JUnit unit Test-parametric testing

The junit4.x version needs to introduce the following jar packages:

Hamcrest-core-1.3.jar

Junit-4.12-beta-3.jar

Create a new Calculator class, as follows:

 Packagecom.pt; Public classCalculate {/*** addition *@paramD1 *@paramD2 *@return     */     Public Static DoubleAddDoubleD1,DoubleD2) {        returnD1 +D2; }        /*** Subtraction *@paramD1 *@paramD2 *@return     */     Public Static DoubleDiffDoubleD1,DoubleD2) {        returnD1-D2; }        /*** Multiplication *@paramD1 *@paramD2 *@return     */     Public Static DoubleMutiDoubleD1,DoubleD2) {        returnD1 *D2; }        /*** Division *@paramD1 *@paramD2 *@return     */     Public Static DoubleDevide (DoubleD1,DoubleD2) {        returnD1/D2; }}

Calculate.java

Create a new source folder (Note: Not folder)

Create a new JUnit Test case Class (note: Not his ordinary class)

1  Packagecom.pt;2 3 4 Importjava.util.Arrays;5 Importjava.util.Collection;6 7 ImportOrg.junit.After;8 ImportOrg.junit.Before;9 Importorg.junit.Test;Ten ImportOrg.junit.runner.RunWith; One Importorg.junit.runners.Parameterized; A Importorg.junit.runners.Parameterized.Parameters; -  -@RunWith (parameterized.class)//This annotation is required when specifying runner parameterized tests the  Public classTestcalculate { -     Private Longinput1; -     Private LongInput2; -      +      -     /** + * Constructor Function A      * @paramin_1 at      * @paramin_2 -      */ -      PublicTestcalculate (LongIn_1,Longin_2) { -          This. INPUT1 =in_1; -          This. Input2 =in_2; -     } in      -@Before//each test function executes before execution of Setup cannot be static to     //@BeforeClass//only one setup must be static before testing +      Public voidsetUp () { -System.out.println ("~~~~~~~~~ before starting test"); the     } *      $@After//every Test function executes after execution teardown cannot be staticPanax Notoginseng     //@AfterClass//only once after the test is finished teardown must be static -      Public voidTearDown () { theSystem.out.println ("~~~~~~~~~ after the start of the completion"); +     } A      the     //parametric test test data + @Parameters -      Public StaticCollection Predata () { $         //must be defined as long to be an error when executing the constructor $object[][] data =Newobject[][]{{1,2},{2,3},{4,5}}; -         returnArrays.aslist (data);//Convert an array into a collection -     } the      -     Wuyi @Test the      Public voidTestadd () { -         DoubleResult_add =Calculate.add (INPUT1, input2); WuSystem.out.println ("Addesult:" +result_add); -         //asserts that if it is not the same as expected value 3, the exception is wrapped About         //assert.assertequals ("Addition calculation Error", (long) 3, (long) result_add); $SYSTEM.OUT.PRINTLN ("Test Add Method:" + input1 + "+" + input2 + "=" +result_add); -     } -      - @Test A      Public voidTestdiff () { +Calculate.diff (1, 2); theSYSTEM.OUT.PRINTLN ("Test diff method")); -     } $      the @Test the      Public voidTestmuti () { theCalculate.diff (1, 2); theSystem.out.println ("Test Muti method"); -     } in      the     //If the run time is more than 300ms, the exception is reported . the@Test (timeout=300) About      Public voidtestdevide () { the         Try{ theThread.Sleep (298); the}Catch(Exception ex) { +              -         } theCalculate.diff (1, 2);BayiSystem.out.println ("Test Devide method"); the     } the}

Testcalculate.java

OK;

Right-click Run as->junit Test

JUnit unit Test-parametric testing