1 files changed, 30 insertions, 0 deletions
diff --git a/www/wiki/tests/phpunit/includes/api/PrefixUniquenessTest.php b/www/wiki/tests/phpunit/includes/api/PrefixUniquenessTest.php
new file mode 100644
index 00000000..d125a7d5
--- /dev/null
+++ b/www/wiki/tests/phpunit/includes/api/PrefixUniquenessTest.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * Checks that all API query modules, core and extensions, have unique prefixes.
+ *
+ * @group API
+ */
+class PrefixUniquenessTest extends MediaWikiTestCase {
+
+	public function testPrefixes() {
+		$main = new ApiMain( new FauxRequest() );
+		$query = new ApiQuery( $main, 'foo', 'bar' );
+		$moduleManager = $query->getModuleManager();
+
+		$modules = $moduleManager->getNames();
+		$prefixes = [];
+
+		foreach ( $modules as $name ) {
+			$module = $moduleManager->getModule( $name );
+			$class = get_class( $module );
+
+			$prefix = $module->getModulePrefix();
+			if ( $prefix !== '' && isset( $prefixes[$prefix] ) ) {
+				$this->fail( "Module prefix '{$prefix}' is shared between {$class} and {$prefixes[$prefix]}" );
+			}
+			$prefixes[$module->getModulePrefix()] = $class;
+		}
+		$this->assertTrue( true ); // dummy call to make this test non-incomplete
+	}
+}