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.

4 files changed, 27 insertions, 4 deletions

diff --git a/tests/test-prog-go--format-wiring.el b/tests/test-prog-go--format-wiring.el
index 99d80772..609aea34 100644
--- a/tests/test-prog-go--format-wiring.el
+++ b/tests/test-prog-go--format-wiring.el
@@ -20,9 +20,13 @@
 (require 'testutil-format-wiring)
 
 (format-test--ensure-packages-init)
-(ignore-errors (require 'prog-go))
+(require 'prog-go)
 (require 'go-mode)
 
+(ert-deftest test-prog-go-format-package-loaded ()
+  "Normal: `go-mode' is in `features' after the prog-go config loads."
+  (should (featurep 'go-mode)))
+
 (ert-deftest test-prog-go-format-command-fboundp ()
   "Normal: `gofmt' is fboundp after `go-mode' loads."
   (should (fboundp 'gofmt)))
diff --git a/tests/test-prog-python--format-wiring.el b/tests/test-prog-python--format-wiring.el
index 67c18dd1..b017b26b 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)))
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
diff --git a/tests/test-prog-webdev--format-wiring.el b/tests/test-prog-webdev--format-wiring.el
index 7d9914f2..43cfe945 100644
--- a/tests/test-prog-webdev--format-wiring.el
+++ b/tests/test-prog-webdev--format-wiring.el
@@ -22,7 +22,15 @@
 (require 'testutil-format-wiring)
 
 (format-test--ensure-packages-init)
-(ignore-errors (require 'prog-webdev))
+(require 'prog-webdev)
+
+(ert-deftest test-prog-webdev-format-package-loaded ()
+  "Normal: `prog-webdev' is in `features' after load.
+The webdev formatter is a custom function defined in prog-webdev
+itself, so this asserts the module loaded rather than a separate
+formatter package (there isn't one — `cj/webdev-format-buffer'
+shells out to the `prettier' CLI directly)."
+  (should (featurep 'prog-webdev)))
 
 (ert-deftest test-prog-webdev-format-command-fboundp ()
   "Normal: `cj/webdev-format-buffer' is fboundp from prog-webdev."