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/
id-length.js
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/
id-length.js
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/**
* @fileoverview Tests for id-length rule.
* @author Burak Yigit Kaya
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/id-length"),
{ RuleTester } = require("../../../lib/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
const tooShortError = { messageId: "tooShort", type: "Identifier" };
const tooShortErrorPrivate = { messageId: "tooShortPrivate", type: "PrivateIdentifier" };
const tooLongError = { messageId: "tooLong", type: "Identifier" };
const tooLongErrorPrivate = { messageId: "tooLongPrivate", type: "PrivateIdentifier" };
ruleTester.run("id-length", rule, {
valid: [
"var xyz;",
"var xy = 1;",
"function xyz() {};",
"function xyz(abc, de) {};",
"var obj = { abc: 1, de: 2 };",
"var obj = { 'a': 1, bc: 2 };",
"var obj = {}; obj['a'] = 2;",
"abc = d;",
"try { blah(); } catch (err) { /* pass */ }",
"var handler = function ($e) {};",
"var _a = 2",
"var _ad$$ = new $;",
"var xyz = new ΣΣ();",
"unrelatedExpressionThatNeedsToBeIgnored();",
"var obj = { 'a': 1, bc: 2 }; obj.tk = obj.a;",
"var query = location.query.q || '';",
"var query = location.query.q ? location.query.q : ''",
{ code: "let {a: foo} = bar;", parserOptions: { ecmaVersion: 6 } },
{ code: "let foo = { [a]: 1 };", parserOptions: { ecmaVersion: 6 } },
{ code: "let foo = { [a + b]: 1 };", parserOptions: { ecmaVersion: 6 } },
{ code: "var x = Foo(42)", options: [{ min: 1 }] },
{ code: "var x = Foo(42)", options: [{ min: 0 }] },
{ code: "foo.$x = Foo(42)", options: [{ min: 1 }] },
{ code: "var lalala = Foo(42)", options: [{ max: 6 }] },
{ code: "for (var q, h=0; h < 10; h++) { console.log(h); q++; }", options: [{ exceptions: ["h", "q"] }] },
{ code: "(num) => { num * num };", parserOptions: { ecmaVersion: 6 } },
{ code: "function foo(num = 0) { }", parserOptions: { ecmaVersion: 6 } },
{ code: "class MyClass { }", parserOptions: { ecmaVersion: 6 } },
{ code: "class Foo { method() {} }", parserOptions: { ecmaVersion: 6 } },
{ code: "function foo(...args) { }", parserOptions: { ecmaVersion: 6 } },
{ code: "var { prop } = {};", parserOptions: { ecmaVersion: 6 } },
{ code: "var { [a]: prop } = {};", parserOptions: { ecmaVersion: 6 } },
{ code: "var { a: foo } = {};", options: [{ min: 3 }], parserOptions: { ecmaVersion: 6 } },
{ code: "var { prop: foo } = {};", options: [{ max: 3 }], parserOptions: { ecmaVersion: 6 } },
{ code: "var { longName: foo } = {};", options: [{ min: 3, max: 5 }], parserOptions: { ecmaVersion: 6 } },
{ code: "var { foo: a } = {};", options: [{ exceptions: ["a"] }], parserOptions: { ecmaVersion: 6 } },
{ code: "var { a: { b: { c: longName } } } = {};", parserOptions: { ecmaVersion: 6 } },
{ code: "({ a: obj.x.y.z } = {});", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "import something from 'y';", parserOptions: { ecmaVersion: 6, sourceType: "module" } },
{ code: "export var num = 0;", parserOptions: { ecmaVersion: 6, sourceType: "module" } },
{ code: "({ prop: obj.x.y.something } = {});", parserOptions: { ecmaVersion: 6 } },
{ code: "({ prop: obj.longName } = {});", parserOptions: { ecmaVersion: 6 } },
{ code: "var obj = { a: 1, bc: 2 };", options: [{ properties: "never" }] },
{ code: "var obj = { [a]: 2 };", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "var obj = {}; obj.a = 1; obj.bc = 2;", options: [{ properties: "never" }] },
{ code: "({ prop: obj.x } = {});", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "var obj = { aaaaa: 1 };", options: [{ max: 4, properties: "never" }] },
{ code: "var obj = {}; obj.aaaaa = 1;", options: [{ max: 4, properties: "never" }] },
{ code: "({ a: obj.x.y.z } = {});", options: [{ max: 4, properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "({ prop: obj.xxxxx } = {});", options: [{ max: 4, properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "var arr = [i,j,f,b]", parserOptions: { ecmaVersion: 6 } },
{ code: "function foo([arr]) {}", parserOptions: { ecmaVersion: 6 } },
{ code: "var {x} = foo;", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "var {x, y: {z}} = foo;", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
{ code: "let foo = { [a]: 1 };", options: [{ properties: "always" }], parserOptions: { ecmaVersion: 6 } },
{ code: "let foo = { [a + b]: 1 };", options: [{ properties: "always" }], parserOptions: { ecmaVersion: 6 } },
{ code: "function BEFORE_send() {};", options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_"] }] },
{ code: "function BEFORE_send() {};", options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_", "send$"] }] },
{ code: "function BEFORE_send() {};", options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_", "^A", "^Z"] }] },
{ code: "function BEFORE_send() {};", options: [{ min: 3, max: 5, exceptionPatterns: ["^A", "^BEFORE_", "^Z"] }] },
{ code: "var x = 1 ;", options: [{ min: 3, max: 5, exceptionPatterns: ["[x-z]"] }] },
// Class Fields
