pkg/tests/testthat/test.computeFilaments.R

   1 context("Check that computeFilaments behaves as expected")
   2
   3 #shorthand: map 1->1, 2->2, 3->3, 4->1, ..., 149->2, 150->3
   4 I = function(i)
   5     (i-1) %% 3 + 1
   6
   7 #MOCK data; NOTE: could be in inst/testdata as well
   8 getDataTest = function(n)
   9 {
  10     data = Data$new()
  11     x = seq(0,10,0.1)
  12     L = length(x)
  13     s1 = cos(x)
  14     s2 = sin(x)
  15     s3 = c( s1[1:(L%/%2)] , s2[(L%/%2+1):L] )
  16     #sum((s1-s2)^2) == 97.59381
  17     #sum((s1-s3)^2) == 57.03051
  18     #sum((s2-s3)^2) == 40.5633
  19     s = list( s1, s2, s3 )
  20     series = list()
  21     for (i in seq_len(n))
  22     {
  23         serie = s[[I(i)]] + rnorm(L,sd=0.01)
  24         level = mean(serie)
  25         serie = serie - level
  26         # 10 series with NAs for index 2
  27         if (I(i) == 2 && i >= 60 && i<= 90)
  28             serie[sample(seq_len(L),1)] = NA
  29         data$append(c(), serie, level, c(), c()) #no need for more
  30     }
  31     data
  32 }
  33
  34 test_that("output is as expected on simulated series",
  35 {
  36     data = getDataTest(150)
  37
  38     # index 143 : serie type 2
  39     f = computeFilaments(data, 143, limit=60, plot=FALSE)
  40     # Expected output: 23 series of type 3 (closer), then 50-3-10 series of type 2, then 143
  41     expect_identical(length(f$indices), as.integer(61)) #61 because result also contain today
  42     expect_identical(length(f$colors),  as.integer(61))
  43     expect_true(all(I(f$indices) >= 2))
  44     for (i in 1:23)
  45     {
  46         expect_equal(I(f$indices[i]), 3)
  47         expect_match(f$colors[i], f$colors[1])
  48     }
  49     for (i in 24:60)
  50     {
  51         expect_equal(I(f$indices[i]), 2)
  52         expect_match(f$colors[i], f$colors[24])
  53     }
  54     expect_equal(f$indices[61], 143)
  55     expect_match(f$colors[61], "#FF0000") #special color: current day in red
  56     expect_match(f$colors[1], "#E*")
  57     expect_match(f$colors[24], "#1*")
  58
  59     # index 142 : serie type 1
  60     f = computeFilaments(data, 142, limit=50, plot=FALSE)
  61     # Expected output: 13 series of type 3 (closer), then 50-10-3 series of type 1, then 142
  62     # NOTE: -10 because only past days with no-NAs tomorrow => exclude type 1 in [60,90[
  63     expect_identical(length(f$indices), as.integer(51))
  64     expect_identical(length(f$colors), as.integer(51))
  65     expect_true(all(I(f$indices) != 2))
  66     for (i in 1:13)
  67     {
  68         expect_equal(I(f$indices[i]), 3)
  69         expect_match(f$colors[i], f$colors[1])
  70     }
  71     for (i in 14:50)
  72     {
  73         expect_equal(I(f$indices[i]), 1)
  74         expect_match(f$colors[i], f$colors[14])
  75     }
  76     expect_equal(f$indices[51], 142)
  77     expect_match(f$colors[51], "#FF0000")
  78     expect_match(f$colors[1], "#E*")
  79     expect_match(f$colors[14], "#1*")
  80 })