67 lines
1.2 KiB
V
67 lines
1.2 KiB
V
module io
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fn test_multi_writer_write_successful() {
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w0 := TestWriter{}
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w1 := TestWriter{}
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mut mw := new_multi_writer(w0, w1)
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n := mw.write('0123456789'.bytes()) or {
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assert false
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return
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}
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assert n == 10
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assert w0.bytes == '0123456789'.bytes()
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assert w1.bytes == '0123456789'.bytes()
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}
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fn test_multi_writer_write_incomplete() {
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w0 := TestWriter{}
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w1 := TestIncompleteWriter{}
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mut mw := new_multi_writer(w0, w1)
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n := mw.write('0123456789'.bytes()) or {
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assert w0.bytes == '0123456789'.bytes()
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assert w1.bytes == '012345678'.bytes()
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return
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}
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assert false
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}
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fn test_multi_writer_write_error() {
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w0 := TestWriter{}
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w1 := TestErrorWriter{}
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w2 := TestWriter{}
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mut mw := new_multi_writer(w0, w1, w2)
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n := mw.write('0123456789'.bytes()) or {
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assert w0.bytes == '0123456789'.bytes()
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assert w2.bytes == []
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return
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}
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assert false
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}
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struct TestWriter {
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pub mut:
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bytes []byte
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}
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fn (mut w TestWriter) write(buf []byte) ?int {
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w.bytes << buf
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return buf.len
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}
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struct TestIncompleteWriter {
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pub mut:
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bytes []byte
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}
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fn (mut w TestIncompleteWriter) write(buf []byte) ?int {
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b := buf[..buf.len - 1]
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w.bytes << b
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return b.len
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}
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struct TestErrorWriter {}
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fn (mut w TestErrorWriter) write(buf []byte) ?int {
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return error('error writer errored')
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}
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