How to check for class inheritance in Coffeescript Mocha Test?

问题

How do I check for the class of an object in a mocha spec in Coffeescript?

I have tried the following:

# foo.coffee
class Foo
module.exports = new Foo()

# foo_spec.coffee
should  = require 'should'
{ Foo } = require 'foo'
foo = new Foo
foo.should.be.an.instanceOf(Foo)

However, I receive ReferenceError Foo is not defined

回答1:

I believe this to be the easiest approach:

# foo.coffee
class Foo
module.exports = new Foo()
module.exports.Foo = Foo # IMPORTANT, exports the actual class Foo


# foo_spec.coffee
should  = require 'should'
{ Foo } = require 'foo' # Requires said class Foo
foo = new Foo
foo.should.be.an.instanceOf(Foo)

来源：https://stackoverflow.com/questions/20335719/how-to-check-for-class-inheritance-in-coffeescript-mocha-test