import Convolver from "Tone/effect/Convolver";
import Basic from "helper/Basic";
import EffectTests from "helper/EffectTests";
import Buffer from "Tone/core/Buffer";

if (window.__karma__){
	Buffer.baseUrl = "/base/test/";
}

describe("Convolver", function(){

	Basic(Convolver);

	var ir = new Buffer();

	var testFile = "./audio/sineStereo.wav";

	before(function(done){
		ir.load(testFile, function(){
			done();
		});
	});

	// the buffers are set to 44.1 Khz, but i always get this error:
	// Error: Failed to set the 'buffer' property on 'ConvolverNode': The buffer sample rate of 48000 does not match the context rate of 44100 Hz.
	// EffectTests(Convolver, ir);

	context("API", function(){

		it("can pass in options in the constructor", function(){
			var convolver = new Convolver({
				"url" : testFile,
				"normalize" : false
			});
			expect(convolver.normalize).to.be.false;
			convolver.dispose();
		});

		it("can get set normalize", function(){
			var convolver = new Convolver();
			convolver.normalize = false;
			expect(convolver.normalize).to.be.false;
			convolver.dispose();
		});

		it("invokes the onload function when loaded", function(done){
			var convolver = new Convolver({
				"url" : testFile,
				"onload" : function(){
					convolver.dispose();
					done();
				}
			});
		});

		it("load returns a Promise", function(done){
			var convolver = new Convolver();
			convolver.load(testFile).then(function(){
				convolver.dispose();
				done();
			});
		});

		it("load invokes the second callback", function(done){
			var convolver = new Convolver();
			convolver.load(testFile, function(){
				convolver.dispose();
				done();
			});
		});

		it("can assign the buffer twice", function(){
			var convolver = new Convolver(ir);
			convolver.buffer = ir;
			convolver.dispose();
		});

		it("can be constructed with a buffer", function(){
			var convolver = new Convolver(ir);
			expect(convolver.buffer.get()).to.equal(ir.get());
			convolver.dispose();
		});

		it("can be constructed with loaded buffer", function(done){
			var buffer = new Buffer({
				"url" : testFile,
				"onload" : function(){
					var convolver = new Convolver(buffer);
					expect(convolver.buffer).is.not.null;
					buffer.dispose();
					convolver.dispose();
					done();
				}
			});
		});

		it("can be constructed with unloaded buffer", function(done){
			var convolver = new Convolver({
				"url" : new Buffer({
					"url" : testFile,
					"onload" : function(){
						expect(convolver.buffer).is.not.null;
						convolver.dispose();
						done();
					}
				})
			});
			//is null before then
			expect(convolver.buffer).to.be.null;
		});
	});
});