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parser.js
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parser.js
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/**
* Tests for the parser/tokenizer
*/
"use strict";
var JSHINT = require("../..").JSHINT;
var fs = require('fs');
var TestRun = require("../helpers/testhelper").setup.testRun;
var path = require("path");
/**
* The warning for this input was intentionally disabled after research into
* its justification produced no results.
*/
exports.unsafe = function (test) {
var code = [
"var a\u000a = 'Here is a unsafe character';",
];
TestRun(test)
.test(code, {es3: true});
test.done();
};
exports.peekOverDirectives = function (test) {
var code = fs.readFileSync(__dirname + "/fixtures/peek-over-directives.js", "utf8");
TestRun(test)
// Within object literal
.addError(18, 14, "Unexpected control character in regular expression.")
.addError(19, 14, "Unexpected escaped character '<' in regular expression.")
.addError(20, 81, "Line is too long.")
.addError(21, 15, "Control character in string: <non-printable>.")
.addError(22, 14, "'Octal integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(23, 14, "'Binary integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(24, 14, "'template literal syntax' is only available in ES6 (use 'esversion: 6').")
.addError(25, 14, "'Sticky RegExp flag' is only available in ES6 (use 'esversion: 6').")
// Within array literal:
.addError(44, 3, "Unexpected control character in regular expression.")
.addError(45, 3, "Unexpected escaped character '<' in regular expression.")
.addError(46, 81, "Line is too long.")
.addError(47, 4, "Control character in string: <non-printable>.")
.addError(48, 3, "'Octal integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(49, 3, "'Binary integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(50, 3, "'template literal syntax' is only available in ES6 (use 'esversion: 6').")
.addError(51, 3, "'Sticky RegExp flag' is only available in ES6 (use 'esversion: 6').")
// Within grouping operator:
.addError(70, 3, "Unexpected control character in regular expression.")
.addError(71, 3, "Unexpected escaped character '<' in regular expression.")
.addError(72, 81, "Line is too long.")
.addError(73, 4, "Control character in string: <non-printable>.")
.addError(74, 3, "'Octal integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(75, 3, "'Binary integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(76, 3, "'template literal syntax' is only available in ES6 (use 'esversion: 6').")
.addError(77, 3, "'Sticky RegExp flag' is only available in ES6 (use 'esversion: 6').")
.test(code);
test.done();
};
exports.other = function (test) {
var code = [
"\\",
"!",
];
TestRun(test)
.addError(1, 1, "Unexpected '\\'.")
.addError(2, 1, "Unexpected early end of program.")
.addError(2, 1, "Unrecoverable syntax error. (100% scanned).")
.test(code, {es3: true});
// GH-818
TestRun(test)
.addError(1, 15, "Expected an identifier and instead saw ')'.")
.addError(1, 15, "Unrecoverable syntax error. (100% scanned).")
.test("if (product < ) {}", {es3: true});
// GH-2506
TestRun(test)
.addError(1, 7, "Expected an identifier and instead saw ';'.")
.addError(1, 1, "Unrecoverable syntax error. (100% scanned).")
.test("typeof;");
TestRun(test)
.addError(1, 1, "Unrecoverable syntax error. (0% scanned).")
.test("}");
test.done();
};
exports.confusingOps = function (test) {
var code = [
"var a = 3 - -3;",
"var b = 3 + +3;",
"a = a - --a;",
"a = b + ++b;",
"a = a-- - 3;", // this is not confusing?!
"a = a++ + 3;", // this is not confusing?!
];
var run = TestRun(test, "AdditiveExpressions")
.addError(1, 13, "Confusing minuses.")
.addError(2, 13, "Confusing plusses.")
.addError(3, 9, "Confusing minuses.")
.addError(4, 9, "Confusing plusses.");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
TestRun(test, "UnaryExpressions")
.addError(1, 8, "Confusing minuses.")
.addError(2, 8, "Confusing minuses.")
.addError(3, 8, "Confusing plusses.")
