tests/testthat/test-plot.foreccomb_res.R

In ForecastComb: Forecast Combination Methods

context("plot.foreccomb_res")

test_that("Forward wrong input to plot", {
  expect_error(plot.foreccomb_res(1))
  expect_error(plot.foreccomb_res("abs"))
  expect_error(plot.foreccomb_res(list(a=1, b=2)))
  expect_error(plot.foreccomb_res(NULL))
  expect_error(plot.foreccomb_res(NA))
  expect_error(plot.foreccomb_res(Inf))
  expect_error(plot.foreccomb_res(-Inf))
})

test_that("Tests for the correctness of the plot function, when only train set is used", {
  set.seed(5)
  obs <- rnorm(100)
  preds <- matrix(rnorm(1000, 1), 100, 10)
  train_o<-obs[1:80]
  train_p<-preds[1:80,]
  
  data<-foreccomb(train_o, train_p)
  result<-comb_EIG1(data)
  
  plot_object <- plot(result)
  
  expect_s3_class(plot_object, class = c("gg", "ggplot"))
})

test_that( "Check for correct class type and accuracy, when test set is used", {
  set.seed(5)
  obs <- rnorm(100)
  preds <- matrix(rnorm(1000, 1), 100, 10)
  train_o<-obs[1:80]
  train_p<-preds[1:80,]
  test_o<-obs[81:100]
  test_p<-preds[81:100,]
  
  data<-foreccomb(train_o, train_p, test_o, test_p)
  result<-comb_EIG1(data)
  
  plot_object <- plot(result)
  
  expect_s3_class(plot_object, class = c("gg", "ggplot"))
})