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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "IO#initialize" do
before :each do
@name = tmp("io_initialize.txt")
@io = new_io @name
end
after :each do
@io.close unless @io.closed?
rm_r @name
end
it "reassociates the IO instance with the new descriptor when passed a Fixnum" do
# This leaks one file descriptor. Do NOT write this spec to
# call IO.new with the fd of an existing IO instance.
fd = new_fd @name, "r:utf-8"
@io.send :initialize, fd, 'r'
@io.fileno.should == fd
end
it "calls #to_int to coerce the object passed as an fd" do
# This leaks one file descriptor. Do NOT write this spec to
# call IO.new with the fd of an existing IO instance.
obj = mock('fileno')
fd = new_fd @name, "r:utf-8"
obj.should_receive(:to_int).and_return(fd)
@io.send :initialize, obj, 'r'
@io.fileno.should == fd
end
it "raises a TypeError when passed an IO" do
lambda { @io.send :initialize, STDOUT, 'w' }.should raise_error(TypeError)
end
it "raises a TypeError when passed nil" do
lambda { @io.send :initialize, nil, 'w' }.should raise_error(TypeError)
end
it "raises a TypeError when passed a String" do
lambda { @io.send :initialize, "4", 'w' }.should raise_error(TypeError)
end
it "raises IOError on closed stream" do
lambda { @io.send :initialize, IOSpecs.closed_io.fileno }.should raise_error(IOError)
end
it "raises an Errno::EBADF when given an invalid file descriptor" do
lambda { @io.send :initialize, -1, 'w' }.should raise_error(Errno::EBADF)
end
end
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