.addError(4, 8, "Confusing plusses.")
.test([
"void - -x;",
"void - --x;",
"void + +x;",
"void + ++x;"
]);
test.done();
};
exports.division = function (test) {
var run;
var code = [
'var a=4,b=4,i=2;',
'a/=b+2;',
'a/=b/2;',
'a/=b/i;',
'/*jshint expr:true*/',
'/=b/i;' // valid standalone RegExp expression
];
run = TestRun(test);
run.test(code);
test.done();
};
exports.plusplus = function (test) {
var run;
var code = [
"var a = ++[2];",
"var b = --(2);",
"var c = [2]++;",
"var d = (2)--;",
];
run = TestRun(test)
.addError(1, 9, "Unexpected use of '++'.")
.addError(1, 9, "Bad assignment.")
.addError(2, 9, "Unexpected use of '--'.")
.addError(2, 9, "Bad assignment.")
.addError(3, 12, "Unexpected use of '++'.")
.addError(3, 12, "Bad assignment.")
.addError(4, 12, "Unexpected use of '--'.")
.addError(4, 12, "Bad assignment.");
run.test(code, { plusplus: true, es3: true });
run.test(code, { plusplus: true }); // es5
run.test(code, { plusplus: true, esnext: true });
run.test(code, { plusplus: true, moz: true });
run = TestRun(test)
.addError(1, 9, "Bad assignment.")
.addError(2, 9, "Bad assignment.")
.addError(3, 12, "Bad assignment.")
.addError(4, 12, "Bad assignment.");
run.test(code, { plusplus: false, es3: true });
run.test(code, { plusplus: false }); // es5
run.test(code, { plusplus: false, esnext: true });
run.test(code, { plusplus: false, moz: true });
test.done();
};
exports.assignment = function (test) {
var code = [
"function test() {",
" arguments.length = 2;",
" arguments[0] = 3;",
" arguments.length &= 2;",
" arguments[0] >>= 3;",
"}",
"function test2() {",
" \"use strict\";",
" arguments.length = 2;",
" arguments[0] = 3;",
" arguments.length &= 2;",
" arguments[0] >>= 3;",
"}",
"a() = 2;",
];
var run = TestRun(test)
.addError(2, 20, "Assignment to properties of a mapped arguments object may cause unexpected changes to formal parameters.")
.addError(3, 16, "Assignment to properties of a mapped arguments object may cause unexpected changes to formal parameters.")
.addError(4, 20, "Assignment to properties of a mapped arguments object may cause unexpected changes to formal parameters.")
.addError(5, 16, "Assignment to properties of a mapped arguments object may cause unexpected changes to formal parameters.")
.addError(14, 5, "Bad assignment.");
run.test(code, { plusplus: true, es3: true });
run.test(code, { plusplus: true }); // es5
run.test(code, { plusplus: true, esnext: true });
run.test(code, { plusplus: true, moz: true });
TestRun(test, "assignment to `eval` outside of strict mode code")
.test([
"(function() {",
" var eval = 3;",
"}());"
]);
TestRun(test, "assignment to `eval` within strict mode code")
.addError(5, 10, "Bad assignment.")
.test([
"(function() {",
" var eval;",
" (function() {",
" 'use strict';",
" eval = 3;",
" }());",
"}());"
]);
TestRun(test, "assignment to `arguments` outside of strict mode code")
.addError(2, 13, "Assignment to properties of a mapped arguments object may cause unexpected changes to formal parameters.")
.test([
"(function() {",
" arguments = 3;",
"}());"
]);
TestRun(test, "assignment to `arguments` within strict mode code")
.addError(3, 13, "Bad assignment.")
.test([
"(function() {",
" 'use strict';",
" arguments = 3;",
"}());"
]);
test.done();
};
exports.relations = function (test) {
var code = [
"var a = 2 === NaN;",
"var b = NaN == 2;",
"var c = !2 < 3;",
"var c = 2 < !3;",
"var d = (!'x' in obj);",
"var e = (!a === b);",
"var f = (a === !'hi');",
"var g = (!2 === 1);",
"var h = (![1, 2, 3] === []);",
"var i = (!([]) instanceof Array);"
];
var run = TestRun(test)
.addError(1, 11, "Use the isNaN function to compare with NaN.")
