# agridatasets - A Comprehensive Collection of Agricultural and Agronomic Datasets
# Version 0.1.0
# Copyright (C) 2026 Renzo Caceres Rossi
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# blackgrass_herbicide

library(testthat)

# Test 1: Check that the object is a tibble/data.frame and has 7 columns
test_that("blackgrass_herbicide is a tibble data.frame with 7 columns", {
  expect_s3_class(blackgrass_herbicide, "tbl_df")
  expect_s3_class(blackgrass_herbicide, "tbl")
  expect_s3_class(blackgrass_herbicide, "data.frame")
  expect_equal(ncol(blackgrass_herbicide), 7)
  expect_equal(length(blackgrass_herbicide), 7)
})

# Test 2: Check the number of rows
test_that("blackgrass_herbicide has 135 rows", {
  expect_equal(nrow(blackgrass_herbicide), 135)
})

# Test 3: Validate column names
test_that("blackgrass_herbicide has correct column names", {
  expect_named(
    blackgrass_herbicide,
    c("ID", "Rep", "DPot", "Population", "Type", "Herbicide", "Fwt")
  )
})

# Test 4: Check data types
test_that("blackgrass_herbicide has correct data types", {
  expect_s3_class(blackgrass_herbicide$ID, "factor")
  expect_equal(nlevels(blackgrass_herbicide$ID), 135)
  expect_s3_class(blackgrass_herbicide$Rep, "factor")
  expect_equal(nlevels(blackgrass_herbicide$Rep), 5)
  expect_s3_class(blackgrass_herbicide$DPot, "factor")
  expect_equal(nlevels(blackgrass_herbicide$DPot), 27)
  expect_s3_class(blackgrass_herbicide$Population, "factor")
  expect_equal(nlevels(blackgrass_herbicide$Population), 9)
  expect_s3_class(blackgrass_herbicide$Type, "factor")
  expect_equal(nlevels(blackgrass_herbicide$Type), 2)
  expect_s3_class(blackgrass_herbicide$Herbicide, "factor")
  expect_equal(nlevels(blackgrass_herbicide$Herbicide), 3)
  expect_type(blackgrass_herbicide$Fwt, "double")
})