dart/test/flex_builder_test.dart

import 'dart:typed_data';

import 'package:flat_buffers/flex_buffers.dart' show Builder;
import 'package:test/test.dart';

void main() {
  test('build with single value', () {
    {
      var flx = Builder();
      flx.addNull();
      expect(flx.finish(), [0, 0, 1]);
    }
    {
      var flx = Builder();
      flx.addBool(true);
      expect(flx.finish(), [1, 104, 1]);
    }
    {
      var flx = Builder();
      flx.addBool(false);
      expect(flx.finish(), [0, 104, 1]);
    }
    {
      var flx = Builder();
      flx.addInt(1);
      expect(flx.finish(), [1, 4, 1]);
    }
    {
      var flx = Builder();
      flx.addInt(230);
      expect(flx.finish(), [230, 0, 5, 2]);
    }
    {
      var flx = Builder();
      flx.addInt(1025);
      expect(flx.finish(), [1, 4, 5, 2]);
    }
    {
      var flx = Builder();
      flx.addInt(-1025);
      expect(flx.finish(), [255, 251, 5, 2]);
    }
    {
      var flx = Builder();
      flx.addDouble(0.1);
      expect(flx.finish(), [154, 153, 153, 153, 153, 153, 185, 63, 15, 8]);
    }
    {
      var flx = Builder();
      flx.addDouble(0.5);
      expect(flx.finish(), [0, 0, 0, 63, 14, 4]);
    }
    {
      var flx = Builder();
      flx.addString('Maxim');
      expect(flx.finish(), [5, 77, 97, 120, 105, 109, 0, 6, 20, 1]);
    }
    {
      var flx = Builder();
      flx.addString('hello 😱');
      expect(flx.finish(),
          [10, 104, 101, 108, 108, 111, 32, 240, 159, 152, 177, 0, 11, 20, 1]);
    }
  });

  test('build vector', () {
    {
      var flx = Builder()
        ..startVector()
        ..addInt(1)
        ..addInt(2)
        ..end();
      expect(flx.finish(), [1, 2, 2, 64, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addInt(-1)
        ..addInt(256)
        ..end();
      expect(flx.finish(), [255, 255, 0, 1, 4, 65, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addInt(-45)
        ..addInt(256000)
        ..end();
      expect(flx.finish(), [211, 255, 255, 255, 0, 232, 3, 0, 8, 66, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addDouble(1.1)
        ..addDouble(-256)
        ..end();
      expect(flx.finish(), [
        154,
        153,
        153,
        153,
        153,
        153,
        241,
        63,
        0,
        0,
        0,
        0,
        0,
        0,
        112,
        192,
        16,
        75,
        1
      ]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addInt(1)
        ..addInt(2)
        ..addInt(4)
        ..end();
      expect(flx.finish(), [1, 2, 4, 3, 76, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addInt(-1)
        ..addInt(256)
        ..addInt(4)
        ..end();
      expect(flx.finish(), [255, 255, 0, 1, 4, 0, 6, 77, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..startVector()
        ..addInt(61)
        ..end()
        ..addInt(64)
        ..end();
      expect(flx.finish(), [1, 61, 2, 2, 64, 44, 4, 4, 40, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addString('foo')
        ..addString('bar')
        ..addString('baz')
        ..end();
      expect(flx.finish(), [
        3,
        102,
        111,
        111,
        0,
        3,
        98,
        97,
        114,
        0,
        3,
        98,
        97,
        122,
        0,
        3,
        15,
        11,
        7,
        3,
        60,
        1
      ]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addString('foo')
        ..addString('bar')
        ..addString('baz')
        ..addString('foo')
        ..addString('bar')
        ..addString('baz')
        ..end();
      expect(flx.finish(), [
        3,
        102,
        111,
        111,
        0,
        3,
        98,
        97,
        114,
        0,
        3,
        98,
        97,
        122,
        0,
        6,
        15,
        11,
        7,
        18,
        14,
        10,
        6,
        60,
        1
      ]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addBool(true)
        ..addBool(false)
        ..addBool(true)
        ..end();
      expect(flx.finish(), [3, 1, 0, 1, 3, 144, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..addString('foo')
        ..addInt(1)
        ..addInt(-5)
        ..addDouble(1.3)
        ..addBool(true)
        ..end();
      expect(flx.finish(), [
        3,
        102,
        111,
        111,
        0,
        0,
        0,
        0,
        5,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        15,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        1,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        251,
        255,
        255,
        255,
        255,
        255,
        255,
        255,
        205,
        204,
        204,
        204,
        204,
        204,
        244,
        63,
        1,
        0,
        0,
        0,
        0,
        0,
        0,
        0,
        20,
        4,
        4,
        15,
        104,
        45,
        43,
        1
      ]);
    }
  });

