tests/testthat/test-count.R

In stringr: Simple, Consistent Wrappers for Common String Operations

test_that("counts are as expected", {
  fruit <- c("apple", "banana", "pear", "pineapple")
  expect_equal(str_count(fruit, "a"), c(1, 3, 1, 1))
  expect_equal(str_count(fruit, "p"), c(2, 0, 1, 3))
  expect_equal(str_count(fruit, "e"), c(1, 0, 1, 2))
  expect_equal(str_count(fruit, c("a", "b", "p", "n")), c(1, 1, 1, 1))
})

test_that("uses tidyverse recycling rules", {
  expect_error(str_count(1:2, 1:3), class = "vctrs_error_incompatible_size")
})

test_that("can use fixed() and coll()", {
  expect_equal(str_count("x.", fixed(".")), 1)
  expect_equal(str_count("\u0131", turkish_I()), 1)
})

test_that("can count boundaries", {
  # str_count(x, boundary()) == lengths(str_split(x, boundary()))
  expect_equal(str_count("a b c", ""), 5)
  expect_equal(str_count("a b c", boundary("word")), 3)
})