Strings recipes for the Dart Cookbook

recipes/test/core/strings/finding_regexp_matches_test.dart

+library finding_regexp_matches;
+
+import 'package:unittest/unittest.dart';
+
+void main() {
+  group('finding regExp matches', () {
+    var neverEatingThat = 'Not with a fox, not in a box';
+    var regExp = new RegExp(r'[fb]ox');
+    
+    test('using allMatches()', () {
+      List matches = regExp.allMatches(neverEatingThat);
+      expect(matches.map((match) => match.group(0)).toList(), equals(['fox', 'box'])); 
+      // Finding the number of occurences of a subneverEatingThat.
+      expect(matches.length, equals(2));
+    });
+
+    test('using firstMatch()', () {
+      expect(regExp.firstMatch(neverEatingThat).group(0), equals('fox'));
+    });
+    
+    test('using neverEatingThatMatch', () {
+      expect(regExp.stringMatch(neverEatingThat), equals('fox'));
+      expect(regExp.stringMatch('I like bagels and lox'), isNull);
+    });
+  });
+}
+