forked from eslint/eslint
/
function-paren-newline.js
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/
function-paren-newline.js
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/**
* @fileoverview enforce consistent line breaks inside function parentheses
* @author Teddy Katz
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/function-paren-newline");
const { RuleTester } = require("../../../lib/rule-tester");
const { unIndent } = require("../../_utils");
const fixtureParser = require("../../fixtures/fixture-parser");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const LEFT_MISSING_ERROR = { messageId: "expectedAfter", type: "Punctuator" };
const LEFT_UNEXPECTED_ERROR = { messageId: "unexpectedAfter", type: "Punctuator" };
const RIGHT_MISSING_ERROR = { messageId: "expectedBefore", type: "Punctuator" };
const RIGHT_UNEXPECTED_ERROR = { messageId: "unexpectedBefore", type: "Punctuator" };
const EXPECTED_BETWEEN = { messageId: "expectedBetween", type: "Identifier" };
const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
ruleTester.run("function-paren-newline", rule, {
valid: [
// multiline option (default)
"function baz(foo, bar) {}",
"(function(foo, bar) {});",
"(function baz(foo, bar) {});",
"(foo, bar) => {};",
"foo => {};",
"baz(foo, bar);",
"function baz() {}",
`
function baz(
foo,
bar
) {}
`,
`
(function(
foo,
bar
) {});
`,
`
(function baz(
foo,
bar
) {});
`,
`
(
foo,
bar
) => {};
`,
`
baz(
foo,
bar
);
`,
`
baz(\`foo
bar\`)
`,
"new Foo(bar, baz)",
"new Foo",
"new (Foo)",
`
(foo)
(bar)
`,
`
foo.map(value => {
return value;
})
`,
{
code: "function baz(foo, bar) {}",
options: ["multiline"]
},
{
code: "async (foo, bar) => {};",
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo,
bar
) => {};
`,
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(source)",
parserOptions: { ecmaVersion: 2020 }
},
{
code: "import(source\n + ext)",
parserOptions: { ecmaVersion: 2020 }
},
// multiline-arguments
{
code: "function baz(foo, bar) {}",
options: ["multiline-arguments"]
},
{
code: "function baz(foo) {}",
options: ["multiline-arguments"]
},
{
code: "(function(foo, bar) {});",
options: ["multiline-arguments"]
},
{
code: "(function(foo) {});",
options: ["multiline-arguments"]
},
{
code: "(function baz(foo, bar) {});",
options: ["multiline-arguments"]
},
{
code: "(function baz(foo) {});",
options: ["multiline-arguments"]
},
{
code: "(foo, bar) => {};",
options: ["multiline-arguments"]
},
{
code: "foo => {};",
options: ["multiline-arguments"]
},
{
code: "baz(foo, bar);",
options: ["multiline-arguments"]
},
{
code: "baz(foo);",
options: ["multiline-arguments"]
},
{
code: "function baz() {}",
options: ["multiline-arguments"]
},
{
code: `
function baz(
foo,
bar
) {}
`,
options: ["multiline-arguments"]
},
{
code: `
function baz(
foo
) {}
`,
options: ["multiline-arguments"]
},
{
code: `
(function(
foo,
bar
) {});
`,
options: ["multiline-arguments"]
},
{
code: `
(function(
foo
) {});
`,
options: ["multiline-arguments"]
},
{
code: `
(function baz(
foo,
bar
) {});
`,
options: ["multiline-arguments"]
},
{
code: `
(function baz(
foo
) {});
`,
options: ["multiline-arguments"]
},
{
code: `
(
foo,
bar
) => {};
`,
options: ["multiline-arguments"]
},
{
code: `
(
foo
) => {};
`,
options: ["multiline-arguments"]
},
{
code: `
baz(
foo,
bar
);
`,
options: ["multiline-arguments"]
},
{
code: `
baz(
foo
);
`,
options: ["multiline-arguments"]
},
{
code: `
baz(\`foo
bar\`)
`,
options: ["multiline-arguments"]
},
{
code: "new Foo(bar, baz)",
options: ["multiline-arguments"]
},
{
code: "new Foo(bar)",
options: ["multiline-arguments"]
},
{
code: "new Foo",
options: ["multiline-arguments"]
},
{
code: "new (Foo)",
options: ["multiline-arguments"]
},
{
code: "async (foo, bar) => {};",
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async (foo) => {};",
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo
) => {};
`,
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo,
bar
) => {};
`,
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(source)",
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "import(source\n + ext)",
