Closed #2 (Make `isReady` configurable)

src/index.js

@@ -7,8 +7,8 @@ function PromisedValue(initialValue) {
 		throw new TypeError("Cannot call a class as a function");
 	}
 	
-	let initialized    = false;
-	let value          = initialValue;
+	let initialized = false;
+	let value       = initialValue;
 	
 	let resolvePromise;
 	let willBeReady = new Promise(resolve => {
@@ -17,7 +17,8 @@ function PromisedValue(initialValue) {
 	
 	Object.defineProperties(this, {
 		isReady: {
-			enumerable: true,
+			configurable: true,
+			enumerable:   true,
 			get() {
 				return initialized;
 			}
@@ -32,8 +33,12 @@ function PromisedValue(initialValue) {
 				value = newValue;
 				
 				if (!initialized) {
-					resolvePromise(value);
+					try {
+						this.isReady = true; // in case of defined setter
+					} catch (e) {/*ignore*/}
 					initialized = true;
+					
+					resolvePromise(value);
 				} else {
 					willBeReady = Promise.resolve(value);
 				}

test/test.js

@@ -3,10 +3,11 @@ const test = require('ava');
 const PV = require('../dist/index');
 
 test.cb('Promised value', t => {
-	t.plan(6);
+	t.plan(8);
 	
 	const v = new PV(42);
 	v.willBeReady.then(value => {
+		t.is(v.isReady, true);
 		t.is(value, 123);
 	});
 	
@@ -19,6 +20,7 @@ test.cb('Promised value', t => {
 	t.is(v.value, 123);
 	
 	v.willBeReady.then(value => {
+		t.is(v.isReady, true);
 		t.is(value, 123);
 		t.end();
 	});
@@ -54,3 +56,46 @@ test('Property descriptors', t => {
 	t.false(v.hasOwnProperty('value'));
 	t.true(Object.keys(v).toString() === ['isReady', 'willBeReady'].toString());
 });
+
+test.cb('isReady descriptor', t => {
+	t.plan(15);
+	
+	const v = new PV(42);
+	
+	let descriptor = Object.getOwnPropertyDescriptor(v, 'isReady');
+	t.true(descriptor.configurable);
+	
+	Object.defineProperty(v, 'isReady', {
+		configurable: true,
+		enumerable:   true,
+		get() { // 4 times
+			t.pass();
+			return descriptor.get.call(v);
+		},
+		set(newValue) { // 1 time
+			t.false(descriptor.get.call(v));
+			t.true(newValue);
+		}
+	});
+	
+	
+	v.willBeReady.then(value => {
+		t.is(v.isReady, true);
+		t.is(value, 123);
+	});
+	
+	t.is(v.isReady, false);
+	t.is(v.value, 42);
+	
+	v.value = 123;
+	
+	t.is(v.isReady, true);
+	t.is(v.value, 123);
+	
+	v.willBeReady.then(value => {
+		t.is(v.isReady, true);
+		t.is(value, 123);
+		t.end();
+	});
+	
+});