tp0111_ok.rb

require "typeprof"

target_code = <<~STR
result = []
a = [1,2,3].each do |x|
  result << x * 2
end
p a
p result
STR

rb_files = rb_files = [["file.rb", target_code]]
rbs_files = []

output = StringIO.new("")
options = {}
options[:show_untyped] = true
options[:show_errors] = true
options[:show_indicator] = false
options[:show_typeprof_version] = false
config = TypeProf::ConfigData.new(
  rb_files: rb_files,
  rbs_files: rbs_files,
  output: output,
  options: options,
  verbose: 0,
)
TypeProf.analyze(config)
p output = output.string
#=> "# Revealed types\n#  file.rb:5 #=> [Integer, Integer, Integer]\n#  file.rb:6 #=> Array[Integer]\n\n# Classes\n"