import { Reader } from '@preserves/core';
import { Meta, readSchema } from '../src/index';
import './test-utils';

describe('checker', () => {
    describe('simplest non-bijection tests', () => {
        it('passes simple non-bijection test', () => {
            expect(readSchema('version 1 . A = <a @x string @y symbol> .')).not.toBeNull();
        });
        it('passes non-bijection check for literal field', () => {
            expect(readSchema('version 1 . A = <a "string" @y symbol> .')).not.toBeNull();
        });
        it('detects non-bijection for string field', () => {
            expect(() => readSchema('version 1 . A = <a string @y symbol> .')).toThrow(/item 0 of fields of A/);
        });
        it('detects non-bijection for symbol field', () => {
            expect(() => readSchema('version 1 . A = <a @x string symbol> .')).toThrow(/item 1 of fields of A/);
        });
    });

    describe('extensible record', () => {
        it('is happy with extensible record', () => {
            expect(Meta.fromSchema(readSchema(
                'version 1 . ExtensibleRecord = <foo @a string @b string @extra any ...>.')))
                .is(new Reader(
                    `<schema {
                       version: 1,
                       embeddedType: #f,
                       definitions: {
                         ExtensibleRecord:
                           <rec <lit foo>
                                <tuple* [<named a <atom String>>, <named b <atom String>>]
                                        <named extra <seqof any>>>>}}>`).next());
        });
        it('non-bijection tail', () => {
            expect(() => readSchema(
                'version 1 . ExtensibleRecord = <foo @a string @b string any ...>.'))
                .toThrow(/tail of fields of ExtensibleRecord/);
        });
    });
});