diff options
Diffstat (limited to 'js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-init-skipped.js')
-rw-r--r-- | js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-init-skipped.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-init-skipped.js b/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-init-skipped.js new file mode 100644 index 0000000000..2afde0480a --- /dev/null +++ b/js/src/tests/test262/language/statements/const/dstr/ary-ptrn-elem-id-init-skipped.js @@ -0,0 +1,42 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case +// - src/dstr-binding/default/const-stmt.template +/*--- +description: Destructuring initializer is not evaluated when value is not `undefined` (`const` statement) +esid: sec-let-and-const-declarations-runtime-semantics-evaluation +features: [destructuring-binding] +flags: [generated] +info: | + LexicalBinding : BindingPattern Initializer + + 1. Let rhs be the result of evaluating Initializer. + 2. Let value be GetValue(rhs). + 3. ReturnIfAbrupt(value). + 4. Let env be the running execution context's LexicalEnvironment. + 5. Return the result of performing BindingInitialization for BindingPattern + using value and env as the arguments. + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + SingleNameBinding : BindingIdentifier Initializeropt + + [...] + 6. If Initializer is present and v is undefined, then + [...] + 7. If environment is undefined, return PutValue(lhs, v). + 8. Return InitializeReferencedBinding(lhs, v). +---*/ +var initCount = 0; +function counter() { + initCount += 1; +} + +const [w = counter(), x = counter(), y = counter(), z = counter()] = [null, 0, false, '']; + +assert.sameValue(w, null); +assert.sameValue(x, 0); +assert.sameValue(y, false); +assert.sameValue(z, ''); +assert.sameValue(initCount, 0); + +reportCompare(0, 0); |