[標題]:[原]深入JUnit4.x
[時間]:2009-7-5
[摘要]:JUnit4.x參數化測試、私有方法測試、測試套件
[關鍵字]:JUnit、Test、測試、單元測試、addTest not applicable、suite、套件、參數化測試、私有方法、private、反射、斷言
[環境]:JUnit4.5、MyEclipse7
[作者]:Winty (wintys@gmail.com) http://www.tkk7.com/wintys
[正文]:
測試目標類:
Calculator.java:
package wintys.junit;
/**
*
* @author Winty (wintys@gmail.com) http://www.tkk7.com/wintys/
* @version 2009-07-05
*/
public class Calculator {
/**
* 加法
* @param a
* @param b
* @return a與b的和
*/
public int add(int a , int b){
return a + b;
}
/**
* 減法，訪問權限設為private
* @param a
* @param b
* @return a與b的差
*/
private int sub(int a , int b){
return a - b;
}
}
簡單測試
CalculatorTest.java:
package wintys.junit;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.Test;
public class CalculatorTest {
Calculator cal;
@Before
public void setUp() throws Exception {
cal = new Calculator();
}
@Test
public void testAdd(){
int result = cal.add(1, 1);
Assert.assertEquals(2 , result);
}
}
參數化測試CalculatorTestWithParameter.java:
package wintys.junit;
import java.util.Arrays;
import java.util.Collection;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
/**
* JUnit4參數化測試
* @author Winty (wintys@gmail.com) http://www.tkk7.com/wintys/
* @version 2009-07-05
*/
@RunWith(Parameterized.class)
public class CalculatorTestWithParameter {
private int input1;
private int input2;
private int result;
public CalculatorTestWithParameter(int input1, int input2, int result) {
super();
this.input1 = input1;
this.input2 = input2;
this.result = result;
}
@Parameters
public static Collection<Object[]> initParam(){
Object[][] objArray = new Object[][]{
{1 , 1 , 2},
{2 , 5 , 7},
{-1 , 8 , 7},
{-5 , -1 ,-6}
};
return Arrays.asList(objArray);
}
@Test
public void testAdd(){
Calculator cal = new Calculator();
int rt = cal.add(input1, input2);
assertEquals(result , rt);
}
}
測試私有方法CalculatorTestOfPrivate.java:
package wintys.junit;
import java.lang.reflect.Method;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.Test;
/**
* JUnit4測試private方法
* @author Winty (wintys@gmail.com) http://www.tkk7.com/wintys/
* @version 2009-07-05
*/
public class CalculatorTestOfPrivate {
Calculator cal;
@Before
public void setUp() throws Exception {
cal = new Calculator();
}
@Test
public void testPrivateMethod(){
Class<Calculator> cls = Calculator.class;
Method method = null;
Object result = 0 ;
try {
method = cls.getDeclaredMethod("sub", new Class<?>[]{int.class,int.class});
method.setAccessible(true);
result = (Object)method.invoke(cal, 1 , 2);
Assert.assertEquals(-1, result);
} catch (Exception e) {
e.printStackTrace();
Assert.fail();
}
}
}
建立測試套件AllTests.java:
package wintys.junit;
import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import org.junit.runners.Suite.SuiteClasses;
/**
* JUnit4 Test Suite Style
* @author Winty (wintys@gmail.com) http://www.tkk7.com/wintys/
* @version 2009-07-04
*/
//表示這個類是一個測試套件
@RunWith(Suite.class)
//說明這個測試套件所包含的測試類
@SuiteClasses({
SubscriptionTest.class,
CalculatorTest.class,
CalculatorTestWithParameter.class,
CalculatorTestOfPrivate.class
})
public class AllTests {
//在JUnit4.x中，套件類的內容一般留空，只作為以上Annotation的持有者
// the class remains completely empty,
// being used only as a holder for the above annotations
}
附錄:
JUnit3.8.x測試套件語法:
package test;
import test.gg.ba.util.UtilityTest;
import junit.framework.Test;
import junit.framework.TestSuite;
public class MyTests {
public static Test suite() {
TestSuite suite = new TestSuite("Test for test");
//$JUnit-BEGIN$
suite.addTest(test.gg.ba.util.UtilityTest.class);
//$JUnit-END$
return suite;
}
}
在JUnit4中運行JUnit3.8.x的測試套件，
Runner for use with JUnit 3.8.x-style:
@RunWith(AllTests.class)
public class ProductTests {
public static junit.framework.Test suite() {
...
}
}
[參考資料]:
[1] Test suites using annotations : http://radio.javaranch.com/lasse/2006/07/27/1154024535662.html
[2] JUnit 4 Test Suite - addTest not applicable : http://www.velocityreviews.com/forums/t636846-junit-4-test-suite-addtest-not-applicable.html
[附件]:
源程序:
http://www.tkk7.com/Files/wintys/junit_test.zip
原創作品，轉載請注明出處。
作者:Winty (wintys@gmail.com)
博客:http://www.tkk7.com/wintys
posted on 2009-07-08 10:28
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