Merge pull request #8153 from vatsalgosar/BAEL-3401

[BAEL-3401]- Skipping Weekends While Adding Days

core-java-modules/core-java-date-operations/src/main/java/com/baeldung/datetime/AddSubtractDaysSkippingWeekendsUtils.java

@@ -0,0 +1,31 @@
+package com.baeldung.datetime;
+
+import java.time.DayOfWeek;
+import java.time.LocalDate;
+
+public class AddSubtractDaysSkippingWeekendsUtils {
+
+    public static LocalDate addDaysSkippingWeekends(LocalDate date, int days) {
+        LocalDate result = date;
+        int addedDays = 0;
+        while (addedDays < days) {
+            result = result.plusDays(1);
+            if (!(result.getDayOfWeek() == DayOfWeek.SATURDAY || result.getDayOfWeek() == DayOfWeek.SUNDAY)) {
+                ++addedDays;
+            }
+        }
+        return result;
+    }
+
+    public static LocalDate subtractDaysSkippingWeekends(LocalDate date, int days) {
+        LocalDate result = date;
+        int subtractedDays = 0;
+        while (subtractedDays < days) {
+            result = result.minusDays(1);
+            if (!(result.getDayOfWeek() == DayOfWeek.SATURDAY || result.getDayOfWeek() == DayOfWeek.SUNDAY)) {
+                ++subtractedDays;
+            }
+        }
+        return result;
+    }
+}

core-java-modules/core-java-date-operations/src/test/java/com/baeldung/datetime/AddSubtractDaysSkippingWeekendsUtilsUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.datetime;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import java.time.LocalDate;
+
+public class AddSubtractDaysSkippingWeekendsUtilsUnitTest {
+
+    @Test
+    public void givenLocalDateAndDaysToAdd_thenAddDaysSkippingWeekends() {
+        LocalDate initialDate = LocalDate.of(2019, 11, 7);
+        LocalDate expectedDate = LocalDate.of(2019, 11, 13);
+        LocalDate result = AddSubtractDaysSkippingWeekendsUtils.addDaysSkippingWeekends(initialDate, 4);
+        assertEquals(expectedDate, result);
+    }
+
+    @Test
+    public void givenLocalDateAndDaysToSubtract_thenSubtractDaysSkippingWeekends() {
+        LocalDate initialDate = LocalDate.of(2019, 11, 7);
+        LocalDate expectedDate = LocalDate.of(2019, 11, 1);
+        LocalDate result = AddSubtractDaysSkippingWeekendsUtils.subtractDaysSkippingWeekends(initialDate, 4);
+        assertEquals(expectedDate, result);
+    }
+
+}