specify_df.md
In stbl: Stabilize Function Arguments

specify_df() errors when required column is missing (#142)

Code
  (expect_pkg_error_classes(validator(data.frame(name = "Alice")), "stbl",
  "missing_element"))
Output
  <error/stbl-error-missing_element>
  Error:
  ! `data.frame(name = "Alice")` must contain element "age".

specify_df() passes through .min_rows, .max_rows (#142)

Code
  (expect_pkg_error_classes(validator(data.frame(a = 1L)), "stbl", "too_few_rows")
  )
Output
  <error/stbl-error-too_few_rows>
  Error:
  ! `data.frame(a = 1L)` must have at least 2 rows.
  x 1 is too few.

specify_df() passes through .col_names (#142)

Code
  (expect_pkg_error_classes(validator(data.frame(a = 1L)), "stbl", "missing_cols")
  )
Output
  <error/stbl-error-missing_cols>
  Error:
  ! `data.frame(a = 1L)` must contain column "b".