软件测试实验一——使用Junit和Eclemma

• Install Junit and Eclemma

　　1.Junit and Hamcrest

 

　　First download the junit-4.12.jar and hamcrest-all-1.3.jar and so on from https://github.com/junit-team/junit4/wiki/Download-and-Install.

　　Then add them to Java Build Path of your project:click project->properties->Java Build Path->Liraries->Add External JARs->choose your jars.

 

　　2.Eclemma

　　Download the eclemma.zip and unpack it.

　　In Eclipse, click Help->Install New Software->add...->choose your eclemma folder->OK->choose eclemma->finish->Reboot the eclipse.

　　After installing it, you can see a new button in your eclipse like this:

• Using Junit and Eclemma to test Triangle program

　　1.Create Triangle.java

package st.lab1;

public class Triangle {
	
	private int a,b,c;
	
	public Triangle(int a, int b, int c)
	{
		this.a = a;
		this.b = b;
		this.c = c;
	}
	
	public String triangle()
	{
		if(a + b <= c || b + c <= a || a + c <= b || a <= 0 || b <= 0 || c <= 0)
			return "not a triangle";
		if((a == b)&&(b == c))
			return "equilateral";
		else if((a != b)&&(b != c)&&(a != c))
			return "scalene";
		else
			return "isosceles";	
	}
}

 　　2.Create Junit test case class:

package st.lab1;

import static org.junit.Assert.*;

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

import java.util.Arrays;
import java.util.Collection;

@RunWith(Parameterized.class)
public class TriangleTest {
    
    private int a;
    private int b;
    private int c;
    private String result;
    private static int count = 1;
    private Triangle tri;
    
    public TriangleTest(int a, int b, int c, String result)
    {
        this.a = a;
        this.b = b;
        this.c = c;
        this.result = result;
    }
    
    @Parameters
    public static Collection data()
    {
        return Arrays.asList(new Object[][]{
            {1, 1, 2, "not a triangle"},
            {1, 1, 1, "equilateral"},
            {2, 2, 3, "isosceles"},
            {3, 4, 5, "scalene"}
        });
    }

    @Before
    public void setUp() throws Exception 
    {
        System.out.println("Create a triangle " + count);
        tri = new Triangle(a, b, c);
    }

    @Test
    public void test() {
        System.out.println("Processing test" + count);
        assertEquals(result, tri.triangle());
    }
    
    @After
    public void tearDown() throws Exception
    {
        count++;
        System.out.println("test " + (count - 1) + " have finished!");
    }
    

}

　　Here I used RunWith(Parameterized.class) to do some test at the same time.The result is like this:

• Another method to finish this testing

　　I also used RunWith(Suite.class) to finish this task.But this is simply for practice using Junit,It may make this test more difficult.

　　I create three classes corresponding to three kinds of triangle and the Junit test Classes.

　　Finally,I used a SuiteTest class to test these three class at the same time.

Source Code:

package st.lab1;

public class IsoscelesTriangle {
    
    private int a,b,c;
    
    public IsoscelesTriangle(int a, int b, int c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
    }
    
    public String triangle()
    {
        if(a + b <= c || b + c <= a || a + c <= b || a <= 0 || b <= 0 || c <= 0)
            return "not a triangle";
        if((a == b && b != c)||(a == c && b != c)||(b == c && a != b))
            return "isosceles";
        else return "not isosceles";
    }
}

package st.lab1;

public class ScaleneTriangle {
    
    private int a,b,c;
    
    public ScaleneTriangle(int a, int b, int c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
    }
    
    public String triangle()
    {
        if(a + b <= c || b + c <= a || a + c <= b || a <= 0 || b <= 0 || c <= 0)
            return "not a triangle";
        if(a != b && b != c && a != c)
            return "scalene";
        else return "not scalene";
    }
}

package st.lab1;

public class EquilateralTriangle {
    
    private int a,b,c;
    
    public EquilateralTriangle(int a, int b, int c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
    }
    
