increase bytestring test coverage

bytestring/src/lib.rs

@@ -11,7 +11,7 @@ use alloc::{
     string::{String, ToString},
     vec::Vec,
 };
-use core::{borrow, convert::TryFrom, fmt, hash, ops, str};
+use core::{borrow::Borrow, convert::TryFrom, fmt, hash, ops, str};
 
 use bytes::Bytes;
 
@@ -132,13 +132,12 @@ impl ops::Deref for ByteString {
     #[inline]
     fn deref(&self) -> &str {
         let bytes = self.0.as_ref();
-        // SAFETY:
+        // SAFETY: UTF-8 validity is guaranteed during construction.
-        // UTF-8 validity is guaranteed at during construction.
         unsafe { str::from_utf8_unchecked(bytes) }
     }
 }
 
-impl borrow::Borrow<str> for ByteString {
+impl Borrow<str> for ByteString {
     fn borrow(&self) -> &str {
         self
     }
@@ -292,7 +291,7 @@ mod serde {
 
 #[cfg(test)]
 mod test {
-    use alloc::borrow::ToOwned;
+    use alloc::{borrow::ToOwned, format, vec};
     use core::{
         hash::{Hash, Hasher},
         panic::{RefUnwindSafe, UnwindSafe},
@@ -309,7 +308,7 @@ mod test {
     assert_impl_all!(ByteString: UnwindSafe, RefUnwindSafe);
 
     #[test]
-    fn test_partial_eq() {
+    fn eq() {
         let s: ByteString = ByteString::from_static("test");
         assert_eq!(s, "test");
         assert_eq!(s, *"test");
@@ -317,12 +316,45 @@ mod test {
     }
 
     #[test]
-    fn test_new() {
+    fn new() {
         let _: ByteString = ByteString::new();
     }
 
     #[test]
-    fn test_hash() {
+    fn as_bytes() {
+        let buf = ByteString::new();
+        assert!(buf.as_bytes().is_empty());
+
+        let buf = ByteString::from("hello");
+        assert_eq!(buf.as_bytes(), "hello");
+    }
+
+    #[test]
+    fn from_bytes_unchecked() {
+        let buf = unsafe { ByteString::from_bytes_unchecked(Bytes::new()) };
+        assert!(buf.is_empty());
+
+        let buf = unsafe { ByteString::from_bytes_unchecked(Bytes::from("hello")) };
+        assert_eq!(buf, "hello");
+    }
+
+    #[test]
+    fn as_ref() {
+        let buf = ByteString::new();
+
+        let _: &ByteString = buf.as_ref();
+        let _: &[u8] = buf.as_ref();
+    }
+
+    #[test]
+    fn borrow() {
+        let buf = ByteString::new();
+
+        let _: &str = buf.borrow();
+    }
+
+    #[test]
+    fn hash() {
         let mut hasher1 = AHasher::default();
         "str".hash(&mut hasher1);
 
@@ -333,7 +365,7 @@ mod test {
     }
 
     #[test]
-    fn test_from_string() {
+    fn from_string() {
         let s: ByteString = "hello".to_owned().into();
         assert_eq!(&s, "hello");
         let t: &str = s.as_ref();
@@ -341,23 +373,30 @@ mod test {
     }
 
     #[test]
-    fn test_from_str() {
+    fn from_str() {
         let _: ByteString = "str".into();
+        let _: ByteString = "str".to_owned().into_boxed_str().into();
     }
 
     #[test]
-    fn test_from_static_str() {
+    fn to_string() {
+        let buf = ByteString::from("foo");
+        assert_eq!(String::from(buf), "foo");
+    }
+
+    #[test]
+    fn from_static_str() {
         static _S: ByteString = ByteString::from_static("hello");
         let _ = ByteString::from_static("str");
     }
 
     #[test]
-    fn test_try_from_slice() {
+    fn try_from_slice() {
         let _ = ByteString::try_from(b"nice bytes").unwrap();
     }
 
     #[test]
-    fn test_try_from_array() {
+    fn try_from_array() {
         assert_eq!(
             ByteString::try_from([b'h', b'i']).unwrap(),
             ByteString::from_static("hi")
@@ -365,25 +404,43 @@ mod test {
     }
 
     #[test]
-    fn test_try_from_bytes() {
+    fn try_from_vec() {
+        let _ = ByteString::try_from(vec![b'f', b'o', b'o']).unwrap();
+        ByteString::try_from(vec![0, 159, 146, 150]).unwrap_err();
+    }
+
+    #[test]
+    fn try_from_bytes() {
         let _ = ByteString::try_from(Bytes::from_static(b"nice bytes")).unwrap();
     }
 
     #[test]
-    fn test_try_from_bytes_mut() {
+    fn try_from_bytes_mut() {
         let _ = ByteString::try_from(bytes::BytesMut::from(&b"nice bytes"[..])).unwrap();
     }
 
+    #[test]
+    fn display() {
+        let buf = ByteString::from("bar");
+        assert_eq!(format!("{buf}"), "bar");
+    }
+
+    #[test]
+    fn debug() {
+        let buf = ByteString::from("baz");
+        assert_eq!(format!("{buf:?}"), r#""baz""#);
+    }
+
     #[cfg(feature = "serde")]
     #[test]
-    fn test_serialize() {
+    fn serialize() {
         let s: ByteString = serde_json::from_str(r#""nice bytes""#).unwrap();
         assert_eq!(s, "nice bytes");
     }
 
     #[cfg(feature = "serde")]
     #[test]
-    fn test_deserialize() {
+    fn deserialize() {
         let s = serde_json::to_string(&ByteString::from_static("nice bytes")).unwrap();
         assert_eq!(s, r#""nice bytes""#);
     }
@@ -399,7 +456,7 @@ mod test {
 
     #[test]
     #[should_panic]
-    fn test_slice_ref_catches_not_a_subset() {
+    fn slice_ref_catches_not_a_subset() {
         // panics because the given slice is not derived from the original byte string, despite
         // being a logical subset of the string
         ByteString::from_static("foo bar").slice_ref("foo");