Any idea why autopkgtest of r-cran-repr fails (seems broken string comparison issue)

[Andreas Tille <andreas@an3as.eu>]

Hi,

I updated r-cran-repr and assumed I would have fixed the autopkgtest by
using UTF-8[1].  Now the test output is:


── Failure (test_repr_array_df.r:18:2): factors display correctly ──────────────
repr_html(df) (`actual`) not identical to "<table class=\"dataframe\">\n<caption>A data.frame: 1 × 1</caption>\n<thead>\n\t<tr><th scope=col>a</th></tr>\n\t<tr><th scope=col>&lt;fct&gt;</th></tr>\n</thead>\n<tbody>\n\t<tr><td>iamafactor</td></tr>\n</tbody>\n</table>\n" (`expected`).

lines(actual[[1]])[1:5] vs lines(expected[[1]])[1:5]
  "<table class=\"dataframe\">"
- "<caption>A data.frame: 1 x 1</caption>"
+ "<caption>A data.frame: 1 × 1</caption>"
  "<thead>"
  "\t<tr><th scope=col>a</th></tr>"
  "\t<tr><th scope=col>&lt;fct&gt;</th></tr>"
── Failure (test_repr_array_df.r:35:2): mixed factors and strings display correctly ──
repr_html(df) (`actual`) not identical to "<table class=\"dataframe\">\n<caption>A data.frame: 1 × 2</caption>\n<thead>\n\t<tr><th scope=col>a</th><th scope=col>b</th></tr>\n\t<tr><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;fct&gt;</th></tr>\n</thead>\n<tbody>\n\t<tr><td>iamastring</td><td>iamafactor</td></tr>\n</tbody>\n</table>\n" (`expected`).

lines(actual[[1]])[1:5] vs lines(expected[[1]])[1:5]
  "<table class=\"dataframe\">"
- "<caption>A data.frame: 1 x 2</caption>"
+ "<caption>A data.frame: 1 × 2</caption>"
  "<thead>"
  "\t<tr><th scope=col>a</th><th scope=col>b</th></tr>"
  "\t<tr><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;fct&gt;</th></tr>"
── Failure (test_repr_array_df.r:51:2): date display correctly ─────────────────
repr_html(df) (`actual`) not identical to "<table class=\"dataframe\">\n<caption>A data.frame: 1 × 1</caption>\n<thead>\n\t<tr><th scope=col>a</th></tr>\n\t<tr><th scope=col>&lt;dttm&gt;</th></tr>\n</thead>\n<tbody>\n\t<tr><td>2016-05-28 10:00:00</td></tr>\n</tbody>\n</table>\n" (`expected`).

lines(actual[[1]])[1:5] vs lines(expected[[1]])[1:5]
  "<table class=\"dataframe\">"
- "<caption>A data.frame: 1 x 1</caption>"
+ "<caption>A data.frame: 1 × 1</caption>"
  "<thead>"
  "\t<tr><th scope=col>a</th></tr>"
  "\t<tr><th scope=col>&lt;dttm&gt;</th></tr>"
── Failure (test_repr_array_df.r:67:2): markdown works ─────────────────────────
repr_markdown(df) (`actual`) not identical to "\nA data.frame: 2 × 2\n\n| a &lt;int&gt; | b &lt;chr&gt; |\n|---|---|\n| 1 | a |\n| 2 | b |\n\n" (`expected`).


I wonder whether this might be some issue of different line ending
encodings or whatever, which makes the obviously equal strings different
in this test.  Any idea how to fix this?

Kind regards

      Andreas.


[1] https://salsa.debian.org/r-pkg-team/r-cran-repr/-/commit/ef7475a798d72b388e6bb092de06ff49f58e1504

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