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context("String length")
test_that("str_length is number of characters", {
expect_that(str_length("a"), equals(1))
expect_that(str_length("ab"), equals(2))
expect_that(str_length("abc"), equals(3))
})
test_that("str_length of missing string is missing", {
expect_that(str_length(NA), equals(NA_integer_))
expect_that(str_length(c(NA, 1)), equals(c(NA, 1)))
expect_that(str_length("NA"), equals(2))
})
test_that("str_length of factor is length of level", {
expect_that(str_length(factor("a")), equals(1))
expect_that(str_length(factor("ab")), equals(2))
expect_that(str_length(factor("abc")), equals(3))
})
|