.addError(2, 13, "Use the isNaN function to compare with NaN.")
.addError(3, 9, "Confusing use of '!'.")
.addError(4, 13, "Confusing use of '!'.")
.addError(5, 10, "Confusing use of '!'.")
.addError(6, 10, "Confusing use of '!'.")
.addError(7, 16, "Confusing use of '!'.")
.addError(8, 10, "Confusing use of '!'.")
.addError(9, 10, "Confusing use of '!'.")
.addError(10, 10, "Confusing use of '!'.");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
TestRun(test, "No suitable expression following logical NOT.")
.addError(1, 7, "Expected an identifier and instead saw ';'.")
.addError(1, 6, "Unrecoverable syntax error. (100% scanned).")
.test("void !;");
TestRun(test, "Logical NOT in combination with 'infix' operators.")
.addError(3, 6, "Confusing use of '!'.")
.addError(4, 6, "Confusing use of '!'.")
.addError(5, 6, "Confusing use of '!'.")
.addError(6, 6, "Confusing use of '!'.")
.addError(7, 6, "Confusing use of '!'.")
.addError(8, 6, "Confusing use of '!'.")
.addError(9, 6, "Confusing use of '!'.")
.addError(10, 6, "Confusing use of '!'.")
.addError(11, 6, "Confusing use of '!'.")
.addError(12, 6, "Confusing use of '!'.")
.addError(13, 6, "Confusing use of '!'.")
.addError(14, 6, "Confusing use of '!'.")
.addError(15, 6, "Confusing use of '!'.")
.test([
"void !'-';",
"void !'+';",
"void !(0 < 0);",
"void !(0 <= 0);",
"void !(0 == 0);",
"void !(0 === 0);",
"void !(0 !== 0);",
"void !(0 != 0);",
"void !(0 > 0);",
"void !(0 >= 0);",
"void !(0 + 0);",
"void !(0 - 0);",
"void !(0 * 0);",
"void !(0 / 0);",
"void !(0 % 0);",
]);
TestRun(test, "Logical NOT in combination with other unary operators.")
.addError(3, 6, "Confusing use of '!'.")
.addError(4, 6, "Confusing use of '!'.")
.test([
"void !'-';",
"void !'+';",
"void !+0;",
"void !-0;"
]);
test.done();
};
exports.options = function (test) {
var code = [
"/*member a*/",
"/*members b*/",
"var x; x.a.b.c();",
"/*jshint ++ */",
"/*jslint indent: 0 */",
"/*jslint indent: -2 */",
"/*jslint indent: 100.4 */",
"/*jslint maxlen: 200.4 */",
"/*jslint maxerr: 300.4 */",
"/*jslint maxerr: 0 */",
"/*jslint maxerr: 20 */",
"/*member c:true */",
"/*jshint d:no */",
"/*global xxx*/",
"xxx = 2;",
"/*jshint relaxing: true */",
"/*jshint toString: true */",
];
var run = TestRun(test)
.addError(3, 14, "Unexpected /*member 'c'.")
.addError(4, 1, "Bad option: '++'.")
.addError(5, 1, "Expected a small integer or 'false' and instead saw '0'.")
.addError(6, 1, "Expected a small integer or 'false' and instead saw '-2'.")
.addError(7, 1, "Expected a small integer or 'false' and instead saw '100.4'.")
.addError(8, 1, "Expected a small integer or 'false' and instead saw '200.4'.")
.addError(9, 1, "Expected a small integer or 'false' and instead saw '300.4'.")
.addError(10, 1, "Expected a small integer or 'false' and instead saw '0'.")
.addError(13, 1, "Bad option: 'd'.")
