From d6dd38a02b6f688bfdfc177dac76581e57a96608 Mon Sep 17 00:00:00 2001
From: etrandafir93 <75391049+etrandafir93@users.noreply.github.com>
Date: Tue, 22 Mar 2022 17:59:07 +0200
Subject: [PATCH] BAEL-5465: tests for subtracting days from date (#11954)

* BAEL-5465: tests for subtracting days from date

* BAEL-5465: upated readme
---
 .../core-java-date-operations-2/README.md     |  1 +
 .../SubtractDaysFromDateUnitTest.java         | 49 +++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/subtractdays/SubtractDaysFromDateUnitTest.java

diff --git a/core-java-modules/core-java-date-operations-2/README.md b/core-java-modules/core-java-date-operations-2/README.md
index 557e4c3517..7c742a4f68 100644
--- a/core-java-modules/core-java-date-operations-2/README.md
+++ b/core-java-modules/core-java-date-operations-2/README.md
@@ -11,4 +11,5 @@ This module contains articles about date operations in Java.
 - [How to determine day of week by passing specific date in Java?](https://www.baeldung.com/java-get-day-of-week)
 - [Finding Leap Years in Java](https://www.baeldung.com/java-leap-year)
 - [Getting the Week Number From Any Date](https://www.baeldung.com/java-get-week-number)
+- [Subtract Days from a Date in Java](https://www.baeldung.com/java-subtract-days-from-a-date)
 - [[<-- Prev]](/core-java-modules/core-java-date-operations-1)
diff --git a/core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/subtractdays/SubtractDaysFromDateUnitTest.java b/core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/subtractdays/SubtractDaysFromDateUnitTest.java
new file mode 100644
index 0000000000..3532712963
--- /dev/null
+++ b/core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/subtractdays/SubtractDaysFromDateUnitTest.java
@@ -0,0 +1,49 @@
+package com.baeldung.subtractdays;
+
+import static org.junit.Assert.assertEquals;
+
+import java.text.SimpleDateFormat;
+import java.time.LocalDate;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+
+import org.joda.time.DateTime;
+import org.junit.Test;
+
+public class SubtractDaysFromDateUnitTest {
+
+    @Test
+    public void givenCalendarDate_whenSubtractingFiveDays_dateIsChangedCorrectly() {
+        Calendar calendar = Calendar.getInstance();
+        calendar.set(2022, Calendar.APRIL, 20);
+
+        calendar.add(Calendar.DATE, -5);
+
+        assertEquals(15, calendar.get(Calendar.DAY_OF_MONTH));
+        assertEquals(Calendar.APRIL, calendar.get(Calendar.MONTH));
+        assertEquals(2022, calendar.get(Calendar.YEAR));
+    }
+
+    @Test
+    public void givenJodaDateTime_whenSubtractingFiveDays_dateIsChangedCorrectly() {
+        DateTime dateTime = new DateTime(2022, 4, 20, 12, 0, 0);
+
+        dateTime = dateTime.minusDays(5);
+
+        assertEquals(15, dateTime.getDayOfMonth());
+        assertEquals(4, dateTime.getMonthOfYear());
+        assertEquals(2022, dateTime.getYear());
+    }
+
+    @Test
+    public void givenLocalDateTime_whenSubtractingFiveDays_dateIsChangedCorrectly() {
+        LocalDate localDateTime = LocalDate.of(2022, 4, 20);
+
+        localDateTime = localDateTime.minusDays(5);
+
+        assertEquals(15, localDateTime.getDayOfMonth());
+        assertEquals(4, localDateTime.getMonthValue());
+        assertEquals(2022, localDateTime.getYear());
+    }
+}