1. TestClass
// 源码:org.junit.runners.model.TestClass
// 该方法主要提供方法校验和注解搜索
public class TestClass implements Annotatable{
private static final FieldComparator FIELD_COMPARATOR = new FieldComparator();
private static final MethodComparator METHOD_COMPARATOR = new MethodComparator();
// 三个成员变量
private final Class<?> clazz;
private final Map<Class<? extends Annotation>, List<FrameworkMethod>> methodsForAnnotations;
private final Map<Class<? extends Annotation>, List<FrameworkField>> fieldsForAnnotations;
// 由于JDK对标注的处理代价高昂,此处,构造器的作用是为了保证实例的共用
public TestClass(Class<?> clazz){
this.clazz = clazz;
if(clazz != null && clazz.getConstructors().length > 1){
throw new IllegalArgumentException(
"Test class can only have one constructor");
}
Map<Class<? extends Annotation>, List<FrameworkMethod>> methodsForAnnotations =
new LinkedHashMap<Class<? extends Annotation>, List<FrameworkMehod>>();
Map<Class<? extends Annotation>, List<FrameworkField>> fieldsForAnnotations =
new LinkedHashMap<Class<? extends Annotation>, List<FrameworkField>>();
scanAnnotatedMembers(methodsForAnnotations, fieldsForAnnotations);
this.methodsForAnnotations = makeDeeplyUnmodifiable(methodsForAnnotations);
this.fieldsForAnnotations = makeDeeplyUnmodifiable(fieldsForAnnotations);
}
...(略)
}
// 测试代码
public class TestUnit(){
public TestUnit(){}
@Test
public void addx(int x){
assertEquals(5, 1+x);
}
@Test
public void add(){
assertEquals(5.0, 4.0, 0.1);
}
@Test
public void hello(){
assertEquals(5.0, 4.0, 0.1);
}
}
public class TestClassDemo{
public static void main(String[] args) throws Throwable{
TestClass kclass = new TestClass(TestUnit.class);
System.out.println(kclass.getName());
// Test.class 就是类中标明 @Test 注解的方法
List<FrameworkMethod> list = kclass.getAnnotatedMethods(Test.class);
for(FrameworkMethod fm : list){
try{
fm.invokeExplosively((TestUnit)kclass.getJavaClass().newInstance(), new Object[0]);
}catch(Throwable e){
System.out.println(e);
}finally{
System.out.println(fm.getName() + " invoked!");
}
}
}
}
参考资料: