eslint/tests/lib/rules/no-underscore-dangle.js

   1 /**
   2  * @fileoverview Test for no-underscore-dangle rule
   3  * @author Matt DuVall <http://www.mattduvall.com>
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/no-underscore-dangle"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("no-underscore-dangle", rule, {
  22     valid: [
  23         "var foo_bar = 1;",
  24         "function foo_bar() {}",
  25         "foo.bar.__proto__;",
  26         "console.log(__filename); console.log(__dirname);",
  27         "var _ = require('underscore');",
  28         "var a = b._;",
  29         { code: "export default function() {}", parserOptions: { ecmaVersion: 6, sourceType: "module" } },
  30         { code: "var _foo = 1", options: [{ allow: ["_foo"] }] },
  31         { code: "var __proto__ = 1;", options: [{ allow: ["__proto__"] }] },
  32         { code: "foo._bar;", options: [{ allow: ["_bar"] }] },
  33         { code: "function _foo() {}", options: [{ allow: ["_foo"] }] },
  34         { code: "this._bar;", options: [{ allowAfterThis: true }] },
  35         { code: "class foo { constructor() { super._bar; } }", options: [{ allowAfterSuper: true }], parserOptions: { ecmaVersion: 6 } },
  36         { code: "class foo { _onClick() { } }", parserOptions: { ecmaVersion: 6 } },
  37         { code: "class foo { onClick_() { } }", parserOptions: { ecmaVersion: 6 } },
  38         { code: "const o = { _onClick() { } }", parserOptions: { ecmaVersion: 6 } },
  39         { code: "const o = { onClick_() { } }", parserOptions: { ecmaVersion: 6 } },
  40         { code: "const o = { _onClick() { } }", options: [{ allow: ["_onClick"], enforceInMethodNames: true }], parserOptions: { ecmaVersion: 6 } },
  41         { code: "const o = { _foo: 'bar' }", parserOptions: { ecmaVersion: 6 } },
  42         { code: "const o = { foo_: 'bar' }", parserOptions: { ecmaVersion: 6 } },
  43         { code: "this.constructor._bar", options: [{ allowAfterThisConstructor: true }] }
  44     ],
  45     invalid: [
  46         { code: "var _foo = 1", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_foo" }, type: "VariableDeclarator" }] },
  47         { code: "var foo_ = 1", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "foo_" }, type: "VariableDeclarator" }] },
  48         { code: "function _foo() {}", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_foo" }, type: "FunctionDeclaration" }] },
  49         { code: "function foo_() {}", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "foo_" }, type: "FunctionDeclaration" }] },
  50         { code: "var __proto__ = 1;", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "__proto__" }, type: "VariableDeclarator" }] },
  51         { code: "foo._bar;", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_bar" }, type: "MemberExpression" }] },
  52         { code: "this._prop;", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_prop" }, type: "MemberExpression" }] },
  53         { code: "class foo { constructor() { super._prop; } }", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_prop" }, type: "MemberExpression" }] },
  54         { code: "class foo { constructor() { this._prop; } }", options: [{ allowAfterSuper: true }], parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_prop" }, type: "MemberExpression" }] },
  55         { code: "class foo { _onClick() { } }", options: [{ enforceInMethodNames: true }], parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_onClick" }, type: "MethodDefinition" }] },
  56         { code: "class foo { onClick_() { } }", options: [{ enforceInMethodNames: true }], parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "onClick_" }, type: "MethodDefinition" }] },
  57         { code: "const o = { _onClick() { } }", options: [{ enforceInMethodNames: true }], parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_onClick" }, type: "Property" }] },
  58         { code: "const o = { onClick_() { } }", options: [{ enforceInMethodNames: true }], parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "onClick_" }, type: "Property" }] },
  59         { code: "this.constructor._bar", errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_bar" }, type: "MemberExpression" }] },
  60         { code: "foo.constructor._bar", options: [{ allowAfterThisConstructor: true }], errors: [{ messageId: "unexpectedUnderscore", data: { identifier: "_bar" }, type: "MemberExpression" }] }
  61     ]
  62 });