MS SQL get dates from previous week (DATEADD and DATEDIFF)

MS SQL get dates from previous week (DATEADD and DATEDIFF)

SELECT    salesDate
        , customerName
        , productName
        , salesQty
        , salesQty * productPrice as 'Total'
  FROM testDB.dbo.salesDaily
    INNER JOIN testDB.dbo.customers ON testDB.dbo.customers.custId = customerId AND customerName = 'Customer2'
    INNER JOIN testDB.dbo.products ON testDB.dbo.products.prodId = productId
  WHERE salesDate >= DATEADD(WK, DATEDIFF(WK, 0, GETDATE()) - 1, 0)
    AND salesDate < DATEADD(WK, DATEDIFF(WK, 0, GETDATE()), 0)