tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersUnionTests.swift

import XCTest
@testable import FlatBuffers

final class FlatBuffersUnionTests: XCTestCase {
    
    func testCreateMonstor() {
        
        var b = FlatBufferBuilder(initialSize: 20)
        let dmg: Int16 = 5
        let str = "Axe"
        let axe = b.create(string: str)
        let weapon = Weapon.createWeapon(builder: &b, offset: axe, dmg: dmg)
        let weapons = b.createVector(ofOffsets: [weapon])
        let root = LocalMonster.createMonster(builder: &b,
                                         offset: weapons,
                                         equipment: .Weapon,
                                         equippedOffset: weapon.o)
        b.finish(offset: root)
        let buffer = b.sizedByteArray
        XCTAssertEqual(buffer, [16, 0, 0, 0, 0, 0, 10, 0, 16, 0, 8, 0, 7, 0, 12, 0, 10, 0, 0, 0, 0, 0, 0, 1, 8, 0, 0, 0, 20, 0, 0, 0, 1, 0, 0, 0, 12, 0, 0, 0, 8, 0, 12, 0, 8, 0, 6, 0, 8, 0, 0, 0, 0, 0, 5, 0, 4, 0, 0, 0, 3, 0, 0, 0, 65, 120, 101, 0])
        let monster = LocalMonster.getRootAsMonster(bb: ByteBuffer(bytes: buffer))
        XCTAssertEqual(monster.weapon(at: 0)?.dmg, dmg)
        XCTAssertEqual(monster.weapon(at: 0)?.name, str)
        XCTAssertEqual(monster.weapon(at: 0)?.nameVector, [65, 120, 101])
        let p: Weapon? = monster.equiped()
        XCTAssertEqual(p?.dmg, dmg)
        XCTAssertEqual(p?.name, str)
        XCTAssertEqual(p?.nameVector, [65, 120, 101])
    }
    
    func testEndTableFinish() {
        var builder = FlatBufferBuilder(initialSize: 20)
        let sword = builder.create(string: "Sword")
        let axe = builder.create(string: "Axe")
        let weaponOne = Weapon.createWeapon(builder: &builder, offset: sword, dmg: 3)
        let weaponTwo = Weapon.createWeapon(builder: &builder, offset: axe, dmg: 5)
        let name = builder.create(string: "Orc")
        let inventory: [UInt8] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
        let inv = builder.createVector(inventory, size: 10)
        let weapons = builder.createVector(ofOffsets: [weaponOne, weaponTwo])
        builder.startVectorOfStructs(count: 2, size: Vec.size, alignment: Vec.alignment)
        createVecWrite(builder: &builder, x: 1.0, y: 2.0, z: 3.0)
        createVecWrite(builder: &builder, x: 4.0, y: 5.0, z: 6.0)
        let path = builder.endVectorOfStructs(count: 2)
        let orc = FinalMonster.createMonster(builder: &builder,
                                             position: createVecWrite(builder: &builder, x: 1.0, y: 2.0, z: 3.0),
                                             hp: 300,
                                             name: name,
                                             inventory: inv,
                                             color: .red,
                                             weapons: weapons,
                                             equipment: .Weapon,
                                             equippedOffset: weaponTwo,
                                             path: path)
        builder.finish(offset: orc)
        XCTAssertEqual(builder.sizedByteArray, [32, 0, 0, 0, 0, 0, 26, 0, 36, 0, 36, 0, 0, 0, 34, 0, 28, 0, 0, 0, 24, 0, 23, 0, 16, 0, 15, 0, 8, 0, 4, 0, 26, 0, 0, 0, 44, 0, 0, 0, 104, 0, 0, 0, 0, 0, 0, 1, 60, 0, 0, 0, 0, 0, 0, 0, 64, 0, 0, 0, 76, 0, 0, 0, 0, 0, 44, 1, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 0, 0, 0, 0, 128, 64, 0, 0, 160, 64, 0, 0, 192, 64, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 0, 0, 52, 0, 0, 0, 28, 0, 0, 0, 10, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 3, 0, 0, 0, 79, 114, 99, 0, 244, 255, 255, 255, 0, 0, 5, 0, 24, 0, 0, 0, 8, 0, 12, 0, 8, 0, 6, 0, 8, 0, 0, 0, 0, 0, 3, 0, 12, 0, 0, 0, 3, 0, 0, 0, 65, 120, 101, 0, 5, 0, 0, 0, 83, 119, 111, 114, 100, 0, 0, 0])
    }
    
    func testEnumVector() {
        let vectorOfEnums: [ColorsNameSpace.RGB] = [.blue, .green]
        
