fixed invalid TS call and added test files (#6495)

e581013e3d broke TS generation - please don't use "replace" to refactor function names :)

tests/union_vector/attacker.ts

@@ -0,0 +1,87 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Attacker {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+__init(i:number, bb:flatbuffers.ByteBuffer):Attacker {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsAttacker(bb:flatbuffers.ByteBuffer, obj?:Attacker):Attacker {
+  return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsAttacker(bb:flatbuffers.ByteBuffer, obj?:Attacker):Attacker {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+swordAttackDamage():number {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
+mutate_sword_attack_damage(value:number):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeInt32(this.bb_pos + offset, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'Attacker';
+}
+
+static startAttacker(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addSwordAttackDamage(builder:flatbuffers.Builder, swordAttackDamage:number) {
+  builder.addFieldInt32(0, swordAttackDamage, 0);
+}
+
+static endAttacker(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createAttacker(builder:flatbuffers.Builder, swordAttackDamage:number):flatbuffers.Offset {
+  Attacker.startAttacker(builder);
+  Attacker.addSwordAttackDamage(builder, swordAttackDamage);
+  return Attacker.endAttacker(builder);
+}
+
+unpack(): AttackerT {
+  return new AttackerT(
+    this.swordAttackDamage()
+  );
+}
+
+
+unpackTo(_o: AttackerT): void {
+  _o.swordAttackDamage = this.swordAttackDamage();
+}
+}
+
+export class AttackerT {
+constructor(
+  public swordAttackDamage: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Attacker.createAttacker(builder,
+    this.swordAttackDamage
+  );
+}
+}