pkg/tests/testthat/test.computeFilaments.R

   1 context("Check that computeFilaments behaves as expected")
   2
   3 test_that("output is as expected on simulated series",
   4 {
   5     x = seq(0,10,0.1)
   6     L = length(x)
   7     s1 = cos(x)
   8     s2 = sin(x)
   9     s3 = c( s1[1:(L%/%2)] , s2[(L%/%2+1):L] )
  10     #sum((s1-s2)^2) == 97.59381
  11     #sum((s1-s3)^2) == 57.03051
  12     #sum((s2-s3)^2) == 40.5633
  13     s = list( s1, s2, s3 )
  14     n = 150
  15     series = list()
  16     for (i in seq_len(n))
  17     {
  18         index = (i%%3) + 1
  19         level = mean(s[[index]])
  20         serie = s[[index]] - level + rnorm(L,sd=0.05)
  21         # 10 series with NAs for index 2
  22         if (index == 2 && i >= 60 && i<= 90)
  23             serie[sample(seq_len(L),1)] = NA
  24         series[[i]] = list("level"=level,"serie"=serie) #no need for more
  25     }
  26     data = new("Data", data=series)
  27
  28     # index 142 : serie type 2
  29     f2 = computeFilaments(data, 142, limit=60, plot=FALSE)
  30     # Expected output: 22 series of type 3 (closer), then 50-2-10 series of type 2
  31     #
  32     #
  33     #
  34     #
  35     #
  36     #
  37     # Simulate shift at origin when predict_at > 0
  38     series[2:(n+1)] = series[1:n]
  39     series[[1]] = list("level"=0, "serie"=s[[1]][1:(L%/%2)])
  40     # index 143 : serie type 3
  41     f3 = computeFilaments(data, 143, limit=70, plot=FALSE)
  42     # Expected output: 22 series of type 2 (closer) then 50-2 series of type 3
  43     # ATTENTION au shift
  44     #
  45     #
  46     # index 144 : serie type 1
  47     f1 = computeFilaments(data, 144, limit=50, plot=FALSE)
  48     # Expected output: 2 series of type 3 (closer), then 50-2 series of type 1
  49     #
  50     expect_that( diff_norm, is_less_than(0.5) )
  51 })