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test_that("returns the correct linting", {
msg_escape_char <- rex::rex("is an unrecognized escape in character string")
expect_lint('"\\R"', msg_escape_char)
expect_lint('"\\A"', msg_escape_char)
expect_lint('"\\z"', msg_escape_char)
placeholder_linter <- function(...) NULL
class(placeholder_linter) <- "linter"
attr(placeholder_linter, "name") <- "null"
expect_lint(
"a <- 1
function() {
b",
rex::rex("unexpected end of input"),
placeholder_linter
)
linter <- equals_na_linter()
expect_lint("x=", rex::rex("unexpected end of input"), linter)
expect_lint("x += 1", rex::rex("unexpected '='"), linter)
expect_lint("{x = }", rex::rex("unexpected '}'"), linter)
expect_lint("x = ;", rex::rex("unexpected ';'"), linter)
# no parsing error is expected for the equals-assignment in this code
expect_lint("purrr::partial(list, 1, ... = , 2)", NULL, linter)
# trigger error with base only, and extract it to match against
# what comes out from expect_lint.
get_base_message <- function(e) {
rex::re_substitutes(
data = conditionMessage(e),
pattern = rex::rex(
list(start, "<text>:", any_digits, ":", any_digits, ": ") %or%
list(newline, anything, newline, anything, end)
),
replacement = "",
global = TRUE
)
}
expected_message <- tryCatch(parse(text = "\\"), error = get_base_message)
expect_lint("\\", rex::rex(expected_message))
msg_zero_length_var <- rex::rex("attempt to use zero-length variable name")
expect_lint("``", msg_zero_length_var)
expect_lint("``()", msg_zero_length_var)
expect_lint("''()", msg_zero_length_var)
expect_lint('""()', msg_zero_length_var)
expect_lint("fun(''=42)", msg_zero_length_var)
expect_lint('fun(""=42)', msg_zero_length_var)
expect_lint('fun(a=1,""=42)', msg_zero_length_var)
})
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