Merge pull request #22 from netglade/feat/if-empty-and-blank

Add if empty and blank, add tests, remove callbacks

Author: tenhobi

packages/netglade_utils/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.2.0
+- Add `ifEmpty` and `ifBlank` to string extensions.
+- Remove typedefs. (private)
+
 ## 1.1.0
 - Add `isNotNullNorEmpty` to `String?` extension.
 - Fix implementation and doc comments in `string_extensions`.

packages/netglade_utils/lib/src/extensions/future_extensions.dart

@@ -1,12 +1,13 @@
 import 'dart:async';
 
 import 'package:clock/clock.dart';
-import 'package:netglade_utils/src/typedefs/typedefs.dart';
+
+typedef OnTakingTooLongCallback = void Function();
 
 extension FutureExtensions<T> on Future<T> {
   // ignore: comment_references, see https://github.com/dart-lang/linter/issues/2079
   /// If [this] future taking longer than [duration] to execute - [callback] is called.
-  Future<T> onTakingTooLong(Duration duration, VoidCallback callback) async {
+  Future<T> onTakingTooLong(Duration duration, OnTakingTooLongCallback callback) async {
     final timer = Timer(duration, callback);
 
     try {

packages/netglade_utils/lib/src/extensions/string_extensions.dart

@@ -24,6 +24,14 @@ extension StringExtensions on String {
   String lastNCharacters(int limit) {
     return characters.getRange(max(0, length - limit)).toString();
   }
+
+  String? ifEmpty([String? defaultValue]) {
+    return isEmpty ? defaultValue : this;
+  }
+
+  String? ifBlank([String? defaultValue]) {
+    return isBlank ? defaultValue : this;
+  }
 }
 
 extension NullableStringExtensions on String? {
@@ -42,6 +50,11 @@ extension NullableStringExtensions on String? {
     return this?.isBlank ?? true;
   }
 
+  /// Returns negation of [isNullOrBlank].
+  bool get isNotNullNorBlank {
+    return !isNullOrBlank;
+  }
+
   /// Returns negation of [isBlank].
   ///
   /// * String? is blank when it has a value and contains only whitespaces.
@@ -58,4 +71,12 @@ extension NullableStringExtensions on String? {
   bool get isNotNullNorEmpty {
     return !isNullOrEmpty;
   }
+
+  String? ifEmpty([String? defaultValue]) {
+    return (this?.isEmpty ?? false) ? defaultValue : this;
+  }
+
+  String? ifBlank([String? defaultValue]) {
+    return (this?.isBlank ?? false) ? defaultValue : this;
+  }
 }

packages/netglade_utils/lib/src/testing/mock_extensions.dart

@@ -4,7 +4,6 @@ import 'dart:async';
 
 import 'package:mocktail/mocktail.dart';
 import 'package:netglade_utils/src/result/result.dart';
-import 'package:netglade_utils/src/typedefs/typedefs.dart';
 
 extension FutureVoidAnswer on When<Future<void>> {
   void thenAnswerWithVoid() => thenAnswer((_) async => <void>{});
@@ -46,14 +45,14 @@ extension StreamSubscriptionAnswer<T> on When<StreamSubscription<T>> {
   void thenAnswerWithProvidedCallback() => thenAnswer((i) {
         final callback = i.positionalArguments.singleOrNull;
 
-        // ignore: no-empty-block, it needs to be empty
-        return Stream.fromIterable(<T>[]).listen(callback != null ? callback as Setter<T> : (_) {});
+        // ignore: no-empty-block, it needs to be empty, prefer-typedefs-for-callbacks, private API
+        return Stream.fromIterable(<T>[]).listen(callback != null ? callback as void Function(T value) : (_) {});
       });
 
   void thenAnswerWithCustomStream(Stream<T> stream) => thenAnswer((i) {
         final callback = i.positionalArguments.singleOrNull;
 
-        // ignore: no-empty-block, it needs to be empty
-        return stream.listen(callback != null ? callback as Setter<T> : (_) {});
+        // ignore: no-empty-block, it needs to be empty, prefer-typedefs-for-callbacks, private API
+        return stream.listen(callback != null ? callback as void Function(T value) : (_) {});
       });
 }

packages/netglade_utils/lib/src/typedefs/callbacks.dart

@@ -1,5 +1,5 @@
 name: netglade_utils
-version: 1.1.0
+version: 1.2.0
 description: Dart utils used internally at netglade.
 repository: https://github.com/netglade/flutter_core/tree/main/packages/netglade_utils
 issue_tracker: https://github.com/netglade/flutter_core/issues

packages/netglade_utils/lib/src/typedefs/typedefs.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: prefer_const_declarations, unnecessary_nullable_for_final_variable_declarations, omit_local_variable_types
+
 import 'package:netglade_utils/netglade_utils.dart';
 import 'package:test/test.dart';
 
