我在将以下设置的单元测试编写为jira.js文件(在node.js模块中)时遇到问题：
var rest = require('restler'); // https://www.npmjs.com/package/restler
module.exports = function (conf) {
var exported = {};
exported.getIssue = function (issueId,done) {
...
rest.get(uri).on('complete',function(data,response) {
...
};
return exported;
};
现在,我想为我的getIssue函数编写单元测试. ‘restler’是一个REST客户端,通过它我可以通过我的代码对JIRA API进行REST调用以获取JIRA问题.
因此,为了能够测试createIssue(..),我希望能够在我的Jasmine单元测试中模拟’rest’var.
我该如何模仿这种方法？请给我一些指示,以便我可以继续.我尝试过使用重新布线但是我失败了.
这是我到目前为止无法正常工作(即getIssue方法未定义)：
var rewire = require("rewire");
var EventEmitter = require('events').EventEmitter;
var emitter = new EventEmitter();
var cfg = require("../../../config.js").Configuration;
var jiraModule = rewire("../lib/jira")(cfg);
var sinon = require("sinon");
var should = require("should");
// https://github.com/danwrong/restler
var restMock = {
init : function () {
console.log('mock initiated'+JSON.stringify(this));
},postJson : function (url,data,options) {
console.log('[restler] POST url='+url+',data= '+JSON.stringify(data)+
'options='+JSON.stringify(options));
emitter.once('name_of_event',function(data){
console.log('EVent received!'+data);
});
emitter.emit('name_of_event',"test");
emitter.emit('name_of_event');
emitter.emit('name_of_event');
},get : function (url,options) {
console.log('[restler] GET url='+url+'options='+JSON.stringify(options));
},del : function (url,options) {
console.log('[restler] DELETE url='+url+'options='+JSON.stringify(options));
},putJson : function (url,options) {
console.log('[restler] PUT url='+url+',data= '+JSON.stringify(data)+
'options='+JSON.stringify(options));
}
};
var cfgMock = {
"test" : "testing"
};
jiraModule.__set__("rest",restMock);
jiraModule.__set__("cfg",cfgMock);
console.log('mod='+JSON.stringify(jiraModule.__get__("rest")));
describe("A suite",function() {
it("contains spec with an expectation",function() {
restMock.init();
restMock.postJson(null,null,null);
console.log(cfg.jira);
// the following method turns out to be undefined but when i console.log out the jiraModule,i see the entire code outputted from that file
jiraModule.getIssue("SRMAPP-130",function (err,result) {
console.log('data= '+JSON.stringify(result));
});
expect(true).toBe(true);
});
});
如果有人可以指导我如何模仿’休息’需要依赖&单元测试这个方法会非常有帮助.
另外,我应该如何模拟传递给module.exports的’conf’？
谢谢
解决方法
您可以使用
proxyquire或
mockery来存根/模拟依赖项.
在下面的例子中我使用了proxyquire.希望它有所帮助.
/* ./src/index.js */
var rest = require('restler');
module.exports = function (conf) {
var exported = {};
exported.getIssue = function (issueId,done) {
var uri = '';
var reqObj = '';
var service = {
auth : ''
};
rest.postJson(uri,reqObj,service.auth).on('complete',response) {
done(data,response);
});
};
return exported;
};
/* ./test/index.js */
var proxyquire = require('proxyquire');
var assert = require('chai').assert;
var restlerStub = {
postJson: function() {
return {
on: function(event,callback) {
callback('data','response');
}
}
}
}
var index = proxyquire('../src/index',{'restler': restlerStub})();
describe('index',function() {
it('should return the desired issue',function(done) {
var issue = index.getIssue('issueId',response) {
assert.equal(data,'data');
assert.equal(response,'response');
done();
})
});
});
/* ./package.json */
{
"scripts": {
"test": "mocha"
},"dependencies": {
"restler": "^3.4.0"
},"devDependencies": {
"chai": "^3.4.1","mocha": "^2.3.4","proxyquire": "^1.7.3"
}
}
