Nothing

```
test_that("guess for empty strings is logical", {
expect_equal(guess_parser(c("", "")), "logical")
})
test_that("guess for missing vector is logical", {
expect_equal(guess_parser(NA_character_), "logical")
})
test_that("empty + NA ignored when determining type", {
expect_equal(guess_parser(c("1", "")), "double")
expect_equal(guess_parser(c("1", NA)), "double")
})
test_that("guess decimal commas with correct locale", {
expect_equal(guess_parser("1,300"), "number")
expect_equal(guess_parser("1,300", locale(decimal_mark = ",")), "double")
})
# Numbers -----------------------------------------------------------------
test_that("only accept numbers with grouping mark", {
expect_equal(guess_parser("1,300"), "number")
expect_equal(guess_parser("1,300.00"), "number")
})
# Concise collectors specification ----------------------------------------
test_that("_ or - skips column", {
out1 <- read_csv(I("x,y\n1,2\n3,4"), col_types = "-i")
out2 <- read_csv(I("x,y\n1,2\n3,4"), col_types = "_i")
expect_equal(names(out1), "y")
expect_equal(names(out2), "y")
})
test_that("? guesses column type", {
out1 <- read_csv(I("x,y\n1,2\n3,4"), col_types = "?i")
expect_equal(out1$x, c(1L, 3L))
})
test_that("f parses factor (#810)", {
out <- read_csv(I("x,y\na,2\nb,4"), col_types = "fi")
expect_s3_class(out$x, "factor")
})
```

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