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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "IO#advise" do
before :each do
@io = IOSpecs.io_fixture "lines.txt"
end
after :each do
@io.close unless @io.closed?
end
it "raises a TypeError if advise is not a Symbol" do
-> {
@io.advise("normal")
}.should raise_error(TypeError)
end
it "raises a TypeError if offset cannot be coerced to an Integer" do
-> {
@io.advise(:normal, "wat")
}.should raise_error(TypeError)
end
it "raises a TypeError if len cannot be coerced to an Integer" do
-> {
@io.advise(:normal, 0, "wat")
}.should raise_error(TypeError)
end
it "raises a RangeError if offset is too big" do
-> {
@io.advise(:normal, 10 ** 32)
}.should raise_error(RangeError)
end
it "raises a RangeError if len is too big" do
-> {
@io.advise(:normal, 0, 10 ** 32)
}.should raise_error(RangeError)
end
it "raises a NotImplementedError if advise is not recognized" do
->{
@io.advise(:foo)
}.should raise_error(NotImplementedError)
end
it "supports the normal advice type" do
@io.advise(:normal).should be_nil
end
it "supports the sequential advice type" do
@io.advise(:sequential).should be_nil
end
it "supports the random advice type" do
@io.advise(:random).should be_nil
end
it "supports the dontneed advice type" do
@io.advise(:dontneed).should be_nil
end
it "supports the noreuse advice type" do
@io.advise(:noreuse).should be_nil
end
platform_is_not :linux do
it "supports the willneed advice type" do
@io.advise(:willneed).should be_nil
end
end
platform_is :linux do
it "supports the willneed advice type" do
require 'etc'
uname = if Etc.respond_to?(:uname)
Etc.uname[:release]
else
`uname -r`.chomp
end
if (uname.split('.').map(&:to_i) <=> [3,6]) < 0
skip "[ruby-core:65355] tmpfs is not supported"
else
@io.advise(:willneed).should be_nil
end
end
end
it "raises an IOError if the stream is closed" do
@io.close
-> { @io.advise(:normal) }.should raise_error(IOError)
end
end
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