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 list; MutableList 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 notGreaterThanThirty = list.reject(Predicates.greaterThan(30)).sortThis(); Assertions.assertThat(notGreaterThanThirty).containsExactlyElementsOf(this.expectedList); } }