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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
79 lines
2 KiB
Ruby
79 lines
2 KiB
Ruby
# -*- encoding: utf-8 -*-
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require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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require File.expand_path('../shared/pos', __FILE__)
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describe "IO#seek" do
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it_behaves_like :io_set_pos, :seek
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end
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describe "IO#seek" do
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before :each do
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@io = IOSpecs.io_fixture "lines.txt"
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end
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after :each do
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@io.close unless @io.closed?
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end
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it "moves the read position relative to the current position with SEEK_CUR" do
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lambda { @io.seek(-1) }.should raise_error(Errno::EINVAL)
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@io.seek(10, IO::SEEK_CUR)
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@io.readline.should == "igne une.\n"
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@io.seek(-5, IO::SEEK_CUR)
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@io.readline.should == "une.\n"
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end
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it "moves the read position relative to the start with SEEK_SET" do
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@io.seek(1)
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@io.pos.should == 1
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@io.rewind
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@io.seek(43, IO::SEEK_SET)
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@io.readline.should == "Aquí está la línea tres.\n"
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@io.seek(5, IO::SEEK_SET)
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@io.readline.should == " la ligne une.\n"
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end
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it "moves the read position relative to the end with SEEK_END" do
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@io.seek(0, IO::SEEK_END)
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@io.tell.should == 137
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@io.seek(-25, IO::SEEK_END)
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@io.readline.should == "cinco.\n"
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end
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it "moves the read position and clears EOF with SEEK_SET" do
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value = @io.read
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@io.seek(0, IO::SEEK_SET)
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@io.eof?.should == false
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value.should == @io.read
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end
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it "moves the read position and clears EOF with SEEK_CUR" do
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value = @io.read
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@io.seek(-1, IO::SEEK_CUR)
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@io.eof?.should == false
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value[-1].should == @io.read[0]
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end
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it "moves the read position and clears EOF with SEEK_END" do
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value = @io.read
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@io.seek(-1, IO::SEEK_END)
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@io.eof?.should == false
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value[-1].should == @io.read[0]
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end
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platform_is :darwin do
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it "supports seek offsets greater than 2^32" do
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begin
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zero = File.open('/dev/zero')
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offset = 2**33
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zero.seek(offset, File::SEEK_SET)
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pos = zero.pos
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pos.should == offset
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ensure
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zero.close rescue nil
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end
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end
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end
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end
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