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no-regex-spaces.js
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no-regex-spaces.js
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/**
* @fileoverview Tests for regex-spaces rule.
* @author Matt DuVall <http://www.mattduvall.com/>
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/no-regex-spaces"),
{ RuleTester } = require("../../../lib/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
ruleTester.run("no-regex-spaces", rule, {
valid: [
"var foo = /foo/;",
"var foo = RegExp('foo')",
"var foo = / /;",
"var foo = RegExp(' ')",
"var foo = / a b c d /;",
"var foo = /bar {3}baz/g;",
"var foo = RegExp('bar {3}baz', 'g')",
"var foo = new RegExp('bar {3}baz')",
"var foo = /bar\t\t\tbaz/;",
"var foo = RegExp('bar\t\t\tbaz');",
"var foo = new RegExp('bar\t\t\tbaz');",
"var RegExp = function() {}; var foo = new RegExp('bar baz');",
"var RegExp = function() {}; var foo = RegExp('bar baz');",
"var foo = / +/;",
"var foo = / ?/;",
"var foo = / */;",
"var foo = / {2}/;",
// don't report if there are no consecutive spaces in the source code
"var foo = /bar \\ baz/;",
"var foo = /bar\\ \\ baz/;",
"var foo = /bar \\u0020 baz/;",
"var foo = /bar\\u0020\\u0020baz/;",
"var foo = new RegExp('bar \\ baz')",
"var foo = new RegExp('bar\\ \\ baz')",
"var foo = new RegExp('bar \\\\ baz')",
"var foo = new RegExp('bar \\u0020 baz')",
"var foo = new RegExp('bar\\u0020\\u0020baz')",
"var foo = new RegExp('bar \\\\u0020 baz')",
// don't report spaces in character classes
"var foo = /[ ]/;",
"var foo = /[ ]/;",
"var foo = / [ ] /;",
"var foo = / [ ] [ ] /;",
"var foo = new RegExp('[ ]');",
"var foo = new RegExp('[ ]');",
"var foo = new RegExp(' [ ] ');",
"var foo = RegExp(' [ ] [ ] ');",
"var foo = new RegExp(' \\[ ');",
"var foo = new RegExp(' \\[ \\] ');",
// ES2024
{ code: "var foo = / {2}/v;", parserOptions: { ecmaVersion: 2024 } },
{ code: "var foo = /[\\q{ }]/v;", parserOptions: { ecmaVersion: 2024 } },
// don't report invalid regex
"var foo = new RegExp('[ ');",
"var foo = new RegExp('{ ', 'u');",
// don't report if flags cannot be determined
"new RegExp(' ', flags)",
"new RegExp('[[abc] ]', flags + 'v')",
"new RegExp('[[abc]\\\\q{ }]', flags + 'v')"
],
invalid: [
{
code: "var foo = /bar baz/;",
output: "var foo = /bar {2}baz/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = /bar baz/;",
output: "var foo = /bar {4}baz/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "Literal"
}
]
},
{
code: "var foo = / a b c d /;",
output: "var foo = / a b {2}c d /;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = RegExp(' a b c d ');",
output: "var foo = RegExp(' a b c d {2}');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "CallExpression"
}
]
},
{
code: "var foo = RegExp('bar baz');",
output: "var foo = RegExp('bar {4}baz');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "CallExpression"
}
]
},
{
code: "var foo = new RegExp('bar baz');",
output: "var foo = new RegExp('bar {4}baz');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "NewExpression"
}
]
},
{
// `RegExp` is not shadowed in the scope where it's called
code: "{ let RegExp = function() {}; } var foo = RegExp('bar baz');",
output: "{ let RegExp = function() {}; } var foo = RegExp('bar {4}baz');",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "CallExpression"
}
]
},
{
code: "var foo = /bar {3}baz/;",
output: "var foo = /bar {2} {3}baz/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = /bar ?baz/;",
output: "var foo = /bar {3} ?baz/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "3" },
type: "Literal"
}
]
},
{
code: "var foo = new RegExp('bar *baz')",
output: "var foo = new RegExp('bar {2} *baz')",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "NewExpression"
}
]
},
{
code: "var foo = RegExp('bar +baz')",
output: "var foo = RegExp('bar {2} +baz')",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "CallExpression"
}
]
},
{
code: "var foo = new RegExp('bar ');",
output: "var foo = new RegExp('bar {4}');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "NewExpression"
}
]
},
{
code: "var foo = /bar\\ baz/;",
output: "var foo = /bar\\ {2}baz/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = /[ ] /;",
output: "var foo = /[ ] {2}/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = / [ ] /;",
output: "var foo = / {2}[ ] /;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = new RegExp('[ ] ');",
output: "var foo = new RegExp('[ ] {2}');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "NewExpression"
}
]
},
{
code: "var foo = RegExp(' [ ]');",
output: "var foo = RegExp(' {2}[ ]');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "CallExpression"
}
]
},
{
code: "var foo = /\\[ /;",
output: "var foo = /\\[ {2}/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = /\\[ \\]/;",
output: "var foo = /\\[ {2}\\]/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = /(?: )/;",
output: "var foo = /(?: {2})/;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = RegExp('^foo(?= )');",
output: "var foo = RegExp('^foo(?= {3})');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "3" },
type: "CallExpression"
}
]
},
{
code: "var foo = /\\ /",
output: "var foo = /\\ {2}/",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
{
code: "var foo = / \\ /",
output: "var foo = / \\ {2}/",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
// report only the first occurrence of consecutive spaces
{
code: "var foo = / foo /;",
output: "var foo = / {2}foo /;",
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "Literal"
}
]
},
// don't fix strings with escape sequences
{
code: "var foo = new RegExp('\\\\d ')",
output: null,
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "NewExpression"
}
]
},
{
code: "var foo = RegExp('\\u0041 ')",
output: null,
errors: [
{
messageId: "multipleSpaces",
data: { length: "3" },
type: "CallExpression"
}
]
},
{
code: "var foo = new RegExp('\\\\[ \\\\]');",
output: null,
errors: [
{
messageId: "multipleSpaces",
data: { length: "2" },
type: "NewExpression"
}
]
},
// ES2024
{
code: "var foo = /[[ ] ] /v;",
output: "var foo = /[[ ] ] {4}/v;",
parserOptions: {
ecmaVersion: 2024
},
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "Literal"
}
]
},
{
code: "var foo = new RegExp('[[ ] ] ', 'v');",
output: "var foo = new RegExp('[[ ] ] {4}', 'v');",
errors: [
{
messageId: "multipleSpaces",
data: { length: "4" },
type: "NewExpression"
}
]
}
]
});