[英]Karma: Can't find variable: exports
I've written a node module which can be used for both the backend and client 我写了一个节点模块,可以用于后端和客户端
(exports || window).Bar= (function () {
return function () { .... }
})();
Now my karma tests use PhantomJs and complain about the not existing exports
variable 现在我的业力测试使用PhantomJs并抱怨不存在的
exports
变量
gulp.task('test', function () {
var karma = require('karma').server;
karma.start({
autoWatch: false,
browsers: [
'PhantomJS'
],
coverageReporter: {
type: 'lcovonly'
},
frameworks: [
'jasmine'
],
files: [
'bar.js',
'tests/bar.spec.js'
],
junitReporter: {
outputFile: 'target/junit.xml'
},
preprocessors: {
'app/js/!(lib)/**/*.js': 'coverage'
},
reporters: [
'progress',
'junit',
'coverage'
],
singleRun: true
});
});
The error I get is 我得到的错误是
PhantomJS 1.9.7 (Mac OS X) ERROR
ReferenceError: Can't find variable: exports
Is there a way to ignore the exports variable in karam/phantomsJs ? 有没有办法忽略karam / phantomsJs中的exports变量?
A common pattern is usually to check whether the exports
variable is defined: 常见的模式通常是检查是否定义了
exports
变量:
(function(){
...
var Bar;
if (typeof exports !== 'undefined') {
Bar = exports;
} else {
Bar = window.Bar = {};
}
})();
This pattern is used in Backbone as example - well, it's technically bit more complicated in the source code because it does support also AMD, but the idea it's this. 这种模式在Backbone中用作示例 - 嗯,它在源代码中技术上有点复杂,因为它确实支持AMD,但这就是它的想法。
You can also push down the check passing it as first argument of the wrapping function: 你也可以按下检查传递它作为包装函数的第一个参数:
(function(exports){
// your code goes here
exports.Bar = function(){
...
};
})(typeof exports === 'undefined'? this['mymodule']={}: exports);
Have a look at this blog post for more info. 有关详细信息,请查看此博客文章 。
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