tests/testthat/test_1-0-0-major-coalesce.R

In HughParsonage/hutils: Miscellaneous R Functions and Aliases

context("test-1-0-0-major-coalesce.R")

# dplyr coalesce
# https://github.com/tidyverse/dplyr/blob/master/tests/testthat/test-coalesce.R
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test_that("coalesce replaces 'easy' types", {
  x <- c(NA, 1:5)
  xL <- as.logical(x)
  expect_identical(coalesce(xL, TRUE), rep_len(TRUE, 6L))
  expect_identical(coalesce(x, 0L), 0:5)
  expect_identical(coalesce(as.double(x), 1.5), c(1.5, 1:5))
  expect_identical(coalesce(as.double(x), 1.5), c(1.5, 1:5))
  
})

test_that("non-missing scalar replaces all missing values", {
  x <- c(NA, 1)
  expect_equal(coalesce(x, 1), c(1, 1))
})

test_that("finds non-missing values in multiple positions", {
  x1 <- c(1L, NA, NA)
  x2 <- c(NA, 2L, NA)
  x3 <- c(NA, NA, 3L)
  
  expect_identical(coalesce(x1, x2, x3), 1:3)
})

test_that("Type mismatch", {
  expect_error(coalesce(c(NA, 1:5), as.character(1:6)))
})

test_that("Return x if nothing NA", {
  x <- rnorm(10)
  expect_equal(coalesce(x), x)
  expect_equal(coalesce(x, "Doesn't matter"), x)
})

test_that("Type mismatch", {
  expect_error(coalesce(c(NA, 1:5), as.character(1:6)))
})