.addError(15, 1, "Read only.")
.addError(16, 1, "Bad option: 'relaxing'.")
.addError(17, 1, "Bad option: 'toString'.");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
TestRun(test).test(fs.readFileSync(__dirname + "/fixtures/gh988.js", "utf8"));
test.done();
};
exports.emptyDirectives = function (test) {
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* global */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* global : */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* global -: */');
TestRun(test)
.test('/* global foo, bar, baz, */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* globals */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* globals : */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* globals -: */');
TestRun(test)
.test('/* globals foo, bar, baz, */');
TestRun(test)
.addError(1, 1, "Bad option value.")
.test('/* exported */');
TestRun(test)
.test('/* exported foo, bar, baz, */');
test.done();
};
exports["jshint option comments single line"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-1.js", "utf8");
TestRun(test).test(src);
test.done();
};
exports["jshint option comments single line, leading and trailing space"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-2.js", "utf8");
TestRun(test).test(src);
test.done();
};
exports["jshint option comments multi line"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-3.js", "utf8");
TestRun(test).test(src);
test.done();
};
exports["jshint option comments multi line, leading and trailing space"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-4.js", "utf8");
TestRun(test)
.addError(4, 1, "'foo' is not defined.")
.test(src);
test.done();
};
exports["jshint option comments multi line/option"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-5.js", "utf8");
TestRun(test)
.addError(3, 1, "'foo' is not defined.")
.test(src);
test.done();
};
exports["jshint option comments multi line/option, leading and trailing space"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/gh1768-6.js", "utf8");
TestRun(test)
.addError(4, 1, "'foo' is not defined.")
.test(src);
test.done();
};
exports["jshint option inline comments, leading and trailing tabs and spaces"] = function (test) {
var src = fs.readFileSync(__dirname + "/fixtures/inline-tabs-spaces.js", "utf8");
TestRun(test)
.addError(3, 9, "'x' is defined but never used.")
.addError(10, 9, "'y' is defined but never used.")
.addError(17, 9, "'z' is defined but never used.")
.test(src);
test.done();
};
exports.shebang = function (test) {
var code = [
"#!test",
"var a = 'xxx';",
"#!test"
];
var run = TestRun(test)
.addError(3, 1, "Expected an identifier and instead saw '#'.")
.addError(3, 2, "Expected an operator and instead saw '!'.")
.addError(3, 2, "Expected an assignment or function call and instead saw an expression.")
.addError(3, 3, "Expected an assignment or function call and instead saw an expression.")
.addError(3, 3, "Missing semicolon.")
.addError(3, 7, "Missing semicolon.");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
test.done();
};
exports.shebangImpliesNode = function (test) {
var code = [
"#!usr/bin/env node",
"require('module');",
];
TestRun(test).test(code);
test.done();
};
exports.numbers = function (test) {
/*jshint maxlen: 300*/
var code = [
"var a = 10e307;",
"var b = 10e308;",
"var c = 0.03 + 0.3 + 3.0 + 30.00;",
"var d = 03;",
"var e = .3;",
"var f = 0xAAg;",
"var g = 0033;",
"var h = 3.;",
"var i = 3.7.toString();",
"var j = 1e-10;", // GH-821
"var k = 0o1234567;",
"var l = 0b101;",
"var m = 0x;",
"var n = 09;",
"var o = 1e-A;",
"var p = 1/;",
"var q = 1x;"
];
TestRun(test)
.addError(2, 15, "Value described by numeric literal cannot be accurately represented with a number value: '10e308'.")
.addError(5, 11, "A leading decimal point can be confused with a dot: '.3'.")
.addError(6, 9, "Unexpected '0'.")
.addError(7, 1, "Expected an identifier and instead saw 'var'.")
.addError(7, 4, "Missing semicolon.")
.addError(7, 13, "Don't use extra leading zeros '0033'.")
.addError(8, 11, "A trailing decimal point can be confused with a dot: '3.'.")
.addError(9, 9, "A dot following a number can be confused with a decimal point.")
