370 lines
14 KiB
JavaScript
370 lines
14 KiB
JavaScript
// Run this using JavaScriptTest.sh
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var assert = require('assert');
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var fs = require('fs');
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var flatbuffers = require('../js/flatbuffers').flatbuffers;
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var MyGame = require(process.argv[2]).MyGame;
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function main() {
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// First, let's test reading a FlatBuffer generated by C++ code:
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// This file was generated from monsterdata_test.json
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var data = new Uint8Array(fs.readFileSync('monsterdata_test.mon'));
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// Now test it:
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var bb = new flatbuffers.ByteBuffer(data);
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testBuffer(bb);
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// Second, let's create a FlatBuffer from scratch in JavaScript, and test it also.
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// We use an initial size of 1 to exercise the reallocation algorithm,
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// normally a size larger than the typical FlatBuffer you generate would be
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// better for performance.
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var fbb = new flatbuffers.Builder(1);
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createMonster(fbb);
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serializeAndTest(fbb);
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// clear the builder, repeat tests
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var clearIterations = 100;
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var startingCapacity = fbb.bb.capacity();
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for (var i = 0; i < clearIterations; i++) {
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fbb.clear();
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createMonster(fbb);
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serializeAndTest(fbb);
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}
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// the capacity of our buffer shouldn't increase with the same size payload
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assert.strictEqual(fbb.bb.capacity(), startingCapacity);
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test64bit();
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testUnicode();
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fuzzTest1();
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console.log('FlatBuffers test: completed successfully');
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}
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function createMonster(fbb) {
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// We set up the same values as monsterdata.json:
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var str = fbb.createString('MyMonster');
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var inv = MyGame.Example.Monster.createInventoryVector(fbb, [0, 1, 2, 3, 4]);
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var fred = fbb.createString('Fred');
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addName(fbb, fred);
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var mon2 = MyGame.Example.Monster.endMonster(fbb);
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MyGame.Example.Monster.startTest4Vector(fbb, 2);
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MyGame.Example.Test.createTest(fbb, 10, 20);
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MyGame.Example.Test.createTest(fbb, 30, 40);
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var test4 = fbb.endVector();
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var testArrayOfString = MyGame.Example.Monster.createTestarrayofstringVector(fbb, [
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fbb.createString('test1'),
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fbb.createString('test2')
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]);
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addPos(fbb, MyGame.Example.Vec3.createVec3(fbb, 1, 2, 3, 3, MyGame.Example.Color.Green, 5, 6));
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MyGame.Example.Monster.addHp(fbb, 80);
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MyGame.Example.Monster.addName(fbb, str);
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MyGame.Example.Monster.addInventory(fbb, inv);
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MyGame.Example.Monster.addTestType(fbb, MyGame.Example.Any.Monster);
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MyGame.Example.Monster.addTest(fbb, mon2);
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MyGame.Example.Monster.addTest4(fbb, test4);
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MyGame.Example.Monster.addTestarrayofstring(fbb, testArrayOfString);
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MyGame.Example.Monster.addTestbool(fbb, true);
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var mon = MyGame.Example.Monster.endMonster(fbb);
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MyGame.Example.Monster.finishMonsterBuffer(fbb, mon);
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}
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function serializeAndTest(fbb) {
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// Write the result to a file for debugging purposes:
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// Note that the binaries are not necessarily identical, since the JSON
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// parser may serialize in a slightly different order than the above
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// JavaScript code. They are functionally equivalent though.
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fs.writeFileSync('monsterdata_javascript_wire.mon', new Buffer(fbb.asUint8Array()));
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// Tests mutation first. This will verify that we did not trample any other
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// part of the byte buffer.
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testMutation(fbb.dataBuffer());
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testBuffer(fbb.dataBuffer());
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}
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function testMutation(bb) {
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var monster = MyGame.Example.Monster.getRootAsMonster(bb);
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monster.mutate_hp(120);
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assert.strictEqual(monster.hp(), 120);
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monster.mutate_hp(80);
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assert.strictEqual(monster.hp(), 80);
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var manaRes = monster.mutate_mana(10);
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assert.strictEqual(manaRes, false); // Field was NOT present, because default value.
