describe :argf_fileno, shared: true do before :each do @file1 = fixture __FILE__, "file1.txt" @file2 = fixture __FILE__, "file2.txt" end # NOTE: this test assumes that fixtures files have two lines each it "returns the current file number on each file" do argf [@file1, @file2] do result = [] # returns first current file even when not yet open result << @argf.send(@method) while @argf.gets # returns last current file even when closed result.map { |d| d.class }.should == [Fixnum, Fixnum, Fixnum, Fixnum] end end it "raises an ArgumentError when called on a closed stream" do argf [@file1] do @argf.read -> { @argf.send(@method) }.should raise_error(ArgumentError) end end end