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require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))
class Timeval < FFI::Struct
layout :tv_sec, :ulong, 0, :tv_usec, :ulong, 4
end
module LibC
extend FFI::Library
ffi_lib FFI::Library::LIBC
attach_function :gettimeofday, [:pointer, :pointer], :int
end
describe FFI::Library, "#attach_function" do
it "correctly returns a value for gettimeofday" do
t = Timeval.new
time = LibC.gettimeofday(t.pointer, nil)
time.should be_kind_of(Integer)
end
it "correctly populates a struct for gettimeofday" do
t = Timeval.new
time = LibC.gettimeofday(t.pointer, nil)
t[:tv_sec].should be_kind_of(Numeric)
t[:tv_usec].should be_kind_of(Numeric)
end
end
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