tst/tagged_object.test.ts


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import { isObject, isTagged } from '../lib/index';

describe('types/tagged + types/object', () => {
    test('isObject excludes null/arrays', () => {
        expect(isObject({})).toBe(true);
        expect(isObject([])).toBe(false);
        expect(isObject(null)).toBe(false);
        expect(isObject('x')).toBe(false);
    });

    test('isTagged checks _tag field', () => {
        expect(isTagged({ _tag: 'X' }, 'X')).toBe(true);
        expect(isTagged({ _tag: 'Y' }, 'X')).toBe(false);
        expect(isTagged({}, 'X')).toBe(false);
    });
});