require_relative '../../spec_helper'

describe "The TOPLEVEL_BINDING constant" do

it "only includes local variables defined in the main script, not in required files or eval" do

binding_toplevel_variables = ruby_exe(fixture(__FILE__, "toplevel_binding_variables.rb"))

binding_toplevel_variables.should == "[:required_after, [:main_script]]\n[:main_script]\n"

end

it "has no local variables in files required before the main script" do

required = fixture(__FILE__, 'toplevel_binding_required_before.rb')

out = ruby_exe("a=1; p TOPLEVEL_BINDING.local_variables.sort; b=2", options: "-r#{required}")

out.should == "[:required_before, []]\n[:a, :b]\n"

end

it "merges local variables of the main script with dynamically-defined Binding variables" do

required = fixture(__FILE__, 'toplevel_binding_dynamic_required.rb')

out = ruby_exe(fixture(__FILE__, 'toplevel_binding_dynamic.rb'), options: "-r#{required}")

out.should == <<EOS

[:dynamic_set_required]

[:dynamic_set_required, :main_script]

[:dynamic_set_main, :dynamic_set_required, :main_script]

EOS

end

it "gets updated variables values as they are defined and set" do

out = ruby_exe(fixture(__FILE__, "toplevel_binding_values.rb"))

out.should == "nil\nnil\n1\nnil\n3\n2\n"

end

it "is always the same object for all top levels" do

binding_toplevel_id = ruby_exe(fixture(__FILE__, "toplevel_binding_id.rb"))

binding_toplevel_id.should == "1\n"

end

end