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, 5 insertions, 1 deletions

diff --git a/tests/test-prog-python--format-wiring.el b/tests/test-prog-python--format-wiring.el
index 67c18dd11..b017b26bd 100644
--- a/tests/test-prog-python--format-wiring.el
+++ b/tests/test-prog-python--format-wiring.el
@@ -18,10 +18,14 @@
 ;; use-package's `:bind (:map ...)' defers until the named map exists.
 ;; Loading python.el populates `python-ts-mode-map'; loading blacken
 ;; resolves the binding form's late-binding hook.
-(ignore-errors (require 'prog-python))
+(require 'prog-python)
 (require 'python)
 (require 'blacken)
 
+(ert-deftest test-prog-python-format-package-loaded ()
+  "Normal: `blacken' is in `features' after the prog-python config loads."
+  (should (featurep 'blacken)))
+
 (ert-deftest test-prog-python-format-command-fboundp ()
   "Normal: `blacken-buffer' is fboundp after the package is loaded."
   (should (fboundp 'blacken-buffer)))