.addError(11, 9, "'Octal integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(12, 9, "'Binary integer literal' is only available in ES6 (use 'esversion: 6').")
.addError(13, 11, "Malformed numeric literal: '0x'.")
.addError(15, 9, "Unexpected '1'.")
.addError(16, 11, "Expected an identifier and instead saw ';'.")
.addError(16, 1, "Expected an identifier and instead saw 'var'.")
.addError(16, 4, "Missing semicolon.")
.addError(16, 12, "Missing semicolon.")
.addError(17, 9, "Unexpected '1'.")
.addError(17, 7, "Unexpected early end of program.")
.addError(17, 9, "Unrecoverable syntax error. (100% scanned).")
.test(code, {es3: true});
// Octals are prohibited in strict mode.
TestRun(test)
.addError(3, 11, "Octal literals are not allowed in strict mode.")
.test([
"(function () {",
"'use strict';",
"return 045;",
"}());"
]);
TestRun(test)
.test([
"void 08;",
"void 0181;"
]);
TestRun(test)
.addError(3, 10, "Decimals with leading zeros are not allowed in strict mode.")
.test([
"(function () {",
"'use strict';",
"return 08;",
"}());"
]);
TestRun(test)
.addError(3, 12, "Decimals with leading zeros are not allowed in strict mode.")
.test([
"(function () {",
"'use strict';",
"return 0181;",
"}());"
]);
// GitHub #751 - an expression containing a number with a leading decimal point should be parsed in its entirety
TestRun(test)
.addError(1, 11, "A leading decimal point can be confused with a dot: '.3'.")
.addError(2, 15, "A leading decimal point can be confused with a dot: '.3'.")
.test([
"var a = .3 + 1;",
"var b = 1 + .3;",
]);
TestRun(test)
.addError(5, 18, "Missing semicolon.")
.addError(5, 18, "Expected an assignment or function call and instead saw an expression.")
.addError(6, 14, "Missing semicolon.")
.addError(6, 14, "Expected an assignment or function call and instead saw an expression.")
.test([
"var a = 0o1234567;",
"var b = 0O1234567;",
"var c = 0b101;",
"var d = 0B101;",
"var e = 0o12345678;",
"var f = 0b1012;",
], {esnext: true});
TestRun(test)
.test([
"// jshint esnext: true",
"var a = 0b0 + 0o0;"
]);
test.done();
};
exports.comments = function (test) {
var code = [
"/*",
"/* nested */",
"*/",
"/* unclosed ..",
];
var run = TestRun(test)
.addError(3, 1, "Unbegun comment.")
.addError(4, 1, "Unclosed comment.");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
var src = "/* this is a comment /* with nested slash-start */";
TestRun(test).test(src);
TestRun(test).test(fs.readFileSync(__dirname + "/fixtures/gruntComment.js", "utf8"));
TestRun(test)
.addError(1, 2, "Unmatched '{'.")
.addError(1, 2, "Unrecoverable syntax error. (100% scanned).")
.test("({");
test.done();
};
exports.regexp = {};
exports.regexp.basic = function (test) {
var code = [
"var a1 = /\\\x1f/;",
"var a2 = /[\\\x1f]/;",
"var b1 = /\\</;", // only \< is unexpected?!
"var b2 = /[\\<]/;", // only \< is unexpected?!
