test: meson: disable test with disabled module dependencies

Some tests will require some modules to be present to run correctly, but
it cannot be probed at compile time. However, as soon as every modules
will be declared unconditionnally, we'll be able to depend on a disabled
module and disable the matching tests.

Ideally, we'd skip it so that the test is still reported, but there's no
code to do that yet.

modules/meson.build

@@ -258,6 +258,7 @@ endif
 # entry with the needed build definition for a VLC plugin.
 #
 vlc_plugins_targets = {}
+vlc_plugins_manifest = {}
 foreach module : vlc_modules
     if not module.has_key('name')
         error('Got invalid vlc_modules entry without \'name\' key')
@@ -324,4 +325,7 @@ foreach module : vlc_modules
     vlc_plugins_targets += {
         module['name']: vlc_plugin
     }
+    vlc_plugins_manifest += {
+        module['name']: module
+    }
 endforeach

test/meson.build

@@ -37,6 +37,7 @@ foreach vlc_test: vlc_tests
         '-DTOP_SRCDIR="@0@"'.format(vlc_src_root),
     ]
 
+    disabled_dependencies = []
     test_modules_deps = []
     foreach module_name : vlc_test.get('module_depends', [])
         if module_name not in vlc_plugins_targets.keys()
@@ -44,8 +45,16 @@ foreach vlc_test: vlc_tests
                   .format(vlc_test['name'], module_name))
         endif
         test_modules_deps += vlc_plugins_targets[module_name]
+        if vlc_plugins_manifest[module_name].get('enabled', true)
+            disabled_dependencies += module_name
+        endif
     endforeach
 
+    if disabled_dependencies != []
+        # TODO: mark as skipped
+        continue
+    endif
+
     moc_sources = []
     if vlc_test.has_key('moc_headers') and qt5_dep.found()
         moc_sources += qt5.preprocess(moc_headers: vlc_test['moc_headers'],