unqoting data

double_module_creation_helper.exs

# helper function for creating double modules
# with function `call` returning initially provided data
#
# argument exampes:
# name = SomeModuleTest.ForTestCase
# data = [%{"some" => "data"}]

def create_double_module(name, data) do
  contents = quote do
    def call(_module, _fun, _args) do
      unquote(data) # Invalid quoted expression (as thats data and not quoted code)
    end
  end
  Module.create(name, contents, Macro.Env.location(__ENV__))
end

unquote(Macro.escape(data)) works thanks to @michalmuskala