created email validator

Author: jrushlow

src/Validator.php

@@ -167,6 +167,15 @@ public static function validateDoctrineFieldName(string $name, ManagerRegistry $
         return $name;
     }
 
+    public static function validateEmailAddress(string $email): string
+    {
+        if (!\filter_var($email, FILTER_VALIDATE_EMAIL)) {
+            throw new RuntimeCommandException(\sprintf('"%s" is not a valid email address.', $email));
+        }
+
+        return $email;
+    }
+
     public static function existsOrNull(string $className = null, array $entities = [])
     {
         if (null !== $className) {

tests/ValidatorTest.php

@@ -65,6 +65,15 @@ public function testValidateClassName()
         $this->assertSame('Foo', Validator::validateClassName('Foo'));
     }
 
+    public function testValidateEmailAddress()
+    {
+        $this->assertSame('[email protected]', Validator::validateEmailAddress('[email protected]'));
+
+        $this->expectException(RuntimeCommandException::class);
+        $this->expectExceptionMessage('"badEmail" is not a valid email address.');
+        Validator::validateEmailAddress('badEmail');
+    }
+
     public function testInvalidClassName()
     {
         $this->expectException(RuntimeCommandException::class);