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// TODO: There is not the availability to mutate structs or vectors.
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}
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function testBuffer(bb) {
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assert.ok(MyGame.Example.Monster.bufferHasIdentifier(bb));
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var monster = MyGame.Example.Monster.getRootAsMonster(bb);
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assert.strictEqual(monster.hp(), 80);
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assert.strictEqual(monster.mana(), 150); // default
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assert.strictEqual(monster.name(), 'MyMonster');
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var pos = monster.pos();
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assert.strictEqual(pos.x(), 1);
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assert.strictEqual(pos.y(), 2);
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assert.strictEqual(pos.z(), 3);
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assert.strictEqual(pos.test1(), 3);
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assert.strictEqual(pos.test2(), MyGame.Example.Color.Green);
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var t = pos.test3();
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assert.strictEqual(t.a(), 5);
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assert.strictEqual(t.b(), 6);
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assert.strictEqual(monster.testType(), MyGame.Example.Any.Monster);
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var monster2 = new MyGame.Example.Monster();
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assert.strictEqual(monster.test(monster2) != null, true);
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assert.strictEqual(monster2.name(), 'Fred');
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assert.strictEqual(monster.inventoryLength(), 5);
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var invsum = 0;
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for (var i = 0; i < monster.inventoryLength(); i++) {
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invsum += monster.inventory(i);
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}
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assert.strictEqual(invsum, 10);
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var invsum2 = 0;
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var invArr = monster.inventoryArray();
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for (var i = 0; i < invArr.length; i++) {
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invsum2 += invArr[i];
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}
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assert.strictEqual(invsum2, 10);
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var test_0 = monster.test4(0);
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var test_1 = monster.test4(1);
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assert.strictEqual(monster.test4Length(), 2);
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assert.strictEqual(test_0.a() + test_0.b() + test_1.a() + test_1.b(), 100);
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assert.strictEqual(monster.testarrayofstringLength(), 2);
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assert.strictEqual(monster.testarrayofstring(0), 'test1');
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assert.strictEqual(monster.testarrayofstring(1), 'test2');
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assert.strictEqual(monster.testbool(), true);
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}
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function test64bit() {
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var fbb = new flatbuffers.Builder();
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var required = fbb.createString('required');
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MyGame.Example.Stat.startStat(fbb);
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var stat2 = MyGame.Example.Stat.endStat(fbb);
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addName(fbb, required);
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MyGame.Example.Monster.addTestempty(fbb, stat2);
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var mon2 = MyGame.Example.Monster.endMonster(fbb);
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MyGame.Example.Stat.startStat(fbb);
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// 2541551405100253985 = 0x87654321(low part) + 0x23456789 * 0x100000000(high part);
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MyGame.Example.Stat.addVal(fbb, new flatbuffers.Long(0x87654321, 0x23456789)); // the low part is Uint32
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var stat = MyGame.Example.Stat.endStat(fbb);
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addName(fbb, required);
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MyGame.Example.Monster.addEnemy(fbb, mon2);
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MyGame.Example.Monster.addTestempty(fbb, stat);
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var mon = MyGame.Example.Monster.endMonster(fbb);
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MyGame.Example.Monster.finishMonsterBuffer(fbb, mon);
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var bytes = fbb.asUint8Array();
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////////////////////////////////////////////////////////////////
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var bb = new flatbuffers.ByteBuffer(bytes);
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assert.ok(MyGame.Example.Monster.bufferHasIdentifier(bb));
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var mon = MyGame.Example.Monster.getRootAsMonster(bb);
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var stat = mon.testempty();
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assert.strictEqual(stat != null, true);
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assert.strictEqual(stat.val() != null, true);
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assert.strictEqual(stat.val().toFloat64(), 2541551405100253985);
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var mon2 = mon.enemy();
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assert.strictEqual(mon2 != null, true);
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stat = mon2.testempty();
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assert.strictEqual(stat != null, true);
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assert.strictEqual(stat.val() != null, true);
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assert.strictEqual(stat.val().low, 0); // default value
