privatestaticvoid transferToThenCheckIfAnyClosed(Reader input,
Writer output) throws IOException { try (CloseLoggingReader in = new CloseLoggingReader(input);
CloseLoggingWriter out = new CloseLoggingWriter(output)) { boolean thrown = false; try {
in.transferTo(out);
} catch (IOException ignored) {
thrown = true;
} if (!thrown) thrownew AssertionError();
if (in.wasClosed() || out.wasClosed()) { thrownew AssertionError();
}
}
}
privatestaticvoid onReturnNeitherStreamIsClosed() throws IOException { try (CloseLoggingReader in = new CloseLoggingReader(input(newchar[]{1, 2, 3}));
CloseLoggingWriter out = new CloseLoggingWriter(output())) {
in.transferTo(out);
if (in.wasClosed() || out.wasClosed()) { thrownew AssertionError();
}
}
}
privatestaticvoid onReturnInputIsAtEnd() throws IOException { try (Reader in = input(newchar[]{1, 2, 3});
Writer out = output()) {
in.transferTo(out);
if (in.read() != -1) { thrownew AssertionError();
}
}
}
privatestaticvoid contents() throws IOException {
checkTransferredContents(newchar[0]);
checkTransferredContents(createRandomChars(1024, 4096)); // to span through several batches
checkTransferredContents(createRandomChars(16384, 16384));
}
privatestaticvoid checkTransferredContents(char[] chars) throws IOException { try (Reader in = input(chars);
StringWriter out = new StringWriter()) {
in.transferTo(out);
@Override publicvoid write(int b) throws IOException { if (pos++ == exceptionPosition) thrownew IOException();
}
@Override publicvoid write(char[] chars, int off, int len) throws IOException { for (int i=0; i<len; i++) {
write(chars[off + i]);
}
}
@Override public Writer append(CharSequence csq, int start, int end) throws IOException { for (int i = start; i < end; i++) {
write(csq.charAt(i));
} returnthis;
}
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