    public String triangle()
    {
        if(a + b <= c || b + c <= a || a + c <= b || a <= 0 || b <= 0 || c <= 0)
            return "not a triangle";
        if((a == b)&&(b == c))
            return "equilateral";
        else
            return "not equilateral";
    }
}

package st.lab1;

import static org.junit.Assert.*;

import java.util.Arrays;
import java.util.Collection;

import org.junit.After;
import org.junit.Before;
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 IsoscelesTriangleTest {

    private int a;
    private int b;
    private int c;
    private String result;
    private static int count = 1;
    private IsoscelesTriangle tri;
    
    public IsoscelesTriangleTest(int a, int b, int c, String result)
    {
        this.a = a;
        this.b = b;
        this.c = c;
        this.result = result;
    }
    
    @Parameters
    public static Collection data()
    {
        return Arrays.asList(new Object[][]{
            {5, 1, 2, "not a triangle"},
            {2, 3, 3, "isosceles"},
            {2, 2, 2, "not isosceles"},
        });
    }

    @Before
    public void setUp() throws Exception 
    {
        System.out.println("Create a isosceles triangle " + count);
        tri = new IsoscelesTriangle(a, b, c);
    }

    @Test
    public void test() {
        System.out.println("Processing isosceles test" + count);
        assertEquals(result, tri.triangle());
    }
    
    @After
    public void tearDown() throws Exception
    {
        count++;
        System.out.println("isosceles test " + (count - 1) + " have finished!");
    }
}

package st.lab1;

import static org.junit.Assert.*;

import java.util.Arrays;
import java.util.Collection;

import org.junit.After;
import org.junit.Before;
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 ScaleneTriangleTest {

    private int a;
    private int b;
    private int c;
    private String result;
    private static int count = 1;
    private ScaleneTriangle tri;
    
    public ScaleneTriangleTest(int a, int b, int c, String result)
    {
        this.a = a;
        this.b = b;
        this.c = c;
        this.result = result;
    }
    
    @Parameters
    public static Collection data()
    {
        return Arrays.asList(new Object[][]{
            {5, 1, 2, "not a triangle"},
            {2, 3, 4, "scalene"},
            {2, 2, 2, "not scalene"},
        });
    }

    @Before
    public void setUp() throws Exception 
    {
        System.out.println("Create a scalene triangle " + count);
        tri = new ScaleneTriangle(a, b, c);
    }

    @Test
    public void test() {
        System.out.println("Processing scalene test" + count);
        assertEquals(result, tri.triangle());
    }
    
    @After
    public void tearDown() throws Exception
    {
        count++;
        System.out.println("scalene test " + (count - 1) + " have finished!");
    }
}

package st.lab1;

import static org.junit.Assert.*;

import java.util.Arrays;
import java.util.Collection;

import org.junit.After;
import org.junit.Before;
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 EquilateralTriangleTest {

    private int a;
    private int b;
    private int c;
    private String result;
    private static int count = 1;
    private EquilateralTriangle tri;
    
    public EquilateralTriangleTest(int a, int b, int c, String result)
    {
        this.a = a;
        this.b = b;
        this.c = c;
        this.result = result;
    }
    
    @Parameters
    public static Collection data()
    {
        return Arrays.asList(new Object[][]{
            {1, 1, 2, "not a triangle"},
            {1, 1, 1, "equilateral"},
            {2, 2, 3, "not equilateral"},
        });
    }

    @Before
    public void setUp() throws Exception 
    {
        System.out.println("Create a equalateral triangle " + count);
        tri = new EquilateralTriangle(a, b, c);
    }

    @Test
    public void test() {
        System.out.println("Processing equalateral test" + count);
        assertEquals(result, tri.triangle());
    }
    
    @After
    public void tearDown() throws Exception
    {
        count++;
        System.out.println("equalateral test " + (count - 1) + " have finished!");
    }

}

package st.lab1;

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

@RunWith(Suite.class)
@Suite.SuiteClasses({
    EquilateralTriangleTest.class,
    IsoscelesTriangleTest.class,
    ScaleneTriangleTest.class,
    
})
public class SuiteTest {

}

Result:

　　

　　　　We can see that all the three classes that hope to be tested have been 100% covered.