Test read8() and read16().
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@ -29,6 +29,10 @@
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pub use error::Error;
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pub use jpeg::get_exif_attr as get_exif_attr_from_jpeg;
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#[cfg(test)]
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#[macro_use]
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mod tmacro;
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mod error;
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mod jpeg;
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mod util;
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@ -0,0 +1,47 @@
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//
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// Copyright (c) 2016 KAMADA Ken'ichi.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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// SUCH DAMAGE.
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//
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// Macros for testing.
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macro_rules! assert_ok {
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($expr:expr, $value:expr) => (
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match $expr {
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Ok(v) => assert_eq!(v, $value),
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r => panic!("assertion failed: unexpected {:?}", r),
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}
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)
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}
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// This macro is intended to be used with std::io::Error, but other
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// types with kind() will also work.
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macro_rules! assert_err_kind {
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($expr:expr, $kind:expr) => (
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match $expr {
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Err(e) => assert_eq!(e.kind(), $kind),
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r => panic!("assertion failed: unexpected {:?}", r),
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}
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)
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}
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36
src/util.rs
36
src/util.rs
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@ -36,3 +36,39 @@ pub fn read16<R>(reader: &mut R) -> Result<u16, io::Error> where R: io::Read {
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try!(reader.read_exact(&mut buf));
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Ok(((buf[0] as u16) << 8) + buf[1] as u16)
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}
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#[cfg(test)]
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mod tests {
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use std::io::Cursor;
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use std::io::ErrorKind;
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use std::io::Read;
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use super::*;
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#[test]
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fn read8_len() {
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let mut reader = Cursor::new([]);
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assert_err_kind!(read8(&mut reader), ErrorKind::UnexpectedEof);
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let mut reader = Cursor::new([0x01]);
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assert_ok!(read8(&mut reader), 0x01);
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let mut reader = Cursor::new([0x01, 0x02]);
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let mut buf = Vec::new();
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assert_ok!(read8(&mut reader), 0x01);
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assert_ok!(reader.read_to_end(&mut buf), 1);
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assert_eq!(buf, [0x02]);
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}
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#[test]
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fn read16_len() {
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let mut reader = Cursor::new([]);
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assert_err_kind!(read16(&mut reader), ErrorKind::UnexpectedEof);
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let mut reader = Cursor::new([0x01]);
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assert_err_kind!(read16(&mut reader), ErrorKind::UnexpectedEof);
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let mut reader = Cursor::new([0x01, 0x02]);
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assert_ok!(read16(&mut reader), 0x0102);
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let mut reader = Cursor::new([0x01, 0x02, 0x03]);
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let mut buf = Vec::new();
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assert_ok!(read16(&mut reader), 0x0102);
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assert_ok!(reader.read_to_end(&mut buf), 1);
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assert_eq!(buf, [0x03]);
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}
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}
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