TypeScript/scripts/eslint/tests/no-type-assertion-whitespace.test.ts

import { RuleTester } from "./support/RuleTester";
import rule = require("../rules/no-type-assertion-whitespace");

const ruleTester = new RuleTester({
    parserOptions: {
        warnOnUnsupportedTypeScriptVersion: false,
    },
    parser: require.resolve("@typescript-eslint/parser"),
});

ruleTester.run("no-type-assertion-whitespace", rule, {
    valid: [
        {
            code: `const a = <number>1`,
        },
        {
            code: `const s = <Type>(new Symbol(1, 'name'));`,
        },
    ],

    invalid: [
        {
            code: `const a = <number> 1`,
            errors: [{ messageId: "noTypeAssertionWhitespace", column: 19, line: 1 }],
        },
        {
            code: `const a = <number>  1`,
            errors: [{ messageId: "noTypeAssertionWhitespace", column: 19, line: 1 }],
        },
        {
            code: `const a = <number>                1`,
            errors: [{ messageId: "noTypeAssertionWhitespace", column: 19, line: 1 }],
        },
        {
            code: `const s = <Type>  (new Symbol(1, 'name'));`,
            errors: [{ messageId: "noTypeAssertionWhitespace", column: 17, line: 1 }],
        },
    ],
});