| /* |
| * 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 java.util.Arrays; |
| import org.apache.beam.sdk.coders.BigEndianIntegerCoder; |
| import org.apache.beam.sdk.coders.KvCoder; |
| import org.apache.beam.sdk.coders.StringUtf8Coder; |
| 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.junit.Rule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for Keys transform. */ |
| @RunWith(JUnit4.class) |
| public class KeysTest { |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| static final KV<String, Integer>[] TABLE = |
| new KV[] { |
| KV.of("one", 1), KV.of("two", 2), KV.of("three", 3), KV.of("dup", 4), KV.of("dup", 5) |
| }; |
| |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| static final KV<String, Integer>[] EMPTY_TABLE = new KV[] {}; |
| |
| @Rule public final TestPipeline p = TestPipeline.create(); |
| |
| @Test |
| @Category(ValidatesRunner.class) |
| public void testKeys() { |
| PCollection<KV<String, Integer>> input = |
| p.apply( |
| Create.of(Arrays.asList(TABLE)) |
| .withCoder(KvCoder.of(StringUtf8Coder.of(), BigEndianIntegerCoder.of()))); |
| |
| PCollection<String> output = input.apply(Keys.create()); |
| PAssert.that(output).containsInAnyOrder("one", "two", "three", "dup", "dup"); |
| |
| p.run(); |
| } |
| |
| @Test |
| @Category(ValidatesRunner.class) |
| public void testKeysEmpty() { |
| PCollection<KV<String, Integer>> input = |
| p.apply( |
| Create.of(Arrays.asList(EMPTY_TABLE)) |
| .withCoder(KvCoder.of(StringUtf8Coder.of(), BigEndianIntegerCoder.of()))); |
| |
| PCollection<String> output = input.apply(Keys.create()); |
| PAssert.that(output).empty(); |
| p.run(); |
| } |
| } |