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Unified Diff: test/mjsunit/harmony/computed-property-names-classes.js

Issue 792233008: ES6 computed property names (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years ago
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Index: test/mjsunit/harmony/computed-property-names-classes.js
diff --git a/test/mjsunit/harmony/computed-property-names-classes.js b/test/mjsunit/harmony/computed-property-names-classes.js
new file mode 100644
index 0000000000000000000000000000000000000000..bcd031811e3523f784a841e622bb654868ac8acc
--- /dev/null
+++ b/test/mjsunit/harmony/computed-property-names-classes.js
@@ -0,0 +1,367 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+// Flags: --harmony-computed-property-names --harmony-classes
+
+
+function ID(x) {
+ return x;
+}
+
+
+(function TestClassMethodString() {
+ class C {
+ a() { return 'A'}
+ ['b']() { return 'B'; }
+ c() { return 'C'; }
+ [ID('d')]() { return 'D'; }
+ }
+ assertEquals('A', new C().a());
+ assertEquals('B', new C().b());
+ assertEquals('C', new C().c());
+ assertEquals('D', new C().d());
+ assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(C.prototype));
+})();
+
+
+(function TestClassMethodNumber() {
+ class C {
+ a() { return 'A'; }
+ [1]() { return 'B'; }
+ c() { return 'C'; }
+ [ID(2)]() { return 'D'; }
+ }
+ assertEquals('A', new C().a());
+ assertEquals('B', new C()[1]());
+ assertEquals('C', new C().c());
+ assertEquals('D', new C()[2]());
+ // Array indexes first.
+ assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(C.prototype));
+})();
+
+
+(function TestClassMethodSymbol() {
+ var sym1 = Symbol();
+ var sym2 = Symbol();
+ class C {
+ a() { return 'A'; }
+ [sym1]() { return 'B'; }
+ c() { return 'C'; }
+ [ID(sym2)]() { return 'D'; }
+ }
+ assertEquals('A', new C().a());
+ assertEquals('B', new C()[sym1]());
+ assertEquals('C', new C().c());
+ assertEquals('D', new C()[sym2]());
+ assertArrayEquals(['a', 'c'], Object.keys(C.prototype));
+ assertArrayEquals([sym1, sym2], Object.getOwnPropertySymbols(C.prototype));
+})();
+
+
+
+(function TestStaticClassMethodString() {
+ class C {
+ static a() { return 'A'}
+ static ['b']() { return 'B'; }
+ static c() { return 'C'; }
+ static ['d']() { return 'D'; }
+ }
+ assertEquals('A', C.a());
+ assertEquals('B', C.b());
+ assertEquals('C', C.c());
+ assertEquals('D', C.d());
+ assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(C));
+})();
+
+
+(function TestStaticClassMethodNumber() {
+ class C {
+ static a() { return 'A'; }
+ static [1]() { return 'B'; }
+ static c() { return 'C'; }
+ static [2]() { return 'D'; }
+ }
+ assertEquals('A', C.a());
+ assertEquals('B', C[1]());
+ assertEquals('C', C.c());
+ assertEquals('D', C[2]());
+ // Array indexes first.
+ assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(C));
+})();
+
+
+(function TestStaticClassMethodSymbol() {
+ var sym1 = Symbol();
+ var sym2 = Symbol();
+ class C {
+ static a() { return 'A'; }
+ static [sym1]() { return 'B'; }
+ static c() { return 'C'; }
+ static [sym2]() { return 'D'; }
+ }
+ assertEquals('A', C.a());
+ assertEquals('B', C[sym1]());
+ assertEquals('C', C.c());
+ assertEquals('D', C[sym2]());
+ assertArrayEquals(['a', 'c'], Object.keys(C));
+ assertArrayEquals([sym1, sym2], Object.getOwnPropertySymbols(C));
+})();
+
+
+
+function assertIteratorResult(value, done, result) {
+ assertEquals({ value: value, done: done}, result);
+}
+
+
+(function TestGeneratorComputedName() {
+ class C {
+ *['a']() {
+ yield 1;
+ yield 2;
+ }
+ }
+ var iter = new C().a();
+ assertIteratorResult(1, false, iter.next());
+ assertIteratorResult(2, false, iter.next());
+ assertIteratorResult(undefined, true, iter.next());
+ assertArrayEquals(['a'], Object.keys(C.prototype));
+})();
+
+
+(function TestToNameSideEffects() {
+ var counter = 0;
+ var key1 = {
+ toString: function() {
+ assertEquals(0, counter++);
+ return 'b';
+ }
+ };
+ var key2 = {
+ toString: function() {
+ assertEquals(1, counter++);
+ return 'd';
+ }
+ };
+ class C {
+ a() { return 'A'; }
+ [key1]() { return 'B'; }
+ c() { return 'C'; }
+ [key2]() { return 'D'; }
+ }
+ assertEquals(2, counter);
+ assertEquals('A', new C().a());
+ assertEquals('B', new C().b());
+ assertEquals('C', new C().c());
+ assertEquals('D', new C().d());
+ assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(C.prototype));
+})();
+
+
+(function TestToNameSideEffectsNumbers() {
+ var counter = 0;
+ var key1 = {
+ valueOf: function() {
+ assertEquals(0, counter++);
+ return 1;
+ },
+ toString: null
+ };
+ var key2 = {
+ valueOf: function() {
+ assertEquals(1, counter++);
+ return 2;
+ },
+ toString: null
+ };
+
+ class C {
+ a() { return 'A'; }
+ [key1]() { return 'B'; }
+ c() { return 'C'; }
+ [key2]() { return 'D'; }
+ }
+ assertEquals(2, counter);
+ assertEquals('A', new C().a());
+ assertEquals('B', new C()[1]());
+ assertEquals('C', new C().c());
+ assertEquals('D', new C()[2]());
+ // Array indexes first.
+ assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(C.prototype));
+})();
+
+
+(function TestGetter() {
+ class C {
+ get ['a']() {
+ return 'A';
+ }
+ }
+ assertEquals('A', new C().a);
+
+ class C2 {
+ get b() {
+ assertUnreachable();
+ }
+ get ['b']() {
+ return 'B';
+ }
+ }
+ assertEquals('B', new C2().b);
+
+ class C3 {
+ get c() {
+ assertUnreachable();
+ }
+ get ['c']() {
+ assertUnreachable();
+ }
+ get ['c']() {
+ return 'C';
+ }
+ }
+ assertEquals('C', new C3().c);
+
+ class C4 {
+ get ['d']() {
+ assertUnreachable();
+ }
+ get d() {
+ return 'D';
+ }
+ }
+ assertEquals('D', new C4().d);
+})();
+
+
+(function TestSetter() {
+ var calls = 0;
+ class C {
+ set ['a'](_) {
+ calls++;
+ }
+ }
+ new C().a = 'A';
+ assertEquals(1, calls);
+
+ calls = 0;
+ class C2 {
+ set b(_) {
+ assertUnreachable();
+ }
+ set ['b'](_) {
+ calls++;
+ }
+ }
+ new C2().b = 'B';
+ assertEquals(1, calls);
+
+ calls = 0;
+ class C3 {
+ set c(_) {
+ assertUnreachable()
+ }
+ set ['c'](_) {
+ assertUnreachable()
+ }
+ set ['c'](_) {
+ calls++
+ }
+ }
+ new C3().c = 'C';
+ assertEquals(1, calls);
+
+ calls = 0;
+ class C4 {
+ set ['d'](_) {
+ assertUnreachable()
+ }
+ set d(_) {
+ calls++
+ }
+ }
+ new C4().d = 'D';
+ assertEquals(1, calls);
+})();
+
+
+(function TestPrototype() {
+ // Normally a static prototype property is not allowed.
+ class C {
+ static ['prototype']() {
+ return 1;
+ }
+ }
+ assertEquals(1, C.prototype());
+
+ class C2 {
+ static get ['prototype']() {
+ return 2;
+ }
+ }
+ assertEquals(2, C2.prototype);
+
+ var calls = 0;
+ class C3 {
+ static set ['prototype'](x) {
+ assertEquals(3, x);
+ calls++;
+ }
+ }
+ C3.prototype = 3;
+ assertEquals(1, calls);
+
+ class C4 {
+ static *['prototype']() {
+ yield 1;
+ yield 2;
+ }
+ }
+ var iter = C4.prototype();
+ assertIteratorResult(1, false, iter.next());
+ assertIteratorResult(2, false, iter.next());
+ assertIteratorResult(undefined, true, iter.next());
+})();
+
+
+(function TestConstructor() {
+ // Normally a constructor property is not allowed.
+ class C {
+ ['constructor']() {
+ return 1;
+ }
+ }
+ assertTrue(C !== C.prototype.constructor);
+ assertEquals(1, new C().constructor());
+
+ class C2 {
+ get ['constructor']() {
+ return 2;
+ }
+ }
+ assertEquals(2, new C2().constructor);
+
+ var calls = 0;
+ class C3 {
+ set ['constructor'](x) {
+ assertEquals(3, x);
+ calls++;
+ }
+ }
+ new C3().constructor = 3;
+ assertEquals(1, calls);
+
+ class C4 {
+ *['constructor']() {
+ yield 1;
+ yield 2;
+ }
+ }
+ var iter = new C4().constructor();
+ assertIteratorResult(1, false, iter.next());
+ assertIteratorResult(2, false, iter.next());
+ assertIteratorResult(undefined, true, iter.next());
+})();

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