Adding a test for the test send email button

Author: escopecz

Diff for: Tests/Functional/Mailer/Transport/SparkpostTransportTest.php

@@ -89,6 +89,43 @@ function ($method, $url, $options): MockResponse {
         Assert::assertSame('', $email->getReplyTo()[0]->getName());
     }
 
+    public function testTestTransportButton(): void
+    {
+        $expectedResponses = [
+            function ($method, $url, $options): MockResponse {
+                Assert::assertSame(Request::METHOD_POST, $method);
+                Assert::assertSame('https://api.sparkpost.com/api/v1/utils/content-previewer/', $url);
+                $this->assertSparkpostTestRequestBody($options['body']);
+
+                return new MockResponse('{"results": {"subject": "Hello there!", "html": "This is test body for {contactfield=email}!"}}');
+            },
+            function ($method, $url, $options): MockResponse {
+                Assert::assertSame(Request::METHOD_POST, $method);
+                Assert::assertSame('https://api.sparkpost.com/api/v1/transmissions/', $url);
+                $this->assertSparkpostTestRequestBody($options['body']);
+
+                return new MockResponse('{"results": {"total_rejected_recipients": 0, "total_accepted_recipients": 1, "id": "11668787484950529"}}');
+            },
+        ];
+
+        /** @var MockHttpClient $mockHttpClient */
+        $mockHttpClient = self::getContainer()->get(HttpClientInterface::class);
+        $mockHttpClient->setResponseFactory($expectedResponses);
+        $this->client->request(Request::METHOD_GET, '/s/ajax?action=email:sendTestEmail');
+        Assert::assertTrue($this->client->getResponse()->isOk());
+        Assert::assertSame('{"success":1,"message":"Success!"}', $this->client->getResponse()->getContent());
+    }
+
+    private function assertSparkpostTestRequestBody(string $body): void
+    {
+        $bodyArray = json_decode($body, true);
+        Assert::assertSame('Admin <[email protected]>', $bodyArray['content']['from']);
+        Assert::assertNull($bodyArray['content']['html']);
+        Assert::assertSame('[email protected]', $bodyArray['content']['reply_to']);
+        Assert::assertSame('Mautic test email', $bodyArray['content']['subject']);
+        Assert::assertSame('Hi! This is a test email from Mautic. Testing...testing...1...2...3!', $bodyArray['content']['text']);
+    }
+
     private function assertSparkpostRequestBody(string $body): void
     {
         $bodyArray = json_decode($body, true);