tests/testthat/_snaps/select.md

In hadley/dplyr: A Grammar of Data Manipulation

grouping variables preserved with a message, unless already selected (#1511, #5841)

Code
  res <- select(df, x)
Message
  Adding missing grouping variables: `g`

Code
  expect_equal(df %>% select(a = c), tibble(b = 2, a = 3) %>% group_by(b))
Message
  Adding missing grouping variables: `b`
Code
  expect_equal(df %>% select(b = c), tibble(a = 1, b = 3) %>% group_by(a))
Message
  Adding missing grouping variables: `a`

non-syntactic grouping variable is preserved (#1138)

Code
  df <- tibble(`a b` = 1L) %>% group_by(`a b`) %>% select()
Message
  Adding missing grouping variables: `a b`

select() provides informative errors

Code
  (expect_error(select(mtcars, 1 + "")))
Output
  <error/rlang_error>
  Error in `select()`:
  i In argument: `1 + ""`.
  Caused by error in `1 + ""`:
  ! non-numeric argument to binary operator

dplyr_col_select() aborts when [ implementation is broken

Code
  (expect_error(select(df1, 1:2)))
Output
  <error/vctrs_error_subscript_oob>
  Error in `select()`:
  ! Can't select columns past the end.
  i Location 2 doesn't exist.
  i There is only 1 column.
Code
  (expect_error(select(df1, 0)))
Output
  <error/rlang_error>
  Error in `select()`:
  ! Can't reconstruct data frame.
  x The `[` method for class <dplyr_test_broken_operator/tbl_df/tbl/data.frame> must return a data frame.
  i It returned a <list>.

Code
  (expect_error(select(df1, 2)))
Output
  <error/vctrs_error_subscript_oob>
  Error in `select()`:
  ! Can't select columns past the end.
  i Location 2 doesn't exist.
  i There is only 1 column.
Code
  (expect_error(select(df1, 1)))
Output
  <error/rlang_error>
  Error in `select()`:
  ! Can't reconstruct data frame.
  x The `[` method for class <dplyr_test_broken_operator/tbl_df/tbl/data.frame> must return a data frame.
  i It returned a <list>.
Code
  (expect_error(select(df2, 1)))
Output
  <error/rlang_error>
  Error in `select()`:
  ! Can't reconstruct data frame.
  x The `[` method for class <dplyr_test_operator_wrong_size/tbl_df/tbl/data.frame> must return a data frame with 1 column.
  i It returned a <data.frame> of 0 columns.

hadley/dplyr documentation built on Nov. 6, 2024, 4:48 p.m.