nodeerrors/test/unit/onError.spec.js at master · ebdrup/nodeerrors · GitHub

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"use strict";
describe("specifying onError", function () {
	require("../../lib/nodeerrors");
	it("calls the callback if there is no error", function () {
		var data = {mytest:true};
		function myFunction(callback){
			return callback(null, data);
		}
		var errorHandlerSpy = sinon.spy();
		var callbackSpy = sinon.spy();

		myFunction(callbackSpy.onError(errorHandlerSpy));

		expect(errorHandlerSpy).not.to.be.called;
		expect(callbackSpy).to.be.calledWith(null, data);
		expect(callbackSpy).to.be.calledOnce;

	});
	it("calls the error handler if an error is passed", function () {
		var error = new Error("test");
		function myFunction(callback){
			return callback(error);
		}
		var errorHandlerSpy = sinon.spy();
		var callbackSpy = sinon.spy();

		myFunction(callbackSpy.onError(errorHandlerSpy));

		expect(callbackSpy).not.to.be.called;
		expect(errorHandlerSpy).to.be.calledWith(error);
		expect(errorHandlerSpy).to.be.calledOnce;

	});
	it("calls the error handler if an error is thrown in the handler", function () {
		var error = new Error("test");
		function myFunction(callback){
			throw error;
		}
		var errorHandlerSpy = sinon.spy();

		myFunction.onError(errorHandlerSpy)();

		expect(errorHandlerSpy).to.be.calledWith(error);
		expect(errorHandlerSpy).to.be.calledOnce;

	});
});