Improve compatibility with handling lower case letters

Author: marshallku

src/lib.rs

@@ -40,6 +40,10 @@ pub fn compress_sequence(sequence: &str) -> Vec<u8> {
             'C' => C_BITS,
             'T' => T_BITS,
             'G' => G_BITS,
+            'a' => A_BITS,
+            'c' => C_BITS,
+            't' => T_BITS,
+            'g' => G_BITS,
             _ => panic!("Invalid SEQUENCE!"),
         };
 

tests/compression.rs

@@ -77,6 +77,15 @@ mod tests {
         assert_eq!(dna_sequence, decompressed);
     }
 
+    #[test]
+    fn test_lower_case() {
+        let dna_sequence = "acgt";
+        let compressed = compress_sequence(dna_sequence);
+        let decompressed = decompress_sequence(&compressed);
+
+        assert_eq!(dna_sequence.to_uppercase(), decompressed);
+    }
+
     #[test]
     #[should_panic]
     fn test_invalid_sequence() {