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1 // Copyright 2015 the V8 project authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 | |
6 function return_specified() { return "specified"; } | |
7 | |
8 var method_returns_specified = { | |
9 method() { return "specified"; } | |
10 }; | |
11 | |
12 | |
13 (function testOptionalFunctions() { | |
14 function optional_function(handler = function() { }) { | |
15 assertEquals("function", typeof handler); | |
16 | |
17 // TODO(caitp): infer function name correctly | |
arv (Not doing code reviews)
2015/05/06 20:32:38
https://code.google.com/p/v8/issues/detail?id=3699
caitp (gmail)
2015/05/06 20:42:55
Acknowledged.
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18 // assertEquals("handler", handler.name); | |
19 | |
20 return handler(); | |
21 } | |
22 assertEquals(undefined, optional_function()); | |
23 assertEquals(undefined, optional_function(undefined)); | |
24 assertEquals("specified", optional_function(return_specified)); | |
25 })(); | |
26 | |
27 | |
28 (function testOptionalObjects() { | |
29 function optional_object(object = { method() { return "method"; } }) { | |
30 assertEquals("object", typeof object); | |
31 | |
32 assertEquals("function", typeof object.method); | |
33 return object.method(); | |
34 } | |
35 | |
36 assertEquals("method", optional_object()); | |
37 assertEquals("method", optional_object(undefined)); | |
38 assertEquals("specified", optional_object(method_returns_specified)); | |
39 })(); | |
40 | |
41 | |
42 // TDZ | |
43 | |
44 (function testReferencesUninitializedParameter(x = 1) { | |
45 assertThrows(function(a = b, b) {}, ReferenceError); | |
46 })(); | |
47 | |
48 | |
49 (function testReferencesInitializedParameter(x = 1) { | |
50 assertEquals(1, (function(a = 1, b = a) { return b; })()); | |
51 })(); | |
52 | |
53 | |
54 // Scoping | |
55 // | |
56 // TODO(caitp): fix scoping --- var declarations in function body can't be | |
57 // resolved in formal parameters | |
58 // assertThrows(function referencesVariableBodyDeclaration(a = body_var) { | |
59 // var body_var = true; | |
60 // return a; | |
61 // }, ReferenceError); | |
62 | |
63 | |
64 // TODO(caitp): default function length does not include any parameters | |
65 // following the first optional parameter | |
66 // assertEquals(0, (function(a = 1) {}).length); | |
67 // assertEquals(1, (function(a, b = 1) {}).length); | |
68 // assertEquals(2, (function(a, b, c = 1) {}).length); | |
69 // assertEquals(3, (function(a, b, c, d = 1) {}).length); | |
70 // assertEquals(1, (function(a, b = 1, c, d = 1) {}).length); | |
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