles - 1

java-numbers/src/test/java/com/baeldung/maths/BigDecimalImplUnitTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.maths;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class BigDecimalImplUnitTest {
+
+    @Test
+    public void givenBigDecimalNumbers_whenAddedTogether_thenGetExpectedResult() {
+        BigDecimal serviceTax = new BigDecimal("56.0084578639");
+        serviceTax = serviceTax.setScale(2, RoundingMode.CEILING);
+
+        BigDecimal entertainmentTax = new BigDecimal("23.00689");
+        entertainmentTax = entertainmentTax.setScale(2, RoundingMode.FLOOR);
+
+        BigDecimal totalTax = serviceTax.add(entertainmentTax);
+        BigDecimal result = BigDecimal.valueOf(79.01);
+
+        Assert.assertEquals(result, totalTax);
+
+    }
+}