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assert.strictEqual(stat.val().high, 0);
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}
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function testUnicode() {
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var correct = fs.readFileSync('unicode_test.mon');
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var json = JSON.parse(fs.readFileSync('unicode_test.json', 'utf8'));
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// Test reading
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function testReadingUnicode(bb) {
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var monster = MyGame.Example.Monster.getRootAsMonster(bb);
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assert.strictEqual(monster.name(), json.name);
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assert.deepEqual(new Buffer(monster.name(flatbuffers.Encoding.UTF8_BYTES)), new Buffer(json.name));
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assert.strictEqual(monster.testarrayoftablesLength(), json.testarrayoftables.length);
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json.testarrayoftables.forEach(function(table, i) {
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var value = monster.testarrayoftables(i);
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assert.strictEqual(value.name(), table.name);
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assert.deepEqual(new Buffer(value.name(flatbuffers.Encoding.UTF8_BYTES)), new Buffer(table.name));
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});
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assert.strictEqual(monster.testarrayofstringLength(), json.testarrayofstring.length);
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json.testarrayofstring.forEach(function(string, i) {
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assert.strictEqual(monster.testarrayofstring(i), string);
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assert.deepEqual(new Buffer(monster.testarrayofstring(i, flatbuffers.Encoding.UTF8_BYTES)), new Buffer(string));
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});
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}
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testReadingUnicode(new flatbuffers.ByteBuffer(new Uint8Array(correct)));
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// Test writing
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var fbb = new flatbuffers.Builder();
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var name = fbb.createString(json.name);
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var testarrayoftablesOffsets = json.testarrayoftables.map(function(table) {
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var name = fbb.createString(new Uint8Array(new Buffer(table.name)));
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addName(fbb, name);
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return MyGame.Example.Monster.endMonster(fbb);
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});
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var testarrayoftablesOffset = MyGame.Example.Monster.createTestarrayoftablesVector(fbb,
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testarrayoftablesOffsets);
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var testarrayofstringOffset = MyGame.Example.Monster.createTestarrayofstringVector(fbb,
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json.testarrayofstring.map(function(string) { return fbb.createString(string); }));
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MyGame.Example.Monster.startMonster(fbb);
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MyGame.Example.Monster.addTestarrayofstring(fbb, testarrayofstringOffset);
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MyGame.Example.Monster.addTestarrayoftables(fbb, testarrayoftablesOffset);
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MyGame.Example.Monster.addName(fbb, name);
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MyGame.Example.Monster.finishSizePrefixedMonsterBuffer(fbb, MyGame.Example.Monster.endMonster(fbb));
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var bb = new flatbuffers.ByteBuffer(fbb.asUint8Array())
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bb.setPosition(4);
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testReadingUnicode(bb);
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}
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var __imul = Math.imul ? Math.imul : function(a, b) {
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var ah = a >> 16 & 65535;
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var bh = b >> 16 & 65535;
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var al = a & 65535;
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var bl = b & 65535;
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return al * bl + (ah * bl + al * bh << 16) | 0;
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};
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// Include simple random number generator to ensure results will be the
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// same cross platform.
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// http://en.wikipedia.org/wiki/Park%E2%80%93Miller_random_number_generator
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var lcg_seed = 48271;
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function lcg_rand() {
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return lcg_seed = (__imul(lcg_seed, 279470273) >>> 0) % 4294967291;
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}
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function lcg_reset() {
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lcg_seed = 48271;
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}
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// Converts a Field ID to a virtual table offset.
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function fieldIndexToOffset(field_id) {
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// Should correspond to what EndTable() below builds up.
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var fixed_fields = 2; // Vtable size and Object Size.
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return (field_id + fixed_fields) * 2;
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}
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// Low level stress/fuzz test: serialize/deserialize a variety of
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// different kinds of data in different combinations
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function fuzzTest1() {
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// Values we're testing against: chosen to ensure no bits get chopped
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// off anywhere, and also be different from eachother.
