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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 org.junit.Assert.assertThrows;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoInteractions;
import static org.mockito.Mockito.when;
import com.google.common.collect.ClassToInstanceMap;
import com.google.common.collect.ImmutableClassToInstanceMap;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.skyframe.serialization.ObjectCodec.MemoizationStrategy;
import com.google.protobuf.CodedInputStream;
import java.io.IOException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link DeserializationContext}. */
@RunWith(JUnit4.class)
public final class DeserializationContextTest {
@Test
public void nullDeserialize() throws Exception {
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
when(codedInputStream.readSInt32()).thenReturn(0);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of());
assertThat((Object) deserializationContext.deserialize(codedInputStream)).isNull();
verify(codedInputStream).readSInt32();
verifyNoInteractions(registry);
}
@Test
public void constantDeserialize() throws Exception {
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
Object constant = new Object();
when(registry.maybeGetConstantByTag(1)).thenReturn(constant);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
when(codedInputStream.readSInt32()).thenReturn(1);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of());
assertThat((Object) deserializationContext.deserialize(codedInputStream))
.isSameInstanceAs(constant);
verify(codedInputStream).readSInt32();
verify(registry).maybeGetConstantByTag(1);
}
@Test
public void descriptorDeserialize() throws Exception {
ObjectCodecRegistry.CodecDescriptor codecDescriptor =
mock(ObjectCodecRegistry.CodecDescriptor.class);
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
when(registry.getCodecDescriptorByTag(1)).thenReturn(codecDescriptor);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
when(codedInputStream.readSInt32()).thenReturn(1);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of());
Object returnValue = new Object();
when(codecDescriptor.deserialize(deserializationContext, codedInputStream))
.thenReturn(returnValue);
assertThat((Object) deserializationContext.deserialize(codedInputStream))
.isSameInstanceAs(returnValue);
verify(codedInputStream).readSInt32();
verify(registry).getCodecDescriptorByTag(1);
verify(codecDescriptor).deserialize(deserializationContext, codedInputStream);
}
@Test
public void memoizingDeserialize_null() throws SerializationException, IOException {
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of());
when(codedInputStream.readSInt32()).thenReturn(0);
assertThat((Object) deserializationContext.getMemoizingContext().deserialize(codedInputStream))
.isEqualTo(null);
verify(codedInputStream).readSInt32();
verifyNoInteractions(registry);
}
@Test
public void memoizingDeserialize_constant() throws SerializationException, IOException {
Object constant = new Object();
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
when(registry.maybeGetConstantByTag(1)).thenReturn(constant);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of());
when(codedInputStream.readSInt32()).thenReturn(1);
assertThat((Object) deserializationContext.getMemoizingContext().deserialize(codedInputStream))
.isEqualTo(constant);
verify(codedInputStream).readSInt32();
verify(registry).maybeGetConstantByTag(1);
}
@Test
public void memoizingDeserialize_codec() throws SerializationException, IOException {
Object returned = new Object();
@SuppressWarnings("unchecked")
ObjectCodec<Object> codec = mock(ObjectCodec.class);
when(codec.getStrategy()).thenReturn(MemoizationStrategy.MEMOIZE_AFTER);
when(codec.getEncodedClass()).thenAnswer(unused -> Object.class);
when(codec.additionalEncodedClasses()).thenReturn(ImmutableList.of());
ObjectCodecRegistry.CodecDescriptor codecDescriptor =
mock(ObjectCodecRegistry.CodecDescriptor.class);
doReturn(codec).when(codecDescriptor).getCodec();
ObjectCodecRegistry registry = mock(ObjectCodecRegistry.class);
when(registry.getCodecDescriptorByTag(1)).thenReturn(codecDescriptor);
CodedInputStream codedInputStream = mock(CodedInputStream.class);
DeserializationContext deserializationContext =
new DeserializationContext(registry, ImmutableClassToInstanceMap.of())
.getMemoizingContext();
when(codec.deserialize(deserializationContext, codedInputStream)).thenReturn(returned);
when(codedInputStream.readSInt32()).thenReturn(1);
assertThat((Object) deserializationContext.deserialize(codedInputStream)).isEqualTo(returned);
verify(codedInputStream).readSInt32();
verify(registry).maybeGetConstantByTag(1);
verify(registry).getCodecDescriptorByTag(1);
verify(codecDescriptor).getCodec();
verify(codec).deserialize(deserializationContext, codedInputStream);
}
@Test
public void getDependency() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of(String.class, "abc"));
assertThat(context.getDependency(String.class)).isEqualTo("abc");
}
@Test
public void getDependency_notPresent() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of());
Exception e =
assertThrows(NullPointerException.class, () -> context.getDependency(String.class));
assertThat(e).hasMessageThat().contains("Missing dependency of type " + String.class);
}
@Test
public void dependencyOverrides_alreadyPresent() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of(String.class, "abc"));
DeserializationContext overridden =
context.withDependencyOverrides(ImmutableClassToInstanceMap.of(String.class, "xyz"));
assertThat(overridden.getDependency(String.class)).isEqualTo("xyz");
}
@Test
public void dependencyOverrides_new() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of(String.class, "abc"));
DeserializationContext overridden =
context.withDependencyOverrides(ImmutableClassToInstanceMap.of(Integer.class, 1));
assertThat(overridden.getDependency(Integer.class)).isEqualTo(1);
}
@Test
public void dependencyOverrides_unchanged() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of(String.class, "abc"));
DeserializationContext overridden =
context.withDependencyOverrides(ImmutableClassToInstanceMap.of(Integer.class, 1));
assertThat(overridden.getDependency(String.class)).isEqualTo("abc");
}
@Test
public void dependencyOverrides_disallowedOnMemoizingContext() {
DeserializationContext context =
new DeserializationContext(
mock(ObjectCodecRegistry.class), ImmutableClassToInstanceMap.of());
DeserializationContext memoizing = context.getMemoizingContext();
ClassToInstanceMap<?> overrides = ImmutableClassToInstanceMap.of(Integer.class, 1);
assertThrows(IllegalStateException.class, () -> memoizing.withDependencyOverrides(overrides));
}
}