R Under development (unstable) (2026-03-05 r89541) -- "Unsuffered Consequences"
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> ## To be compared against saved reference output
> if (isNamespaceLoaded("tools")) unloadNamespace("tools")
> Sys.setenv("R_HELP_BIBSTYLE" = "JSS") # fix \bibshow style
> library(tools)
> Rd2txt_options(underline_titles = FALSE)
> 
> ## Test processing and conversion of bibtools.Rd
> Rd2txt("bibtools.Rd", stages = "build") |>
+     assertWarning(verbose = TRUE)
Bibliographic Citations and References

Description:

     Meyer (1953, p. 1)

References:

     Lamport L (1994). _LaTeX: A Document Preparation System_.
     Addison-Wesley, Reading, MA. ISBN 0201529831.

     Meyer HA (1953). _Forest Mensuration_. Penns Valley Publishers.

See Also:

     Hornik and Murdoch (2011, which is cited only here so not shown
     above)

Asserted warning: bibtools.Rd:5: Could not find bibentries for the following keys:
  'non-existent-key'
> 
> ## Also test for changes in HTML conversion
> Rd2HTML("bibtools.Rd", out <- "bibtools.html",
+         stages = "build", standalone = FALSE) |>
+     assertWarning() # the same
> ## FIXME: carry-over of unshown citation (cache not cleared)
> if (!Rdiff(out, "bibtools.html.save")) unlink(out)
> 
> ## Check cited but not shown
> pkgdir <- package.skeleton("bibtools", list = ".NotYetImplemented",
+                            path = tempdir()) |> suppressMessages()
> file.copy("bibtools.Rd", file.path(pkgdir, "man")) |> stopifnot()
> tools:::.check_Rd_bibentries_cited_not_shown(dir = pkgdir)
$bibtools.Rd
[1] "R:Hornik+Murdoch:2011"

attr(,"unexpected_macro_expansion")
[1] TRUE
> ## ("unexpected_macro_expansion" as there is no build/partial.rdb)
> 
> proc.time()
   user  system elapsed 
  0.194   0.022   0.211