源码
Main.java
package github.hyzeta; import org.junit.runner.JUnitCore; import org.junit.runner.Result; import org.junit.runner.notification.Failure; public class Main { public static void main(String[] args) { // write your code here Result result = JUnitCore.runClasses(TriangleFunTest.class); if (result.wasSuccessful()) { System.out.println("All tests for triangle function has passed."); } else { System.out.println("Some tests for triangle function has failed."); for (Failure failure : result.getFailures()) { System.out.println(failure.toString()); } } } } |
TriangleFun.java
package github.hyzeta; enum TriangleFuncResult { EQUILATERAL, ISOSCELES, SCALENE, ERROR } public class TriangleFun { public TriangleFuncResult triangle(int a, int b, int c) { if (a <= 0 || b <= 0 || c <= 0) { return TriangleFuncResult.ERROR; } if (!(a + b > c && Math.abs(a - b) < c)) { return TriangleFuncResult.ERROR; } if (a == b && b == c) { return TriangleFuncResult.EQUILATERAL; } if (a == b || a == c || b == c) { return TriangleFuncResult.ISOSCELES; } return TriangleFuncResult.SCALENE; } } |
TriangleFunTest.java
package github.hyzeta; import org.junit.Test; import static org.junit.Assert.*; public class TriangleFunTest { @Test public void testErrorTriangle() { assertEquals(new TriangleFun().triangle(0, 0, 0), TriangleFuncResult.ERROR); assertEquals(new TriangleFun().triangle(-1, -1, -1), TriangleFuncResult.ERROR); assertEquals(new TriangleFun().triangle(-1, 2, 3), TriangleFuncResult.ERROR); assertEquals(new TriangleFun().triangle(1, 2, 3), TriangleFuncResult.ERROR); } @Test public void testEquilateralTriangle() { assertEquals(new TriangleFun().triangle(3, 3, 3), TriangleFuncResult.EQUILATERAL); assertEquals(new TriangleFun().triangle(1, 1, 1), TriangleFuncResult.EQUILATERAL); assertEquals(new TriangleFun().triangle(2, 2, 2), TriangleFuncResult.EQUILATERAL); } @Test public void testIsosceles() { assertEquals(new TriangleFun().triangle(2, 2, 3), TriangleFuncResult.ISOSCELES); assertEquals(new TriangleFun().triangle(4, 4, 5), TriangleFuncResult.ISOSCELES); assertEquals(new TriangleFun().triangle(5, 7, 7), TriangleFuncResult.ISOSCELES); } @Test public void testScalene() { assertEquals(new TriangleFun().triangle(2, 3, 4), TriangleFuncResult.SCALENE); assertEquals(new TriangleFun().triangle(3, 4, 5), TriangleFuncResult.SCALENE); assertEquals(new TriangleFun().triangle(12, 22, 26), TriangleFuncResult.SCALENE); } } |
JUnit和eclemma安装过程
直接在Maven仓库里搜索JUnit和hamcrest-core
http://search.maven.org/#search|gav|1|g:%22junit%22%20AND%20a:%22junit%22
http://search.maven.org/#search|gav|1|g:%22org.hamcrest%22%20AND%20a:%22hamcrest-core%22
下载junit-4.12.jar包和hamcrest-core-1.3.jar包
然后在IntelliJ IDEA里的Project Structure里的Libraries里添加这两个jar包
JUnit配置完成
eclemma的安装过程相同，直接将eclemma-2.3.3.zip加入到Libraries里就可以了，配置完成后如下
测试样例编写
详情请参考开头的源码，主要是编写了TriangleFun类（含有triangle函数）和TriangleFuncResult枚举类型，TriangleFuncResult枚举类型包含四个结果：
· 不是三角形：TriangleFuncResult.ERROR
· 等边：TriangleFuncResult.EQUILATERAL
· 等腰：TriangleFuncResult.ISOSCELES
· 等腰三角形：TriangleFuncResult.SCALENE
然后编写测试类型TriangleFunTest，包含四个测试函数testErrorTriangle，testEquilateralTriangle，testIsosceles，testScalene，分别测试四种结果。
最后在Main函数中主动唤起JUnit测试
Result result = JUnitCore.runClasses(TriangleFunTest.class);
然后判断是否正确，如果测试通过则汇报成功，不成功则打印所有错误信息。
if (result.wasSuccessful()) { System.out.println("All tests for triangle function has passed."); } else { System.out.println("Some tests for triangle function has failed."); for (Failure failure : result.getFailures()) { System.out.println(failure.toString()); } } |
JUnit测试结果
代码覆盖率测试
之所以Main函数有部分没有覆盖到，是因为在Main中有部分代码用于判断和输出测试中的错误信息，而这个测试样例并没有发生错误，所以这段代码是跑不到的。
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