Make accept_snapshot() work on filenames containing a dot (#1669)

This changes slightly the logic for matching file names:

- before if a file name was considered to be without extension, we would
add the `.md` and then compare it with the actual file names in the
`_snaps` directory. However, that would fail if the file contained dots,
as they would be considered to be a file extension: for them no `.md` was
added to their name, and therefore they would never match with the actual
files in the `_snaps` directory, so no update could ever succeed

- with this patch, we strip any `.md` or `.txt` extension from the file
names received by `snapshot_manage()`, and compare those with the actual
file names from the `_snaps` directory also without extension

Author: mcol

NEWS.md

@@ -3,6 +3,9 @@
 * Fixed an issue where calling `skip()` outside of an active test could
   cause an unexpected error (@kevinushey, #2039).
 
+* `snapshot_accept()` now works also when the tested file contains dots in
+  the filename (@mcol #1669).
+
 # testthat 3.2.2
 
 ## New expectations

R/snapshot-manage.R

@@ -161,9 +161,11 @@ snapshot_meta <- function(files = NULL, path = "tests/testthat") {
     files <- files[!is_dir]
 
     dirs <- substr(dirs, 1, nchar(dirs) - 1)
-    files <- ifelse(tools::file_ext(files) == "", paste0(files, ".md"), files)
+    files <- gsub("\\.md|\\.txt$", "", files)
 
-    out <- out[out$name %in% files | out$test %in% dirs, , drop = FALSE]
+    out_name_sans_ext <- tools::file_path_sans_ext(out$name)
+    out <- out[out_name_sans_ext %in% files |
+               out$test %in% dirs, , drop = FALSE]
   }
 
   out

tests/testthat/_snaps/snapshot-manage.md

@@ -38,6 +38,22 @@
       Updating snapshots:
       * test/a.txt
 
+---
+
+    Code
+      snapshot_accept("test/c.d.md", path = path)
+    Message
+      Updating snapshots:
+      * test/c.d.md
+
+---
+
+    Code
+      snapshot_accept("test/c.d", path = path)
+    Message
+      Updating snapshots:
+      * test/c.d.md
+
 # can work with variants
 
     Code

tests/testthat/test-snapshot-manage.R

@@ -21,6 +21,15 @@ test_that("can accept specific files", {
   expect_snapshot(snapshot_accept("test/", path = path))
   expect_equal(dir(file.path(path, "_snaps"), recursive = TRUE), "test/a.txt")
 
+  ## file names with dots
+  path <- local_snapshot_dir(c("test/c.d.md", "test/c.d.new.md"))
+  expect_snapshot(snapshot_accept("test/c.d.md", path = path))
+  expect_equal(dir(file.path(path, "_snaps"), recursive = TRUE), "test/c.d.md")
+
+  path <- local_snapshot_dir(c("test/c.d.md", "test/c.d.new.md"))
+  expect_snapshot(snapshot_accept("test/c.d", path = path))
+  expect_equal(dir(file.path(path, "_snaps"), recursive = TRUE), "test/c.d.md")
+
 })
 
 test_that("can work with variants", {