resourceloader: Apply safemode to startup module registry

This effectively applies safemode to the mw.loader client,
without the client itself needing specific knowledge of safemode.

Test Plan:
* Unchanged: When viewing a page in safemode, the 'user' and
  'site' modules are still not queued by OutputPage.
* New: mw.loader.getState('site'), previously would yield
  'registered', but will now yield null.
* New: mw.loader.load('site'), previously loaded the module,
  it now logs a dependency warning for unknown module, like for
  any other unknown module.
* New: mw.loader.using('site'), previously resolved, it is now
  rejected.

Bug: T185303
Change-Id: I672e3891c8e1b3c2d13655fa134d0f1d031b8247

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/phpunit/includes/resourceloader/ResourceLoaderClientHtmlTest.php b/tests/phpunit/includes/resourceloader/ResourceLoaderClientHtmlTest.php
index 5b5c484b4232..9b03c5ccdd67 100644
--- a/tests/phpunit/includes/resourceloader/ResourceLoaderClientHtmlTest.php
+++ b/tests/phpunit/includes/resourceloader/ResourceLoaderClientHtmlTest.php
@@ -259,6 +259,25 @@ Deprecation message.' ]
 	}
 
 	/**
+	 * Confirm that 'safemode' is passed down to startup.
+	 *
+	 * @covers ResourceLoaderClientHtml::getHeadHtml
+	 */
+	public function testGetHeadHtmlWithSafemode() {
+		$client = new ResourceLoaderClientHtml(
+			self::makeContext(),
+			[ 'safemode' => '1' ]
+		);
+
+		// phpcs:disable Generic.Files.LineLength
+		$expected = '<script>document.documentElement.className = document.documentElement.className.replace( /(^|\s)client-nojs(\s|$)/, "$1client-js$2" );</script>' . "\n"
+			. '<script async="" src="/w/load.php?debug=false&amp;lang=nl&amp;modules=startup&amp;only=scripts&amp;safemode=1&amp;skin=fallback"></script>';
+		// phpcs:enable
+
+		$this->assertEquals( $expected, $client->getHeadHtml() );
+	}
+
+	/**
 	 * Confirm that a null 'target' is the same as no target.
 	 *
 	 * @covers ResourceLoaderClientHtml::getHeadHtml