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2020 }
},
{
code: `
(foo)
(bar)
`,
options: ["multiline-arguments"]
},
{
code: `
foo.map(value => {
return value;
})
`,
options: ["multiline-arguments"]
},
// always option
{
code: `
function baz(
foo,
bar
) {}
`,
options: ["always"]
},
{
code: `
(function(
foo,
bar
) {});
`,
options: ["always"]
},
{
code: `
(function baz(
foo,
bar
) {});
`,
options: ["always"]
},
{
code: `
(
foo,
bar
) => {};
`,
options: ["always"]
},
{
code: `
baz(
foo,
bar
);
`,
options: ["always"]
},
{
code: `
function baz(
) {}
`,
options: ["always"]
},
{
code: `
async (
foo
) => {};
`,
options: ["always"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo,
bar
) => {};
`,
options: ["always"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
options: ["always"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(\n source\n)",
options: ["always"],
parserOptions: { ecmaVersion: 2020 }
},
// never option
{
code: "function baz(foo, bar) {}",
options: ["never"]
},
{
code: "(function(foo, bar) {});",
options: ["never"]
},
{
code: "(function baz(foo, bar) {});",
options: ["never"]
},
{
code: "(foo, bar) => {};",
options: ["never"]
},
{
code: "baz(foo, bar);",
options: ["never"]
},
{
code: "function baz() {}",
options: ["never"]
},
{
code: "async (foo, bar) => {};",
options: ["never"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
options: ["never"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(source)",
options: ["never"],
parserOptions: { ecmaVersion: 2020 }
},
// minItems option
{
code: "function baz(foo, bar) {}",
options: [{ minItems: 3 }]
},
{
code: `
function baz(
foo, bar, qux
) {}
`,
options: [{ minItems: 3 }]
},
{
code: `
baz(
foo, bar, qux
);
`,
options: [{ minItems: 3 }]
},
{
code: "baz(foo, bar);",
options: [{ minItems: 3 }]
},
{
code: "async (foo, bar) => {};",
options: [{ minItems: 3 }],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo,
bar,
baz
) => {};
`,
options: [{ minItems: 3 }],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
options: [{ minItems: 3 }],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(source)",
options: [{ minItems: 3 }],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "import(\n source\n)",
options: [{ minItems: 1 }],
parserOptions: { ecmaVersion: 2020 }
},
// consistent option
{
code: "foo(bar, baz)",
options: ["consistent"]
},
{
code: `
foo(bar,
baz)
`,
options: ["consistent"]
},
{
code: `
foo(
bar, baz
)
`,
options: ["consistent"]
},
{
code: `
foo(
bar,
baz
)
`,
options: ["consistent"]
},
{
code: "async (foo, bar) => {};",
options: ["consistent"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "async foo => {};",
options: ["consistent"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (foo,
bar) => {};
`,
options: ["consistent"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo, bar
) => {};
`,
options: ["consistent"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: `
async (
foo,
bar
) => {};
`,
options: ["consistent"],
parserOptions: { ecmaVersion: 2017 }
},
{
code: "import(source)",
options: ["consistent"],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "import(\n source\n)",
options: ["consistent"],
parserOptions: { ecmaVersion: 2020 }
},
// https://github.com/eslint/eslint/issues/15091#issuecomment-975605821
{
code: unIndent`
const method6 = (
abc: number,
def: () => void,
): [
string,
() => void
] => [\`a\${abc}\`, def];
method6(3, () => {});
`,
options: ["multiline"],
parser: fixtureParser("function-paren-newline", "arrow-function-return-type")
}
],
invalid: [
// multiline option (default)
{
code: `
function baz(foo,
bar
) {}
`,
output: `
function baz(\nfoo,
bar
) {}
`,
errors: [LEFT_MISSING_ERROR]
},
{
code: `
(function(
foo,
bar) {})
`,
output: `
(function(
foo,
bar\n) {})
`,
errors: [RIGHT_MISSING_ERROR]
},
{
code: `
(function baz(foo,
bar) {})
`,
output: `
(function baz(\nfoo,
bar\n) {})
`,
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
baz(
foo, bar);
`,
output: `
baz(foo, bar);
`,
errors: [LEFT_UNEXPECTED_ERROR]
},
{
code: `
(foo, bar
) => {};
`,
output: `
(foo, bar) => {};
`,
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
foo, bar
