JAVA-1470 Move 10 articles to libraries-4 module

libraries-4/src/test/java/com/baeldung/eclipsecollections/RejectPatternUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.eclipsecollections;
+
+import org.assertj.core.api.Assertions;
+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.Before;
+import org.junit.Test;
+
+public class RejectPatternUnitTest {
+
+    MutableList<Integer> list;
+    MutableList<Integer> expectedList;
+
+    @Before
+    public void setup() {
+        this.list = FastList.newListWith(1, 8, 5, 41, 31, 17, 23, 38);
+        this.expectedList = FastList.newListWith(1, 5, 8, 17, 23);
+    }
+
+    @Test
+    public void whenReject_thenCorrect() {
+        MutableList<Integer> notGreaterThanThirty = list.reject(Predicates.greaterThan(30)).sortThis();
+
+        Assertions.assertThat(notGreaterThanThirty).containsExactlyElementsOf(this.expectedList);
+    }
+}