/*
* 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.transforms;
import org.apache.beam.sdk.testing.PAssert;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.testing.ValidatesRunner;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TypeDescriptor;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Java 8 Tests for {@link WithKeys}.
*/
@RunWith(JUnit4.class)
public class WithKeysJava8Test {
@Rule
public final transient TestPipeline p = TestPipeline.create();
@Rule
public ExpectedException thrown = ExpectedException.none();
@Test
@Category(ValidatesRunner.class)
public void withLambdaAndTypeDescriptorShouldSucceed() {
PCollection<String> values = p.apply(Create.of("1234", "3210", "0", "-12"));
PCollection<KV<Integer, String>> kvs = values.apply(
WithKeys.of((String s) -> Integer.valueOf(s))
.withKeyType(TypeDescriptor.of(Integer.class)));
PAssert.that(kvs).containsInAnyOrder(
KV.of(1234, "1234"), KV.of(0, "0"), KV.of(-12, "-12"), KV.of(3210, "3210"));
p.run();
}
@Test
public void withLambdaAndNoTypeDescriptorShouldThrow() {
PCollection<String> values = p.apply(Create.of("1234", "3210", "0", "-12"));
values.apply("ApplyKeysWithWithKeys", WithKeys.of((String s) -> Integer.valueOf(s)));
thrown.expect(IllegalStateException.class);
thrown.expectMessage("Unable to return a default Coder for ApplyKeysWithWithKeys");
p.run();
}
}