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* io: implement MultiReader struct Implement a MultiReader (InStream) which sequentially read from the provided readers (InStreams). Return IoError.EOF when all of the readers are read. * io: implement MultiWriter struct Implement a MultiWriter (OutStream). The MultiWriter duplicates its writes to all the provided writers (OutStream). * io: implement TeeReader struct Implement a TeeReader (InStream) which reads from a wrapped reader (InStream) and writes data to the provided writer (OutStream).
18 lines
412 B
Plaintext
18 lines
412 B
Plaintext
module std::io @test;
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fn void! test_multiwriter()
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{
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ByteWriter w1, w2;
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MultiWriter mw;
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mw.temp_init(w1.temp_init(), w2.temp_init());
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defer mw.free();
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String want = "foobar";
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io::copy_to(ByteReader{}.init(want), &mw)!;
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assert(w1.str_view() == want,
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"invalid write; got: %s, want: %s", w1.str_view(), want);
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assert(w2.str_view() == want,
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"invalid write; got: %s, want: %s", w2.str_view(), want);
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}
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