fix(ratio): handle NaNs

Signed-off-by: Sphericalkat <[email protected]>

Author: SphericalKat

lib/ratios/simple_ratio.dart

@@ -4,6 +4,10 @@ import '../diffutils/diff_utils.dart';
 class SimpleRatio implements Applicable {
   @override
   int apply(String s1, String s2) {
-    return (100 * DiffUtils.getRatio(s1, s2)).round();
+    final diff = DiffUtils.getRatio(s1, s2);
+    if (diff.isNaN) {
+      return 0;
+    }
+    return (diff * 100).round();
   }
 }

test/fuzzywuzzy_test.dart

@@ -60,6 +60,11 @@ void main() {
           'the quick brown fox jumps over the small lazy dog');
       expect(result, 97);
     });
+
+    test('Weighted ratio with newlines', () {
+      final result = weightedRatio('\n \n  ', 'test');
+      expect(result, 0);
+    });
   });
 
   group('Extractors', () {