/**
  * @covers ilRoomSharingFileUtils::isTXTType
  */
 public function testIsTXTType()
 {
     self::assertTrue(UTILS::isTXTType("text/plain"));
     self::assertTrue(UTILS::isTXTType("text/richtext"));
     self::assertTrue(UTILS::isTXTType("text/rtf"));
     // Negative cases
     self::assertFalse(UTILS::isTXTType("file/podf"));
     self::assertFalse(UTILS::isTXTType(""));
     self::assertFalse(UTILS::isTXTType(12));
     self::assertFalse(UTILS::isTXTType(NULL));
     self::assertFalse(UTILS::isTXTType(1));
 }
 /**
  * Returns true if the given mime type is allowed for the room agreement file.
  *
  * @param string $a_mimeType
  *
  * @return boolean
  */
 private function isAllowedFileType($a_mimeType)
 {
     $isImage = ilRoomSharingFileUtils::isImageType($a_mimeType);
     $isPDF = ilRoomSharingFileUtils::isPDFType($a_mimeType);
     $isTXT = ilRoomSharingFileUtils::isTXTType($a_mimeType);
     return $isImage || $isPDF || $isTXT;
 }