assertEquals( 0, t.keyCount() );
t.set( "test", LuaString.valueOf("foo") );
assertEquals( 1, t.keyCount() );
t.set( "explode", LuaValue.NIL );
assertEquals( 1, t.keyCount() );
t.set( 42, LuaValue.NIL );
assertEquals( 1, t.keyCount() );
t.set( new_Table(), LuaValue.NIL );
assertEquals( 1, t.keyCount() );
t.set( "test", LuaValue.NIL );