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no-unused-labels.js
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no-unused-labels.js
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/**
* @fileoverview Tests for no-unused-labels rule.
* @author Toru Nagashima
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/no-unused-labels"),
RuleTester = require("../../../lib/testers/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
ruleTester.run("no-unused-labels", rule, {
valid: [
"A: break A;",
"A: { foo(); break A; bar(); }",
"A: if (a) { foo(); if (b) break A; bar(); }",
"A: for (var i = 0; i < 10; ++i) { foo(); if (a) break A; bar(); }",
"A: for (var i = 0; i < 10; ++i) { foo(); if (a) continue A; bar(); }",
"A: { B: break B; C: for (var i = 0; i < 10; ++i) { foo(); if (a) break A; if (c) continue C; bar(); } }",
"A: { var A = 0; console.log(A); break A; console.log(A); }"
],
invalid: [
{
code: "A: var foo = 0;",
output: "var foo = 0;",
errors: [{ messageId: "unused" }]
},
{
code: "A: { foo(); bar(); }",
output: "{ foo(); bar(); }",
errors: [{ messageId: "unused" }]
},
{
code: "A: if (a) { foo(); bar(); }",
output: "if (a) { foo(); bar(); }",
errors: [{ messageId: "unused" }]
},
{
code: "A: for (var i = 0; i < 10; ++i) { foo(); if (a) break; bar(); }",
output: "for (var i = 0; i < 10; ++i) { foo(); if (a) break; bar(); }",
errors: [{ messageId: "unused" }]
},
{
code: "A: for (var i = 0; i < 10; ++i) { foo(); if (a) continue; bar(); }",
output: "for (var i = 0; i < 10; ++i) { foo(); if (a) continue; bar(); }",
errors: [{ messageId: "unused" }]
},
{
code: "A: for (var i = 0; i < 10; ++i) { B: break A; }",
output: "A: for (var i = 0; i < 10; ++i) { break A; }",
errors: [{ messageId: "unused", data: { name: "B" } }]
},
{
code: "A: { var A = 0; console.log(A); }",
output: "{ var A = 0; console.log(A); }",
errors: [{ messageId: "unused" }]
},
{
code: "A: /* comment */ foo",
output: null,
errors: [{ messageId: "unused" }]
},
{
code: "A /* comment */: foo",
output: null,
errors: [{ messageId: "unused" }]
}
/*
* Below is fatal errors.
* "A: break B",
* "A: function foo() { break A; }",
* "A: class Foo { foo() { break A; } }",
* "A: { A: { break A; } }"
*/
]
});