Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
rust: str: add `CStr` unit tests
Add unit tests for `CStr::from_bytes_with_nul()` and
`CStr::from_bytes_with_nul_unchecked()`.
These serve as an example of the first unit tests for Rust code
(i.e. different from documentation tests).
Signed-off-by: Milan Landaverde <milan@mdaverde.com>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
authored by
Milan Landaverde
and committed by
Miguel Ojeda
985f1f09
c07e67bd
+29
+29
rust/kernel/str.rs
+29
rust/kernel/str.rs
···
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_cstr_to_str() {
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let good_bytes = b"\xf0\x9f\xa6\x80\0";
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let checked_cstr = CStr::from_bytes_with_nul(good_bytes).unwrap();
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let checked_str = checked_cstr.to_str().unwrap();
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assert_eq!(checked_str, "🦀");
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}
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#[test]
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#[should_panic]
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fn test_cstr_to_str_panic() {
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let bad_bytes = b"\xc3\x28\0";
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let checked_cstr = CStr::from_bytes_with_nul(bad_bytes).unwrap();
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checked_cstr.to_str().unwrap();
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}
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#[test]
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fn test_cstr_as_str_unchecked() {
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let good_bytes = b"\xf0\x9f\x90\xA7\0";
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let checked_cstr = CStr::from_bytes_with_nul(good_bytes).unwrap();
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let unchecked_str = unsafe { checked_cstr.as_str_unchecked() };
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assert_eq!(unchecked_str, "🐧");
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}
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}
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/// Allows formatting of [`fmt::Arguments`] into a raw buffer.
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///
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/// It does not fail if callers write past the end of the buffer so that they can calculate the