  test('build map', () {
    {
      var flx = Builder()
        ..startMap()
        ..addKey('a')
        ..addInt(12)
        ..end();
      expect(flx.finish(), [97, 0, 1, 3, 1, 1, 1, 12, 4, 2, 36, 1]);
    }
    {
      var flx = Builder()
        ..startMap()
        ..addKey('a')
        ..addInt(12)
        ..addKey('')
        ..addInt(45)
        ..end();
      expect(
          flx.finish(), [97, 0, 0, 2, 2, 5, 2, 1, 2, 45, 12, 4, 4, 4, 36, 1]);
    }
    {
      var flx = Builder()
        ..startVector()
        ..startMap()
        ..addKey('something')
        ..addInt(12)
        ..end()
        ..startMap()
        ..addKey('something')
        ..addInt(45)
        ..end()
        ..end();
      expect(flx.finish(), [
        115,
        111,
        109,
        101,
        116,
        104,
        105,
        110,
        103,
        0,
        1,
        11,
        1,
        1,
        1,
        12,
        4,
        6,
        1,
        1,
        45,
        4,
        2,
        8,
        4,
        36,
        36,
        4,
        40,
        1
      ]);
    }
  });

  test('build blob', () {
    {
      var flx = Builder()..addBlob(Uint8List.fromList([1, 2, 3]).buffer);
      expect(flx.finish(), [3, 1, 2, 3, 3, 100, 1]);
    }
  });

  test('build from object', () {
    expect(
        Builder.buildFromObject(Uint8List.fromList([1, 2, 3]).buffer)
            .asUint8List(),
        [3, 1, 2, 3, 3, 100, 1]);
    expect(Builder.buildFromObject(null).asUint8List(), [0, 0, 1]);
    expect(Builder.buildFromObject(true).asUint8List(), [1, 104, 1]);
    expect(Builder.buildFromObject(false).asUint8List(), [0, 104, 1]);
    expect(Builder.buildFromObject(25).asUint8List(), [25, 4, 1]);
    expect(Builder.buildFromObject(-250).asUint8List(), [6, 255, 5, 2]);
    expect(
        Builder.buildFromObject(-2.50).asUint8List(), [0, 0, 32, 192, 14, 4]);
    expect(Builder.buildFromObject('Maxim').asUint8List(),
        [5, 77, 97, 120, 105, 109, 0, 6, 20, 1]);
    expect(
        Builder.buildFromObject([1, 3.3, 'max', true, null, false])
            .asUint8List(),
        [
          3,
          109,
          97,
          120,
          0,
          0,
          0,
          0,
          6,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          1,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          102,
          102,
          102,
          102,
          102,
          102,
          10,
          64,
          31,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          1,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          4,
          15,
          20,
          104,
          0,
          104,
          54,
          43,
          1
        ]);
    expect(
        Builder.buildFromObject([
          {'something': 12},
          {'something': 45}
        ]).asUint8List(),
        [
          115,
          111,
          109,
          101,
          116,
          104,
          105,
          110,
          103,
          0,
          1,
          11,
          1,
          1,
          1,
          12,
          4,
          6,
          1,
          1,
          45,
          4,
          2,
          8,
          4,
          36,
          36,
          4,
          40,
          1
        ]);
  });

  test('add double indirectly', () {
    var flx = Builder()..addDoubleIndirectly(0.1);
    expect(flx.finish(), [154, 153, 153, 153, 153, 153, 185, 63, 8, 35, 1]);
  });

  test('add double indirectly to vector with cache', () {
    var flx = Builder()
      ..startVector()
      ..addDoubleIndirectly(0.1, cache: true)
      ..addDoubleIndirectly(0.1, cache: true)
      ..addDoubleIndirectly(0.1, cache: true)
      ..addDoubleIndirectly(0.1, cache: true)
      ..end();
    expect(flx.finish(), [
      154,
      153,
      153,
      153,
      153,
      153,
      185,
      63,
      4,
      9,
      10,
      11,
      12,
      35,
      35,
      35,
      35,
      8,
      40,
      1
    ]);
  });

  test('add int indirectly', () {
    var flx = Builder()..addIntIndirectly(2345234523452345);
    expect(flx.finish(), [185, 115, 175, 118, 250, 84, 8, 0, 8, 27, 1]);
  });

  test('add int indirectly to vector with cache', () {
    var flx = Builder()
      ..startVector()
      ..addIntIndirectly(2345234523452345, cache: true)
      ..addIntIndirectly(2345234523452345, cache: true)
      ..addIntIndirectly(2345234523452345, cache: true)
      ..addIntIndirectly(2345234523452345, cache: true)
      ..end();
    expect(flx.finish(), [
      185,
      115,
      175,
      118,
      250,
      84,
      8,
      0,
      4,
      9,
      10,
      11,
      12,
      27,
      27,
      27,
      27,
      8,
      40,
      1
    ]);
  });

  test('snapshot', () {
    var flx = Builder();
    flx.startVector();
    flx.addInt(12);
    expect(flx.snapshot().asUint8List(), [1, 12, 1, 44, 1]);
    flx.addInt(24);
    expect(flx.snapshot().asUint8List(), [12, 24, 2, 64, 1]);
    flx.addInt(45);
    expect(flx.snapshot().asUint8List(), [12, 24, 45, 3, 76, 1]);
  });
}