update tests (#220)

closes #219 

--------------------------------------------------------------------------------

Pre-review Checklist (if item does not apply, mark is as complete)
- [x] **All** GitHub Action workflows pass with a ✅
- [x] PR branch has pulled the most recent updates from master branch:
`usethis::pr_merge_main()`
- [x] If a bug was fixed, a unit test was added.
- [ ] If a new `ard_*()` function was added, it passes the ARD
structural checks from `cards::check_ard_structure()`.
- [ ] If a new `ard_*()` function was added, `set_cli_abort_call()` has
been set.
- [ ] If a new `ard_*()` function was added and it depends on another
package (such as, `broom`), `is_pkg_installed("broom", reference_pkg =
"cardx")` has been set in the function call and the following added to
the roxygen comments: `@examplesIf
do.call(asNamespace("cardx")$is_pkg_installed, list(pkg = "broom"",
reference_pkg = "cardx"))`
- [ ] Code coverage is suitable for any new functions/features
(generally, 100% coverage for new code): `devtools::test_coverage()`

Reviewer Checklist (if item does not apply, mark is as complete)

- [ ] If a bug was fixed, a unit test was added.
- [ ] Code coverage is suitable for any new functions/features:
`devtools::test_coverage()`

When the branch is ready to be merged:
- [ ] Update `NEWS.md` with the changes from this pull request under the
heading "`# cardx (development version)`". If there is an issue
associated with the pull request, reference it in parentheses at the end
update (see `NEWS.md` for examples).
- [ ] **All** GitHub Action workflows pass with a ✅
- [ ] Approve Pull Request
- [ ] Merge the PR. Please use "Squash and merge" or "Rebase and merge".

tests/testthat/_snaps/ard_regression.md

@@ -68,15 +68,3 @@
       7      cyl.sd__(Intercept)      cyl.sd__(Intercept)  estimate  4.023    NULL  NULL
       8 Residual.sd__Observation Residual.sd__Observation  estimate  3.149    NULL  NULL
 
-# ard_regression() warnings and errors return correctly
-
-    Code
-      as.data.frame(ard_regression(mod))
-    Output
-        variable    context stat_name  stat_label stat fmt_fn
-      1  model_1 regression  estimate Coefficient NULL   NULL
-                                                                                                           warning
-      1 Could not access test statistic of model parameters., Could not access test statistic of model parameters.
-                               error
-      1 Error: ! Unable to tidy `x`.
-

tests/testthat/test-ard_regression.R

@@ -44,14 +44,17 @@ test_that("ard_regression() does not produce `variable_level` column where not a
 })
 
 test_that("ard_regression() warnings and errors return correctly", {
+  skip_if_not(is_pkg_installed(pkg = "parameters", reference_pkg = "cardx"))
+  # constructed a model where broom.helpers fails,
+  # fall back method uses parameters which returns different messaging.
   mod <- lm(AGE ~ ARM, data = cards::ADSL)
   mod$coefficients <- NULL
+  df <- mod |>
+    ard_regression() |>
+    as.data.frame()
 
-  expect_snapshot(
-    mod |>
-      ard_regression() |>
-      as.data.frame()
-  )
+  expect_false(is_empty(df$error))
+  expect_true(is_empty(df$stat[[1]]))
 })
 
 test_that("ard_regression() follows ard structure", {