问个JUNIT语法的问题

[flying520520]

/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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 android.os.cts;

import android.content.Context;
import android.os.Vibrator;
import android.test.AndroidTestCase;
import android.util.Log;
import dalvik.annotation.TestTargets;
import dalvik.annotation.TestTargetNew;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;

@TestTargetClass(Vibrator.class)
public class VibratorTest extends AndroidTestCase {

private Vibrator mVibrator;

@Override
protected void setUp() throws Exception {
super.setUp();
mVibrator = (Vibrator) getContext().getSystemService(Context.VIBRATOR_SERVICE);
}

@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test cancel()",
method = "cancel",
args = {}
)
public void testVibratorCancel() {
try {
mVibrator.vibrate(1000);
} catch (Exception e) {
fail("testVibratorCancel failed!");
}
sleep();
try {
mVibrator.cancel();
} catch (Exception e) {
fail("testVibratorCancel failed!");
}
}

@TestTargets({
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test vibrate",
method = "vibrate",
args = {long[].class, int.class}
),
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test vibrate",
method = "vibrate",
args = {long.class}
)
})
public void testVibratePattern() {
long[] pattern = {100, 200, 400, 800, 1600};
try {
mVibrator.vibrate(pattern, 3);
} catch (Exception e) {
fail("vibrate failed!");
}
try {
mVibrator.vibrate(pattern, 10);
fail("Should throw ArrayIndexOutOfBoundsException");
} catch (ArrayIndexOutOfBoundsException e) {
}
sleep();
}

@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test vibrator with multi thread.",
method = "vibrate",
args = {long.class}
)
public void testVibrateMultiThread() {
Log.d("*******VibratorTest", "MultiTreadTest");
new Thread(new Runnable() {
public void run() {
Log.d("*******VibratorTest", "Thread 1");
try {
mVibrator.vibrate(100);
} catch (Exception e) {
fail("MultiThread fail1");
}
}
}).start();
new Thread(new Runnable() {
public void run() {
Log.d("*******VibratorTest", "Thread 2");
try {
// This test only get two threads to run vibrator at the same time
// for a functional test,
// but it can not verify if the second thread get the precedence.
mVibrator.vibrate(1000);
} catch (Exception e) {
fail("MultiThread fail2");
}
}
}).start();
sleep();
}

private void sleep() {
try {
Thread.sleep(10000);
} catch (Exception e) {
}
}
}





问个低级的问题：下面这段是什么意思呀？ @TestTargets是什么意思呀？
@TestTargets({
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test vibrate",
method = "vibrate",
args = {long[].class, int.class}
),
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "Test vibrate",
method = "vibrate",
args = {long.class}
)
})

[Landor2004]

这不是junit，这是google 的Android SDK 中的一部分，下面是他的API说明

http://docs.generalwebtech.com/java/android-javadoc-1.1_r1/dalvik/annotation/TestTargets.html
http://docs.generalwebtech.com/java/android-javadoc-1.1_r1/dalvik/annotation/TestTargetNew.html

[flying520520]

Java5之后就出现了Java Annotation（JSR 175），第一眼看上去很像是C/C++的预编译，或者条件编译。可以告诉编译器应该做些什么事情之类的，但是情况其实并非如此，这个东西还是很有些不同之处，从一个用户的角度看，大体上可以用来做三件事体：

1. 编译器注释。JSR175提供了几个默认的Annotation，包括@Deprecated、@Override和@SuppressWarnings

2.文档化支持。Sun说可以替代JavaDoc的一些用途，但是也并没有新增什么，而且和注释相比，Annotation有作用域的限制，即不可以放到代码的各个位置，支持：TYPE、FIELD、METHOD、PARAMETER、CONSTRUCTOR、LOCAL_VARIABLE、 ANNOTATION_TYPE、PACKAGE。当然这些位置适用于所有的Annotation。

3.运行时支持。Annotation可以混合代码和元代码，而且支持设定到底是否在字节码中包含Annotation。如果包含，则可以使用 Reflection激活这些Annotation。Sun给出了类似单元测试的例子。不过似乎和我无关，Junit已经干的很不错了。

感觉Annotation似乎是一个大而全的方案，但是反而无法获得更多的应用。作为编译器注释，显然没有ifdef能力那么强，作为文档化支持，Javadoc早就广泛应用，作为runtime支持，则Junit这类物件也很完善了。

XDoclet Team不过XDoclet看上去是有希望的项目，这玩意儿可以通过源代码中的注释标签生成多种多样的副产品，包括源代码、接口、XML、文档等等。本来是没有什么好处的，但是目前J2EE的复杂性导致的大量冗余工作却可以使用注释来消除，具有如下好处：

[flying520520]

谢谢

请顶

[flying520520]

[Quote=引用 1 楼 landor2004 的回复:]

这不是junit，这是google 的Android SDK 中的一部分，下面是他的API说明

http://docs.generalwebtech.com/java/android-javadoc-1.1_r1/dalvik/annotation/TestTargets.html
http://docs.generalwebtech.com/java/android-javadoc-1……
[/Quote]

看了，但还是不能理解，这些东西后括号里面的东西有什么用呀。
不懂JAVA，请指教