file_loader/wrapped_load.rb

tests/_examples/file_loader/wrapped_load.rb in the metorex repository.

# `load(path, true)` runs a file inside a module of its own, and
# `load(path, SomeModule)` inside the module it is handed. Either way the
# program keeps what it had: the constants and the methods belong to the
# wrapping module, and the file runs against an object of its own that says
# it is main.

here = File.expand_path("wrapped_load_target.rb", __dir__)

$wrapped_notes = []
load(here, true)
p($wrapped_notes[0])
p($wrapped_notes[1].instance_of?(Module))
p($wrapped_notes[2])
p(Object.const_defined?(:WRAPPED_CONSTANT))

$wrapped_notes = []
holder = Module.new
load(here, holder)
p($wrapped_notes[1] == holder)
p(holder.const_defined?(:WRAPPED_CONSTANT))
p(holder.private_instance_methods.include?(:wrapped_top_method))

reader = Object.new
reader.extend(holder)
p(reader.send(:wrapped_top_method))

Output:

String
true
"main"
false
true
true
true
:wrapped_top_method