fix: change file extensions to lowercase before validation

Author: streamtw

src/LfmUploadValidator.php

@@ -74,7 +74,7 @@ public function mimetypeIsNotExcutable($excutable_mimetypes)
 
     public function extensionIsNotExcutable($excutable_extensions)
     {
-        $extension = $this->file->getClientOriginalExtension();
+        $extension = strtolower($this->file->getClientOriginalExtension());
 
         if (in_array($extension, $excutable_extensions)) {
             throw new ExcutableFileException();

tests/LfmUploadValidatorTest.php

@@ -136,6 +136,42 @@ public function testFailsMimeTypeIsValid()
         $validator->mimeTypeIsValid(['image/png']);
     }
 
+    public function testPassesExtensionIsNotExcutable()
+    {
+        $uploaded_file = m::mock(UploadedFile::class);
+        $uploaded_file->shouldReceive('getClientOriginalExtension')->andReturn('jpeg');
+
+        $validator = new LfmUploadValidator($uploaded_file);
+
+        $this->expectNotToPerformAssertions();
+
+        $validator->extensionIsNotExcutable(['php', 'html']);
+    }
+
+    public function testFailsExtensionIsNotExcutable()
+    {
+        $uploaded_file = m::mock(UploadedFile::class);
+        $uploaded_file->shouldReceive('getClientOriginalExtension')->andReturn('html');
+
+        $validator = new LfmUploadValidator($uploaded_file);
+
+        $this->expectException(ExcutableFileException::class);
+
+        $validator->extensionIsNotExcutable(['php', 'html']);
+    }
+
+    public function testFailsExtensionIsNotExcutableWithExtensionNotLowerCase()
+    {
+        $uploaded_file = m::mock(UploadedFile::class);
+        $uploaded_file->shouldReceive('getClientOriginalExtension')->andReturn('Html');
+
+        $validator = new LfmUploadValidator($uploaded_file);
+
+        $this->expectException(ExcutableFileException::class);
+
+        $validator->extensionIsNotExcutable(['php', 'html']);
+    }
+
     public function testPassesSizeIsLowerThanConfiguredMaximum()
     {
         $uploaded_file = m::mock(UploadedFile::class);