{
code: "class Foo { #xyz() {} }",
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class Foo { xyz = 1 }",
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class Foo { #xyz = 1 }",
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class Foo { #abc() {} }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class Foo { abc = 1 }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class Foo { #abc = 1 }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 }
},
// Identifier consisting of two code units
{
code: "var 𠮟 = 2",
options: [{ min: 1, max: 1 }],
parserOptions: { ecmaVersion: 6 }
},
{
code: "var 葛󠄀 = 2", // 2 code points but only 1 grapheme
options: [{ min: 1, max: 1 }],
parserOptions: { ecmaVersion: 6 }
},
{
code: "var a = { 𐌘: 1 };",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "(𐌘) => { 𐌘 * 𐌘 };",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "class 𠮟 { }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "class F { 𐌘() {} }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "class F { #𐌘() {} }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 2022
}
},
{
code: "class F { 𐌘 = 1 }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 2022
}
},
{
code: "class F { #𐌘 = 1 }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 2022
}
},
{
code: "function f(...𐌘) { }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "function f([𐌘]) { }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "var [ 𐌘 ] = a;",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "var { p: [𐌘]} = {};",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "function f({𐌘}) { }",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "var { 𐌘 } = {};",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "var { p: 𐌘} = {};",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
},
{
code: "({ prop: o.𐌘 } = {});",
options: [{ min: 1, max: 1 }],
parserOptions: {
ecmaVersion: 6
}
}
],
invalid: [
{ code: "var x = 1;", errors: [tooShortError] },
{ code: "var x;", errors: [tooShortError] },
{ code: "obj.e = document.body;", errors: [tooShortError] },
{ code: "function x() {};", errors: [tooShortError] },
{ code: "function xyz(a) {};", errors: [tooShortError] },
{ code: "var obj = { a: 1, bc: 2 };", errors: [tooShortError] },
{ code: "try { blah(); } catch (e) { /* pass */ }", errors: [tooShortError] },
{ code: "var handler = function (e) {};", errors: [tooShortError] },
{ code: "for (var i=0; i < 10; i++) { console.log(i); }", errors: [tooShortError] },
{ code: "var j=0; while (j > -10) { console.log(--j); }", errors: [tooShortError] },
{ code: "var [i] = arr;", parserOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
{ code: "var [,i,a] = arr;", parserOptions: { ecmaVersion: 6 }, errors: [tooShortError, tooShortError] },
{ code: "function foo([a]) {}", parserOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
{
code: "var _$xt_$ = Foo(42)",
options: [{ min: 2, max: 4 }],
errors: [
tooLongError
]
},
{
code: "var _$x$_t$ = Foo(42)",
options: [{ min: 2, max: 4 }],
errors: [
tooLongError
]
},
{
code: "var toString;",
options: [{ max: 5 }],
errors: [
tooLongError
]
},
{
code: "(a) => { a * a };",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo(x = 0) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "class x { }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "class Foo { x() {} }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo(...x) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo({x}) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo({x: a}) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "a", min: 2 },
type: "Identifier"
}
]
},
{
code: "function foo({x: a, longName}) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo({ longName: a }) {}",
options: [{ min: 3, max: 5 }],
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function foo({ prop: longName }) {};",
options: [{ min: 3, max: 5 }],
parserOptions: { ecmaVersion: 6 },
errors: [
tooLongError
]
},
{
code: "function foo({ a: b }) {};",
options: [{ exceptions: ["a"] }],
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "b", min: 2 },
line: 1,
column: 19,
type: "Identifier"
}
]
},
{
code: "var hasOwnProperty;",
options: [{ max: 10, exceptions: [] }],
errors: [
{
messageId: "tooLong",
data: { name: "hasOwnProperty", max: 10 },
line: 1,
column: 5,
type: "Identifier"
}
]
},
{
code: "function foo({ a: { b: { c: d, e } } }) { }",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "d", min: 2 },
line: 1,
column: 29,
type: "Identifier"
},
{
messageId: "tooShort",
data: { name: "e", min: 2 },
line: 1,
column: 32,
type: "Identifier"
}
]
},
{
code: "var { x} = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { x: a} = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "a", min: 2 },
type: "Identifier"
}
]
},
{
code: "var { a: a} = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { prop: a } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { longName: a } = {};",
options: [{ min: 3, max: 5 }],