"var c = /(?(a)b)/;",
"var d = /)[--aa-b-cde-]/;",
"var e = /[]/;",
"var f = /[^]/;",
"var g = /[a^[]/;",
// FIXME: Firefox doesn't handle [a-\\s] well.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=813249
"", // "var h = /[a-\\s-\\w-\\d\\x10-\\x20--]/;",
"var i = /[/-a1-/]/;",
"var j = /[a-<<-3]./;",
"var k = /]}/;",
"var l = /?(*)(+)({)/;",
"var m = /a{b}b{2,c}c{3,2}d{4,?}x{30,40}/;",
"var n = /a??b+?c*?d{3,4}? a?b+c*d{3,4}/;",
"var o = /a\\/* [a-^-22-]/;",
"var p = /(?:(?=a|(?!b)))/;",
"var q = /=;/;",
"var r = /(/;",
"var s = /(((/;",
"var t = /x/* 2;",
"var u = /x/;",
"var w = v + /s/;",
"var x = w - /s/;",
"var y = typeof /[a-z]/;", // GH-657
"var z = /a/ instanceof /a/.constructor;", // GH-2773
"void /./;",
"var v = /dsdg;"
];
var run = TestRun(test)
.addError(1, 10, "Unexpected control character in regular expression.")
.addError(2, 10, "Unexpected control character in regular expression.")
.addError(3, 10, "Unexpected escaped character '<' in regular expression.")
.addError(4, 10, "Unexpected escaped character '<' in regular expression.")
.addError(5, 9, "Invalid regular expression.")
.addError(6, 9, "Invalid regular expression.")
.addError(11, 9, "Invalid regular expression.")
.addError(12, 9, "Invalid regular expression.")
.addError(14, 9, "Invalid regular expression.")
.addError(15, 9, "Invalid regular expression.")
.addError(17, 9, "Invalid regular expression.")
.addError(20, 9, "Invalid regular expression.")
.addError(21, 9, "Invalid regular expression.")
.addError(29, 9, "Unclosed regular expression.")
.addError(29, 9, "Unrecoverable syntax error. (100% scanned).");
run.test(code, {es3: true});
run.test(code, {}); // es5
run.test(code, {esnext: true});
run.test(code, {moz: true});
TestRun(test).test("var a = `${/./}${/./}`;", { esversion: 6 });
// Pre Regular Expression Punctuation
// (See: token method, create function in lex.js)
//
// "."
TestRun(test)
.addError(1, 12, "A trailing decimal point can be confused with a dot: '10.'.")
.test("var y = 10. / 1;", {es3: true});
TestRun(test)
.addError(1, 12, "A trailing decimal point can be confused with a dot: '10.'.")
.test("var y = 10. / 1;", {}); // es5
TestRun(test)
.addError(1, 12, "A trailing decimal point can be confused with a dot: '10.'.")
.test("var y = 10. / 1;", {esnext: true});
TestRun(test)
.addError(1, 12, "A trailing decimal point can be confused with a dot: '10.'.")
.test("var y = 10. / 1;", {moz: true});
// ")"
TestRun(test).test("var y = Math.sqrt(16) / 180;", {es3: true});
TestRun(test).test("var y = Math.sqrt(16) / 180;", {}); // es5
TestRun(test).test("var y = Math.sqrt(16) / 180;", {esnext: true});
TestRun(test).test("var y = Math.sqrt(16) / 180;", {moz: true});
// "~"
TestRun(test).test("var y = ~16 / 180;", {es3: true});
TestRun(test).test("var y = ~16 / 180;", {}); // es5
TestRun(test).test("var y = ~16 / 180;", {esnext: true});
TestRun(test).test("var y = ~16 / 180;", {moz: true});
// "]" (GH-803)
TestRun(test).test("var x = [1]; var y = x[0] / 180;", {es3: true});
TestRun(test).test("var x = [1]; var y = x[0] / 180;", {}); // es5
TestRun(test).test("var x = [1]; var y = x[0] / 180;", {esnext: true});
TestRun(test).test("var x = [1]; var y = x[0] / 180;", {moz: true});
// "++" (GH-1787)
TestRun(test).test("var a = 1; var b = a++ / 10;", {es3: true});
TestRun(test).test("var a = 1; var b = a++ / 10;", {}); // es5
TestRun(test).test("var a = 1; var b = a++ / 10;", {esnext: true});
TestRun(test).test("var a = 1; var b = a++ / 10;", {moz: true});
// "--" (GH-1787)
TestRun(test).test("var a = 1; var b = a-- / 10;", {es3: true});
TestRun(test).test("var a = 1; var b = a-- / 10;", {}); // es5
TestRun(test).test("var a = 1; var b = a-- / 10;", {esnext: true});
TestRun(test).test("var a = 1; var b = a-- / 10;", {moz: true});
TestRun(test, "gh-3308").test("void (function() {} / 0);");
TestRun(test)
.addError(1, 9, "Invalid regular expression.")
