OfIterableTest.java

package com.annimon.stream.streamtests;

import com.annimon.stream.Functions;
import com.annimon.stream.Stream;
import java.util.Iterator;
import org.junit.Test;
import static com.annimon.stream.test.hamcrest.StreamMatcher.assertElements;
import static org.hamcrest.Matchers.contains;

public final class OfIterableTest {

    @Test
    public void testStreamOfIterable() {
        Iterable<Integer> iterable = new Iterable<Integer>() {
            @Override
            public Iterator<Integer> iterator() {
                return Functions.counterIterator();
            }
        };

        Stream.of(iterable)
                .limit(5)
                .custom(assertElements(contains(
                      0, 1, 2, 3, 4
                )));
    }

    @Test(expected = NullPointerException.class)
    public void testStreamOfIterableNull() {
        Stream.of((Iterable<?>)null);
    }
}