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context("complain")
test_that("NULL return unchanged", {
expect_identical(complain(NULL), NULL)
})
test_that("can't access non-existent list members", {
x1 <- list(y = 1)
x2 <- complain(x1)
expect_equal(x2$y, 1)
expect_error(x2$z, "object 'z' not found")
expect_error(x2[["z"]], "object 'z' not found")
})
test_that("can't access non-existent environment components", {
x1 <- list2env(list(y = 1))
x2 <- complain(x1)
expect_equal(x2$y, 1)
expect_error(x2$z, "object 'z' not found")
expect_error(x2[["z"]], "object 'z' not found")
})
test_that("can't use non-character vectors", {
x <- complain(list(y = 1))
expect_error(x[[1]], "subset with a string")
expect_error(x[[c("a", "b")]], "subset with a string")
})
test_that("complain doesn't taint env class", {
x1 <- list2env(list(y = 1))
x2 <- complain(x1)
expect_equal(class(x1), "environment")
expect_equal(class(x2), c("complain", "environment"))
})
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