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 
36 import junit.framework.TestCase;
37 
38 import java.util.List;
39 import java.util.ArrayList;
40 
41 /**
42  * Test cases that exercise end-to-end use cases involving
43  * {@link SingleFieldBuilder} and {@link RepeatedFieldBuilder}.
44  *
45  * @author jonp@google.com (Jon Perlow)
46  */
47 public class NestedBuildersTest extends TestCase {
48 
testMessagesAndBuilders()49   public void testMessagesAndBuilders() {
50     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
51     vehicleBuilder.addWheelBuilder()
52         .setRadius(4)
53         .setWidth(1);
54     vehicleBuilder.addWheelBuilder()
55         .setRadius(4)
56         .setWidth(2);
57     vehicleBuilder.addWheelBuilder()
58         .setRadius(4)
59         .setWidth(3);
60     vehicleBuilder.addWheelBuilder()
61         .setRadius(4)
62         .setWidth(4);
63     vehicleBuilder.getEngineBuilder()
64         .setLiters(10);
65 
66     Vehicle vehicle = vehicleBuilder.build();
67     assertEquals(4, vehicle.getWheelCount());
68     for (int i = 0; i < 4; i++) {
69       Wheel wheel = vehicle.getWheel(i);
70       assertEquals(4, wheel.getRadius());
71       assertEquals(i + 1, wheel.getWidth());
72     }
73     assertEquals(10, vehicle.getEngine().getLiters());
74 
75     for (int i = 0; i < 4; i++) {
76       vehicleBuilder.getWheelBuilder(i)
77           .setRadius(5)
78           .setWidth(i + 10);
79     }
80     vehicleBuilder.getEngineBuilder().setLiters(20);
81 
82     vehicle = vehicleBuilder.build();
83     for (int i = 0; i < 4; i++) {
84       Wheel wheel = vehicle.getWheel(i);
85       assertEquals(5, wheel.getRadius());
86       assertEquals(i + 10, wheel.getWidth());
87     }
88     assertEquals(20, vehicle.getEngine().getLiters());
89     assertTrue(vehicle.hasEngine());
90   }
91 
testMessagesAreCached()92   public void testMessagesAreCached() {
93     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
94     vehicleBuilder.addWheelBuilder()
95         .setRadius(1)
96         .setWidth(2);
97     vehicleBuilder.addWheelBuilder()
98         .setRadius(3)
99         .setWidth(4);
100     vehicleBuilder.addWheelBuilder()
101         .setRadius(5)
102         .setWidth(6);
103     vehicleBuilder.addWheelBuilder()
104         .setRadius(7)
105         .setWidth(8);
106 
107     // Make sure messages are cached.
108     List<Wheel> wheels = new ArrayList<Wheel>(vehicleBuilder.getWheelList());
109     for (int i = 0; i < wheels.size(); i++) {
110       assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
111     }
112 
113     // Now get builders and check they didn't change.
114     for (int i = 0; i < wheels.size(); i++) {
115       vehicleBuilder.getWheel(i);
116     }
117     for (int i = 0; i < wheels.size(); i++) {
118       assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
119     }
120 
121     // Change just one
122     vehicleBuilder.getWheelBuilder(3)
123         .setRadius(20).setWidth(20);
124 
125     // Now get wheels and check that only that one changed
126     for (int i = 0; i < wheels.size(); i++) {
127       if (i < 3) {
128         assertSame(wheels.get(i), vehicleBuilder.getWheel(i));
129       } else {
130         assertNotSame(wheels.get(i), vehicleBuilder.getWheel(i));
131       }
132     }
133   }
134 
testRemove_WithNestedBuilders()135   public void testRemove_WithNestedBuilders() {
136     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
137     vehicleBuilder.addWheelBuilder()
138         .setRadius(1)
139         .setWidth(1);
140     vehicleBuilder.addWheelBuilder()
141         .setRadius(2)
142         .setWidth(2);
143     vehicleBuilder.removeWheel(0);
144 
145     assertEquals(1, vehicleBuilder.getWheelCount());
146     assertEquals(2, vehicleBuilder.getWheel(0).getRadius());
147   }
148 
testRemove_WithNestedMessages()149   public void testRemove_WithNestedMessages() {
150     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
151     vehicleBuilder.addWheel(Wheel.newBuilder()
152         .setRadius(1)
153         .setWidth(1));
154     vehicleBuilder.addWheel(Wheel.newBuilder()
155         .setRadius(2)
156         .setWidth(2));
157     vehicleBuilder.removeWheel(0);
158 
159     assertEquals(1, vehicleBuilder.getWheelCount());
160     assertEquals(2, vehicleBuilder.getWheel(0).getRadius());
161   }
162 
testMerge()163   public void testMerge() {
164     Vehicle vehicle1 = Vehicle.newBuilder()
165         .addWheel(Wheel.newBuilder().setRadius(1).build())
166         .addWheel(Wheel.newBuilder().setRadius(2).build())
167         .build();
168 
169     Vehicle vehicle2 = Vehicle.newBuilder()
170         .mergeFrom(vehicle1)
171         .build();
172     // List should be the same -- no allocation
173     assertSame(vehicle1.getWheelList(), vehicle2.getWheelList());
174 
175     Vehicle vehicle3 = vehicle1.toBuilder().build();
176     assertSame(vehicle1.getWheelList(), vehicle3.getWheelList());
177   }
178 
testGettingBuilderMarksFieldAsHaving()179   public void testGettingBuilderMarksFieldAsHaving() {
180     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
181     vehicleBuilder.getEngineBuilder();
182     Vehicle vehicle = vehicleBuilder.buildPartial();
183     assertTrue(vehicle.hasEngine());
184   }
185 }
186