Add test for enumerations

Author: mperor

FirstSteps/src/test/java/pl/mperor/lab/java/lang/element/EnumTest.java

@@ -0,0 +1,55 @@
+package pl.mperor.lab.java.lang.element;
+
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+public class EnumTest {
+
+    @Test
+    public void testEnumeration() {
+        Assertions.assertEquals(0, Season.SPRING.ordinal());
+        var hottestSeasons = Season.SUMMER;
+        Assertions.assertTrue(hottestSeasons == Season.SUMMER);
+        Assertions.assertEquals("FALL", Season.FALL.name());
+        Assertions.assertEquals(Season.WINTER, Season.valueOf("WINTER"));
+        Assertions.assertArrayEquals(new Month[]{Month.DECEMBER, Month.JANUARY, Month.FEBRUARY},
+                Season.WINTER.getMonths());
+        Assertions.assertEquals(4, Season.values().length);
+    }
+
+    enum Season {
+        SPRING(Month.MARCH, Month.APRIL, Month.MAY),
+        SUMMER(Month.JUNE, Month.JULY, Month.AUGUST),
+        FALL(Month.SEPTEMBER, Month.OCTOBER, Month.NOVEMBER),
+        WINTER(Month.DECEMBER, Month.JANUARY, Month.FEBRUARY);
+
+        private final Month[] months;
+
+        Season(Month... months) {
+            this.months = months;
+        }
+
+        Month[] getMonths() {
+            return Arrays.copyOf(months, months.length);
+        }
+    }
+
+    enum Month {
+        JANUARY,
+        FEBRUARY,
+        MARCH,
+        APRIL,
+        MAY,
+        JUNE,
+        JULY,
+        AUGUST,
+        SEPTEMBER,
+        OCTOBER,
+        NOVEMBER,
+        DECEMBER
+    }
+
+}