Java is an object-oriented programming language. It not only absorbs the various advantages of the C++ language, but also eliminates the concepts of multiple inheritance and pointers that are difficult to understand in C++. Therefore, the Java language is powerful and easy to use. As a representative of static object-oriented programming languages, the Java language implements object-oriented theory very well, allowing programmers to perform complex programming in an elegant way.
Java is characterized by simplicity, object-oriented, distributed, robustness, security, platform independence and portability, multi-threading, and dynamics. Java can write desktop applications, web applications, distributed systems, and embedded system applications.
Unit test (unit tesTIng) refers to the inspection and verification of the smallest testable unit in the software. For the meaning of the unit in the unit test, in general, it is necessary to determine the specific meaning according to the actual situation, such as the unit in C language refers to a function, the unit in Java refers to a class, and the graphical software can refer to a window or a menu. Wait. In general, a unit is the smallest measured functional module that is artificially specified. Unit testing is the lowest level of testing activity to be performed during the software development process, and the individual units of the software are tested in isolation from the rest of the program.
In a traditional structured programming language, such as C, the unit to be tested is typically a function or sub-process. In an object-oriented language like C++, the basic unit to test is a class. For the Ada language, developers can choose whether to perform separate tests and functions, or unit tests at the Ada package level. The principles of unit testing are also extended to the development of fourth generation languages ​​(4GL), where the basic unit is typically divided into a menu or display interface.
Other development activities often associated with unit testing include Code review, StaTIc analysis, and Dynamic analysis. Static analysis is to study the source code of the software, find errors or collect some metric data, and do not need to compile and execute the code. Dynamic analysis provides information on execution tracking, time analysis, and test coverage by observing the actions of the software runtime.
Java unit testFirst create a java project, create a unit data class in the project, as follows:
[java] view plain copypackage com.phicomme.hu;
Public class Student
{
Private String name;
Private String sex;
Private int high;
Private int age;
Private string school;
Public Student(String name, String sex , int high, int age, String school)
{
This.name = name;
This.sex = sex;
This.high = high;
This.age = age;
This.school = school;
}
Public String getName()
{
Return name;
}
Public void setName(String name)
{
This.name = name;
}
Public String getSex()
{
Return sex;
}
Public void setSex(String sex)
{
This.sex = sex;
}
Public int getHigh()
{
Return high;
}
Public void setHigh(int high)
{
This.high = high;
}
Public int getAge()
{
Return age;
}
Public boolean setAge(int age)
{
If (age 》25)
{
Return false;
}
Else
{
This.age = age;
Return true;
}
}
Public String getSchool()
{
Return school;
}
Public void setSchool(String school)
{
This.school = school;
}
}
Test this class unit under eclipse:
First import the JUnit package: select the java project, click the right mouse button --- select "properTIes----" in the window select Java Build Path----" click Add Library----" on the right side in the pop-up window list Junit----"Next-----"Junit 4 (I use JUnit 4)----"finish
So the JUnit 4 package is finished, and the next step is to create a test class:
Put the test class and the tested class in different packages (can also be placed in the same package, here for the sake of distinction), the code is as follows:
Test class 1:
[java] view plain copypackage com.phicomme.test;
Import com.phicomme.hu.Student;
Import junit.framework.TestCase;
Public class StudentTest01 extends TestCase
{
Student testStudent;
//This method is called before each test method is executed (test case)
@Override
Protected void setUp() throws ExcepTIon
{
// TODO Auto-generated method stub
super.setUp();
testStudent = new Student("djm", "boy", 178, 24, "Huadong Political Law");
System.out.println("setUp()");
}
/ / This method is called after executing each test method
@Override
Protected void tearDown() throws Exception
{
// TODO Auto-generated method stub
super.tearDown();
System.out.println("tearDown()");
}
/ / Test the use case, test the getSex () method of the Person object
Public void testGetSex()
{
assertEquals("boy", testStudent.getSex());
System.out.println("testGetSex()");
}
/ / Test the getAge () method of the Person object
Public void testGetAge()
{
assertEquals(24, testStudent.getAge());
System.out.println("testGetAge()");
}
}
Test class 2:
[java] view plain copypackage com.phicomme.test;
Import junit.framework.TestCase;
Import com.phicomme.hu.Student;
Public class StudentTest extends TestCase
{
Private Student testStudent;
@Override
Protected void setUp() throws Exception
{
// TODO Auto-generated method stub
super.setUp();
testStudent = new Student("steven_hu", "boy", 170, 23, "Shanghai Institute of Technology");
}
@Override
Protected void tearDown() throws Exception
{
// TODO Auto-generated method stub
super.tearDown();
}
Public void testSetage()
{
assertTrue(testStudent.setAge(21));
}
Public void testGetSchool()
{
/ / Expected value is not the same as the actual value, failure occurred during the test (Failure)
assertEquals ("Nanchang University", testStudent.getSchool());
}
Public void testGetName()
{
assertEquals("hdy", testStudent.getName());
}
}
Of course, if you need to test both test classes at the same time, you can use the TestSuite class, which is equivalent to a suite, you can add all the test classes to run the test together;
code show as below:
[java] view plain copypackage com.phicomme.test;
Import com.phicomme.hu.StudentTest02;
Import junit.framework.Test;
Import junit.framework.TestSuite;
Public class AllTest
{
//static PersonTest p = new PersonTest();
//static PersonTest p1 = new PersonTest();
Public static Test suite()
{
TestSuite suite = new TestSuite("Test for com.phicomme.test");
//suite.addTest(p);
//suite.addTest(p1);
suite.addTestSuite(StudentTest.class);
suite.addTestSuite(StudentTest01.class);
Return suite;
}
}
Finally, test the above three classes separately (select the class you want to test --- right mouse button ----" Run As----"Junit Test):
Test results of the StudentTest class:
Test results of the StudentTest01 class:
Test results of the AllTest class:
The test about java is here, I hope to help everyone, there will be time to talk about the unit test about android, and on the phone to write a UI interface instead of eclipse test interface as shown above;
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