grade-book/tests/gradeTests.js

This is code for Add grade and average grade

var book = require("../lib/grades").book;

exports["setUp"] = function(callback){
	book.reset();
	callback();
	
}
exports["Can compute letter grade of A"] = function(test){
	book.addGrade(100);
	book.addGrade(90);
	
	var result = book.getLetterGrade();
	test.equal(result,'A');
	test.done();
	
	
};

exports["Can average grades"] = function(test){
	book.addGrade(100);
	book.addGrade(50);
	var average = book.getAverage();
	test.equal(average,75);
	test.done();
	
	
};

exports["Can add new grade"] = function(test){
	book.addGrade(90);
	var count = book.getCountOfGrade();
	test.equal(count,1);
	test.done();
};