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Merge branch 'post-08' into post-09

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Philipp Oppermann
2019-05-23 12:39:35 +02:00
parent 64d1a587e7 bbeb63ec3d
commit 67ee45090d
1 changed files with 10 additions and 8 deletions
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18
tests/panic_handler.rs
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@@ -46,26 +46,28 @@ fn check_location(info: &PanicInfo) {
fn check_message(info: &PanicInfo) {
let message = info.message().unwrap_or_else(|| fail("no message"));
let mut compare_message = CompareMessage { equals: false };
let mut compare_message = CompareMessage { expected: MESSAGE };
write!(&mut compare_message, "{}", message).unwrap_or_else(|_| fail("write failed"));
if !compare_message.equals {
fail("message not equal to expected message");
if compare_message.expected.len() != 0 {
fail("message shorter than expected message");
}
}
/// Compares a `fmt::Arguments` instance with the `MESSAGE` string
///
/// To use this type, write the `fmt::Arguments` instance to it using the
/// `write` macro. If a message component matches `MESSAGE`, the equals
/// field is set to true.
/// `write` macro. If the message component matches `MESSAGE`, the `expected`
/// field is the empty string.
struct CompareMessage {
equals: bool,
expected: &'static str,
}
impl fmt::Write for CompareMessage {
fn write_str(&mut self, s: &str) -> fmt::Result {
if s == MESSAGE {
self.equals = true;
if self.expected.starts_with(s) {
self.expected = &self.expected[s.len()..];
} else {
fail("message not equal to expected message");
}
Ok(())
}