        var builder = FlatBufferBuilder(initialSize: 1)
        let off = builder.createVector(vectorOfEnums)
        let start = ColorsNameSpace.Monster.startMonster(&builder)
        ColorsNameSpace.Monster.add(colors: off, &builder)
        let end = ColorsNameSpace.Monster.endMonster(&builder, start: start)
        builder.finish(offset: end)
        XCTAssertEqual(builder.sizedByteArray, [12, 0, 0, 0, 0, 0, 6, 0, 8, 0, 4, 0, 6, 0, 0, 0, 4, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0])
        let monster = ColorsNameSpace.Monster.getRootAsMonster(bb: builder.buffer)
        XCTAssertEqual(monster.colorsCount, 2)
        XCTAssertEqual(monster.colors(at: 0), .blue)
        XCTAssertEqual(monster.colors(at: 1), .green)
    }
    
    func testUnionVector() {
        var fb = FlatBufferBuilder()
        
        let swordDmg: Int32 = 8
        let attackStart = Attacker.startAttacker(&fb)
        Attacker.add(swordAttackDamage: swordDmg, &fb)
        let attack = Attacker.endAttacker(&fb, start: attackStart)
        
        let characterType: [Character] = [.belle, .mulan, .bookfan]
        
        let characters = [
            BookReader.createBookReader(builder: &fb, booksRead: 7),
            attack,
            BookReader.createBookReader(builder: &fb, booksRead: 2)
        ]
        let types = fb.createVector(characterType)
        let characterVector = fb.createVector(ofOffsets: characters)
        let end = Movie.createMovie(&fb, vectorOfCharactersType: types, vectorOfCharacters: characterVector)
        Movie.finish(&fb, end: end)
        
        var movie = Movie.getRootAsMovie(bb: fb.buffer)
        XCTAssertEqual(movie.charactersTypeCount, Int32(characterType.count))
        XCTAssertEqual(movie.charactersCount, Int32(characters.count))
        
        for i in 0..<movie.charactersTypeCount {
            XCTAssertEqual(movie.charactersType(at: i), characterType[Int(i)])
        }
        
        XCTAssertEqual(movie.characters(at: 0, type: BookReader.self)?.booksRead, 7)
        XCTAssertEqual(movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage, swordDmg)
        XCTAssertEqual(movie.characters(at: 2, type: BookReader.self)?.booksRead, 2)
        
        var objc: MovieT? = movie.unpack()
        XCTAssertEqual(movie.charactersTypeCount, Int32(objc?.characters.count ?? 0))
        XCTAssertEqual(movie.characters(at: 0, type: BookReader.self)?.booksRead, (objc?.characters[0]?.value as? BookReaderT)?.booksRead)
        fb.clear()
        let newMovie = Movie.pack(&fb, obj: &objc)
        fb.finish(offset: newMovie)
        
        let packedMovie = Movie.getRootAsMovie(bb: fb.buffer)
        
        XCTAssertEqual(packedMovie.characters(at: 0, type: BookReader.self)?.booksRead, movie.characters(at: 0, type: BookReader.self)?.booksRead)
        XCTAssertEqual(packedMovie.characters(at: 1, type: Attacker.self)?.swordAttackDamage, movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage)
        XCTAssertEqual(packedMovie.characters(at: 2, type: BookReader.self)?.booksRead, movie.characters(at: 2, type: BookReader.self)?.booksRead)
    }
}

public enum ColorsNameSpace {
    
    enum RGB: Int32, Enum {
        typealias T = Int32
        static var byteSize: Int { return MemoryLayout<Int32>.size }
        var value: Int32 { return self.rawValue }
        case red = 0, green = 1, blue = 2
    }
    
    struct Monster: FlatBufferObject {
        var __buffer: ByteBuffer! { _accessor.bb }
        
        private var _accessor: Table
        static func getRootAsMonster(bb: ByteBuffer) -> Monster { return Monster(Table(bb: bb, position: Int32(bb.read(def: UOffset.self, position: bb.reader)) + Int32(bb.reader))) }
        
        init(_ t: Table) { _accessor = t }
        init(_ bb: ByteBuffer, o: Int32) { _accessor = Table(bb: bb, position: o) }
        
        public var colorsCount: Int32 { let o = _accessor.offset(4); return o == 0 ? 0 : _accessor.vector(count: o) }
        public func colors(at index: Int32) -> ColorsNameSpace.RGB? { let o = _accessor.offset(4); return o == 0 ? ColorsNameSpace.RGB(rawValue: 0)! : ColorsNameSpace.RGB(rawValue: _accessor.directRead(of: Int32.self, offset: _accessor.vector(at: o) + index * 4)) }
        static func startMonster(_ fbb: inout FlatBufferBuilder) -> UOffset { fbb.startTable(with: 1) }
        static func add(colors: Offset<UOffset>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: colors, at: 4)  }
        static func endMonster(_ fbb: inout FlatBufferBuilder, start: UOffset) -> Offset<UOffset> { let end = Offset<UOffset>(offset: fbb.endTable(at: start)); return end }
    }
}


