/*
* 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.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.TreeSet;
import org.apache.beam.sdk.testing.CoderProperties;
import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
import org.apache.beam.sdk.util.CoderUtils;
import org.apache.beam.sdk.values.TypeDescriptor;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Test case for {@link CollectionCoder}.
*/
@RunWith(JUnit4.class)
public class CollectionCoderTest {
private static final Coder<Collection<Integer>> TEST_CODER = CollectionCoder.of(VarIntCoder.of());
private static final List<Collection<Integer>> TEST_VALUES = Arrays.<Collection<Integer>>asList(
Collections.<Integer>emptyList(),
Collections.<Integer>emptySet(),
Collections.singletonList(13),
Arrays.asList(1, 2, 3, 4),
new LinkedList<>(Arrays.asList(7, 6, 5)),
new TreeSet<>(Arrays.asList(31, -5, 83)));
@Test
public void testDecodeEncodeContentsEqual() throws Exception {
for (Collection<Integer> value : TEST_VALUES) {
CoderProperties.coderDecodeEncodeContentsEqual(TEST_CODER, value);
}
}
/**
* Generated data to check that the wire format has not changed. To regenerate, see
* {@link org.apache.beam.sdk.coders.PrintBase64Encodings}.
*/
private static final List<String> TEST_ENCODINGS = Arrays.asList(
"AAAAAA",
"AAAAAA",
"AAAAAQ0",
"AAAABAECAwQ",
"AAAAAwcGBQ",
"AAAAA_v___8PH1M");
@Test
public void testWireFormat() throws Exception {
CoderProperties.coderDecodesBase64ContentsEqual(TEST_CODER, TEST_ENCODINGS, TEST_VALUES);
}
@Rule
public ExpectedException thrown = ExpectedException.none();
@Test
public void encodeNullThrowsCoderException() throws Exception {
thrown.expect(CoderException.class);
thrown.expectMessage("cannot encode a null Collection");
CoderUtils.encodeToBase64(TEST_CODER, null);
}
@Test
public void testCoderIsSerializableWithWellKnownCoderType() throws Exception {
CoderProperties.coderSerializable(CollectionCoder.of(GlobalWindow.Coder.INSTANCE));
}
public void testEncodedTypeDescriptor() throws Exception {
TypeDescriptor<Collection<Integer>> expectedTypeDescriptor =
new TypeDescriptor<Collection<Integer>>() {};
assertThat(TEST_CODER.getEncodedTypeDescriptor(), equalTo(expectedTypeDescriptor));
}
}