Jtest Stub研究学习(3)

知识小结：
本次练习中重点关注了构造方法的打桩处理之一，以及对于包含多个参数类型的处理。

构造方法和多个参数的打桩处理：
这里根据构造方法的类型即可判断处理，并且可以利用Jtest提供的API makeStubObject(java.lang.Class class)来自动构造对象返回，这里使用该API的好处是可以针对多种复杂情况处理，可以不需要调用原构造方法来返回，或者一些未实现的接口情况，使用这种情况更容易处理。《参见Jtest Stub研究学习(1)中详解》

参考代码：大概逻辑和API调用顺序如下：
if(Stubs.matches(java.lang.Member method, java.lang.Class cl))
Class[] argument_types = new Class[]{String.class, String.class}; // 这里的String.class可能是其他只，需要考虑构造方法的参数类型填入合适值
if(Stubs.matches(method, argument_types))
return Stubs.makeStubObject(cl);

待测代码：
package com.parasoftchina.jteststub;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class ConstructorExample {

public static long getFileLength(String path) throws IOException{
RandomAccessFile file = new RandomAccessFile(path, "rw");

return file.length();
}

}

测试用例和桩代码：
/*
* ConstructorExampleTest.java
* 在16-5-20 10:31:15上被Jtest创建.
*/

package com.parasoftchina.jteststub;

import org.junit.Before;
import org.junit.After;
import org.junit.Test;
import java.lang.reflect.Member;
import jtest.Stubs;
import java.io.RandomAccessFile;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import com.parasoftchina.jteststub.ConstructorExample;

/**
* ConstructorExampleTest is a test class for ConstructorExample
*
* @see com.parasoftchina.jteststub.ConstructorExample
* @author Parasoft Jtest 9.6
*/
public class ConstructorExampleTest extends PackageTestCase {

/**
* Constructor for test class.
*
* @author Parasoft Jtest 9.6
*/
public ConstructorExampleTest() {
/*
* This constructor should not be modified. Any initialization code
* should be placed in the setUp() method instead.
*/

}

/**
* Test for method getFileLength(java.lang.String).
*
* @throws Throwable
* Tests may throw any Throwable
*
* @see ConstructorExample#getFileLength(java.lang.String)
* @author Parasoft Jtest 9.6
*
*/
@Test
public void testGetFileLength0() throws Throwable {
long result = ConstructorExample.getFileLength("Mr. Bob Smith");
assertEquals(5L, result); // jtest_unverified
// No exception thrown
// jtest_unverified
}

/**
* 当运行 testGetFileLength0 方法时指定使用的桩方法。
*
* @param method
* 被调用的方法或构造方法
* @param _this
* 对应于此方法的对象实例或者 <code>null</code> 对应静态方法
* @param args
* 传递给该方法的参数
* @return 使用的桩方法的桩返回值或者 <code>Stubs.NO_STUB_GENERATED</code> 指定不应该被打桩的方法调用。
* @throws Throwable
* 桩方法可以抛出的任何异常
* @author Parasoft Jtest 9.6
* @throws FileNotFoundException
*/
public Object stubsGetFileLength0(Member method, Object _this, Object[] args) throws FileNotFoundException{
Class [] argument_types;
if(Stubs.matches(method,RandomAccessFile.class)){

argument_types = new Class[]{String.class, String.class};
if(Stubs.matches(method, argument_types)){
//return new RandomAccessFile("C:\\Case\\test.xml", "rw");
return Stubs.makeStubObject(RandomAccessFile.class);
}
/* argument_types = new Class[]{}; // the first way to stub length
if(Stubs.matches(method, "length", argument_types))
return new Long(5L);*/
//return Stubs.NO_STUB_GENERATED;

}
if(Stubs.matches(method, "length")) // the second way to stub length
return new Long(5L);

return Stubs.NO_STUB_GENERATED;

}

/**
* Used to set up the test. This method is called by JUnit before each of
* the tests are executed.
*
* @author Parasoft Jtest 9.6
*/
@Before
public void setUp() throws Exception {
/*
* Add any necessary initialization code here (e.g., open a socket).
* Call Repository.putTemporary() to provide initialized instances of
* objects to be used when testing.
*/
super.setUp();
// jtest.Repository.putTemporary("name", object);

}

/**
* Used to clean up after the test. This method is called by JUnit after
* each of the tests have been completed.
*
* @author Parasoft Jtest 9.6
*/
@After
public void tearDown() throws Exception {
try {
/*
* Add any necessary cleanup code here (e.g., close a socket).
*/
} finally {
super.tearDown();
}
}

/**
* Utility main method. Runs the test cases defined in this test class.
*
* Usage: java ConstructorExampleTest
*
* @param args
* command line arguments are not needed
* @author Parasoft Jtest 9.6
*/
public static void main(String[] args) {
// junit.textui.TestRunner will print the test results to stdout.

org.junit.runner.JUnitCore.main("com.parasoftchina.jteststub.ConstructorExampleTest");
}

/**
* Get the class object of the class which will be tested.
*
* @return the class which will be tested
* @author Parasoft Jtest 9.6
*/
public Class getTestedClass() {
return ConstructorExample.class;
}
}
// JTEST_CURRENT_ID=-1375974269.