/**
* 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.sitebricks.stat;
import com.google.common.collect.Lists;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.List;
import static org.testng.Assert.assertEquals;
/**
* This class includes tests for the logic within {@link StatReaders}.
*
* @author ffaber@gmail.com (Fred Faber)
*/
public class StatReadersTest {
static class TestClass {
static Integer staticField;
static Integer getStaticFieldValue() {
return staticField;
}
Integer instanceField;
Integer getInstanceFieldValue() {
return instanceField;
}
}
static final Integer STATIC_FIELD_STARTING_VALUE = 1;
static final Integer INSTANCE_FIELD_STARTING_VALUE = 2;
Field staticField;
Method staticMethod;
Field instanceField;
Method instanceMethod;
TestClass testClass;
@BeforeMethod
public void setUp() throws Exception {
testClass = new TestClass();
TestClass.staticField = STATIC_FIELD_STARTING_VALUE;
testClass.instanceField = INSTANCE_FIELD_STARTING_VALUE;
staticField = TestClass.class.getDeclaredField("staticField");
staticMethod = TestClass.class.getDeclaredMethod("getStaticFieldValue");
instanceField = TestClass.class.getDeclaredField("instanceField");
instanceMethod = TestClass.class.getDeclaredMethod("getInstanceFieldValue");
}
@Test
public void testInstanceFieldReader() {
StatReader statReader = StatReaders.forField(instanceField, testClass);
assertEquals(testClass.instanceField, statReader.readStat());
// Mutate the field and confirm that its updated value is read.
testClass.instanceField++;
assertEquals(testClass.instanceField, statReader.readStat());
}
@Test public void testStaticFieldReader() {
StatReader statReader = StatReaders.forStaticField(staticField);
assertEquals(TestClass.staticField, statReader.readStat());
// Mutate the field and confirm that its updated value is read.
TestClass.staticField++;
assertEquals(TestClass.staticField, statReader.readStat());
}
@Test public void testInstanceMethodReader() {
StatReader statReader = StatReaders.forMethod(instanceMethod, testClass);
assertEquals(testClass.getInstanceFieldValue(), statReader.readStat());
// Mutate the field and confirm that its updated value is read.
testClass.instanceField++;
assertEquals(testClass.getInstanceFieldValue(), statReader.readStat());
}
@Test public void testStaticMethodReader() {
StatReader statReader = StatReaders.forStaticMethod(staticMethod);
assertEquals(TestClass.getStaticFieldValue(), statReader.readStat());
// Mutate the field and confirm that its updated value is read.
TestClass.staticField++;
assertEquals(TestClass.getStaticFieldValue(), statReader.readStat());
}
@Test public void testInstanceMemberReader_forField() {
StatReader memberReader = StatReaders.forMember(instanceField, testClass);
StatReader fieldReader = StatReaders.forField(instanceField, testClass);
assertEquals(memberReader, fieldReader);
}
@Test public void testInstanceMemberReader_forMethod() {
StatReader memberReader = StatReaders.forMember(instanceMethod, testClass);
StatReader methodReader = StatReaders.forMethod(instanceMethod, testClass);
assertEquals(memberReader, methodReader);
}
@Test public void testStaticMemberReader_forField() {
StatReader memberReader = StatReaders.forStaticMember(staticField);
StatReader fieldReader = StatReaders.forStaticField(staticField);
assertEquals(memberReader, fieldReader);
}
@Test public void testStaticMemberReader_forMember() {
StatReader memberReader = StatReaders.forStaticMember(staticMethod);
StatReader methodReader = StatReaders.forStaticMethod(staticMethod);
assertEquals(memberReader, methodReader );
}
@Test public void testObjectReader() {
List<Integer> statList = Lists.newArrayList(1, 2);
StatReader statReader = StatReaders.forObject(statList);
assertEquals(statList, statReader.readStat());
// If we add a value, we expect it to be reflected in the stat that is read
statList.add(3);
assertEquals(statList, statReader.readStat());
}
}