mirror of https://github.com/tc39/test262.git
34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
// Copyright (C) 2016 Michael Ficarra. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: Assert _NativeFunction_ Syntax
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info: |
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This regex makes a best-effort determination that the tested string matches
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the NativeFunction grammar production without requiring a correct tokeniser.
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NativeFunction :
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function _IdentifierName_ opt ( _FormalParameters_ ) { [ native code ] }
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defines:
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- NATIVE_FUNCTION_RE
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- assertToStringOrNativeFunction
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- assertNativeFunction
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---*/
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const NATIVE_FUNCTION_RE = /\bfunction\b[\s\S]*\([\s\S]*\)[\s\S]*\{[\s\S]*\[[\s\S]*\bnative\b[\s\S]+\bcode\b[\s\S]*\][\s\S]*\}/;
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const assertToStringOrNativeFunction = function(fn, expected) {
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const actual = "" + fn;
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try {
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assert.sameValue(actual, expected);
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} catch (unused) {
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assertNativeFunction(fn, expected);
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}
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};
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const assertNativeFunction = function(fn, special) {
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const actual = "" + fn;
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assert(
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NATIVE_FUNCTION_RE.test(actual),
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"Conforms to NativeFunction Syntax: '" + actual + "'." + (special ? "(" + special + ")" : "")
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);
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};
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