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { prop: [x] } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { prop: [[x]] } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var { prop: longName } = {};",
options: [{ min: 3, max: 5 }],
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooLong",
data: { name: "longName", max: 5 },
line: 1,
column: 13,
type: "Identifier"
}
]
},
{
code: "var { x: a} = {};",
options: [{ exceptions: ["x"] }],
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "a", min: 2 },
line: 1,
column: 10,
type: "Identifier"
}
]
},
{
code: "var { a: { b: { c: d } } } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "d", min: 2 },
line: 1,
column: 20,
type: "Identifier"
}
]
},
{
code: "var { a: { b: { c: d, e } } } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "d", min: 2 },
line: 1,
column: 20,
type: "Identifier"
},
{
messageId: "tooShort",
data: { name: "e", min: 2 },
line: 1,
column: 23,
type: "Identifier"
}
]
},
{
code: "var { a: { b: { c, e: longName } } } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "c", min: 2 },
line: 1,
column: 17,
type: "Identifier"
}
]
},
{
code: "var { a: { b: { c: d, e: longName } } } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "d", min: 2 },
line: 1,
column: 20,
type: "Identifier"
}
]
},
{
code: "var { a, b: { c: d, e: longName } } = {};",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "a", min: 2 },
line: 1,
column: 7,
type: "Identifier"
},
{
messageId: "tooShort",
data: { name: "d", min: 2 },
line: 1,
column: 18,
type: "Identifier"
}
]
},
{
code: "import x from 'y';",
parserOptions: { ecmaVersion: 6, sourceType: "module" },
errors: [
tooShortError
]
},
{
code: "export var x = 0;",
parserOptions: { ecmaVersion: 6, sourceType: "module" },
errors: [
tooShortError
]
},
{
code: "({ a: obj.x.y.z } = {});",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "z", min: 2 },
line: 1,
column: 15,
type: "Identifier"
}
]
},
{
code: "({ prop: obj.x } = {});",
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "x", min: 2 },
line: 1,
column: 14,
type: "Identifier"
}
]
},
{ code: "var x = 1;", options: [{ properties: "never" }], errors: [tooShortError] },
{
code: "var {prop: x} = foo;",
options: [{ properties: "never" }],
parserOptions: { ecmaVersion: 6 },
errors: [
{
messageId: "tooShort",
data: { name: "x", min: 2 },
line: 1,
column: 12,
type: "Identifier"
}
]
},
{
code: "var foo = {x: prop};",
options: [{ properties: "always" }],
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "function BEFORE_send() {};",
options: [{ min: 3, max: 5 }],
errors: [
tooLongError
]
},
{
code: "function NOTMATCHED_send() {};",
options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_"] }],
errors: [
tooLongError
]
},
{
code: "function N() {};",
options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_"] }],
errors: [
tooShortError
]
},
// Class Fields
{
code: "class Foo { #x() {} }",
parserOptions: { ecmaVersion: 2022 },
errors: [
tooShortErrorPrivate
]
},
{
code: "class Foo { x = 1 }",
parserOptions: { ecmaVersion: 2022 },
errors: [
tooShortError
]
},
{
code: "class Foo { #x = 1 }",
parserOptions: { ecmaVersion: 2022 },
errors: [
tooShortErrorPrivate
]
},
{
code: "class Foo { #abcdefg() {} }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 },
errors: [
tooLongErrorPrivate
]
},
{
code: "class Foo { abcdefg = 1 }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 },
errors: [
tooLongError
]
},
{
code: "class Foo { #abcdefg = 1 }",
options: [{ max: 3 }],
parserOptions: { ecmaVersion: 2022 },
errors: [
tooLongErrorPrivate
]
},
// Identifier consisting of two code units
{
code: "var 𠮟 = 2",
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var 葛󠄀 = 2", // 2 code points but only 1 grapheme
parserOptions: { ecmaVersion: 6 },
errors: [
tooShortError
]
},
{
code: "var myObj = { 𐌘: 1 };",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "(𐌘) => { 𐌘 * 𐌘 };",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "class 𠮟 { }",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "class Foo { 𐌘() {} }",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "class Foo1 { #𐌘() {} }",
parserOptions: {
ecmaVersion: 2022
},
errors: [
tooShortErrorPrivate
]
},
{
code: "class Foo2 { 𐌘 = 1 }",
parserOptions: {
ecmaVersion: 2022
},
errors: [
tooShortError
]
},
{
code: "class Foo3 { #𐌘 = 1 }",
parserOptions: {
ecmaVersion: 2022
},
errors: [
tooShortErrorPrivate
]
},
{
code: "function foo1(...𐌘) { }",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "function foo([𐌘]) { }",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "var [ 𐌘 ] = arr;",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "var { prop: [𐌘]} = {};",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "function foo({𐌘}) { }",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "var { 𐌘 } = {};",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "var { prop: 𐌘} = {};",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
},
{
code: "({ prop: obj.𐌘 } = {});",
parserOptions: {
ecmaVersion: 6
},
errors: [
tooShortError
]
}
]
});