enum Equipment: Byte { case none, Weapon }

enum Color3: Int8 { case red = 0, green, blue }

struct FinalMonster {
    
    @inlinable static func createMonster(builder: inout FlatBufferBuilder,
                                         position: Offset<UOffset>,
                                         hp: Int16,
                                         name: Offset<String>,
                                         inventory: Offset<UOffset>,
                                         color: Color3,
                                         weapons: Offset<UOffset>,
                                         equipment: Equipment = .none,
                                         equippedOffset: Offset<Weapon>,
                                         path: Offset<UOffset>) -> Offset<LocalMonster> {
        let start = builder.startTable(with: 11)
        builder.add(structOffset: 4)
        builder.add(element: hp, def: 100, at: 8)
        builder.add(offset: name, at: 10)
        builder.add(offset: inventory, at: 14)
        builder.add(element: color.rawValue, def: Color3.green.rawValue, at: 16)
        builder.add(offset: weapons, at: 18)
        builder.add(element: equipment.rawValue, def: Equipment.none.rawValue, at: 20)
        builder.add(offset: equippedOffset, at: 22)
        builder.add(offset: path, at: 24)
        return Offset(offset: builder.endTable(at: start))
    }
}

struct LocalMonster {
    
    private var __t: Table
    
    init(_ fb: ByteBuffer, o: Int32) { __t = Table(bb: fb, position: o) }
    init(_ t: Table) { __t = t }
    
    func weapon(at index: Int32) -> Weapon? { let o = __t.offset(4); return o == 0 ? nil : Weapon.assign(__t.indirect(__t.vector(at: o) + (index * 4)), __t.bb) }
    
    func equiped<T: FlatBufferObject>() -> T? {
        let o = __t.offset(8); return o == 0 ? nil : __t.union(o)
    }
    
    static func getRootAsMonster(bb: ByteBuffer) -> LocalMonster {
        return LocalMonster(Table(bb: bb, position: Int32(bb.read(def: UOffset.self, position: 0))))
    }
    
    @inlinable static func createMonster(builder: inout FlatBufferBuilder,
                                         offset: Offset<UOffset>,
                                         equipment: Equipment = .none,
                                         equippedOffset: UOffset) -> Offset<LocalMonster> {
        let start = builder.startTable(with: 3)
        builder.add(element: equippedOffset, def: 0, at: 8)
        builder.add(offset: offset, at: 4)
        builder.add(element: equipment.rawValue, def: Equipment.none.rawValue, at: 6)
        return Offset(offset: builder.endTable(at: start))
    }
}

struct Weapon: FlatBufferObject {
    
    var __buffer: ByteBuffer! { __t.bb }
    
    static let offsets: (name: VOffset, dmg: VOffset) = (4, 6)
    private var __t: Table
    
    init(_ t: Table) { __t = t }
    init(_ fb: ByteBuffer, o: Int32) { __t = Table(bb: fb, position: o)}
    
    var dmg: Int16 { let o = __t.offset(6); return o == 0 ? 0 : __t.readBuffer(of: Int16.self, at: o) }
    var nameVector: [UInt8]? { return __t.getVector(at: 4) }
    var name: String? { let o = __t.offset(4); return o == 0 ? nil : __t.string(at: o) }
    
    static func assign(_ i: Int32, _ bb: ByteBuffer) -> Weapon { return Weapon(Table(bb: bb, position: i)) }
    
    @inlinable static func createWeapon(builder: inout FlatBufferBuilder, offset: Offset<String>, dmg: Int16) -> Offset<Weapon> {
        let _start = builder.startTable(with: 2)
        Weapon.add(builder: &builder, name: offset)
        Weapon.add(builder: &builder, dmg: dmg)
        return Weapon.end(builder: &builder, startOffset: _start)
    }
    
    @inlinable static func end(builder: inout FlatBufferBuilder, startOffset: UOffset) -> Offset<Weapon> {
        return Offset(offset: builder.endTable(at: startOffset))
    }
    
    @inlinable static func add(builder: inout FlatBufferBuilder, name: Offset<String>) {
        builder.add(offset: name, at: Weapon.offsets.name)
    }
    
    @inlinable static func add(builder: inout FlatBufferBuilder, dmg: Int16) {
        builder.add(element: dmg, def: 0, at: Weapon.offsets.dmg)
    }
}