45591 (Cf. 45587, 45620): In the test suite, centralize testing that compiled modules can be loaded successfully.

Have V01zmodload.ztst check that all modules enabled in config.modules
load successfully.  With this change, the test files for individual
modules may assume that if 'zmodload' fails that must be because the
module hadn't been compiled in, and mark themselves as skipped in that
case.

ChangeLog

@@ -1,3 +1,9 @@
+2020-03-26  Daniel Shahaf  <d.s@daniel.shahaf.name>
+
+	* 45591 (Cf. 45587, 45620): Test/V01zmodload.ztst,
+	Test/V07pcre.ztst: In the test suite, centralize testing that
+	compiled modules can be loaded successfully.
+
 2020-03-26  Peter Stephenson  <p.w.stephenson@ntlworld.com>
 
 	* 45616: Src/loop.c, Test/A01grammar.ztst: Remove tokens

Test/V01zmodload.ztst

@@ -64,7 +64,7 @@
 
  for m in $mods
  do
-   zmodload $m || mods[(r)$m]=()
+   zmodload $m || return $?
  done
 0d:Test loading of all compiled modules
 

Test/V07pcre.ztst

@@ -1,11 +1,10 @@
 %prep
 
-  if grep '^name=zsh/pcre .* link=no ' $ZTST_testdir/../config.modules >/dev/null
+  if ! zmodload zsh/pcre 2>/dev/null; then
   then
     ZTST_unimplemented="the zsh/pcre module was disabled by configure (see config.modules)"
     return 0
   fi
-  zmodload zsh/pcre
   setopt rematch_pcre
 # Find a UTF-8 locale.
   setopt multibyte