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1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
82 lines
2.3 KiB
Ruby
82 lines
2.3 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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describe "IO#sysread on a file" do
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before :each do
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@file_name = tmp("IO_sysread_file") + $$.to_s
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File.open(@file_name, "w") do |f|
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# write some stuff
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f.write("012345678901234567890123456789")
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end
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@file = File.open(@file_name, "r+")
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end
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after :each do
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@file.close
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rm_r @file_name
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end
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it "reads the specified number of bytes from the file" do
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@file.sysread(15).should == "012345678901234"
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end
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it "reads the specified number of bytes from the file to the buffer" do
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buf = "" # empty buffer
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@file.sysread(15, buf).should == buf
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buf.should == "012345678901234"
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@file.rewind
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buf = "ABCDE" # small buffer
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@file.sysread(15, buf).should == buf
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buf.should == "012345678901234"
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@file.rewind
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buf = "ABCDE" * 5 # large buffer
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@file.sysread(15, buf).should == buf
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buf.should == "012345678901234"
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end
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it "coerces the second argument to string and uses it as a buffer" do
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buf = "ABCDE"
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(obj = mock("buff")).should_receive(:to_str).any_number_of_times.and_return(buf)
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@file.sysread(15, obj).should == buf
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buf.should == "012345678901234"
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end
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it "advances the position of the file by the specified number of bytes" do
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@file.sysread(15)
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@file.sysread(5).should == "56789"
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end
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it "reads normally even when called immediately after a buffered IO#read" do
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@file.read(15)
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@file.sysread(5).should == "56789"
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end
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it "does not raise error if called after IO#read followed by IO#write" do
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@file.read(5)
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@file.write("abcde")
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lambda { @file.sysread(5) }.should_not raise_error(IOError)
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end
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it "does not raise error if called after IO#read followed by IO#syswrite" do
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@file.read(5)
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@file.syswrite("abcde")
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lambda { @file.sysread(5) }.should_not raise_error(IOError)
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end
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it "reads updated content after the flushed buffered IO#write" do
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@file.write("abcde")
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@file.flush
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@file.sysread(5).should == "56789"
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File.open(@file_name) do |f|
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f.sysread(10).should == "abcde56789"
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end
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end
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it "raises IOError on closed stream" do
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lambda { IOSpecs.closed_io.sysread(5) }.should raise_error(IOError)
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end
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end
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