[5.4] Add test for validation of ratio with no fractional part (#17980)

* Convert fixtures to PNG format

* Add test for validation of ratio with no fractional part

tests/Validation/ValidationValidatorTest.php

@@ -217,8 +217,8 @@ public function testClassBasedCustomReplacers()
 
     public function testNestedAttributesAreReplacedInDimensions()
     {
-        // Knowing that demo image.gif has width = 3 and height = 2
-        $uploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/image.gif', '', null, null, null, true);
+        // Knowing that demo image.png has width = 3 and height = 2
+        $uploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/image.png', '', null, null, null, true);
 
         $trans = $this->getIlluminateArrayTranslator();
         $trans->addLines(['validation.dimensions' => ':min_width :max_height :ratio'], 'en');
@@ -1895,8 +1895,8 @@ public function testValidateImage()
 
     public function testValidateImageDimensions()
     {
-        // Knowing that demo image.gif has width = 3 and height = 2
-        $uploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/image.gif', '', null, null, null, true);
+        // Knowing that demo image.png has width = 3 and height = 2
+        $uploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/image.png', '', null, null, null, true);
         $trans = $this->getIlluminateArrayTranslator();
 
         $v = new Validator($trans, ['x' => 'file'], ['x' => 'dimensions']);
@@ -1944,8 +1944,16 @@ public function testValidateImageDimensions()
         $v = new Validator($trans, ['x' => $uploadedFile], ['x' => 'dimensions:ratio=1']);
         $this->assertTrue($v->fails());
 
+        // Knowing that demo image2.png has width = 4 and height = 2
+        $uploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/image2.png', '', null, null, null, true);
+        $trans = $this->getIlluminateArrayTranslator();
+
+        // Ensure validation doesn't erroneously fail when ratio has no fractional part
+        $v = new Validator($trans, ['x' => $uploadedFile], ['x' => 'dimensions:ratio=2/1']);
+        $this->assertTrue($v->passes());
+
         // This test fails without suppressing warnings on getimagesize() due to a read error.
-        $emptyUploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/empty.gif', '', null, null, null, true);
+        $emptyUploadedFile = new \Symfony\Component\HttpFoundation\File\UploadedFile(__DIR__.'/fixtures/empty.png', '', null, null, null, true);
         $trans = $this->getIlluminateArrayTranslator();
 
         $v = new Validator($trans, ['x' => $emptyUploadedFile], ['x' => 'dimensions:min_width=1']);