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var bool_val = true;
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var char_val = -127; // 0x81
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var uchar_val = 0xFF;
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var short_val = -32222; // 0x8222;
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var ushort_val = 0xFEEE;
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var int_val = 0x83333333 | 0;
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var uint_val = 0xFDDDDDDD;
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var long_val = new flatbuffers.Long(0x44444444, 0x84444444);
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var ulong_val = new flatbuffers.Long(0xCCCCCCCC, 0xFCCCCCCC);
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var float_val = new Float32Array([3.14159])[0];
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var double_val = 3.14159265359;
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var test_values_max = 11;
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var fields_per_object = 4;
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var num_fuzz_objects = 10000; // The higher, the more thorough :)
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var builder = new flatbuffers.Builder();
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lcg_reset(); // Keep it deterministic.
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var objects = [];
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// Generate num_fuzz_objects random objects each consisting of
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// fields_per_object fields, each of a random type.
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for (var i = 0; i < num_fuzz_objects; i++) {
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builder.startObject(fields_per_object);
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for (var f = 0; f < fields_per_object; f++) {
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var choice = lcg_rand() % test_values_max;
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switch (choice) {
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case 0: builder.addFieldInt8(f, bool_val, 0); break;
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case 1: builder.addFieldInt8(f, char_val, 0); break;
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case 2: builder.addFieldInt8(f, uchar_val, 0); break;
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case 3: builder.addFieldInt16(f, short_val, 0); break;
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case 4: builder.addFieldInt16(f, ushort_val, 0); break;
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case 5: builder.addFieldInt32(f, int_val, 0); break;
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case 6: builder.addFieldInt32(f, uint_val, 0); break;
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case 7: builder.addFieldInt64(f, long_val, flatbuffers.Long.ZERO); break;
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case 8: builder.addFieldInt64(f, ulong_val, flatbuffers.Long.ZERO); break;
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case 9: builder.addFieldFloat32(f, float_val, 0); break;
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case 10: builder.addFieldFloat64(f, double_val, 0); break;
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}
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}
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objects.push(builder.endObject());
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}
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builder.prep(8, 0); // Align whole buffer.
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lcg_reset(); // Reset.
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builder.finish(objects[objects.length - 1]);
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var bytes = new Uint8Array(builder.asUint8Array());
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var view = new DataView(bytes.buffer);
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// Test that all objects we generated are readable and return the
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// expected values. We generate random objects in the same order
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// so this is deterministic.
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for (var i = 0; i < num_fuzz_objects; i++) {
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var offset = bytes.length - objects[i];
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for (var f = 0; f < fields_per_object; f++) {
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var choice = lcg_rand() % test_values_max;
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var vtable_offset = fieldIndexToOffset(f);
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var vtable = offset - view.getInt32(offset, true);
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assert.ok(vtable_offset < view.getInt16(vtable, true));
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var field_offset = offset + view.getInt16(vtable + vtable_offset, true);
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switch (choice) {
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case 0: assert.strictEqual(!!view.getInt8(field_offset), bool_val); break;
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case 1: assert.strictEqual(view.getInt8(field_offset), char_val); break;
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case 2: assert.strictEqual(view.getUint8(field_offset), uchar_val); break;
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case 3: assert.strictEqual(view.getInt16(field_offset, true), short_val); break;
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case 4: assert.strictEqual(view.getUint16(field_offset, true), ushort_val); break;
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case 5: assert.strictEqual(view.getInt32(field_offset, true), int_val); break;
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case 6: assert.strictEqual(view.getUint32(field_offset, true), uint_val); break;
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case 7: assert.strictEqual(view.getInt32(field_offset, true), long_val.low); assert.strictEqual(view.getInt32(field_offset + 4, true), long_val.high); break;
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case 8: assert.strictEqual(view.getInt32(field_offset, true), ulong_val.low); assert.strictEqual(view.getInt32(field_offset + 4, true), ulong_val.high); break;
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case 9: assert.strictEqual(view.getFloat32(field_offset, true), float_val); break;
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case 10: assert.strictEqual(view.getFloat64(field_offset, true), double_val); break;
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}
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}
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}
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}
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main();
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