feat: Add --digest CLI option to select digest type

src/tests.rs

@@ -57,6 +57,37 @@ mod tests {
             cmd,
             output.status
         );
+
+        // Test with digest option
+        let cmd = format!("echo {} | {} --digest sha256 -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
+
+        let cmd = format!("echo {} | {} --digest md5 -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
+
+        let cmd = format!("echo {} | {} --digest program -p md5sum -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
     }
 
     // Helper function to check if a file exists in the data directory