🐛 Fix the PR cover checker when there is no test

src/MercadoPago/Test/pull-request-coverage-checker.php

@@ -9,7 +9,21 @@
     $filename = str_replace('/', '\\', $filename);
     $filename = str_replace('.php', '', $filename);
 
-    $pullRequestFiles[] = $filename;
+    if (is_testable($filename)) {
+        $pullRequestFiles[] = $filename;
+    }
+}
+
+function is_testable($filename): bool {
+
+    $whitelist = [
+        0 => 'pull-request-coverage-checker',
+        1 => 'coverage-checker',
+        2 => 'registration',
+        //TODO: add all untestable php files
+    ];
+
+    return in_array($filename, $whitelist) ? false : true;
 }
 
 if (!file_exists($cloverFile)) {
@@ -20,11 +34,6 @@
     throw new InvalidArgumentException('An integer checked percentage must be given as second parameter');
 }
 
-if (count($pullRequestFiles) == 0) {
-    print_r('Pull Request does not contain any php file to check code coverage');
-    return;
-}
-
 $xml             = new SimpleXMLElement(file_get_contents($cloverFile));
 $classes         = $xml->xpath('//class');
 $totalElements   = 0;
@@ -38,7 +47,10 @@
 }
 
 if ($totalElements == 0 || $checkedElements == 0) {
-    print_r('Pull Request does not contain tested php files to check code coverage');
+    if (count($pullRequestFiles) === 0) {
+        throw new Exception('Pull Request does not contain tested php files to check code coverage');
+    }
+    print_r('Pull Request does not contain any php file to check code coverage');
     return;
 }