public void FileUploadIncorrectTest()
{
//Arrange
var fileMock = new Mock <IFormFile>();
var content = "Content";
var fileName = "test.pdf";
var contentType = "Pdf";
var ms = new MemoryStream();
var writer = new StreamWriter(ms);
writer.Write(content);
writer.Flush();
ms.Position = 0;
fileMock.Setup(_ => _.OpenReadStream()).Returns(ms);
fileMock.Setup(_ => _.FileName).Returns(fileName);
fileMock.Setup(_ => _.ContentType).Returns(contentType);
fileMock.Setup(_ => _.Length).Returns(ms.Length);
var iFormFileFake = fileMock.Object;
FileUpload upload = new FileUpload("C:\\Users\\Ondrej\\source\\repos\\OndrejMicina\\eshop\\eshop\\wwwroot", "Tests", "image");
//Act
var result = upload.CheckFileContent(iFormFileFake);
//ocakava false
Assert.False(result);
}