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describe :argf_read, shared: true do
before :each do
@file1_name = fixture __FILE__, "file1.txt"
@stdin_name = fixture __FILE__, "stdin.txt"
@file1 = File.read @file1_name
@stdin = File.read @stdin_name
end
it "treats second nil argument as no output buffer" do
argf [@file1_name] do
@argf.send(@method, @file1.size, nil).should == @file1
end
end
it "treats second argument as an output buffer" do
argf [@file1_name] do
buffer = ""
@argf.send(@method, @file1.size, buffer)
buffer.should == @file1
end
end
it "clears output buffer before appending to it" do
argf [@file1_name] do
buffer = "to be cleared"
@argf.send(@method, @file1.size, buffer)
buffer.should == @file1
end
end
it "reads a number of bytes from the first file" do
argf [@file1_name] do
@argf.send(@method, 5).should == @file1[0, 5]
end
end
it "reads from a single file consecutively" do
argf [@file1_name] do
@argf.send(@method, 1).should == @file1[0, 1]
@argf.send(@method, 2).should == @file1[1, 2]
@argf.send(@method, 3).should == @file1[3, 3]
end
end
it "reads a number of bytes from stdin" do
stdin = ruby_exe("print ARGF.#{@method}(10)", :args => "< #{@stdin_name}")
stdin.should == @stdin[0, 10]
end
platform_is_not :windows do
it "reads the contents of a special device file" do
argf ['/dev/zero'] do
@argf.send(@method, 100).should == "\000" * 100
end
end
end
end
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