Simple test to proof equals works for similar collection types.

collectionEqualsTest.java

import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

public class CollectionsTest {

	@Test
	public void testListEquals() throws Exception {
		List<Integer> arrayList = Stream.of(1, 2, 3, 4, 5).collect(Collectors.toCollection(ArrayList::new));
		List<Integer> linkedList = Stream.of(1, 2, 3, 4, 5).collect(Collectors.toCollection(LinkedList::new));

		assertThat(arrayList, is(equalTo(arrayList)));
		assertThat(linkedList, is(equalTo(linkedList)));
		assertThat(arrayList, is(equalTo(linkedList)));
		assertThat(linkedList, is(equalTo(arrayList)));
		assertThat(arrayList, is(equalTo(ImmutableList.of(1, 2, 3, 4, 5))));
	}

	@Test
	public void testSetEquals() throws Exception {
		Set<Integer> hashSet = Stream.of(1, 2, 3, 4, 5).collect(Collectors.toCollection(HashSet::new));
		Set<Integer> treeSet = Stream.of(1, 2, 3, 4, 5).collect(Collectors.toCollection(TreeSet::new));

		assertThat(hashSet, is(equalTo(hashSet)));
		assertThat(treeSet, is(equalTo(treeSet)));
		assertThat(hashSet, is(equalTo(treeSet)));
		assertThat(treeSet, is(equalTo(hashSet)));
		assertThat(treeSet, is(equalTo(ImmutableSet.of(1, 2, 3, 4, 5))));
	}
}