一、Junit安装
1. 安装Junit（4.12）和hamcrest（1.3）
首先从maven仓库中下载junit-4.12.jar和hamcrest-all-1.3.jar。
在Eclipse中新建一个项目，和src同级新建一个lib文件夹，将上述两个下载的jar包复制过来。
选中其中一个jar包，右键 -> Build Path -> Add to Build Path，最终的文件目录如右图。
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2. 安装Eclemma
Help -> Eclipse Marketplace -> search Eclemma -> Install
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二、Triangle 问题测试
1. Triangle.java
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package triangle;
public class Triangle {
public static boolean isTriangle(``int a, ``int b ,``int c) {
if``((a+b>c) && (a+c>b) && (b+c>a))
return true``;
else
return false``;
}
//等腰？
public static boolean isIsosceles(``int a, ``int b, ``int c)
{
if``(a == b || b == c || c == a)
return true``;
else
return false``;
}
//等边？
public static boolean isEquilateral(``int a, ``int b, ``int c)
{
if``(a==b && b==c)
return true``;
else
return false``;
}
public static void Triangle (``int a, ``int b, ``int c) {
if``(isTriangle(a,b,c))
{
if``(isIsosceles(a,b,c))
{
if``(isEquilateral(a,b,c))
{
System.out.println(``"It's an equilateral triangle!"``);
}
else
{
System.out.println(``"It's an isosceles triangle!"``);
}
}
else
{
System.out.println(``"It's a scalene triangle!"``);
}
}
else
{
System.out.println(``"It can't be a triangle!"``);
}
} ``// end Triangle
}
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2. TriangleTest.java
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package triangle;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class TriangleTest {
private Triangle tri;
@Before
public void setUp() ``throws Exception {
tri = ``new Triangle();
}
@Test
public void testIsTriangle() {
assertEquals(``"判断三角形模块异常"``,``true``,tri.isTriangle(``3``, ``4``, ``5``));
assertEquals(``"判断三角形模块异常"``,``false``,tri.isTriangle(``1``, ``1``, ``5``));
}
@Test
public void testIsEquilateral() {
assertEquals(``"判断等边三角形模块异常"``,``true``,tri.isEquilateral(``3``, ``3``, ``3``));
assertEquals(``"判断等边三角形模块异常"``,``false``,tri.isEquilateral(``2``, ``3``, ``3``));
}
@Test
public void testIsIsosceles() {
assertEquals(``"判断等腰三角形模块异常"``,``true``,tri.isIsosceles(``3``, ``3``, ``4``));
assertEquals(``"判断等腰三角形模块异常"``,``false``,tri.isIsosceles(``3``, ``2``, ``4``));
}
@Test
public void testTriangle() {
tri.Triangle(``3``, ``4``, ``5``);
tri.Triangle(``2``, ``2``, ``5``);
tri.Triangle(``2``, ``2``, ``2``);
tri.Triangle(``2``, ``2``, ``3``);
}
}
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3. 测试结果
image
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