# context("fitSpline()")

testthat::test_that("fitSpline works", {
  
  f <- fitSpline( weight ~ height, data = women, df = 5 )
  g <<- fitSpline( length ~ width, data = KidsFeet, type = 'natural', df = 5 )
  h <<- fitSpline( length ~ width, data = KidsFeet, type = 'linear', df = 5 )
  
  wrapped_expect_doppelganger("fitspline1", xyplot( weight ~ height, data = women ))
  wrapped_expect_doppelganger("fitspline2", plotFun(f(height) ~ height, add = TRUE))
  
  # xyplot( length ~ width, data = KidsFeet, col = 'gray70', pch = 16)
  
  wrapped_expect_doppelganger("fitspline3", plotFun(g, add = TRUE, col = 'navy'))
  wrapped_expect_doppelganger("fitspline4", plotFun(h, add = TRUE, col = 'red'))
  
  
})