1 // Protocol Buffers - Google's data interchange format
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30 
31 package com.google.protobuf;
32 
33 import protobuf_unittest.Vehicle;
34 import protobuf_unittest.Wheel;
35 import java.util.ArrayList;
36 import java.util.List;
37 import junit.framework.TestCase;
38 
39 /**
40  * Test cases that exercise end-to-end use cases involving {@link SingleFieldBuilder} and {@link
41  * RepeatedFieldBuilder}.
42  *
43  * @author jonp@google.com (Jon Perlow)
44  */
45 public class NestedBuildersTest extends TestCase {
46 
testMessagesAndBuilders()47   public void testMessagesAndBuilders() {
48     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
49     vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(1);
50     vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(2);
51     vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(3);
52     vehicleBuilder.addWheelBuilder().setRadius(4).setWidth(4);
53     vehicleBuilder.getEngineBuilder().setLiters(10);
54 
55     Vehicle vehicle = vehicleBuilder.build();
56     assertEquals(4, vehicle.getWheelCount());
57     for (int i = 0; i < 4; i++) {
58       Wheel wheel = vehicle.getWheel(i);
59       assertEquals(4, wheel.getRadius());
60       assertEquals(i + 1, wheel.getWidth());
61     }
62     assertEquals(10, vehicle.getEngine().getLiters());
63 
64     for (int i = 0; i < 4; i++) {
65       vehicleBuilder.getWheelBuilder(i).setRadius(5).setWidth(i + 10);
66     }
67     vehicleBuilder.getEngineBuilder().setLiters(20);
68 
69     vehicle = vehicleBuilder.build();
70     for (int i = 0; i < 4; i++) {
71       Wheel wheel = vehicle.getWheel(i);
72       assertEquals(5, wheel.getRadius());
73       assertEquals(i + 10, wheel.getWidth());
74     }
75     assertEquals(20, vehicle.getEngine().getLiters());
76     assertTrue(vehicle.hasEngine());
77   }
78 
testMessagesAreCached()79   public void testMessagesAreCached() {
80     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
81     vehicleBuilder.addWheelBuilder().setRadius(1).setWidth(2);
82     vehicleBuilder.addWheelBuilder().setRadius(3).setWidth(4);
83     vehicleBuilder.addWheelBuilder().setRadius(5).setWidth(6);
84     vehicleBuilder.addWheelBuilder().setRadius(7).setWidth(8);
85 
86     // Make sure messages are cached.
87     List<Wheel> wheels = new ArrayList<Wheel>(vehicleBuilder.getWheelList());
88     for (int i = 0; i < wheels.size(); i++) {
89       assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
90     }
91 
92     // Now get builders and check they didn't change.
93     for (int i = 0; i < wheels.size(); i++) {
94       vehicleBuilder.getWheel(i);
95     }
96     for (int i = 0; i < wheels.size(); i++) {
97       assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
98     }
99 
100     // Change just one
101     vehicleBuilder.getWheelBuilder(3).setRadius(20).setWidth(20);
102 
103     // Now get wheels and check that only that one changed
104     for (int i = 0; i < wheels.size(); i++) {
105       if (i < 3) {
106         assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
107       } else {
108         assertNotSame(wheels.get(i), vehicleBuilder.getWheel(i));
109       }
110     }
111   }
112 
testRemove_WithNestedBuilders()113   public void testRemove_WithNestedBuilders() {
114     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
115     vehicleBuilder.addWheelBuilder().setRadius(1).setWidth(1);
116     vehicleBuilder.addWheelBuilder().setRadius(2).setWidth(2);
117     vehicleBuilder.removeWheel(0);
118 
119     assertEquals(1, vehicleBuilder.getWheelCount());
120     assertEquals(2, vehicleBuilder.getWheel(0).getRadius());
121   }
122 
testRemove_WithNestedMessages()123   public void testRemove_WithNestedMessages() {
124     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
125     vehicleBuilder.addWheel(Wheel.newBuilder().setRadius(1).setWidth(1));
126     vehicleBuilder.addWheel(Wheel.newBuilder().setRadius(2).setWidth(2));
127     vehicleBuilder.removeWheel(0);
128 
129     assertEquals(1, vehicleBuilder.getWheelCount());
130     assertEquals(2, vehicleBuilder.getWheel(0).getRadius());
131   }
132 
testMerge()133   public void testMerge() {
134     Vehicle vehicle1 =
135         Vehicle.newBuilder()
136             .addWheel(Wheel.newBuilder().setRadius(1).build())
137             .addWheel(Wheel.newBuilder().setRadius(2).build())
138             .build();
139 
140     Vehicle vehicle2 = Vehicle.newBuilder().mergeFrom(vehicle1).build();
141     // List should be the same -- no allocation
142     assertSame(vehicle1.getWheelList(), vehicle2.getWheelList());
143 
144     Vehicle vehicle3 = vehicle1.toBuilder().build();
145     assertSame(vehicle1.getWheelList(), vehicle3.getWheelList());
146   }
147 
testGettingBuilderMarksFieldAsHaving()148   public void testGettingBuilderMarksFieldAsHaving() {
149     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
150     vehicleBuilder.getEngineBuilder();
151     Vehicle vehicle = vehicleBuilder.buildPartial();
152     assertTrue(vehicle.hasEngine());
153   }
154 }
155