src/third_party/protobuf/java/src/test/java/com/google/protobuf/NestedBuildersTest.java

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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
  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
  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
 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
 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
 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
 179   public void testGettingBuilderMarksFieldAsHaving() {
 180     Vehicle.Builder vehicleBuilder = Vehicle.newBuilder();
 181     vehicleBuilder.getEngineBuilder();
 182     Vehicle vehicle = vehicleBuilder.buildPartial();
 183     assertTrue(vehicle.hasEngine());
 184   }
 185 }