feat(matcher): allow regex string to be parsed as regex (#2324)

* feat(matcher): allow regex string to be parsed as regex

* dont use startsWith

* fix

lib/commons/matches/from-primative.js

@@ -6,6 +6,7 @@
  * match.fromPrimative('foo', ['foo', 'bar']) // true, string is included
  * match.fromPrimative('foo', /foo/) // true, string matches regex
  * match.fromPrimative('foo', str => str.toUpperCase() === 'FOO') // true, function return is truthy
+ * match.fromPrimative('foo', '/foo/') // true, string matches regex string
  * ```
  *
  * @private
@@ -24,6 +25,11 @@ function fromPrimative(someString, matcher) {
 	if (matcher instanceof RegExp) {
 		return matcher.test(someString);
 	}
+	// matcher starts and ends with "/"
+	if (/^\/.*\/$/.test(matcher)) {
+		const pattern = matcher.substring(1, matcher.length - 1);
+		return new RegExp(pattern).test(someString);
+	}
 	return matcher === someString;
 }
 

test/commons/matches/from-primative.js

@@ -77,4 +77,13 @@ describe('matches.fromPrimative', function() {
 			assert.isFalse(fromPrimative('foobar', /^(foo|bar|baz)$/));
 		});
 	});
+
+	describe('with RegExp string', function() {
+		it('returns true if the regexp matches', function() {
+			assert.isTrue(fromPrimative('bar', '/^(foo|bar|baz)$/'));
+		});
+		it('returns false if the regexp does not match', function() {
+			assert.isFalse(fromPrimative('foobar', '/^(foo|bar|baz)$/'));
+		});
+	});
 });