/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy current the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.jclouds.collect;
import static org.easymock.EasyMock.createMock;
import static org.easymock.EasyMock.expect;
import org.easymock.EasyMock;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.google.common.base.Supplier;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableSet;
/**
* Tests behavior of {@code AdvanceUntilEmptyIterable}.
*
* @author Adrian Cole
*/
@Test(testName = "AdvanceUntilEmptyIterableTest")
public class AdvanceUntilEmptyIterableTest {
@SuppressWarnings("unchecked")
@Test
public void testSinglePageResultReturnsSame() {
FluentIterable<String> initial = FluentIterable.from(ImmutableSet.of("foo", "bar"));
Supplier<FluentIterable<String>> nextIterable = createMock(Supplier.class);
expect(nextIterable.get()).andReturn(initial);
EasyMock.replay(nextIterable);
AdvanceUntilEmptyIterable<String> iterable = new AdvanceUntilEmptyIterable<String>(nextIterable);
Assert.assertSame(iterable.get(0), initial);
EasyMock.verify(nextIterable);
}
@SuppressWarnings("unchecked")
@Test
public void testConcatStopsWhenEmpty() {
Supplier<FluentIterable<String>> nextIterable = createMock(Supplier.class);
expect(nextIterable.get()).andReturn(FluentIterable.from(ImmutableSet.of("foo", "bar")));
expect(nextIterable.get()).andReturn(FluentIterable.from(ImmutableSet.of("boo", "baz")));
expect(nextIterable.get()).andReturn(FluentIterable.from(ImmutableSet.of("ham", "cheeze")));
expect(nextIterable.get()).andReturn(FluentIterable.from(ImmutableSet.<String>of()));
EasyMock.replay(nextIterable);
AdvanceUntilEmptyIterable<String> iterable = new AdvanceUntilEmptyIterable<String>(nextIterable);
Assert.assertEquals(iterable.concat().toSet(),
ImmutableSet.of("foo", "bar", "boo", "baz", "ham", "cheeze"));
EasyMock.verify(nextIterable);
}
}