diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/bytes_count_to_len.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/bytes_count_to_len.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/bytes_count_to_len.rs b/src/tools/clippy/tests/ui/bytes_count_to_len.rs new file mode 100644 index 000000000..162730c28 --- /dev/null +++ b/src/tools/clippy/tests/ui/bytes_count_to_len.rs @@ -0,0 +1,34 @@ +// run-rustfix +#![warn(clippy::bytes_count_to_len)] +use std::fs::File; +use std::io::Read; + +fn main() { + // should fix, because type is String + let _ = String::from("foo").bytes().count(); + + let s1 = String::from("foo"); + let _ = s1.bytes().count(); + + // should fix, because type is &str + let _ = "foo".bytes().count(); + + let s2 = "foo"; + let _ = s2.bytes().count(); + + // make sure using count() normally doesn't trigger warning + let vector = [0, 1, 2]; + let _ = vector.iter().count(); + + // The type is slice, so should not fix + let _ = &[1, 2, 3].bytes().count(); + + let bytes: &[u8] = &[1, 2, 3]; + bytes.bytes().count(); + + // The type is File, so should not fix + let _ = File::open("foobar").unwrap().bytes().count(); + + let f = File::open("foobar").unwrap(); + let _ = f.bytes().count(); +} |