/
prefer-spread.js
78 lines (68 loc) · 2.08 KB
/
prefer-spread.js
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/**
* @fileoverview Tests for prefer-spread rule.
* @author Toru Nagashima
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/prefer-spread");
const RuleTester = require("../../../lib/testers/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const errors = [{ message: "Use the spread operator instead of '.apply()'.", type: "CallExpression" }];
const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
ruleTester.run("prefer-spread", rule, {
valid: [
"foo.apply(obj, args);",
"obj.foo.apply(null, args);",
"obj.foo.apply(otherObj, args);",
"a.b(x, y).c.foo.apply(a.b(x, z).c, args);",
"a.b.foo.apply(a.b.c, args);",
// ignores non variadic.
"foo.apply(undefined, [1, 2]);",
"foo.apply(null, [1, 2]);",
"obj.foo.apply(obj, [1, 2]);",
// ignores computed property.
"var apply; foo[apply](null, args);",
// ignores incomplete things.
"foo.apply();",
"obj.foo.apply();",
"obj.foo.apply(obj, ...args)"
],
invalid: [
{
code: "foo.apply(undefined, args);",
errors
},
{
code: "foo.apply(void 0, args);",
errors
},
{
code: "foo.apply(null, args);",
errors
},
{
code: "obj.foo.apply(obj, args);",
errors
},
{
code: "a.b.c.foo.apply(a.b.c, args);",
errors
},
{
code: "a.b(x, y).c.foo.apply(a.b(x, y).c, args);",
errors
},
{
code: "[].concat.apply([ ], args);",
errors
},
{
code: "[].concat.apply([\n/*empty*/\n], args);",
errors
}
]
});