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prefer-to-be-undefined.test.js
42 lines (39 loc) · 1.35 KB
/
prefer-to-be-undefined.test.js
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import { RuleTester } from 'eslint';
import rule from '../prefer-to-be-undefined';
const ruleTester = new RuleTester();
ruleTester.run('prefer-to-be-undefined', rule, {
valid: [
'expect(undefined).toBeUndefined();',
'expect(true).not.toBeUndefined();',
'expect({}).toEqual({});',
'expect(null).toEqual(null);',
'expect(something).toBe(somethingElse)',
'expect(something).toEqual(somethingElse)',
'expect(something).not.toBe(somethingElse)',
'expect(something).not.toEqual(somethingElse)',
'expect(undefined).toBe',
'expect("something");',
],
invalid: [
{
code: 'expect(undefined).toBe(undefined);',
errors: [{ messageId: 'useToBeUndefined', column: 19, line: 1 }],
output: 'expect(undefined).toBeUndefined();',
},
{
code: 'expect(undefined).toEqual(undefined);',
errors: [{ messageId: 'useToBeUndefined', column: 19, line: 1 }],
output: 'expect(undefined).toBeUndefined();',
},
{
code: 'expect("a string").not.toBe(undefined);',
errors: [{ messageId: 'useToBeUndefined', column: 24, line: 1 }],
output: 'expect("a string").not.toBeUndefined();',
},
{
code: 'expect("a string").not.toEqual(undefined);',
errors: [{ messageId: 'useToBeUndefined', column: 24, line: 1 }],
output: 'expect("a string").not.toBeUndefined();',
},
],
});