public void Changing_file_name_extension_without_dot_add_dot_to_the_extension()
{
// assert
const string fileName = "de353a17-66ef-46f0-8a24-6ac4a4f6f89c.tmp";
const string newExtensionFileName = "de353a17-66ef-46f0-8a24-6ac4a4f6f89c.txt";
// act
using (var file = new TemporaryFile(fileName))
{
File.WriteAllText(fileName, "Anything");
File.Exists(fileName).Should().BeTrue();
file.ChangeExtensionTo("txt");
// assert
file.FileInfo.Name.Should().Be(newExtensionFileName);
File.Exists(fileName).Should().BeFalse();
File.Exists(newExtensionFileName).Should().BeTrue();
}
File.Exists(fileName).Should().BeFalse();
File.Exists(newExtensionFileName).Should().BeFalse();
}