public async Task GetStorageDriveTestAsync(StorageUnit unit, double input, double expected)
{
const string drive = "sda/dev1";
fixture.Customize(new SystemStorageCustomization(unit, input));
SystemController mockController = fixture.Build <SystemController>()
.OmitAutoProperties()
.Create();
Collection <StorageResult> result = await mockController.GetStorageDriveAsync(drive);
// Value at time of writing was 5. Should always be more than 1.
Assert.Single(result);
Assert.Equal(expected, result[0].TotalSpace);
}