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dot-notation.js
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dot-notation.js
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/**
* @fileoverview Tests for dot-notation rule.
* @author Josh Perez
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/dot-notation"),
{ RuleTester } = require("../../../lib/rule-tester");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
/**
* Quote a string in "double quotes" because it’s painful
* with a double-quoted string literal
* @param {string} str The string to quote
* @returns {string} `"${str}"`
*/
function q(str) {
return `"${str}"`;
}
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
ruleTester.run("dot-notation", rule, {
valid: [
"a.b;",
"a.b.c;",
"a['12'];",
"a[b];",
"a[0];",
{ code: "a.b.c;", options: [{ allowKeywords: false }] },
{ code: "a.arguments;", options: [{ allowKeywords: false }] },
{ code: "a.let;", options: [{ allowKeywords: false }] },
{ code: "a.yield;", options: [{ allowKeywords: false }] },
{ code: "a.eval;", options: [{ allowKeywords: false }] },
{ code: "a[0];", options: [{ allowKeywords: false }] },
{ code: "a['while'];", options: [{ allowKeywords: false }] },
{ code: "a['true'];", options: [{ allowKeywords: false }] },
{ code: "a['null'];", options: [{ allowKeywords: false }] },
{ code: "a[true];", options: [{ allowKeywords: false }] },
{ code: "a[null];", options: [{ allowKeywords: false }] },
{ code: "a.true;", options: [{ allowKeywords: true }] },
{ code: "a.null;", options: [{ allowKeywords: true }] },
{ code: "a['snake_case'];", options: [{ allowPattern: "^[a-z]+(_[a-z]+)+$" }] },
{ code: "a['lots_of_snake_case'];", options: [{ allowPattern: "^[a-z]+(_[a-z]+)+$" }] },
{ code: "a[`time${range}`];", parserOptions: { ecmaVersion: 6 } },
{ code: "a[`while`];", options: [{ allowKeywords: false }], parserOptions: { ecmaVersion: 6 } },
{ code: "a[`time range`];", parserOptions: { ecmaVersion: 6 } },
"a.true;",
"a.null;",
"a[undefined];",
"a[void 0];",
"a[b()];",
{ code: "a[/(?<zero>0)/];", parserOptions: { ecmaVersion: 2018 } },
{ code: "class C { foo() { this['#a'] } }", parserOptions: { ecmaVersion: 2022 } },
{
code: "class C { #in; foo() { this.#in; } }",
options: [{ allowKeywords: false }],
parserOptions: { ecmaVersion: 2022 }
}
],
invalid: [
{
code: "a.true;",
output: "a[\"true\"];",
options: [{ allowKeywords: false }],
errors: [{ messageId: "useBrackets", data: { key: "true" } }]
},
{
code: "a['true'];",
output: "a.true;",
errors: [{ messageId: "useDot", data: { key: q("true") } }]
},
{
code: "a[`time`];",
output: "a.time;",
parserOptions: { ecmaVersion: 6 },
errors: [{ messageId: "useDot", data: { key: "`time`" } }]
},
{
code: "a[null];",
output: "a.null;",
errors: [{ messageId: "useDot", data: { key: "null" } }]
},
{
code: "a[true];",
output: "a.true;",
errors: [{ messageId: "useDot", data: { key: "true" } }]
},
{
code: "a[false];",
output: "a.false;",
errors: [{ messageId: "useDot", data: { key: "false" } }]
},
{
code: "a['b'];",
output: "a.b;",
errors: [{ messageId: "useDot", data: { key: q("b") } }]
},
{
code: "a.b['c'];",
output: "a.b.c;",
errors: [{ messageId: "useDot", data: { key: q("c") } }]
},
{
code: "a['_dangle'];",
output: "a._dangle;",
options: [{ allowPattern: "^[a-z]+(_[a-z]+)+$" }],
errors: [{ messageId: "useDot", data: { key: q("_dangle") } }]
},
{
code: "a['SHOUT_CASE'];",
output: "a.SHOUT_CASE;",
options: [{ allowPattern: "^[a-z]+(_[a-z]+)+$" }],
errors: [{ messageId: "useDot", data: { key: q("SHOUT_CASE") } }]
},
{
code:
"a\n" +
" ['SHOUT_CASE'];",
output:
"a\n" +
" .SHOUT_CASE;",
errors: [{
messageId: "useDot",
data: { key: q("SHOUT_CASE") },
line: 2,
column: 4
}]
