BAEL-1035 Introduction to Eclipse Collections

2017-08-09 06:42:13 +02:00
parent af4a8eb101
commit 207f88b597
13 changed files with 338 additions and 0 deletions
@@ -0,0 +1,54 @@
+package com.baeldung.eclipsecollections;
+
+import org.eclipse.collections.api.list.MutableList;
+import org.eclipse.collections.impl.block.factory.Predicates;
+import org.eclipse.collections.impl.list.mutable.FastList;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class SelectPatternTest {
+
+    @Test
+    public void whenSelect_thenCorrect() {
+        MutableList<Integer> list = new FastList<>();
+        list.add(1);
+        list.add(8);
+        list.add(5);
+        list.add(41);
+        list.add(31);
+        list.add(17);
+        list.add(23);
+        list.add(38);
+
+        MutableList<Integer> greaterThanThirty = list.select(Predicates.greaterThan(30))
+            .sortThis();
+
+        Assert.assertEquals(31, (int) greaterThanThirty.getFirst());
+        Assert.assertEquals(38, (int) greaterThanThirty.get(1));
+        Assert.assertEquals(41, (int) greaterThanThirty.getLast());
+    }
+
+    public MutableList selectUsingLambda() {
+        MutableList<Integer> list = new FastList<>();
+        list.add(1);
+        list.add(8);
+        list.add(5);
+        list.add(41);
+        list.add(31);
+        list.add(17);
+        list.add(23);
+        list.add(38);
+
+        return list.select(each -> each > 30)
+            .sortThis();
+    }
+
+    @Test
+    public void whenSelectUsingLambda_thenCorrect() {
+        MutableList<Integer> greaterThanThirty = selectUsingLambda();
+
+        Assert.assertEquals(31, (int) greaterThanThirty.getFirst());
+        Assert.assertEquals(38, (int) greaterThanThirty.get(1));
+        Assert.assertEquals(41, (int) greaterThanThirty.getLast());
+    }
+}