Added test for blob, offscreen canvas and offscreen canvas in workers

test/testAPI.js

@@ -18,6 +18,54 @@ const testAPI = function(){
 	
 	
 	return {
+		runInWorker: async function(func, args = [], scripts = []){
+			return new Promise(function(resolve, reject){
+				const apis = scripts.map(function(script){
+					switch (typeof script){
+						case "function":
+							return script.toString();
+						case "string":
+						case "object":
+							return "self.importScripts(" + JSON.stringify(script.toString()) + ")";
+						default:
+							return "";
+					}
+				}).join(";\n");
+				const code = `${apis};
+				${func.toString()}
+				async function run(){
+					return ${func.name}(${args.map(JSON.stringify).join(", ")});
+				}
+				run().then(function(result){
+					self.postMessage({result});
+				}).catch(function(error){
+					console.log(error);
+					self.postMessage({error: error.message || error.toString()});
+				});`;
+				const blob = new Blob([code], {type: "text/javascript"});
+				
+				const blobWorker = new Worker(URL.createObjectURL(blob), {name: "BlobWorker"});
+				blobWorker.addEventListener("message", function(event){
+					if (event.data.error){
+						reject(event.data.error);
+					}
+					else {
+						resolve(event.data.result);
+					}
+					blobWorker.terminate();
+				});
+			});
+		},
+		readBlob: async function(blob){
+			const reader = new FileReader();
+			return new Promise(function(resolve, reject){
+				reader.addEventListener("error", reject);
+				reader.addEventListener("load", function(){
+					resolve(reader.result);
+				});
+				reader.readAsDataURL(blob);
+			});
+		},
 		hash: async function(input){
 			const buffer = ((typeof input) === "string")?
 				new TextEncoder("utf-8").encode(input):