ruby - Uninitialized constant (Name Error) creating object -

i trying instantiate new object calling class keep getting error , don't know why. still new ruby might missing here. getting error:

testa.rb:3 in `initialize': uninitialized constant testa::testb (nameerror)     testa.rb:7:in `new'     testa.rb:7:in `<main>' 

here code: ** these 2 classes in separate files **

class testa     def initialize         @test = testb.new     end end  test = testa.new  class testb     def test_method         print "hello"     end end 

you have require file test_b class definition. if name test_b.rb looks like:

require_relative "test_b"  class testa     def initialize         @test = testb.new     end end  test = testa.new