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v/vlib/io/io_cp_test.v

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import io
import os
fn test_cp() ? {
mut f := os.open(@FILE) or { panic(err) }
defer {
f.close()
}
mut r := io.new_buffered_reader(reader: f)
mut stdout := os.stdout()
io.cp(mut r, mut stdout) ?
assert true
}