fix ResoCoder/issues/27

lukechi1219 · Jun 21, 2020 · c3e94ea · c3e94ea
1 parent 1ae6cd3
commit c3e94ea
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diff --git a/lib/core/util/input_converter.dart b/lib/core/util/input_converter.dart
@@ -9,6 +9,8 @@ class InputConverter {
         throw FormatException();
       }
       return Right(integer);
+    } on ArgumentError {
+      return Left(InvalidInputFailure());
     } on FormatException {
       return Left(InvalidInputFailure());
     }

diff --git a/test/core/util/input_converter_test.dart b/test/core/util/input_converter_test.dart
@@ -22,6 +22,18 @@ void main() {
       },
     );
 
+    test(
+      'should return a Failure when the string is null',
+      () async {
+        // arrange
+        final str = null;
+        // act
+        final result = inputConverter.stringToUnsignedInteger(str);
+        // assert
+        expect(result, Left(InvalidInputFailure()));
+      },
+    );
+
     test(
       'should return a Failure when the string is not an integer',
       () async {