Added testAPI and canvasAPI

test/testAPI.js

@@ -0,0 +1,25 @@
+const testAPI = function(){
+	"use strict";
+	
+	function bufferToString(hash){
+		const chunks = [];
+		(new Uint32Array(hash)).forEach(function(num){
+			chunks.push(num.toString(16));
+		});
+		return chunks.map(function(chunk){
+			return "0".repeat(8 - chunk.length) + chunk;
+		}).join("");
+	}
+	
+	
+	
+	return {
+		hash: async function(input){
+			const buffer = ((typeof input) === "string")?
+				new TextEncoder("utf-8").encode(input):
+				input;
+			const hash = await crypto.subtle.digest("SHA-256", buffer);
+			return bufferToString(hash);
+		}
+	};
+}();