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mocha-async-demo.js
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mocha-async-demo.js
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/**
* @fileOverView mocha-async-demo
* @author zhangmeng on 15/10/12
*/
//使用异步callback的方式
var fs = require('fs');
var fileName = '/opt/local/share/nginx/html/my-git/f2e-testing/basic/files/name.json';
var chai = require('chai');
var expect = chai.expect;
var Q = require('q');
//使用回调的方式测试
describe('file content validation through callback', function () {
//读取文件内容
var fileObj = {};
before(function (done) {
//async
fs.readFile(fileName, 'utf-8', function (err, data) {
if (err) {
throw err;
}
fileObj = JSON.parse(data);
done();
});
});
it ('expect name to be zhangmeng', function () {
var name = fileObj.name;
expect(name).to.equal("zhangmeng");
});
it ('expect name to be zhangmeng', function () {
var age = fileObj.age;
expect(age).to.equal('29');
});
});
//使用promise的方式例子
describe('file content validation through promise', function () {
var fileObj = {};
var readFilePromise = function(path, encoding) {
var encoding = encoding || 'utf-8';
var deferred = Q.defer();
fs.readFile(path, encoding, function(err, text) {
if(err) {
deferred.reject(new Error(err));
} else {
deferred.resolve(text);
}
});
return deferred.promise;
};
before('read name.json', function () {
//return 支持promise的异步
return readFilePromise(fileName).then(function(data) {
try {
fileObj = JSON.parse(data);
} catch(err) {
console.log(err);
}
})
});
it ('name should be zhangmeng', function () {
var name = fileObj.name;
expect(name).to.equal('zhangmeng');
});
it ('age should be 29', function () {
var age = fileObj.age;
expect(age).to.equal('29');
});
});