tests/testthat/test-generic_statistics.R

In SticsRPacks/CroPlotR: A Package to Analyze Crop Model Simulations Outputs with Plots and Statistics

# Loading the inputs (see test-plot to reproduce the data)
load("_inputs/sim_obs.RData")

test_that("format of statistics", {
  df_stats <-
    statistics(
      sim = sim$`IC_Wheat_Pea_2005-2006_N0`,
      obs = obs$`IC_Wheat_Pea_2005-2006_N0`,
      all_situations = FALSE, formater = format_cropr
    )
  expect_true(is.data.frame(df_stats))
  expect_equal(ncol(df_stats), 39)
  expect_equal(nrow(df_stats), 2)
  expect_equal(df_stats$n_obs, c(8, 10))
})

test_that("statistics with no obs return NULL", {
  df_stats <-
    statistics(
      sim = sim$`IC_Wheat_Pea_2005-2006_N0`, obs = NULL,
      all_situations = FALSE, formater = format_cropr
    )
  expect_true(is.null(df_stats))
})

test_that("statistics summary: one group", {
  # when computing statistics for each situation one by one
  df_stats <- summary(stics_1 = sim, obs = obs, all_situations = FALSE)
  expect_true(is.data.frame(df_stats))
  expect_equal(ncol(df_stats), 41)
  expect_equal(nrow(df_stats), 6)
  expect_equal(unique(df_stats$group), "stics_1")
  expect_equal(length(unique(df_stats$situation)), 3)

  # when computing statistics for all situations simultaneously
  df_stats <- summary(stics_1 = sim, obs = obs, all_situations = TRUE)
  expect_true(is.data.frame(df_stats))
  expect_equal(ncol(df_stats), 41)
  expect_equal(nrow(df_stats), 2)
  expect_equal(unique(df_stats$group), "stics_1")
  expect_equal(length(unique(df_stats$situation)), 1)
})


test_that("statistics summary: three groups", {
  # when computing statistics for each situation one by one
  df_stats <- summary(
    stics_1 = sim, stics_2 = sim, stics_3 = sim, obs = obs,
    all_situations = FALSE
  )
  expect_true(is.data.frame(df_stats))
  expect_equal(ncol(df_stats), 41)
  expect_equal(nrow(df_stats), 18)
  expect_equal(unique(df_stats$group), paste0("stics_", 1:3))
  expect_equal(length(unique(df_stats$situation)), 3)

  # when computing statistics for all situations simultaneously
  df_stats <- summary(
    stics_1 = sim, stics_2 = sim, stics_3 = sim, obs = obs,
    all_situations = TRUE
  )
  expect_true(is.data.frame(df_stats))
  expect_equal(ncol(df_stats), 41)
  expect_equal(nrow(df_stats), 6)
  expect_equal(unique(df_stats$group), paste0("stics_", 1:3))
  expect_equal(length(unique(df_stats$situation)), 1)
})


test_that("statistics summary: no obs", {
  ## when computing statistics for each situation one by one
  df_stats <- summary(stics_1 = sim, obs = NULL, all_situations = FALSE)
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 0)

  df_stats <- summary(
    stics_1 = sim, stics_2 = sim, obs = NULL,
    all_situations = FALSE
  )
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 0)

  # Observations from one USM are missing only:
  obs$`SC_Wheat_2005-2006_N0` <- NULL
  df_stats <- summary(stics_1 = sim, obs = obs, all_situations = FALSE)
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 4)
  expect_true(all(unique(df_stats$situation) %in%
    c("IC_Wheat_Pea_2005-2006_N0", "SC_Pea_2005-2006_N0")))


  ## when computing statistics for all situations simultaneously
  df_stats <- summary(stics_1 = sim, obs = NULL, all_situations = TRUE)
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 0)

  df_stats <- summary(
    stics_1 = sim, stics_2 = sim, obs = NULL,
    all_situations = TRUE
  )
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 0)

  # Observations from one USM are missing only:
  obs$`SC_Wheat_2005-2006_N0` <- NULL
  df_stats <- summary(stics_1 = sim, obs = obs, all_situations = TRUE)
  expect_true(is.data.frame(df_stats))
  expect_equal(nrow(df_stats), 2)
  expect_equal(unique(df_stats$situation), c("all_situations"))
})

if (as.integer(R.version$major) < 4) {
  # IF R version is lower than 4.0.0, use stringsAsFactors = FALSE to match the
  # reference produced with R >= 4.0.0 with stringsAsFactors = FALSE as default
  options(stringsAsFactors = FALSE)
  on.exit(options(stringsAsFactors = TRUE))
}

test_that("statistical criteria", {
  # Each criterion is stored as a vector in "test_stats.RData"
  df_stats <- summary(stics_1 = sim, obs = obs)
  df_stats[, -c(1:3, ncol(df_stats))] <- round(df_stats[, -c(
    1:3,
    ncol(df_stats)
  )], 5)
  expect_snapshot_value(df_stats, style = "json2")
})

if (as.integer(R.version$major) < 4) {
  options(stringsAsFactors = TRUE)
}