MQE-896: Page schema needs to allow empty section

- PageObjectHandler now allows for empty pages.

Author: KevinBKozan

dev/tests/unit/Magento/FunctionalTestFramework/Page/Handlers/PageObjectHandlerTest.php

@@ -51,6 +51,25 @@ public function testGetPageObject()
         $this->assertNull($invalidPage);
     }
 
+    public function testGetEmptyPage()
+    {
+        $mockData = [
+            "testPage1" => [
+                "url" => "testURL1",
+                "module" => "testModule1",
+                "section" => [
+                ],
+                "area" => "test"
+            ]];
+        $this->setMockParserOutput($mockData);
+
+        // get pages
+        $page = PageObjectHandler::getInstance()->getObject('testPage1');
+
+        // Empty page has been read in and gotten without an exception being thrown.
+        $this->addToAssertionCount(1);
+    }
+
     /**
      * Function used to set mock for parser return and force init method to run between tests.
      *

src/Magento/FunctionalTestingFramework/Page/Handlers/PageObjectHandler.php

@@ -62,7 +62,7 @@ private function __construct()
             }
 
             $module = $pageData[self::MODULE];
-            $sectionNames = array_keys($pageData[self::SECTION]);
+            $sectionNames = array_keys($pageData[self::SECTION] ?? []);
             $parameterized = $pageData[self::PARAMETERIZED] ?? false;
 
             $this->pageObjects[$pageName] =