test double text mime

src/MessageBodyCollection.php

@@ -404,7 +404,7 @@ private function extractFromMimePart(MultiPartInterface $parts): void
                 continue;
             }
 
-            if ($contentType === 'text/plain' && $disposition === 'inline') {
+            if ((!$this->text || $this->text->isEmpty()) && $contentType === 'text/plain' && $disposition === 'inline') {
                 $this->text = AlternativeText::fromEncodedText((string)new MimeBodyDecodedStream($part), $charset);
                 continue;
             }

test/Stub/MessageBodyCollection/double-text.eml

@@ -0,0 +1,23 @@
+Subject: Hello World
+To: me <me@example.com>
+Cc: other <other@example.com>
+MIME-Version: 1.0
+Content-Type:
+ multipart/mixed; boundary=Apple-Mail-E26EA4FA-4B4F-4801-BEB2-43B254B76FDF
+Content-Transfer-Encoding: 7bit
+
+--Apple-Mail-E26EA4FA-4B4F-4801-BEB2-43B254B76FDF
+Content-Type: text/plain;
+	charset=us-ascii
+Content-Transfer-Encoding: quoted-printable
+
+Hello World
+
+--Apple-Mail-E26EA4FA-4B4F-4801-BEB2-43B254B76FDF
+Content-Type: text/plain;
+	charset=us-ascii
+Content-Transfer-Encoding: 7bit
+
+Another Text
+
+--Apple-Mail-E26EA4FA-4B4F-4801-BEB2-43B254B76FDF--

test/Unit/MessageBodyCollectionTest.php

@@ -639,4 +639,26 @@ public function it_should_extract_the_first_html_part(): void
             $messageBodyCollection->getHtml()
         );
     }
+
+    /**
+     * @test
+     */
+    public function it_should_extract_the_first_text_part(): void
+    {
+        $messageBodyCollection = MessageBodyCollection::extract(
+            GenericMessage::fromString(
+                \file_get_contents(__DIR__ . '/../Stub/MessageBodyCollection/double-text.eml')
+            )
+        );
+
+        $this->assertStringNotContainsString(
+            'Another Text',
+            $messageBodyCollection->getText()->getRaw()
+        );
+
+        $this->assertStringContainsString(
+            'Hello World',
+            $messageBodyCollection->getText()->getRaw()
+        );
+    }
 }