/
no-default-export.js
166 lines (161 loc) · 3.68 KB
/
no-default-export.js
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import { test, testVersion } from '../utils';
import { RuleTester } from 'eslint';
const ruleTester = new RuleTester();
const rule = require('rules/no-default-export');
ruleTester.run('no-default-export', rule, {
valid: [
test({
code: `
export const foo = 'foo';
export const bar = 'bar';
`,
}),
test({
code: `
export const foo = 'foo';
export function bar() {};
`,
}),
test({
code: `export const foo = 'foo';`,
}),
test({
code: `
const foo = 'foo';
export { foo };
`,
}),
test({
code: `let foo, bar; export { foo, bar }`,
}),
test({
code: `export const { foo, bar } = item;`,
}),
test({
code: `export const { foo, bar: baz } = item;`,
}),
test({
code: `export const { foo: { bar, baz } } = item;`,
}),
test({
code: `
let item;
export const foo = item;
export { item };
`,
}),
test({
code: `export * from './foo';`,
}),
test({
code: `export const { foo } = { foo: "bar" };`,
}),
test({
code: `export const { foo: { bar } } = { foo: { bar: "baz" } };`,
}),
test({
code: 'export { a, b } from "foo.js"',
parser: require.resolve('babel-eslint'),
}),
// no exports at all
test({
code: `import * as foo from './foo';`,
}),
test({
code: `import foo from './foo';`,
}),
test({
code: `import {default as foo} from './foo';`,
}),
test({
code: `export type UserId = number;`,
parser: require.resolve('babel-eslint'),
}),
test({
code: 'export foo from "foo.js"',
parser: require.resolve('babel-eslint'),
}),
test({
code: `export Memory, { MemoryValue } from './Memory'`,
parser: require.resolve('babel-eslint'),
}),
],
invalid: [].concat(
testVersion('> 2', () => ({
code: 'export default function bar() {};',
errors: [
{
type: 'ExportDefaultDeclaration',
message: 'Prefer named exports.',
line: 1,
column: 8,
}
],
})),
testVersion('> 2', () => ({
code: `
export const foo = 'foo';
export default bar;`,
errors: [
{
type: 'ExportDefaultDeclaration',
message: 'Prefer named exports.',
line: 3,
column: 16,
}
],
})),
testVersion('> 2', () => ({
code: 'export default class Bar {};',
errors: [
{
type: 'ExportDefaultDeclaration',
message: 'Prefer named exports.',
line: 1,
column: 8,
}
],
})),
testVersion('> 2', () => ({
code: 'export default function() {};',
errors: [
{
type: 'ExportDefaultDeclaration',
message: 'Prefer named exports.',
line: 1,
column: 8,
}
],
})),
testVersion('> 2', () => ({
code: 'export default class {};',
errors: [
{
type: 'ExportDefaultDeclaration',
message: 'Prefer named exports.',
line: 1,
column: 8,
}
],
})),
test({
code: 'let foo; export { foo as default }',
errors: [
{
type: 'ExportNamedDeclaration',
message: 'Do not alias `foo` as `default`. Just export `foo` itself instead.',
}
],
}),
test({
code: 'export default from "foo.js"',
parser: require.resolve('babel-eslint'),
errors: [
{
type: 'ExportNamedDeclaration',
message: 'Prefer named exports.',
}
],
}),
),
});