add options for strict testing (#1102)

- part of
insightsengineering/coredev-tasks#478
- please read this for more info about the implementation:
insightsengineering/coredev-tasks#478 (comment)
- fixes discovered partial argument matches

---------

Co-authored-by: 27856297+dependabot-preview[bot]@users.noreply.github.com <27856297+dependabot-preview[bot]@users.noreply.github.com>

R/validate_inputs.R

@@ -58,12 +58,16 @@
 #'   # set up input validation
 #'   iv <- InputValidator$new()
 #'   iv$add_rule("letter", sv_in_set(LETTERS, "choose a capital letter"))
-#'   iv$add_rule("number", ~ if (as.integer(.) %% 2L == 1L) "choose an even number")
+#'   iv$add_rule("number", function(x) {
+#'     if (as.integer(x) %% 2L == 1L) "choose an even number"
+#'   })
 #'   iv$enable()
 #'   # more input validation
 #'   iv_par <- InputValidator$new()
 #'   iv_par$add_rule("color", sv_required(message = "choose a color"))
-#'   iv_par$add_rule("color", ~ if (length(.) > 1L) "choose only one color")
+#'   iv_par$add_rule("color", function(x) {
+#'     if (length(x) > 1L) "choose only one color"
+#'   })
 #'   iv_par$add_rule(
 #'     "size",
 #'     sv_between(
@@ -87,7 +91,7 @@
 #'       ))
 #'     )
 #'
-#'     plot(eruptions ~ waiting, faithful,
+#'     plot(faithful$eruptions ~ faithful$waiting,
 #'       las = 1, pch = 16,
 #'       col = input[["color"]], cex = input[["size"]]
 #'     )

tests/testthat/setup-options.R

@@ -0,0 +1,20 @@
+# `opts_partial_match_old` is left for exclusions due to partial matching in dependent packages (i.e. not fixable here)
+# it might happen that it is not used right now, but it is left for possible future use
+# use with: `withr::with_options(opts_partial_match_old, { ... })` inside the test
+opts_partial_match_old <- list(
+  warnPartialMatchDollar = getOption("warnPartialMatchDollar"),
+  warnPartialMatchArgs = getOption("warnPartialMatchArgs"),
+  warnPartialMatchAttr = getOption("warnPartialMatchAttr")
+)
+opts_partial_match_new <- list(
+  warnPartialMatchDollar = TRUE,
+  warnPartialMatchArgs = TRUE,
+  warnPartialMatchAttr = TRUE
+)
+
+if (isFALSE(getFromNamespace("on_cran", "testthat")()) && requireNamespace("withr", quietly = TRUE)) {
+  withr::local_options(
+    opts_partial_match_new,
+    .local_envir = testthat::teardown_env()
+  )
+}