) {}
`,
output: `
function baz(foo, bar) {}
`,
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
foo =
1
) {}
`,
output: `
function baz(foo =
1) {}
`,
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
) {}
`,
output: `
function baz() {}
`,
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
new Foo(bar,
baz);
`,
output: `
new Foo(\nbar,
baz\n);
`,
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
function baz(/* not fixed due to comment */
foo) {}
`,
output: null,
errors: [LEFT_UNEXPECTED_ERROR]
},
{
code: `
function baz(foo
/* not fixed due to comment */) {}
`,
output: null,
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
async (
foo, bar
) => {};
`,
output: `
async (foo, bar) => {};
`,
parserOptions: { ecmaVersion: 2017 },
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
async (foo, bar
) => {};
`,
output: `
async (foo, bar) => {};
`,
parserOptions: { ecmaVersion: 2017 },
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
async (foo,
bar) => {};
`,
output: `
async (\nfoo,
bar\n) => {};
`,
parserOptions: { ecmaVersion: 2017 },
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
async (
foo,
bar) => {};
`,
output: `
async (
foo,
bar\n) => {};
`,
parserOptions: { ecmaVersion: 2017 },
errors: [RIGHT_MISSING_ERROR]
},
{
code: "import(\n source\n)",
output: "import(source)",
parserOptions: { ecmaVersion: 2020 },
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
// multiline-arguments
{
code: `
function baz(foo,
bar
) {}
`,
output: `
function baz(\nfoo,
bar
) {}
`,
options: ["multiline-arguments"],
errors: [LEFT_MISSING_ERROR]
},
{
code: `
(function(
foo,
bar) {})
`,
output: `
(function(
foo,
bar\n) {})
`,
options: ["multiline-arguments"],
errors: [RIGHT_MISSING_ERROR]
},
{
code: `
(function baz(foo,
bar) {})
`,
output: `
(function baz(\nfoo,
bar\n) {})
`,
options: ["multiline-arguments"],
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
baz(
foo, bar);
`,
output: `
baz(foo, bar);
`,
options: ["multiline-arguments"],
errors: [LEFT_UNEXPECTED_ERROR]
},
{
code: `
(foo, bar
) => {};
`,
output: `
(foo, bar) => {};
`,
options: ["multiline-arguments"],
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
foo, bar
) {}
`,
output: `
function baz(foo, bar) {}
`,
options: ["multiline-arguments"],
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
) {}
`,
output: `
function baz() {}
`,
options: ["multiline-arguments"],
errors: [LEFT_UNEXPECTED_ERROR, RIGHT_UNEXPECTED_ERROR]
},
{
code: `
new Foo(bar,
baz);
`,
output: `
new Foo(\nbar,
baz\n);
`,
options: ["multiline-arguments"],
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
function baz(/* not fixed due to comment */
foo) {}
`,
output: `
function baz(/* not fixed due to comment */
foo\n) {}
`,
options: ["multiline-arguments"],
errors: [RIGHT_MISSING_ERROR]
},
{
code: `
function baz(foo
/* not fixed due to comment */) {}
`,
output: null,
options: ["multiline-arguments"],
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
function baz(
qwe,
foo, bar
) {}
`,
output: `
function baz(
qwe,
foo, \nbar
) {}
`,
options: ["multiline-arguments"],
errors: [EXPECTED_BETWEEN]
},
{
code: `
function baz(
qwe, foo,
bar
) {}
`,
output: `
function baz(
qwe, \nfoo,
bar
) {}
`,
options: ["multiline-arguments"],
errors: [EXPECTED_BETWEEN]
},
{
code: `
function baz(qwe, foo,
bar) {}
`,
output: `
function baz(\nqwe, \nfoo,
bar\n) {}
`,
options: ["multiline-arguments"],
errors: [LEFT_MISSING_ERROR, EXPECTED_BETWEEN, RIGHT_MISSING_ERROR]
},
{
code: `
baz(
foo);
`,
output: `
baz(
foo\n);
`,
options: ["multiline-arguments"],
errors: [RIGHT_MISSING_ERROR]
},
{
code: `
baz(foo
);
`,
output: `
baz(foo);
`,
options: ["multiline-arguments"],
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
async (foo, bar
) => {};
`,
output: `
async (foo, bar) => {};
`,
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 },
errors: [RIGHT_UNEXPECTED_ERROR]
},
{
code: `
async (foo,
bar) => {};
`,
output: `
async (\nfoo,
bar\n) => {};
`,
options: ["multiline-arguments"],
parserOptions: { ecmaVersion: 2017 },
errors: [LEFT_MISSING_ERROR, RIGHT_MISSING_ERROR]
},
{
code: `
async (
foo,
bar) => {};