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describe "The -n command line option" do
before :each do
@names = fixture __FILE__, "names.txt"
end
it "runs the code in loop conditional on Kernel.gets()" do
ruby_exe("puts $_", options: "-n", escape: true,
args: " < #{@names}").should ==
"alice\nbob\njames\n"
end
it "only evaluates BEGIN blocks once" do
ruby_exe("BEGIN { puts \"hi\" }; puts $_", options: "-n", escape: true,
args: " < #{@names}").should ==
"hi\nalice\nbob\njames\n"
end
it "only evaluates END blocks once" do
ruby_exe("puts $_; END {puts \"bye\"}", options: "-n", escape: true,
args: " < #{@names}").should ==
"alice\nbob\njames\nbye\n"
end
it "allows summing over a whole file" do
script = <<-script
BEGIN { $total = 0 }
$total += 1
END { puts $total }
script
ruby_exe(script, options: "-n", escape: true,
args: " < #{@names}").should ==
"3\n"
end
end
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