public void Should_Throw_Exception_If_Directory_Has_Subdirectories()
{
// arrange
var workingDirectory = TestFileSystem.CreateTempWorkingDirectory();
TestFileSystem.CreateSubdirectory(baseDirectory: workingDirectory, subdirectoryName: "subdir");
var rule = new SubdirectoriesValidationRule();
// act & assert
Action action = () => rule.Validate(workingDirectory);
action.ShouldThrow <DirectoryHasSubdirectoriesException>()
.WithMessage("Directory with database scripts must have no subdirectories");
}