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

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

tests/my-game/example/ability.ts

@@ -0,0 +1,73 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Ability {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+__init(i:number, bb:flatbuffers.ByteBuffer):Ability {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+id():number {
+  return this.bb!.readUint32(this.bb_pos);
+}
+
+mutate_id(value:number):boolean {
+  this.bb!.writeUint32(this.bb_pos + 0, value);
+  return true;
+}
+
+distance():number {
+  return this.bb!.readUint32(this.bb_pos + 4);
+}
+
+mutate_distance(value:number):boolean {
+  this.bb!.writeUint32(this.bb_pos + 4, value);
+  return true;
+}
+
+static sizeOf():number {
+  return 8;
+}
+
+static createAbility(builder:flatbuffers.Builder, id: number, distance: number):flatbuffers.Offset {
+  builder.prep(4, 8);
+  builder.writeInt32(distance);
+  builder.writeInt32(id);
+  return builder.offset();
+}
+
+
+unpack(): AbilityT {
+  return new AbilityT(
+    this.id(),
+    this.distance()
+  );
+}
+
+
+unpackTo(_o: AbilityT): void {
+  _o.id = this.id();
+  _o.distance = this.distance();
+}
+}
+
+export class AbilityT {
+constructor(
+  public id: number = 0,
+  public distance: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Ability.createAbility(builder,
+    this.id,
+    this.distance
+  );
+}
+}