ENGCOM-5233: GraphQl-673: isEmailAvailable test coverage #706

 - Merge Pull Request magento/graphql-ce#706 from magento/graphql-ce:673-isEmailAvailable_tests
 - Merged commits:
   1. a90b493
   2. 7e71a40
   3. 0c843c8
   4. fa1acbb
   5. 7cd32cf

Author: magento-engcom-team

app/code/Magento/CustomerGraphQl/Model/Resolver/IsEmailAvailable.php

@@ -13,6 +13,7 @@
 use Magento\Framework\GraphQl\Exception\GraphQlInputException;
 use Magento\Framework\GraphQl\Query\ResolverInterface;
 use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Framework\Validator\EmailAddress as EmailValidator;
 
 /**
  * Is Customer Email Available
@@ -24,13 +25,21 @@ class IsEmailAvailable implements ResolverInterface
      */
     private $accountManagement;
 
+    /**
+     * @var EmailValidator
+     */
+    private $emailValidator;
+
     /**
      * @param AccountManagementInterface $accountManagement
+     * @param EmailValidator $emailValidator
      */
     public function __construct(
-        AccountManagementInterface $accountManagement
+        AccountManagementInterface $accountManagement,
+        EmailValidator $emailValidator
     ) {
         $this->accountManagement = $accountManagement;
+        $this->emailValidator = $emailValidator;
     }
 
     /**
@@ -47,6 +56,10 @@ public function resolve(
             throw new GraphQlInputException(__('Email must be specified'));
         }
 
+        if (!$this->emailValidator->isValid($args['email'])) {
+            throw new GraphQlInputException(__('Email is invalid'));
+        }
+
         try {
             $isEmailAvailable = $this->accountManagement->isEmailAvailable($args['email']);
         } catch (LocalizedException $e) {

dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/IsEmailAvailableTest.php

@@ -9,6 +9,9 @@
 
 use Magento\TestFramework\TestCase\GraphQlAbstract;
 
+/**
+ * Test email availability functionality
+ */
 class IsEmailAvailableTest extends GraphQlAbstract
 {
     /**
@@ -31,6 +34,9 @@ public function testEmailNotAvailable()
         self::assertFalse($response['isEmailAvailable']['is_email_available']);
     }
 
+    /**
+     * Verify email availability
+     */
     public function testEmailAvailable()
     {
         $query =
@@ -47,4 +53,55 @@ public function testEmailAvailable()
         self::assertArrayHasKey('is_email_available', $response['isEmailAvailable']);
         self::assertTrue($response['isEmailAvailable']['is_email_available']);
     }
+
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage GraphQL response contains errors: Email must be specified
+     */
+    public function testEmailAvailableEmptyValue()
+    {
+        $query =
+            <<<QUERY
+{
+  isEmailAvailable(email: "") {
+    is_email_available
+  }
+}
+QUERY;
+        $this->graphQlQuery($query);
+    }
+
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage Field "isEmailAvailable" argument "email" of type "String!" is required
+     */
+    public function testEmailAvailableMissingValue()
+    {
+        $query =
+            <<<QUERY
+{
+  isEmailAvailable {
+    is_email_available
+  }
+}
+QUERY;
+        $this->graphQlQuery($query);
+    }
+
+    /**
+     * @expectedException \Exception
+     * @expectedExceptionMessage GraphQL response contains errors: Email is invalid
+     */
+    public function testEmailAvailableInvalidValue()
+    {
+        $query =
+            <<<QUERY
+{
+  isEmailAvailable(email: "invalid-email") {
+    is_email_available
+  }
+}
+QUERY;
+        $this->graphQlQuery($query);
+    }
 }