import { describe, expect, it } from 'vitest';
import { sprintf } from '../sprintf';
import type { TransformedText } from '../types';

describe( 'i18n', () => {
	describe( 'sprintf', () => {
		it( 'replaces placeholders', () => {
			const result = sprintf( 'bonjour %s', 'Riad' );

			expect( result ).toBe( 'bonjour Riad' );
		} );

		it( 'replaces named placeholders', () => {
			const result = sprintf( 'bonjour %(name)s', { name: 'Riad' } );

			expect( result ).toBe( 'bonjour Riad' );
		} );

		it( 'preserves format string literal in return type', () => {
			const result = sprintf( '<Name>%s</Name>', 'Riad' );

			// Type-level test: sprintf return type should be TransformedText
			// preserving the format string literal.
			const _check: TransformedText< '<Name>%s</Name>' > = result;
			void _check;

			// At runtime it's still a regular string.
			expect( typeof result ).toBe( 'string' );
			expect( result ).toBe( '<Name>Riad</Name>' );
		} );
	} );
} );