/
no-undef.test.ts
183 lines (177 loc) · 4.01 KB
/
no-undef.test.ts
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import rule from 'eslint/lib/rules/no-undef';
import { RuleTester } from '../RuleTester';
const ruleTester = new RuleTester({
parserOptions: {
ecmaVersion: 6,
sourceType: 'module',
ecmaFeatures: {},
},
parser: '@typescript-eslint/parser',
});
ruleTester.run('no-undef', rule, {
valid: [
`
import Beemo from './Beemo';
import Driver from './Driver';
import Script from './Script';
import Context from './contexts/Context';
import DriverContext from './contexts/DriverContext';
import ScriptContext from './contexts/ScriptContext';
export { Context, Driver, DriverContext, Script, ScriptContext };
export * from './constants';
export * from './types';
export default Beemo;
`,
// https://github.com/eslint/typescript-eslint-parser/issues/471
`
class X {
field = {};
}
`,
// https://github.com/eslint/typescript-eslint-parser/issues/466
`
/*globals document, selector, NodeListOf, HTMLElement */
const links = document.querySelectorAll(selector) as NodeListOf<HTMLElement>;
`,
{
code: `
/*globals document, selector */
const links = document.querySelectorAll(selector) as NodeListOf<HTMLElement>;
`,
parserOptions: {
lib: ['dom'],
},
},
// https://github.com/eslint/typescript-eslint-parser/issues/437
`
interface Runnable {
run(): void;
toString(): string;
}
`,
// https://github.com/eslint/typescript-eslint-parser/issues/416
`
export type SomeThing = {
id: string;
};
`,
// https://github.com/typescript-eslint/typescript-eslint/issues/20
`
export abstract class Foo {}
export class FooBar extends Foo {}
`,
// https://github.com/typescript-eslint/typescript-eslint/issues/18
`
interface IteratorCallback<Subject, Key, Value> {
(this: Subject, value: Value, key: Key, subject: Subject): void | false;
}
function eachr<Value>(
subject: Array<Value>,
callback: IteratorCallback<typeof subject, number, Value>,
): typeof subject;
function eachr<Key, Value>(
subject: Map<Key, Value>,
callback: IteratorCallback<typeof subject, Key, Value>,
): typeof subject;
function eachr<Object extends object, Key extends keyof Object>(
subject: Object,
callback: IteratorCallback<Object, Key, Object[Key]>,
): Object;
function eachr<Object extends object, Key, Value>(
subject: Object | Array<Value> | Map<Key, Value>,
callback: IteratorCallback<typeof subject, Key, Value>,
): typeof subject {
return subject;
}
`,
// https://github.com/typescript-eslint/typescript-eslint/issues/18
`
function eachr<Key, Value>(subject: Map<Key, Value>): typeof subject;
`,
`
var a = { b: 3 };
var c = a?.b;
`,
`
var a = { b: { c: 3 } };
var d = a?.['b']?.c;
`,
`
var a = { b: 3 };
var c = {};
var d = (a || c)?.b;
`,
`
var a = { b: () => {} };
a?.b();
`,
// https://github.com/typescript-eslint/typescript-eslint/issues/2462
`
export default class Column {
isColumnString(column: unknown): column is string {
return typeof this.column === 'string';
}
}
`,
`
type T = string;
function predicate(arg: any): arg is T {
return typeof arg === 'string';
}
`,
`
function predicate(arg: any): asserts arg {
if (arg == null) {
throw 'oops';
}
}
`,
`
type T = string;
function predicate(arg: any): asserts arg is T {
if (typeof arg !== 'string') {
throw 'oops';
}
}
`,
// https://github.com/typescript-eslint/typescript-eslint/issues/2477
`
const x = 1 as const;
`,
],
invalid: [
{
code: 'a = 5;',
errors: [
{
messageId: 'undef',
data: {
name: 'a',
},
},
],
},
{
code: 'a?.b = 5;',
errors: [
{
messageId: 'undef',
data: {
name: 'a',
},
},
],
},
{
code: 'a()?.b = 5;',
errors: [
{
messageId: 'undef',
data: {
name: 'a',
},
},
],
},
],
});