老李分享：Robotium编写测试用例如何模拟Junit4的BeforeClass和AfterClass方法1 - 条件判断法

老李分享：Robotium编写测试用例如何模拟Junit4的BeforeClass和AfterClass方法1 - 条件判断法

poptest是国内唯一一家培养测试开发工程师的培训机构，以学员能胜任自动化测试，性能测试，测试工具开发等工作为目标。如果对课程感兴趣，请大家咨询qq：908821478，咨询电话010-84505200。Robotium的测试类ActivityInstrumentationTestCase2是继承于Junit3的TestCase类，所以并没有提供Junit4的特性.如网上总结说的 不能通过annotate的方式来识别子类的新特征，如不能实现@beforeclass，@afterclass等特征。只能通过写setup和teardown，

TestCase只能以test开头进行测试case书写。

那么有时我们并不想每次开始/完成一个case的时候都做一些重复的动作，也就是要实现Junit4的@beforeclass和@afterclass，该怎么办呢？
以SDK自带的Notepad测试用例作为例子，假如现在我们需要实现两个测试用例
testAddNoteCNTittle:创建一个中文标题的笔记

testAddNoteEngTitle:创建一个英文标题的笔记

根据实例提供的代码，在setup里面会初始化solo而在teardown里面会关闭所有打开的activities，也就是说每执行一个case都会重新初始化一次solo和关闭所有的activities：
@Override public void setUp() throws Exception { //setUp() is run before a test case is started. //This is where the solo object is created. super.setUp(); this.activity = this.getActivity(); this.solo = new Solo(getInstrumentation(), getActivity()); } @Override public void tearDown() throws Exception { //tearDown() is run after a test case has finished. //finishOpenedActivities() will finish all the activities that have been opened during the test execution. solo.finishOpenedActivities(); }但事实上我们在这个脚本只是去创建两个Note，并不需要每执行完一个case都要去初始化solo和关闭所有activities。google后没有发现有现成的取代@beforeclass和@aferclass的方法。
以下本人的实现方法
<pre name="code" class="java">package com.example.android.notepad.test; import com.robotium.solo.Solo; import android.test.ActivityInstrumentationTestCase2;import android.app.Activity; @SuppressWarnings("rawtypes")public class TCCreateNote extends ActivityInstrumentationTestCase2{ private static Solo solo = null; public Activity activity; <span style="white-space:pre"> </span>private static final int NUMBER_TOTAL_CASES = 2; private static int run = 0; private static Class<?> launchActivityClass; //对应re-sign.jar生成出来的信息框里的两个值 private static String mainActiviy = "com.example.android.notepad.NotesList"; private static String packageName = "com.example.android.notepad"; static { try { launchActivityClass = Class.forName(mainActiviy); } catch (ClassNotFoundException e) { throw new RuntimeException(e); } } @SuppressWarnings("unchecked") public TCCreateNote() { super(packageName, launchActivityClass); } @Override public void setUp() throws Exception { //setUp() is run before a test case is started. //This is where the solo object is created. super.setUp();<span style="white-space:pre"> </span>//The variable solo has to be static, since every time after a case's finished, this class TCCreateNote would be re-instantiated // which would lead to soto to re-instantiated to be null if it's not set as static if(solo == null) { TCCreateNote.solo = new Solo(getInstrumentation(), getActivity()); } } @Override public void tearDown() throws Exception { //Check whether it's the last case executed. run += countTestCases(); if(run >= NUMBER_TOTAL_CASES) { solo.finishOpenedActivities(); } } public void testAddNoteCNTitle() throws Exception { solo.clickOnMenuItem("Add note"); solo.enterText(0, "中文标签笔记"); solo.clickOnMenuItem("Save"); solo.clickInList(0); solo.clearEditText(0); solo.enterText(0, "Text 1"); solo.clickOnMenuItem("Save"); solo.assertCurrentActivity("Expected NotesList Activity", "NotesList"); solo.clickLongOnText("中文标签笔记"); solo.clickOnText("Delete"); } public void testAddNoteEngTitle() throws Exception { solo.clickOnMenuItem("Add note"); solo.enterText(0, "English Title Note"); solo.clickOnMenuItem("Save"); solo.clickInList(0); solo.clearEditText(0); solo.enterText(0, "Text 1"); solo.clickOnMenuItem("Save"); solo.assertCurrentActivity("Expected NotesList Activity", "NotesList"); solo.clickLongOnText("English Title Note"); solo.clickOnText("Delete"); }}