.test("var a = /.*/ii;");
TestRun(test, "Invalid Decimal Escape Sequence tolerated without `u` flag")
.test([
"void /\\00/;",
"void /\\01/;",
"void /\\02/;",
"void /\\03/;",
"void /\\04/;",
"void /\\05/;",
"void /\\06/;",
"void /\\07/;",
"void /\\08/;",
"void /\\09/;"
]);
TestRun(test, "following `new`")
.addError(1, 5, "Bad constructor.")
.addError(1, 5, "Missing '()' invoking a constructor.")
.test("new /./;");
TestRun(test, "following `delete`")
.addError(1, 11, "Variables should not be deleted.")
.test("delete /./;");
TestRun(test, "following `extends`")
.test("class R extends /./ {}", {esversion: 6});
TestRun(test, "following `default`")
.test("export default /./;", {esversion: 6, module: true});
test.done();
};
exports.regexp.uFlag = function (test) {
// Flag validity
TestRun(test)
.addError(1, 9, "'Unicode RegExp flag' is only available in ES6 (use 'esversion: 6').")
.test("var a = /.*/u;");
TestRun(test)
.test("var a = /.*/u;", { esversion: 6 });
// Hexidecimal limits
TestRun(test)
.addError(3, 5, "Invalid regular expression.")
.test([
"var a = /\\u{0}/u;",
"a = /\\u{10FFFF}/u;",
"a = /\\u{110000}/u;"
], { esnext: true });
TestRun(test, "Guard against regression from escape sequence substitution")
.test("void /\\u{3f}/u;", { esversion: 6 });
// Hexidecimal in range patterns
TestRun(test)
.addError(3, 5, "Invalid regular expression.")
.addError(4, 5, "Invalid regular expression.")
.test([
"var a = /[\\u{61}-b]/u;",
"a = /[\\u{061}-b]/u;",
"a = /[\\u{63}-b]/u;",
"a = /[\\u{0063}-b]/u;",
], { esnext: true });
TestRun(test)
.test("var x = /[\uD834\uDF06-\uD834\uDF08a-z]/u;", { esversion: 6 });
TestRun(test)
.addError(1, 6, "Invalid regular expression.")
.test("void /.{}/u;", { esversion: 6 });
TestRun(test)
.test([
"void /.{0}/;",
"void /.{0}/u;",
"void /.{9}/;",
"void /.{9}/u;",
"void /.{23}/;",
"void /.{23}/u;"
], { esversion: 6 });
TestRun(test)
.addError(1, 6, "Invalid regular expression.")
.test("void /.{,2}/u;", { esversion: 6 });
TestRun(test)
.addError(1, 6, "Invalid regular expression.")
.test("void /.{2,1}/u;", { esversion: 6 });
TestRun(test, "Invalid group reference")
.addError(1, 6, "Invalid regular expression.")
.test("void /(.)(.)\\3/u;", { esversion: 6 });
TestRun(test, "Valid group reference - multiple digits")
.test([
"void /(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)\\10/u;",
"void /(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)\\10a/u;",
"void /(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)\\11/u;",
"void /(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)\\11a/u;"
], { esversion: 6 });
// A negative syntax test is the only way to verify JSHint is interpeting the
// adjacent digits as one reference as opposed to a reference followed by a
// literal digit.
TestRun(test, "Invalid group reference - two digits")
.addError(1, 6, "Invalid regular expression.")
.test("void /(.)\\10/u;", { esversion: 6 });
TestRun(test, "Invalid group reference - three digits")
.addError(1, 6, "Invalid regular expression.")
