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