利用should.js进行测试

nodejs 环境 ， 安装should.js包 （npm install should）

var should = require('should');

//正确1， 错误0   100
precentNum2(1,0).should.eql(100);
//正确0， 错误1   0
precentNum2(0,1).should.eql(0);
//正确0， 错误0  －－ 
precentNum2(0,0).should.eql('- -');
//正确1， 错误1  50
precentNum2(1,1).should.eql(50);
//正确1， 错误3  25 
precentNum2(1,3).should.eql(25);
//正确1， 错误2  33
precentNum2(1,2).should.eql(33);
//正确1， 错误2  33
precentNum2(1,4).should.eql(33);



function precentNum2(num, num2) {
    var correctQuestions = parseInt(num);
    var wrongQuestions = parseInt(num2);

    if((correctQuestions + wrongQuestions) === 0) {
        return  "- -";
    } else if(correctQuestions === (correctQuestions + wrongQuestions)) {
        return 100;
    } else if(correctQuestions === 0 && wrongQuestions !== 0) {
        return 0;
    } else {
        var temp = correctQuestions / (correctQuestions + wrongQuestions);
        var tempResult = parseInt(temp.toFixed(2).substr(2,2));
        if(tempResult > 0 && tempResult < 101) {
            return tempResult;
        } else {
            return "- -";
        }
    }
}

mocha + should  (npm install  -g mocha)

var should = require('should');
describe('Precent', function(){
    describe('Precent Test', function(){
          it('Test precentNum2', function(){
            //正确1， 错误0   100
            precentNum2(1,0).should.eql(100);
            //正确0， 错误1   0
            precentNum2(0,1).should.eql(0);
            //正确0， 错误0  －－ 
            precentNum2(0,0).should.eql('- -');
            //正确1， 错误1  50
            precentNum2(1,1).should.eql(50);
            //正确1， 错误3  25 
            precentNum2(1,3).should.eql(25);
            //正确1， 错误2  33
            precentNum2(1,2).should.eql(33);
            //正确1， 错误2  33
            precentNum2(1,4).should.eql(20);
        })
    })
});

function precentNum2(num, num2) {
    var correctQuestions = parseInt(num);
    var wrongQuestions = parseInt(num2);

    if((correctQuestions + wrongQuestions) === 0) {
        return  "- -";
    } else if(correctQuestions === (correctQuestions + wrongQuestions)) {
        return 100;
    } else if(correctQuestions === 0 && wrongQuestions !== 0) {
        return 0;
    } else {
        var temp = correctQuestions / (correctQuestions + wrongQuestions);
        var tempResult = parseInt(temp.toFixed(2).substr(2,2));
        if(tempResult > 0 && tempResult < 101) {
            return tempResult;
        } else {
            return "- -";
        }
    }
}