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65 lines (55 loc) · 1.81 KB
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/*
* Copyright 2011-2016 David Karnok
*
* Licensed 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 of 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 ix;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class ReduceTest {
@Test
public void normal() {
Ix<Integer> source = Ix.range(1, 10).reduce(new IxSupplier<Integer>() {
@Override
public Integer get() {
return 0;
}
}, new IxFunction2<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer a, Integer b) {
return a + b;
}
});
assertEquals(55, source.first().intValue());
}
@Test
public void aggregate() {
Ix<Integer> source = Ix.range(1, 10).reduce(new IxFunction2<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer a, Integer b) {
return a + b;
}
});
assertEquals(55, source.first().intValue());
}
@Test
public void aggregateEmpty() {
Ix<Integer> source = Ix.<Integer>empty().reduce(new IxFunction2<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer a, Integer b) {
return a + b;
}
});
IxTestHelper.assertValues(source);
}
}