@@ -23,127 +25,259 @@ void main() {
   group('isBlank', () {
     group('on String', () {
       test('empty message is isBlank', () {
-        expect(''.isBlank, isTrue);
+        final String value = '';
+        expect(value.isBlank, isTrue);
       });
 
       test('message with whitespaces is isBlank', () {
-        expect('   '.isBlank, isTrue);
+        final String value = '   ';
+        expect(value.isBlank, isTrue);
       });
 
       test('message with non-whitespace characters is not isBlank', () {
-        expect('xxx'.isBlank, isFalse);
+        final String value = 'xxx';
+        expect(value.isBlank, isFalse);
       });
     });
 
     group('on String?', () {
       test('empty message is isBlank', () {
-        expect(''.isBlank, isTrue);
+        final String? value = '';
+        expect(value.isBlank, isTrue);
       });
 
       test('null message is not isBlank', () {
-        expect(null.isBlank, isFalse);
+        final String? value = null;
+        expect(value.isBlank, isFalse);
       });
 
       test('message with whitespaces is isBlank', () {
-        expect('   '.isBlank, isTrue);
+        final String? value = '   ';
+        expect(value.isBlank, isTrue);
       });
 
       test('message with non-whitespace characters is not isBlank', () {
-        expect('xxx'.isBlank, isFalse);
+        final String? value = 'xxx';
+        expect(value.isBlank, isFalse);
       });
     });
   });
 
   group('isNotBlank', () {
     group('on String', () {
       test('empty message is not isNotBlank', () {
-        expect(''.isNotBlank, isFalse);
+        final String value = '';
+        expect(value.isNotBlank, isFalse);
       });
 
       test('message with whitespaces is not isNotBlank', () {
-        expect('   '.isNotBlank, isFalse);
+        final String value = '   ';
+        expect(value.isNotBlank, isFalse);
       });
 
       test('message with non-whitespace characters is isNotBlank', () {
-        expect('xxx'.isNotBlank, isTrue);
+        final String value = 'xxx';
+        expect(value.isNotBlank, isTrue);
       });
     });
 
     group('on String?', () {
       test('empty message is not isNotBlank', () {
-        expect(''.isNotBlank, isFalse);
+        final String? value = '';
+        expect(value.isNotBlank, isFalse);
       });
 
       test('message is null is isNotBlank', () {
-        expect(null.isNotBlank, isTrue);
+        final String? value = null;
+        expect(value.isNotBlank, isTrue);
       });
 
       test('message has whitespaces is not isNotBlank', () {
-        expect('   '.isNotBlank, isFalse);
+        final String? value = '   ';
+        expect(value.isNotBlank, isFalse);
       });
 
       test('message has non-whitespace characters is isNotBlank', () {
-        expect('xxx'.isNotBlank, isTrue);
+        final String? value = 'xxx';
+        expect(value.isNotBlank, isTrue);
       });
     });
   });
 
   group('isNullOrBlank', () {
     group('on String?', () {
       test('empty message is isNullOrBlank', () {
-        expect(''.isNullOrBlank, isTrue);
+        final String? value = '';
+        expect(value.isNullOrBlank, isTrue);
       });
 
       test('null message is isNullOrBlank', () {
-        expect(null.isNullOrBlank, isTrue);
+        final String? value = null;
+        expect(value.isNullOrBlank, isTrue);
       });
 
       test('message with whitespaces is isNullOrBlank', () {
-        expect('   '.isNullOrBlank, isTrue);
+        final String? value = '   ';
+        expect(value.isNullOrBlank, isTrue);
       });
 
       test('message with non-whitespace characters is not isNullOrBlank', () {
-        expect('xxx'.isNullOrBlank, isFalse);
+        final String? value = 'xxx';
+        expect(value.isNullOrBlank, isFalse);
       });
     });
   });
 
   group('isNullOrEmpty', () {
     group('on String?', () {
       test('empty message is isNullOrEmpty', () {
-        expect(''.isNullOrEmpty, isTrue);
+        final String? value = '';
+        expect(value.isNullOrEmpty, isTrue);
       });
 
       test('null message is isNullOrEmpty', () {
-        expect(null.isNullOrEmpty, isTrue);
+        final String? value = null;
+        expect(value.isNullOrEmpty, isTrue);
       });
 
