createMock( OutputPage::class ); $mockOut->expects( $this->once() ) ->method( 'setStatusCode' ) ->with( 429 ); $this->setMwGlobals( 'wgOut', $mockOut ); try { throw new ThrottledError(); } catch ( ThrottledError $e ) { ob_start(); $e->report(); $text = ob_get_clean(); $this->assertStringContainsString( $e->getMessage(), $text ); } } }