merge "Adding from_hex and implementing FromStr for Hash"

https://github.com/BLAKE3-team/BLAKE3/pull/24

1 files changed, 26 insertions, 0 deletions

diff --git a/src/test.rs b/src/test.rs
index eefb1a3..6156185 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -567,3 +567,29 @@ fn test_join_lengths() {
     );
     assert_eq!(CUSTOM_JOIN_CALLS.load(Ordering::SeqCst), 1);
 }
+
+#[test]
+fn test_hex_encoding_decoding() {
+    let digest_str = "04e0bb39f30b1a3feb89f536c93be15055482df748674b00d26e5a75777702e9";
+    let mut hasher = crate::Hasher::new();
+    hasher.update(b"foo");
+    let digest = hasher.finalize();
+    assert_eq!(digest.to_hex().as_str(), digest_str);
+
+    // Test round trip
+    let digest = crate::Hash::from_hex(digest_str).unwrap();
+    assert_eq!(digest.to_hex().as_str(), digest_str);
+
+    // Test string parsing via FromStr
+    let digest: crate::Hash = digest_str.parse().unwrap();
+    assert_eq!(digest.to_hex().as_str(), digest_str);
+
+    // Test errors
+    let bad_len = "04e0bb39f30b1";
+    let result = crate::Hash::from_hex(bad_len).unwrap_err();
+    assert_eq!(result, crate::ParseError::InvalidLen);
+
+    let bad_char = "Z4e0bb39f30b1a3feb89f536c93be15055482df748674b00d26e5a75777702e9";
+    let result = crate::Hash::from_hex(bad_char).unwrap_err();
+    assert_eq!(result, crate::ParseError::InvalidChar);
+}