/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 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 org.apache.beam.sdk.coders;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.TypeDescriptor;
import org.apache.beam.sdk.values.TypeDescriptors;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link CoderProviders}.
*/
@RunWith(JUnit4.class)
public class CoderProvidersTest {
@Test
public void testCoderProvidersFromStaticMethodsForParameterlessTypes() throws Exception {
CoderProvider factory = CoderProviders.fromStaticMethods(String.class, StringUtf8Coder.class);
assertEquals(StringUtf8Coder.of(),
factory.coderFor(TypeDescriptors.strings(), Collections.<Coder<?>>emptyList()));
factory = CoderProviders.fromStaticMethods(Double.class, DoubleCoder.class);
assertEquals(DoubleCoder.of(),
factory.coderFor(TypeDescriptors.doubles(), Collections.<Coder<?>>emptyList()));
factory = CoderProviders.fromStaticMethods(byte[].class, ByteArrayCoder.class);
assertEquals(ByteArrayCoder.of(),
factory.coderFor(TypeDescriptor.of(byte[].class), Collections.<Coder<?>>emptyList()));
}
/**
* Checks that {#link CoderProviders.fromStaticMethods} successfully
* builds a working {@link CoderProvider} from {@link KvCoder KvCoder.class}.
*/
@Test
public void testKvCoderProvider() throws Exception {
TypeDescriptor<KV<Double, Double>> type =
TypeDescriptors.kvs(TypeDescriptors.doubles(), TypeDescriptors.doubles());
CoderProvider kvCoderProvider = CoderProviders.fromStaticMethods(KV.class, KvCoder.class);
assertEquals(
KvCoder.of(DoubleCoder.of(), DoubleCoder.of()),
kvCoderProvider.coderFor(type, Arrays.asList(DoubleCoder.of(), DoubleCoder.of())));
}
/**
* Checks that {#link CoderProviders.fromStaticMethods} successfully
* builds a working {@link CoderProvider} from {@link ListCoder ListCoder.class}.
*/
@Test
public void testListCoderProvider() throws Exception {
TypeDescriptor<List<Double>> type = TypeDescriptors.lists(TypeDescriptors.doubles());
CoderProvider listCoderProvider = CoderProviders.fromStaticMethods(List.class, ListCoder.class);
assertEquals(
ListCoder.of(DoubleCoder.of()),
listCoderProvider.coderFor(type, Arrays.asList(DoubleCoder.of())));
}
/**
* Checks that {#link CoderProviders.fromStaticMethods} successfully
* builds a working {@link CoderProvider} from {@link IterableCoder IterableCoder.class}.
*/
@Test
public void testIterableCoderProvider() throws Exception {
TypeDescriptor<Iterable<Double>> type = TypeDescriptors.iterables(TypeDescriptors.doubles());
CoderProvider iterableCoderProvider =
CoderProviders.fromStaticMethods(Iterable.class, IterableCoder.class);
assertEquals(
IterableCoder.of(DoubleCoder.of()),
iterableCoderProvider.coderFor(type, Arrays.asList(DoubleCoder.of())));
}
}