| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * 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.caliper.memory; |
| |
| import com.google.caliper.memory.ObjectGraphMeasurer.Footprint; |
| import com.google.common.collect.ImmutableMultiset; |
| |
| import junit.framework.TestCase; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** |
| * Tests for ObjectGraphMeasurer. |
| */ |
| @RunWith(JUnit4.class) |
| public class ObjectGraphMeasurerTest extends TestCase { |
| enum DummyEnum { |
| VALUE; |
| } |
| static final Object oneEnumField = new Object() { |
| @SuppressWarnings("unused") DummyEnum enumField = DummyEnum.VALUE; |
| }; |
| |
| // enums are treated as statics (and ignored) |
| @Test public void testEnum() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(oneEnumField); |
| assertEquals(new Footprint(1, 1, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static final Object oneClassField = new Object() { |
| @SuppressWarnings("unused") Class<?> clazz = Object.class; |
| }; |
| |
| // Class instances are treated as statics (and ignored) |
| @Test public void testClass() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(oneClassField); |
| assertEquals(new ObjectGraphMeasurer.Footprint(1, 1, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static final Object oneObjectField = new Object() { |
| @SuppressWarnings("unused") Object objectField = new Object(); |
| }; |
| |
| @Test public void testObject() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(oneObjectField); |
| assertEquals(new ObjectGraphMeasurer.Footprint(2, 1, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static final Object withCycle = new Object() { |
| Object[] array = new Object[1]; |
| { |
| array[0] = this; |
| } |
| }; |
| |
| @Test public void testCycle() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(withCycle); |
| assertEquals(new ObjectGraphMeasurer.Footprint(2, 2, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static final Object multiplePathsToObject = new Object() { |
| Object object = new Object(); |
| @SuppressWarnings("unused") Object ref1 = object; |
| @SuppressWarnings("unused") Object ref2 = object; |
| }; |
| |
| @Test public void testMultiplePathsToObject() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(multiplePathsToObject); |
| assertEquals(new ObjectGraphMeasurer.Footprint(2, 3, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static final Object multiplePathsToClass = new Object() { |
| Object object = Object.class; |
| @SuppressWarnings("unused") Object ref1 = object; |
| @SuppressWarnings("unused") Object ref2 = object; |
| }; |
| |
| @Test public void testMultiplePathsToClass() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(multiplePathsToClass); |
| assertEquals(new ObjectGraphMeasurer.Footprint(1, 3, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| static class WithStaticField { |
| static WithStaticField INSTANCE = new WithStaticField(); |
| } |
| |
| @Test public void testStaticFields() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(new WithStaticField()); |
| assertEquals(new ObjectGraphMeasurer.Footprint(1, 0, 0, NO_PRIMITIVES), footprint); |
| } |
| |
| @SuppressWarnings("unused") // unused test fields |
| static final Object oneNullOneNonNull = new Object() { |
| Object nonNull1 = new Object(); |
| Object nonNull2 = nonNull1; |
| Object null1 = null; |
| Object null2 = null; |
| Object null3 = null; |
| }; |
| |
| @Test public void testNullField() { |
| ObjectGraphMeasurer.Footprint footprint = ObjectGraphMeasurer.measure(oneNullOneNonNull); |
| assertEquals(new ObjectGraphMeasurer.Footprint(2, 2, 3, NO_PRIMITIVES), footprint); |
| } |
| |
| private static final ImmutableMultiset<Class<?>> NO_PRIMITIVES = ImmutableMultiset.of(); |
| } |