个人项目：JUnit的使用

由于实在不会使用C语言的单元测试工具CUnit，因此自己又学习了JUnit的使用，并建立了一个小项目，实战了一下。

GitHub：https://github.com/Max577769190/test/tree/master/Work_2

• 一个简单的测试用例：

import static org.junit.Assert.*;

import org.junit.Test;

public class FirstDayAtSchoolTest {

    FirstDayAtSchool school = new FirstDayAtSchool();
    String[] bag1 = { "Books", "Notebooks", "Pens" };
    String[] bag2 = { "Books", "Notebooks", "Pens", "Pencils" };

    @Test
    public void testPrepareMyBag() {
        System.out.println("Inside testPrepareMyBag()");
        assertArrayEquals(bag1, school.prepareMyBag());
    }

    @Test
    public void testAddPencils() {
        System.out.println("Inside testAddPencils()");
        assertArrayEquals(bag2, school.addPencils());
    }

}

测试运行结果

• 创建测试套件：如果你有很多的测试类，想一起运行测试类。当一个类被注释为@runwith，JUnit会调用指定的类来运行测试，而不是使用默认的测试类

PrepareMyBagTest.java

import org.junit.Test;
import static org.junit.Assert.*;

public class PrepareMyBagTest {

    FirstDayAtSchool school = new FirstDayAtSchool();

    String[] bag = { "Books", "Notebooks", "Pens" };

    @Test
    public void testPrepareMyBag() {

        System.out.println("Inside testPrepareMyBag()");
        assertArrayEquals(bag, school.prepareMyBag());

    }

}

AddPencilsTest.java

import org.junit.Test;
import static org.junit.Assert.*;

public class AddPencilsTest {

    FirstDayAtSchool school = new FirstDayAtSchool();

    String[] bag = { "Books", "Notebooks", "Pens", "Pencils" };

    @Test
    public void testAddPencils() {

        System.out.println("Inside testAddPencils()");
        assertArrayEquals(bag, school.addPencils());

    }

}

使用套件测试，RunWith.java

import org.junit.runner.RunWith;
import org.junit.runners.Suite;

@RunWith(Suite.class)
@Suite.SuiteClasses({ PrepareMyBagTest.class, AddPencilsTest.class })
public class SuiteTest {

}

测试运行结果

• 创建参数化测试
  • 该类注释了@RunWith（Paramterized.java）@RunWIth注释使JUnit来调用类中的标签来运行测试，而不是使用JUnit默认执行类。Parameterized是JUnit一个执行类，可以根据不同的输入运行相同的测试用例。
  • 有一个构造函数存储数据
  • 有一个静态方法Paramaterzie，生成并返回测试数据
  • 需要一个测试方法，注释@test

Calculate.java

public class Calculate {

    public int sum(int var1, int var2) {
        System.out.println("Adding values: " + var1 + " + " + var2);
        return var1 + var2;
    }

}

CalculateTest.java

import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.Collection;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class CalculateTest {

    private int expected;
    private int first;
    private int second;

    public CalculateTest(int expectedResult, int firstNumber, int secondNumber) {
        this.expected = expectedResult;
        this.first = firstNumber;
        this.second = secondNumber;
    }

    @Parameters
    public static Collection addedNumbers() {
        return Arrays.asList(new Integer[][] { { 3, 1, 2 }, { 5, 2, 3 },
                { 7, 3, 4 }, { 9, 4, 5 }, });
    }

    @Test
    public void sum() {
        Calculate add = new Calculate();
        System.out.println("Addition with parameters : " + first + " and "
                + second);
        assertEquals(expected, add.sum(first, second));
    }
}

测试运行结果