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Side by Side Diff: test/mjsunit/es6/block-eval-var-over-legacy-const.js

Issue 1571793002: Reland of Ship ES2015 sloppy-mode function hoisting, let, class (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 11 months ago
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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 // Flags: --harmony-sloppy --harmony-sloppy-let --harmony-sloppy-function
6
7 // Var-let conflict in a function throws, even if the var is in an eval
8
9 // Throws at the top level of a function
10 assertThrows(function() {
11 let x = 1;
12 eval('const x = 2');
13 }, TypeError);
14
15 // If the eval is in its own block scope, throws
16 assertThrows(function() {
17 let y = 1;
18 { eval('const y = 2'); }
19 }, TypeError);
20
21 // If the let is in its own block scope, with the eval, throws
22 assertThrows(function() {
23 {
24 let x = 1;
25 eval('const x = 2');
26 }
27 }, TypeError);
28
29 // Legal if the let is no longer visible
30 assertDoesNotThrow(function() {
31 {
32 let x = 1;
33 }
34 eval('const x = 2');
35 });
36
37 // In global scope
38 let caught = false;
39 try {
40 let z = 1;
41 eval('const z = 2');
42 } catch (e) {
43 caught = true;
44 }
45 assertTrue(caught);
46
47 // Let declarations beyond a function boundary don't conflict
48 caught = false;
49 try {
50 let a = 1;
51 (function() {
52 eval('const a');
53 })();
54 } catch (e) {
55 caught = true;
56 }
57 assertFalse(caught);
58
59 // var across with doesn't conflict
60 caught = false;
61 try {
62 (function() {
63 with ({x: 1}) {
64 eval("const x = 2;");
65 }
66 })();
67 } catch (e) {
68 caught = true;
69 }
70 assertFalse(caught);
71
72 // var can still conflict with let across a with
73 caught = false;
74 try {
75 (function() {
76 let x;
77 with ({x: 1}) {
78 eval("const x = 2;");
79 }
80 })();
81 } catch (e) {
82 caught = true;
83 }
84 assertTrue(caught);
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