.test("void /(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)\\100/u;", { esversion: 6 });
TestRun(test, "Invalid group reference (permitted without flag)")
.test("void /(.)(.)\\3/;", { esversion: 6 });
TestRun(test, "Invalid unicode escape sequence")
.addError(1, 6, "Invalid regular expression.")
.test("void /\\u{123,}/u;", { esversion: 6 });
TestRun(test, "Invalid unicode escape sequence (permitted without flag)")
.test("void /\\u{123,}/;", { esversion: 6 });
TestRun(test, "Invalid character escape")
.addError(1, 6, "Invalid regular expression.")
.test("void /\\m/u;", { esversion: 6 });
TestRun(test, "Invalid character escape (permitted without flag)")
.test("void /\\m/;", { esversion: 6 });
TestRun(test, "Invalid quantifed group")
.addError(1, 6, "Invalid regular expression.")
.test("void /(?=.)?/u;", { esversion: 6 });
TestRun(test, "Invalid quantifed group (permitted without flag)")
.test("void /(?=.)?/;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed")
.addError(1, 6, "Invalid regular expression.")
.test("void /.{1/u;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed (permitted without flag)")
.test("void /.{1/;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed with comma")
.addError(1, 6, "Invalid regular expression.")
.test("void /.{1,/u;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed with comma (permitted without flag)")
.test("void /.{1,/;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed with upper bound")
.addError(1, 6, "Invalid regular expression.")
.test("void /.{1,2/u;", { esversion: 6 });
TestRun(test, "Invalid quantifier - unclosed with upper bound (permitted without flag)")
.test("void /.{1,2/;", { esversion: 6 });
TestRun(test, "Character class in lower bound of range (permitted without flag)")
.test('void /[\\s-1]/;', { esversion: 6 });
TestRun(test, "Character class in lower bound of range")
.addError(1, 6, "Invalid regular expression.")
.test('void /[\\s-1]/u;', { esversion: 6 });
TestRun(test, "Character class in upper bound of range (permitted without flag)")
.test('void /[1-\\W]/;', { esversion: 6 });
TestRun(test, "Character class in upper bound of range")
.addError(1, 6, "Invalid regular expression.")
.test('void /[1-\\W]/u;', { esversion: 6 });
TestRun(test)
.test('void /[\\s0-1\\s2-3\\s]/u;', { esversion: 6 });
TestRun(test, "Null CharacterEscape")
.test([
"void /\\0/u;",
"void /\\0a/u;"
], { esversion: 6 });
TestRun(test)
.addError(1, 6, "Invalid regular expression.")
.test("void /\\00/u;", { esversion: 6 });
TestRun(test)
.addError(1, 6, "Invalid regular expression.")
.test("void /\\01/u;", { esversion: 6 });
TestRun(test, "ControlEscape")
.test([
"void /\\f/u;",
"void /\\n/u;",
"void /\\r/u;",
"void /\\t/u;",
"void /\\v/u;"
], { esversion: 6 });
test.done();
};
exports.regexp.yFlag = function (test) {
// Flag validity
TestRun(test)
.addError(1, 9, "'Sticky RegExp flag' is only available in ES6 (use 'esversion: 6').")
.test("var a = /.*/y;");
TestRun(test)
.test("var a = /.*/y;", { esversion: 6 });
TestRun(test)
.addError(1, 9, "Invalid regular expression.")
.test("var a = /.*/yiy;", { esversion: 6 });
test.done();
};
exports.regexp.dotAll = function (test) {
TestRun(test, "flag presence - disallowed in editions prior to 2018")
.addError(1, 6, "'DotAll RegExp flag' is only available in ES9 (use 'esversion: 9').")
.addError(2, 6, "'DotAll RegExp flag' is only available in ES9 (use 'esversion: 9').")
.addError(3, 6, "'DotAll RegExp flag' is only available in ES9 (use 'esversion: 9').")
.test([
"void /./s;",
"void /./gs;",
"void /./sg;"
], { esversion: 8 });