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43 lines
1 KiB
Ruby
43 lines
1 KiB
Ruby
# -*- encoding: utf-8 -*-
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require_relative '../../spec_helper'
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platform_is_not :windows do
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describe "IO#pwrite" do
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before :each do
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@fname = tmp("io_pwrite.txt")
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@file = File.open(@fname, "w+")
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end
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after :each do
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@file.close
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rm_r @fname
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end
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it "returns the number of bytes written" do
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@file.pwrite("foo", 0).should == 3
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end
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it "accepts a string and an offset" do
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@file.pwrite("foo", 2)
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@file.pread(3, 2).should == "foo"
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end
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it "does not advance the pointer in the file" do
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@file.pwrite("bar", 3)
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@file.write("foo")
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@file.pread(6, 0).should == "foobar"
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end
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it "raises IOError when file is not open in write mode" do
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File.open(@fname, "r") do |file|
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-> { file.pwrite("foo", 1) }.should raise_error(IOError)
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end
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end
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it "raises IOError when file is closed" do
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file = File.open(@fname, "w+")
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file.close
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-> { file.pwrite("foo", 1) }.should raise_error(IOError)
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end
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end
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end
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