/
prefer-top-level-await.mjs
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/
prefer-top-level-await.mjs
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import outdent from 'outdent';
import {getTester} from './utils/test.mjs';
const {test} = getTester(import.meta);
// Async IIFE
test.snapshot({
valid: [
'a()',
'a = async () => {}',
'(async function *() {})()',
outdent`
function foo() {
if (foo) {
(async () => {})()
}
}
`,
'await (async () => {})()',
],
invalid: [
'(async () => {})()',
'(async () => {})?.()',
'(async function() {})()',
'(async function() {}())',
'(async function run() {})()',
'(async function(c, d) {})(a, b)',
'if (foo) (async () => {})()',
outdent`
{
(async () => {})();
}
`,
'a = (async () => {})()',
'!async function() {}()',
'void async function() {}()',
'(async () => {})().catch(foo)',
],
});
// Promise
test.snapshot({
valid: [
'foo.then',
'await foo.then(bar)',
'await foo.then(bar).catch(bar)',
'await foo.then?.(bar)',
'await foo.then(bar)?.catch(bar)',
'await foo.then(bar)?.catch?.(bar)',
outdent`
class Example {
property = promise.then(bar)
}
`,
outdent`
const Example = class Example {
property = promise.then(bar)
}
`,
outdent`
class Example {
static {
promise.then(bar)
}
}
`,
outdent`
const Example = class Example {
static {
promise.then(bar)
}
}
`,
],
invalid: [
'foo.then(bar)',
'foo.then?.(bar)',
'foo?.then(bar)',
'foo.catch(() => process.exit(1))',
'foo.finally(bar)',
'foo.then(bar, baz)',
'foo.then(bar, baz).finally(qux)',
'(foo.then(bar, baz)).finally(qux)',
'(async () => {})().catch(() => process.exit(1))',
'(async function() {}()).finally(() => {})',
'for (const foo of bar) foo.then(bar)',
'foo?.then(bar).finally(qux)',
'foo.then().toString()',
'!foo.then()',
'foo.then(bar).then(baz)?.then(qux)',
'foo.then(bar).then(baz).then?.(qux)',
'foo.then(bar).catch(bar).finally(bar)',
],
});
// Identifier
test.snapshot({
valid: [
'foo()',
'foo.bar()',
outdent`
function foo() {
return async () => {};
}
foo()();
`,
outdent`
const [foo] = [async () => {}];
foo();
`,
outdent`
function foo() {}
foo();
`,
outdent`
async function * foo() {}
foo();
`,
outdent`
var foo = async () => {};
foo();
`,
outdent`
let foo = async () => {};
foo();
`,
outdent`
const foo = 1, bar = async () => {};
foo();
`,
outdent`
async function foo() {}
const bar = foo;
bar();
`,
{
code: outdent`
async function foo() {}
async function foo() {}
foo();
`,
parserOptions: {sourceType: 'script'},
},
{
code: outdent`
foo();
async function foo() {}
async function foo() {}
`,
parserOptions: {sourceType: 'script'},
},
outdent`
const program = {async run () {}};
program.run()
`,
outdent`
const program = {async run () {}};
const {run} = program;
run()
`,
outdent`
const foo = async () => {};
await foo();
`,
'for (const statement of statements) { statement() };',
],
invalid: [
outdent`
const foo = async () => {};
foo();
`,
outdent`
const foo = async () => {};
foo?.();
`,
outdent`
const foo = async () => {};
foo().then(foo);
`,
outdent`
const foo = async function () {}, bar = 1;
foo(bar);
`,
outdent`
foo();
async function foo() {}
`,
outdent`
const foo = async () => {};
if (true) {
alert();
} else {
foo();
}
`,
],
});
test.babel({
valid: [
'await foo',
'await foo()',
outdent`
try {
await run()
} catch {
process.exit(1)
}
`,
],
invalid: [],
});