// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
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// distribution.
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package com.google.protobuf;
import static com.google.common.truth.Truth.assertThat;
import protobuf_unittest.Engine;
import protobuf_unittest.TimingBelt;
import protobuf_unittest.Vehicle;
import protobuf_unittest.Wheel;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Test cases that exercise end-to-end use cases involving {@link SingleFieldBuilder} and {@link
* RepeatedFieldBuilder}.
*/
@RunWith(JUnit4.class)
public class NestedBuildersTest {
@Test
public void test3LayerPropagationWithIntermediateClear() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.getEngineBuilder().getTimingBeltBuilder();
// This step detaches the TimingBelt.Builder (though it leaves a SingleFieldBuilder in place)
vehicleBuilder.getEngineBuilder().clear();
// These steps build the middle and top level messages, it used to leave the vestigial
// TimingBelt.Builder in a state where further changes didn't propagate anymore
Object unused = vehicleBuilder.getEngineBuilder().build();
unused = vehicleBuilder.build();
TimingBelt expected = TimingBelt.newBuilder().setNumberOfTeeth(124).build();
vehicleBuilder.getEngineBuilder().setTimingBelt(expected);
// Testing that b/254158939 is fixed. It used to be that the setTimingBelt call above didn't
// propagate a change notification and the call below would return a stale version of the timing
// belt.
assertThat(vehicleBuilder.getEngine().getTimingBelt()).isEqualTo(expected);
}
@Test
public void testMessagesAndBuilders() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(1);
vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(2);
vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(3);
vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(4);
vehicleBuilder.getEngineBuilder().setLiters(10);
Vehicle vehicle = vehicleBuilder.build();
assertThat(vehicle.getWheelCount()).isEqualTo(4);
for (int i = 0; i < 4; i++) {
Wheel wheel = vehicle.getWheel(i);
assertThat(wheel.getRadius()).isEqualTo(4);
assertThat(wheel.getWidth()).isEqualTo(i + 1);
}
assertThat(vehicle.getEngine().getLiters()).isEqualTo(10);
for (int i = 0; i < 4; i++) {
vehicleBuilder.getWheelBuilder(i).setRadius(5).setWidth(i + 10);
}
Engine.Builder engineBuilder = vehicleBuilder.getEngineBuilder().setLiters(20);
vehicle = vehicleBuilder.build();
for (int i = 0; i < 4; i++) {
Wheel wheel = vehicle.getWheel(i);
assertThat(wheel.getRadius()).isEqualTo(5);
assertThat(wheel.getWidth()).isEqualTo(i + 10);
}
assertThat(vehicle.getEngine().getLiters()).isEqualTo(20);
assertThat(vehicle.hasEngine()).isTrue();
engineBuilder.setLiters(50);
assertThat(vehicleBuilder.getEngine().getLiters()).isEqualTo(50);
}
@Test
public void testMessagesAreCached() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.addWheelBuilder().setRadius(1).setWidth(2);
vehicleBuilder.addWheelBuilder().setRadius(3).setWidth(4);
vehicleBuilder.addWheelBuilder().setRadius(5).setWidth(6);
vehicleBuilder.addWheelBuilder().setRadius(7).setWidth(8);
// Make sure messages are cached.
List<Wheel> wheels = new ArrayList<Wheel>(vehicleBuilder.getWheelList());
for (int i = 0; i < wheels.size(); i++) {
assertThat(wheels.get(i)).isSameInstanceAs(vehicleBuilder.getWheel(i));
}
// Now get builders and check they didn't change.
for (int i = 0; i < wheels.size(); i++) {
vehicleBuilder.getWheel(i);
}
for (int i = 0; i < wheels.size(); i++) {
assertThat(wheels.get(i)).isSameInstanceAs(vehicleBuilder.getWheel(i));
}
// Change just one
vehicleBuilder.getWheelBuilder(3).setRadius(20).setWidth(20);
// Now get wheels and check that only that one changed
for (int i = 0; i < wheels.size(); i++) {
if (i < 3) {
assertThat(wheels.get(i)).isSameInstanceAs(vehicleBuilder.getWheel(i));
} else {
assertThat(wheels.get(i)).isNotSameInstanceAs(vehicleBuilder.getWheel(i));
}
}
}
@Test
public void testRemove_WithNestedBuilders() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.addWheelBuilder().setRadius(1).setWidth(1);
vehicleBuilder.addWheelBuilder().setRadius(2).setWidth(2);
vehicleBuilder.removeWheel(0);
assertThat(vehicleBuilder.getWheelCount()).isEqualTo(1);
assertThat(vehicleBuilder.getWheel(0).getRadius()).isEqualTo(2);
}
@Test
public void testRemove_WithNestedMessages() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.addWheel(Wheel.newBuilder().setRadius(1).setWidth(1));
vehicleBuilder.addWheel(Wheel.newBuilder().setRadius(2).setWidth(2));
vehicleBuilder.removeWheel(0);
assertThat(vehicleBuilder.getWheelCount()).isEqualTo(1);
assertThat(vehicleBuilder.getWheel(0).getRadius()).isEqualTo(2);
}
@Test
public void testMerge() {
Vehicle vehicle1 =
Vehicle.newBuilder()
.addWheel(Wheel.newBuilder().setRadius(1).build())
.addWheel(Wheel.newBuilder().setRadius(2).build())
.build();
Vehicle vehicle2 = Vehicle.newBuilder().mergeFrom(vehicle1).build();
// List should be the same -- no allocation
assertThat(vehicle1.getWheelList()).isSameInstanceAs(vehicle2.getWheelList());
Vehicle vehicle3 = vehicle1.toBuilder().build();
assertThat(vehicle1.getWheelList()).isSameInstanceAs(vehicle3.getWheelList());
}
@Test
public void testGettingBuilderMarksFieldAsHaving() {
Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
vehicleBuilder.getEngineBuilder();
Vehicle vehicle = vehicleBuilder.buildPartial();
assertThat(vehicle.hasEngine()).isTrue();
}
}
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