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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// Licensed 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 com.google.devtools.build.lib.skyframe.serialization;
import static com.google.common.truth.Truth.assertThat;
import static com.google.devtools.build.lib.testutil.MoreAsserts.assertThrows;
import com.google.devtools.build.lib.skyframe.serialization.ObjectCodecRegistry.CodecDescriptor;
import com.google.devtools.build.lib.skyframe.serialization.SerializationException.NoCodecException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link ObjectCodecRegistry}. */
@RunWith(JUnit4.class)
public class ObjectCodecRegistryTest {
@Test
public void testDescriptorLookups() throws NoCodecException {
SingletonCodec<String> codec1 = SingletonCodec.of("value1", "mnemonic1");
SingletonCodec<Integer> codec2 = SingletonCodec.of(1, "mnemonic2");
ObjectCodecRegistry underTest =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(false)
.add(codec1)
.add(codec2)
.build();
CodecDescriptor fooDescriptor = underTest.getCodecDescriptorForObject("hello");
assertThat(fooDescriptor.getCodec()).isSameAs(codec1);
assertThat(underTest.getCodecDescriptorByTag(fooDescriptor.getTag())).isSameAs(fooDescriptor);
CodecDescriptor barDescriptor = underTest.getCodecDescriptorForObject(1);
assertThat(barDescriptor.getCodec()).isSameAs(codec2);
assertThat(underTest.getCodecDescriptorByTag(barDescriptor.getTag())).isSameAs(barDescriptor);
assertThat(barDescriptor.getTag()).isNotEqualTo(fooDescriptor.getTag());
assertThrows(NoCodecException.class, () -> underTest.getCodecDescriptorForObject((byte) 1));
assertThrows(NoCodecException.class, () -> underTest.getCodecDescriptorByTag(42));
}
@Test
public void testDefaultCodecFallback() throws NoCodecException {
SingletonCodec<String> codec = SingletonCodec.of("value1", "mnemonic1");
ObjectCodecRegistry underTest =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(true)
.add(codec)
.addClassName(Byte.class.getName())
.addClassName(Integer.class.getName())
.build();
CodecDescriptor fooDescriptor = underTest.getCodecDescriptorForObject("value1");
assertThat(fooDescriptor.getCodec()).isSameAs(codec);
CodecDescriptor barDefaultDescriptor = underTest.getCodecDescriptorForObject(15);
assertThat(barDefaultDescriptor.getCodec()).isNotSameAs(codec);
assertThat(barDefaultDescriptor.getTag()).isNotEqualTo(fooDescriptor.getTag());
assertThat(underTest.getCodecDescriptorByTag(barDefaultDescriptor.getTag()))
.isSameAs(barDefaultDescriptor);
assertThat(underTest.getCodecDescriptorForObject((byte) 9).getCodec().getClass())
.isSameAs(barDefaultDescriptor.getCodec().getClass());
// Bogus tags still throw.
assertThrows(NoCodecException.class, () -> underTest.getCodecDescriptorByTag(42));
}
@Test
public void testStableTagOrdering() throws NoCodecException {
SingletonCodec<String> codec1 = SingletonCodec.of("value1", "mnemonic1");
SingletonCodec<Integer> codec2 = SingletonCodec.of(1, "mnemonic2");
ObjectCodecRegistry underTest1 =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(true)
.add(codec1)
.add(codec2)
.addClassName(Byte.class.getName())
.build();
ObjectCodecRegistry underTest2 =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(true)
.add(codec2)
.add(codec1)
.addClassName(Byte.class.getName())
.build();
assertThat(underTest1.getCodecDescriptorForObject("value1").getTag())
.isEqualTo(underTest2.getCodecDescriptorForObject("value1").getTag());
assertThat(underTest1.getCodecDescriptorForObject(5).getTag())
.isEqualTo(underTest2.getCodecDescriptorForObject(5).getTag());
// Default codec.
assertThat(underTest1.getCodecDescriptorForObject((byte) 10).getTag())
.isEqualTo(underTest2.getCodecDescriptorForObject((byte) 10).getTag());
}
@Test
public void constantsOrderedByLastOccurrenceInIteration() {
Object constant1 = new Object();
Object constant2 = new Object();
ObjectCodecRegistry underTest1 =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(false)
.addConstant(constant1)
.addConstant(constant2)
.addConstant(constant1)
.build();
ObjectCodecRegistry underTest2 =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(false)
.addConstant(constant1)
.addConstant(constant2)
.build();
assertThat(underTest1.maybeGetTagForConstant(constant1)).isEqualTo(3);
assertThat(underTest1.maybeGetTagForConstant(constant2)).isEqualTo(2);
assertThat(underTest2.maybeGetTagForConstant(constant1)).isEqualTo(1);
assertThat(underTest2.maybeGetTagForConstant(constant2)).isEqualTo(2);
}
@Test
public void testGetBuilder() throws NoCodecException {
SingletonCodec<String> codec1 = SingletonCodec.of("value1", "mnemonic1");
SingletonCodec<Integer> codec2 = SingletonCodec.of(1, "mnemonic2");
Object constant = new Object();
ObjectCodecRegistry underTest =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(false)
.add(codec1)
.add(codec2)
.addConstant(constant)
.build();
ObjectCodecRegistry copy = underTest.getBuilder().build();
assertThat(copy.getCodecDescriptorForObject(12).getTag()).isEqualTo(1);
assertThat(copy.getCodecDescriptorForObject("value1").getTag()).isEqualTo(2);
assertThat(copy.maybeGetTagForConstant(constant)).isNotNull();
assertThrows(NoCodecException.class, () -> copy.getCodecDescriptorForObject((byte) 5));
}
private enum TestEnum {
ONE {
@Override
public int val() {
return 1;
}
},
TWO {
@Override
public int val() {
return 2;
}
},
THREE {
@Override
public int val() {
return 3;
}
};
public abstract int val();
}
@SuppressWarnings("GetClassOnEnum")
@Test
public void testDefaultEnum() throws NoCodecException {
assertThat(TestEnum.ONE.getClass()).isNotEqualTo(TestEnum.class);
assertThat(TestEnum.ONE.getDeclaringClass()).isEqualTo(TestEnum.class);
assertThat(TestEnum.ONE.getClass()).isNotEqualTo(TestEnum.TWO.getClass());
ObjectCodecRegistry underTest =
ObjectCodecRegistry.newBuilder()
.setAllowDefaultCodec(true)
.addClassName(TestEnum.class.getName())
.addClassName(TestEnum.ONE.getClass().getName())
.addClassName(TestEnum.TWO.getClass().getName())
.addClassName(TestEnum.THREE.getClass().getName())
.build();
CodecDescriptor oneDescriptor = underTest.getCodecDescriptorForObject(TestEnum.ONE);
CodecDescriptor twoDescriptor = underTest.getCodecDescriptorForObject(TestEnum.TWO);
assertThat(oneDescriptor).isEqualTo(twoDescriptor);
assertThat(oneDescriptor.getCodec().getEncodedClass()).isEqualTo(TestEnum.class);
}
}
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