// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library json_unicode_tests;
import 'unicode_tests.dart';

const _QUOTE = 0x22;  // "
const _COLON = 0x3a;  // :
const _COMMA = 0x2c;  // ,
const _BRACE_OPEN = 0x7b;  // {
const _BRACE_CLOSE = 0x7d;  // }
const _BRACKET_OPEN = 0x5b;  // [
const _BRACKET_CLOSE = 0x5d;  // ]

_expandUnicodeTests() {
  return UNICODE_TESTS.expand((test) {
    // The unicode test will be a string (possibly) containing unicode
    // characters. It also contains the empty string.
    // It must not contain a double-quote '"'.
    assert(!test.contains('"'));

    var bytes = test[0];
    var string = test[1];

    // expanded will hold all tests that are generated from the unicode test.
    var expanded = [];

    // Put the string into quotes.
    // For example: 'abcd' -> '"abcd"'.
    var inQuotesBytes = [];
    inQuotesBytes.add(_QUOTE);
    inQuotesBytes.addAll(bytes);
    inQuotesBytes.add(_QUOTE);
    expanded.add([inQuotesBytes, string]);

    // Put the quoted string into a triple nested list.
    // For example: 'abcd' -> '[[["abcd"]]]'.
    var listExpected = [[[string]]];
    var inListBytes = [];
    inListBytes.addAll([_BRACKET_OPEN, _BRACKET_OPEN, _BRACKET_OPEN]);
    inListBytes.addAll(inQuotesBytes);
    inListBytes.addAll([_BRACKET_CLOSE, _BRACKET_CLOSE, _BRACKET_CLOSE]);
    expanded.add([inListBytes, listExpected]);

    // Put the quoted string into a triple nested list and duplicate that
    // list three times.
    // For example: 'abcd' -> '[[[["abcd"]]],[[["abcd"]]],[[["abcd"]]]]'.
    var listLongerExpected = [listExpected, listExpected, listExpected];
    var listLongerBytes = [];
    listLongerBytes.add(_BRACKET_OPEN);
    listLongerBytes.addAll(inListBytes);
    listLongerBytes.add(_COMMA);
    listLongerBytes.addAll(inListBytes);
    listLongerBytes.add(_COMMA);
    listLongerBytes.addAll(inListBytes);
    listLongerBytes.add(_BRACKET_CLOSE);
    expanded.add([listLongerBytes, listLongerExpected]);

    // Put the previous strings/lists into a map.
    // For example:
    //    'abcd' -> '{"abcd":[[[["abcd"]]],[[["abcd"]]],[[["abcd"]]]]}'.
    var mapExpected = new Map();
    mapExpected[string] = listLongerExpected;
    var mapBytes = [];
    mapBytes.add(_BRACE_OPEN);
    mapBytes.addAll(inQuotesBytes);
    mapBytes.add(_COLON);
    mapBytes.addAll(listLongerBytes);
    mapBytes.add(_BRACE_CLOSE);
    expanded.add([mapBytes, mapExpected]);

    return expanded;
  }).toList();
}

final JSON_UNICODE_TESTS = _expandUnicodeTests();