Mocha tests: Support language links to en-x-piglatin

Why:
- In order to test functionality related to interwiki links, we need to
  define an interwiki prefix that matches a language code, and make it
  available in all test environments.
- This way, links of the form [[en-x-piglatin:...]] will be interpreted
  as "magic" language links.

What:
- Add a hook handler for InterwikiLoadPrefix to DevelopmentSettings.php
  to provide a URL for the 'en-x-piglatin' prefix.

Bug: T382458
Change-Id: I908dca770ef0d88f70af09afbaa267aa92750ba1

1 files changed, 10 insertions, 0 deletions

diff --git a/includes/DevelopmentSettings.php b/includes/DevelopmentSettings.php
index 489886dd9ec5..20561ed31fe4 100644
--- a/includes/DevelopmentSettings.php
+++ b/includes/DevelopmentSettings.php
@@ -187,3 +187,13 @@ $wgDefaultUserOptions['visualeditor-newwikitext'] = 0;
 
 // Enable creation of temp user accounts on edit (T355880, T359043)
 $wgAutoCreateTempUser['enabled'] = true;
+
+// Make sure Mocha tests can create language links by defining an interwiki
+// prefix that matches a known language code.
+$wgHooks['InterwikiLoadPrefix'][] = static function ( $prefix, &$iwData ) {
+	if ( $prefix === 'en-x-piglatin' ) {
+		$iwData['iw_url'] = 'https://piggy.wikipedia.org/wiki/$1';
+		return false;
+	}
+	return true;
+};