Adding tests for error conditions

2 files changed, 10 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 2db7476..d0df5ee 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -114,7 +114,7 @@ const DERIVE_KEY_CONTEXT: u8 = 1 << 5;
 const DERIVE_KEY_MATERIAL: u8 = 1 << 6;
 
 /// Errors from parsing hex values
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum ParseError {
     /// Hexadecimal str contains invalid character
     InvalidChar,
diff --git a/src/test.rs b/src/test.rs
index 6883c91..8c77c7f 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -465,4 +465,13 @@ fn test_hex_encoding_decoding() {
     // 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);
 }