       test('message with whitespaces is not isNullOrEmpty', () {
-        expect('   '.isNullOrEmpty, isFalse);
+        final String? value = '   ';
+        expect(value.isNullOrEmpty, isFalse);
       });
 
       test('message with non-whitespace characters is not isNullOrEmpty', () {
-        expect('xxx'.isNullOrEmpty, isFalse);
+        final String? value = 'xxx';
+        expect(value.isNullOrEmpty, isFalse);
       });
     });
   });
 
   group('isNotNullNorEmpty', () {
     group('on String?', () {
       test('empty message is not isNotNullNorEmpty', () {
-        expect(''.isNotNullNorEmpty, isFalse);
+        final String? value = '';
+        expect(value.isNotNullNorEmpty, isFalse);
       });
 
       test('null message is not isNotNullNorEmpty', () {
-        expect(null.isNotNullNorEmpty, isFalse);
+        final String? value = null;
+        expect(value.isNotNullNorEmpty, isFalse);
       });
 
       test('message with whitespaces is isNotNullNorEmpty', () {
-        expect('   '.isNotNullNorEmpty, isTrue);
+        final String? value = '   ';
+        expect(value.isNotNullNorEmpty, isTrue);
       });
 
       test('message with non-whitespace characters is isNotNullNorEmpty', () {
-        expect('xxx'.isNotNullNorEmpty, isTrue);
+        final String? value = 'xxx';
+        expect(value.isNotNullNorEmpty, isTrue);
+      });
+    });
+  });
+
+  group('isNotNullNorBlank', () {
+    group('on String?', () {
+      test('empty message is not isNotNullNorBlank', () {
+        final String? value = '';
+        expect(value.isNotNullNorBlank, isFalse);
+      });
+
+      test('null message is not isNotNullNorBlank', () {
+        final String? value = null;
+        expect(value.isNotNullNorBlank, isFalse);
+      });
+
+      test('message with whitespaces is not isNotNullNorBlank', () {
+        final String? value = '   ';
+        expect(value.isNotNullNorBlank, isFalse);
+      });
+
+      test('message with non-whitespace characters is isNotNullNorBlank', () {
+        final String? value = 'xxx';
+        expect(value.isNotNullNorBlank, isTrue);
+      });
+    });
+  });
+
+  group('ifEmpty', () {
+    group('on String', () {
+      test('empty message', () {
+        final String value = '';
+        expect(value.ifEmpty('aaa'), equals('aaa'));
+      });
+
+      test('message with whitespaces', () {
+        final String value = '   ';
+        expect(value.ifEmpty('aaa'), equals(value));
+      });
+
+      test('message with non-whitespace characters', () {
+        final String value = 'xxx';
+        expect(value.ifEmpty('aaa'), equals(value));
+      });
+    });
+
+    group('on String?', () {
+      test('empty message', () {
+        final String? value = '';
+        expect(value.ifEmpty('aaa'), equals('aaa'));
+      });
+
+      test('null message', () {
+        final String? value = null;
+        expect(value.ifEmpty('aaa'), equals(value));
+      });
+
+      test('message with whitespaces', () {
+        final String? value = '   ';
+        expect(value.ifEmpty('aaa'), equals(value));
+      });
+
+      test('message with non-whitespace characters', () {
+        final String? value = 'xxx';
+        expect(value.ifEmpty('aaa'), equals(value));
+      });
+    });
+  });
+
+  group('ifBlank', () {
+    group('on String', () {
+      test('empty message', () {
+        final String value = '';
+        expect(value.ifBlank('aaa'), equals('aaa'));
+      });
+
+      test('message with whitespaces', () {
+        final String value = '   ';
+        expect(value.ifBlank('aaa'), equals('aaa'));
+      });
+
+      test('message with non-whitespace characters', () {
+        final String value = 'xxx';
+        expect(value.ifBlank('aaa'), equals(value));
+      });
+    });
+
+    group('on String?', () {
+      test('empty message', () {
+        final String? value = '';
+        expect(value.ifBlank('aaa'), equals('aaa'));
+      });
+
+      test('null message', () {
+        final String? value = null;
+        expect(value.ifBlank('aaa'), equals(value));
+      });
+
+      test('message with whitespaces', () {
+        final String? value = '   ';
+        expect(value.ifBlank('aaa'), equals('aaa'));
+      });
+
+      test('message with non-whitespace characters', () {
+        final String? value = 'xxx';
+        expect(value.ifBlank('aaa'), equals(value));
       });
     });
   });