[TEST] TSFE can not be initialized for pages with fe_group="-2"

The TSFE can not be initialized in record-monitoring(BE editiing) context for pages, 
whichs fe_group is set to -2(show if fe_user is logged in).

This leads to following behavior:
* After editing the [sub]pages in BE, the page is removed from index and never indexed again.
* By reinitialization of pages index queue the page is indexed as expected with expected groups.

Relates: TYPO3-Solr#3351, TYPO3-Solr#3347

Tests/Integration/FrontendEnvironment/Fixtures/can_initialize_tsfe_for_page_with_different_fe_groups_settings.csv

@@ -0,0 +1,7 @@
+"pages",
+,"uid","is_siteroot","doktype","pid","fe_group"
+,"2","0","1","1","1"
+,"3","0","1","1","-2"
+"fe_groups",
+,"uid","pid","title"
+,"1","1","dummy group"

Tests/Integration/FrontendEnvironment/TsfeTest.php

@@ -6,6 +6,7 @@
 use ApacheSolrForTypo3\Solr\Tests\Integration\IntegrationTest;
 use RuntimeException;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 
 class TsfeTest extends IntegrationTest
 {
@@ -53,4 +54,37 @@ public function initializeTsfeWithNoDefaultPageAndPageErrorHandlerDoNotThrowAnEr
         $tsfeManager = GeneralUtility::makeInstance(Tsfe::class);
         $tsfeManager->getTsfeByPageIdAndLanguageId(1);
     }
+
+    /**
+     * @test
+     */
+    public function canInitializeTsfeForPageWithDifferentFeGroupsSettings()
+    {
+        $this->writeDefaultSolrTestSiteConfiguration();
+        $this->importCSVDataSet(__DIR__ . '/Fixtures/can_initialize_tsfe_for_page_with_different_fe_groups_settings.csv');
+
+        $tsfeNotRestricted = GeneralUtility::makeInstance(Tsfe::class)->getTsfeByPageIdIgnoringLanguage(1);
+        self::assertInstanceOf(
+            TypoScriptFrontendController::class,
+            $tsfeNotRestricted,
+            'The TSFE can not be initialized at all, nor for public page either for access restricted(fe_group) page. ' .
+                'Most probably nothing will work.'
+        );
+
+        $tsfeRestrictedForExistingFeGroup = GeneralUtility::makeInstance(Tsfe::class)->getTsfeByPageIdIgnoringLanguage(2);
+        self::assertInstanceOf(
+            TypoScriptFrontendController::class,
+            $tsfeRestrictedForExistingFeGroup,
+            'The TSFE can not be initialized for existing fe_group. ' .
+                'This will lead to failures on editing the access restricted [sub]pages in BE.'
+        );
+
+        $tsfeForLoggedInUserOnly = GeneralUtility::makeInstance(Tsfe::class)->getTsfeByPageIdIgnoringLanguage(3);
+        self::assertInstanceOf(
+            TypoScriptFrontendController::class,
+            $tsfeForLoggedInUserOnly,
+            'The TSFE can not be initialized for page with fe_group="-2". ' .
+                'This will lead to failures on editing the [sub]pages in BE for pages with fe_group="-2".'
+        );
+    }
 }