feat(string_extensions): add addHttps()

Author: Jens Becker

README.md

@@ -50,6 +50,8 @@ All features with links to their page in the documentation:
       Whether the string is a valid strong password.
     - #### [toNullIfBlank()](https://pub.dev/documentation/fleasy/latest/fleasy/NullableStringExtensions/toNullIfBlank.html)
       Returns null if the string `isBlank` or it's text if it `isNotBlank`.
+    - #### [addHttps()](https://pub.dev/documentation/fleasy/latest/fleasy/StringExtensions/addHttps.html)
+        Adds https:// to the link if it does not contain https:// or http:// already. This is helpful to make a link openable when using the [url_launcher](https://pub.dev/packages/url_launcher) package for example.
 
 
 - ### Extensions on `DateTime`:

lib/src/extensions/string_extensions.dart

@@ -52,6 +52,13 @@ extension StringExtensions on String {
   /// - at least 1 number
   /// - at least 1 special character
   bool get isStrongPassword => _strongPasswordRegExp.hasMatch(this);
+
+  /// Adds https:// to the link if it does not contain https:// or http:// already..
+  ///
+  /// This is helpful to make a link openable when using the [url_launcher](https://pub.dev/packages/url_launcher) package for example.
+  String addHttps() {
+    return contains('https://') || contains('http://') ? this : 'https://$this';
+  }
 }
 
 extension NullableStringExtensions on String? {

test/string_extensions_test.dart

@@ -159,4 +159,24 @@ void main() {
       expect(password.isStrongPassword, equals(false));
     });
   });
+
+  group('addHttps', () {
+    test('adds https:// when there is no http:// or https://.', () {
+      const url = 'www.jensbecker.dev';
+
+      expect(url.addHttps(), equals('https://www.jensbecker.dev'));
+    });
+
+    test('does not add https:// when there is http:// already.', () {
+      const url = 'http://www.jensbecker.dev';
+
+      expect(url.addHttps(), equals(url));
+    });
+
+    test('does not add https:// when there is https:// already.', () {
+      const url = 'https://www.jensbecker.dev';
+
+      expect(url.addHttps(), equals(url));
+    });
+  });
 }