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# Convenience helper for altering ARGV. Saves the
# value of ARGV and sets it to +args+. If a block
# is given, yields to the block and then restores
# the value of ARGV. The previously saved value of
# ARGV can be restored by passing +:restore+. The
# former is useful in a single spec. The latter is
# useful in before/after actions. For example:
#
# describe "This" do
# before do
# argv ['a', 'b']
# end
#
# after do
# argv :restore
# end
#
# it "does something" do
# # do something
# end
# end
#
# describe "That" do
# it "does something" do
# argv ['a', 'b'] do
# # do something
# end
# end
# end
def argv(args)
if args == :restore
ARGV.replace(@__mspec_saved_argv__ || [])
else
@__mspec_saved_argv__ = ARGV.dup
ARGV.replace args
if block_given?
begin
yield
ensure
argv :restore
end
end
end
end
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