/*
* 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.contains;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertThat;
import java.util.Collections;
import org.apache.beam.sdk.coders.Coder.Context;
import org.apache.beam.sdk.coders.Coder.NonDeterministicException;
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;
/** Tests for constructs defined within {@link Coder}. */
@RunWith(JUnit4.class)
public class CoderTest {
@Rule public ExpectedException expectedException = ExpectedException.none();
@Test
public void testContextEqualsAndHashCode() {
assertEquals(Context.NESTED, new Context(false));
assertEquals(Context.OUTER, new Context(true));
assertNotEquals(Context.NESTED, Context.OUTER);
assertEquals(Context.NESTED.hashCode(), new Context(false).hashCode());
assertEquals(Context.OUTER.hashCode(), new Context(true).hashCode());
// Even though this isn't strictly required by the hashCode contract,
// we still want this to be true.
assertNotEquals(Context.NESTED.hashCode(), Context.OUTER.hashCode());
}
@Test
public void testContextToString() {
assertEquals("Context{NESTED}", Context.NESTED.toString());
assertEquals("Context{OUTER}", Context.OUTER.toString());
}
@Test
public void testNonDeterministicExcpetionRequiresReason() {
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("Reasons must not be empty");
new NonDeterministicException(VoidCoder.of(), Collections.<String>emptyList());
}
@Test
public void testNonDeterministicException() {
NonDeterministicException rootCause =
new NonDeterministicException(VoidCoder.of(), "Root Cause");
NonDeterministicException exception =
new NonDeterministicException(StringUtf8Coder.of(), "Problem", rootCause);
assertEquals(rootCause, exception.getCause());
assertThat(exception.getReasons(), contains("Problem"));
assertThat(exception.toString(), containsString("Problem"));
assertThat(exception.toString(), containsString("is not deterministic"));
}
@Test
public void testTypeIsPreserved() throws Exception {
assertThat(VoidCoder.of().getEncodedTypeDescriptor(),
equalTo(TypeDescriptor.of(Void.class)));
}
}