test(prog): drop ignore-errors on prog-module require, add featurep check

Two small tightening passes on the formatter wiring tests just shipped.

Drops `(ignore-errors ...)` from each test file's
`(require 'prog-PKG)' call. Soft use-package warnings (e.g. lsp-pyright
not being installed) still emit messages without aborting the load. A
hard load failure (syntax error, missing required dep) would now
surface as a test error rather than being silently swallowed.

Adds a `(should (featurep PKG))' assertion per language so the test
output makes "package loaded" visible alongside the fboundp and
binding checks. For webdev the assertion is `(featurep 'prog-webdev)'
since the formatter command is defined directly in prog-webdev.el
(it shells out to the prettier CLI, no separate package to load).

17 tests total now (up from 13), all passing.

1 files changed, 8 insertions, 1 deletions

diff --git a/tests/test-prog-shell--format-wiring.el b/tests/test-prog-shell--format-wiring.el
index 4a014943..604a1f26 100644
--- a/tests/test-prog-shell--format-wiring.el
+++ b/tests/test-prog-shell--format-wiring.el
@@ -25,10 +25,17 @@
 ;; the map into existence by referencing the mode definition.  When
 ;; tree-sitter isn't built in, bash-ts-mode is still defined as a
 ;; symbol via define-derived-mode, and its keymap exists.
-(ignore-errors (require 'prog-shell))
+(require 'prog-shell)
 (when (executable-find "shfmt")
   (require 'shfmt))
 
+(ert-deftest test-prog-shell-format-package-loaded ()
+  "Normal: `shfmt' is in `features' when the executable is on PATH.
+Skipped when shfmt isn't installed because the use-package gates on
+`:if (executable-find shfmt-path)' and never loads the package."
+  (format-test--skip-unless-executable "shfmt")
+  (should (featurep 'shfmt)))
+
 (ert-deftest test-prog-shell-format-command-fboundp ()
   "Normal: `shfmt-buffer' is fboundp after shfmt loads.
 Skipped when shfmt isn't installed because the use-package gates on