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

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

tests/namespace_test/namespace-a/namespace-b/table-in-nested-n-s.ts

@@ -0,0 +1,87 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class TableInNestedNS {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+__init(i:number, bb:flatbuffers.ByteBuffer):TableInNestedNS {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsTableInNestedNS(bb:flatbuffers.ByteBuffer, obj?:TableInNestedNS):TableInNestedNS {
+  return (obj || new TableInNestedNS()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsTableInNestedNS(bb:flatbuffers.ByteBuffer, obj?:TableInNestedNS):TableInNestedNS {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new TableInNestedNS()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+foo():number {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
+mutate_foo(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 'NamespaceA.NamespaceB.TableInNestedNS';
+}
+
+static startTableInNestedNS(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addFoo(builder:flatbuffers.Builder, foo:number) {
+  builder.addFieldInt32(0, foo, 0);
+}
+
+static endTableInNestedNS(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createTableInNestedNS(builder:flatbuffers.Builder, foo:number):flatbuffers.Offset {
+  TableInNestedNS.startTableInNestedNS(builder);
+  TableInNestedNS.addFoo(builder, foo);
+  return TableInNestedNS.endTableInNestedNS(builder);
+}
+
+unpack(): TableInNestedNST {
+  return new TableInNestedNST(
+    this.foo()
+  );
+}
+
+
+unpackTo(_o: TableInNestedNST): void {
+  _o.foo = this.foo();
+}
+}
+
+export class TableInNestedNST {
+constructor(
+  public foo: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return TableInNestedNS.createTableInNestedNS(builder,
+    this.foo
+  );
+}
+}