},
{
code:
"getResource()\n" +
" .then(function(){})\n" +
" [\"catch\"](function(){})\n" +
" .then(function(){})\n" +
" [\"catch\"](function(){});",
output:
"getResource()\n" +
" .then(function(){})\n" +
" .catch(function(){})\n" +
" .then(function(){})\n" +
" .catch(function(){});",
errors: [
{
messageId: "useDot",
data: { key: q("catch") },
line: 3,
column: 6
},
{
messageId: "useDot",
data: { key: q("catch") },
line: 5,
column: 6
}
]
},
{
code:
"foo\n" +
" .while;",
output:
"foo\n" +
" [\"while\"];",
options: [{ allowKeywords: false }],
errors: [{ messageId: "useBrackets", data: { key: "while" } }]
},
{
code: "foo[ /* comment */ 'bar' ]",
output: null, // Not fixed due to comment
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "foo[ 'bar' /* comment */ ]",
output: null, // Not fixed due to comment
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "foo[ 'bar' ];",
output: "foo.bar;",
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "foo. /* comment */ while",
output: null, // Not fixed due to comment
options: [{ allowKeywords: false }],
errors: [{ messageId: "useBrackets", data: { key: "while" } }]
},
{
code: "foo[('bar')]",
output: "foo.bar",
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "foo[(null)]",
output: "foo.null",
errors: [{ messageId: "useDot", data: { key: "null" } }]
},
{
code: "(foo)['bar']",
output: "(foo).bar",
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "1['toString']",
output: "1 .toString",
errors: [{ messageId: "useDot", data: { key: q("toString") } }]
},
{
code: "foo['bar']instanceof baz",
output: "foo.bar instanceof baz",
errors: [{ messageId: "useDot", data: { key: q("bar") } }]
},
{
code: "let.if()",
output: null, // `let["if"]()` is a syntax error because `let[` indicates a destructuring variable declaration
options: [{ allowKeywords: false }],
errors: [{ messageId: "useBrackets", data: { key: "if" } }]
},
{
code: "5['prop']",
output: "5 .prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "-5['prop']",
output: "-5 .prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "01['prop']",
output: "01.prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "01234567['prop']",
output: "01234567.prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "08['prop']",
output: "08 .prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "090['prop']",
output: "090 .prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "018['prop']",
output: "018 .prop",
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "5_000['prop']",
output: "5_000 .prop",
parserOptions: { ecmaVersion: 2021 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "5_000_00['prop']",
output: "5_000_00 .prop",
parserOptions: { ecmaVersion: 2021 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "5.000_000['prop']",
output: "5.000_000.prop",
parserOptions: { ecmaVersion: 2021 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "0b1010_1010['prop']",
output: "0b1010_1010.prop",
parserOptions: { ecmaVersion: 2021 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
// Optional chaining
{
code: "obj?.['prop']",
output: "obj?.prop",
parserOptions: { ecmaVersion: 2020 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "0?.['prop']",
output: "0?.prop",
parserOptions: { ecmaVersion: 2020 },
errors: [{ messageId: "useDot", data: { key: q("prop") } }]
},
{
code: "obj?.true",
output: "obj?.[\"true\"]",
options: [{ allowKeywords: false }],
parserOptions: { ecmaVersion: 2020 },
errors: [{ messageId: "useBrackets", data: { key: "true" } }]
},
{
code: "let?.true",
output: "let?.[\"true\"]",
options: [{ allowKeywords: false }],
parserOptions: { ecmaVersion: 2020 },
errors: [{ messageId: "useBrackets", data: { key: "true" } }]
}
]
});