import { assert } from 'chai';

import { Trace } from 'apg-lite';

import { parse } from '../../src/index.js';

describe('parse', function () {

context('trace', function () {

specify('should not produce trace by default', function () {

const parseResult = parse('/a/b');

assert.isUndefined(parseResult.trace);

});

specify('should produce stats when requested', function () {

const parseResult = parse('/a/b', { trace: true });

assert.instanceOf(parseResult.trace, Trace);

});

specify('should provide trace', function () {

const parseResult = parse('/a', { trace: true });

const expected =

'|-|[RNM(json-pointer)]/a\n' +

'.|-|[REP(0,inf)]/a\n' +

'..|-|[CAT]/a\n' +

'...|-|[RNM(slash)]/a\n' +

'....|-|[TLS(/)]/a\n' +

"....|M|[TLS(/)]'/'\n" +

"...|M|[RNM(slash)]'/'\n" +

'...|-|[RNM(reference-token)]a\n' +

'....|-|[REP(0,inf)]a\n' +

'....||-|[ALT]a\n' +

'....|.|-|[RNM(unescaped)]a\n' +

'....|..|-|[ALT]a\n' +

'....|...|-|[TRG(0,46)]a\n' +

'....|...|N|[TRG(0,46)]\n' +

'....|...|-|[TRG(48,125)]a\n' +

"....|...|M|[TRG(48,125)]'a'\n" +

"....|..|M|[ALT]'a'\n" +

"....|.|M|[RNM(unescaped)]'a'\n" +

"....||M|[ALT]'a'\n" +

"....|M|[REP(0,inf)]'a'\n" +

"...|M|[RNM(reference-token)]'a'\n" +

"..|M|[CAT]'/a'\n" +

".|M|[REP(0,inf)]'/a'\n" +

"|M|[RNM(json-pointer)]'/a'\n";

assert.strictEqual(parseResult.trace.displayTrace(), expected);

});

specify('should be able to create human-readable trace message', function () {

const { result, trace } = parse('1', { trace: true });

const expectations = trace.inferExpectations();

const errorMessage = `Invalid JSON Pointer: "1". Syntax error at position ${result.maxMatched}, expected ${expectations}`;

assert.isFalse(result.success);

assert.strictEqual(

errorMessage,

'Invalid JSON Pointer: "1". Syntax error at position 0, expected "/"',

);

});

});

});