tests/testthat/test-cchousing_tbl_df.R

In educationR: A Comprehensive Collection of Educational Datasets

# educationR - A Comprehensive Collection of Educational Datasets
# Version 0.1.0
# Copyright (C) 2024 Renzo Cáceres 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.
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# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# cchousing_tbl_df data set

library(testthat)

# Test structure and class of cchousing_tbl_df
test_that("cchousing_tbl_df has the expected structure and class", {
  expect_s3_class(cchousing_tbl_df, "tbl_df")  # Verify it is a tibble
  expect_equal(class(cchousing_tbl_df), c("tbl_df", "tbl", "data.frame"))
  expect_equal(length(cchousing_tbl_df), 1)  # It should have 1 column
  expect_equal(names(cchousing_tbl_df), c("price"))
})

# Test column type
test_that("cchousing_tbl_df column has the correct type", {
  expect_type(cchousing_tbl_df$price, "double")  # price should be numeric (double)
})

# Test range and values of "price" column
test_that("cchousing_tbl_df$price values are valid", {
  expect_true(all(cchousing_tbl_df$price >= 0, na.rm = TRUE),
              info = "price should be non-negative")
  expect_true(all(!is.na(cchousing_tbl_df$price)),
              info = "price should not have missing values")
})

# Test dataset immutability
test_that("cchousing_tbl_df remains unchanged after tests", {
  # Create a deep copy of the original dataset before tests
  original_dataset <- cchousing_tbl_df

  # Perform some example checks (ensuring no accidental changes)
  expect_true(all(!is.na(cchousing_tbl_df$price)), info = "price should not have missing values")

  # Verify the dataset hasn't changed
  expect_identical(original_dataset, cchousing_tbl_df)
  expect_equal(names(original_dataset), names(cchousing_tbl_df))
  expect_equal(length(original_dataset), length(cchousing_tbl_df))
})