Revert GraphQL-727: currentPage: 0, currentPage: 1 and currentPage: -1 produces the same output for products query when filtering is used

Author: lenaorobei

app/code/Magento/CatalogGraphQl/Model/Resolver/Category/Products.php

@@ -66,13 +66,6 @@ public function resolve(
             ]
         ];
         $searchCriteria = $this->searchCriteriaBuilder->build($field->getName(), $args);
-        if ($args['currentPage'] < 1) {
-            throw new GraphQlInputException(__('currentPage value must be greater than 0.'));
-        }
-        if ($args['pageSize'] < 1) {
-            throw new GraphQlInputException(__('pageSize value must be greater than 0.'));
-        }
-
         $searchCriteria->setCurrentPage($args['currentPage']);
         $searchCriteria->setPageSize($args['pageSize']);
         $searchResult = $this->filterQuery->getResult($searchCriteria, $info);

app/code/Magento/CatalogGraphQl/Model/Resolver/Products.php

@@ -71,13 +71,6 @@ public function resolve(
         array $args = null
     ) {
         $searchCriteria = $this->searchCriteriaBuilder->build($field->getName(), $args);
-        if ($args['currentPage'] < 1) {
-            throw new GraphQlInputException(__('currentPage value must be greater than 0.'));
-        }
-        if ($args['pageSize'] < 1) {
-            throw new GraphQlInputException(__('pageSize value must be greater than 0.'));
-        }
-
         $searchCriteria->setCurrentPage($args['currentPage']);
         $searchCriteria->setPageSize($args['pageSize']);
         if (!isset($args['search']) && !isset($args['filter'])) {

dev/tests/api-functional/testsuite/Magento/GraphQl/Catalog/ProductSearchTest.php

@@ -381,10 +381,8 @@ public function testSearchWithFilterWithPageSizeEqualTotalCount()
 }
 QUERY;
         $this->expectException(\Exception::class);
-        $this->expectExceptionMessage(
-            'GraphQL response contains errors: currentPage value 2 specified is greater ' .
-            'than the 1 page(s) available'
-        );
+        $this->expectExceptionMessage('GraphQL response contains errors: currentPage value 2 specified is greater ' .
+            'than the 1 page(s) available');
         $this->graphQlQuery($query);
     }
 
@@ -1045,10 +1043,8 @@ public function testQueryPageOutOfBoundException()
 QUERY;
 
         $this->expectException(\Exception::class);
-        $this->expectExceptionMessage(
-            'GraphQL response contains errors: currentPage value 2 specified is greater ' .
-            'than the 1 page(s) available.'
-        );
+        $this->expectExceptionMessage('GraphQL response contains errors: currentPage value 2 specified is greater ' .
+            'than the 1 page(s) available.');
         $this->graphQlQuery($query);
     }
 
@@ -1079,10 +1075,8 @@ public function testQueryWithNoSearchOrFilterArgumentException()
 QUERY;
 
         $this->expectException(\Exception::class);
-        $this->expectExceptionMessage(
-            'GraphQL response contains errors: \'search\' or \'filter\' input argument is ' .
-            'required.'
-        );
+        $this->expectExceptionMessage('GraphQL response contains errors: \'search\' or \'filter\' input argument is ' .
+            'required.');
         $this->graphQlQuery($query);
     }
 
@@ -1137,66 +1131,6 @@ public function testFilterProductsThatAreOutOfStockWithConfigSettings()
         $this->assertEquals(1, $response['products']['total_count']);
     }
 
-    /**
-     * Verify that invalid page numbers return an error
-     *
-     * @magentoApiDataFixture Magento/Catalog/_files/products_with_layered_navigation_attribute.php
-     * @expectedException \Exception
-     * @expectedExceptionMessage currentPage value must be greater than 0
-     */
-    public function testInvalidPageNumbers()
-    {
-        $query = <<<QUERY
-{
-  products (
-    filter: {
-      sku: {
-        like:"simple%"
-      }
-    }
-    pageSize: 4
-    currentPage: 0
-  ) {
-    items {
-      sku
-    }
-  }
-}
-QUERY;
-
-        $this->graphQlQuery($query);
-    }
-
-    /**
-     * Verify that invalid page size returns an error
-     *
-     * @magentoApiDataFixture Magento/Catalog/_files/products_with_layered_navigation_attribute.php
-     * @expectedException \Exception
-     * @expectedExceptionMessage pageSize value must be greater than 0
-     */
-    public function testInvalidPageSize()
-    {
-        $query = <<<QUERY
-{
-  products (
-    filter: {
-      sku: {
-        like:"simple%"
-      }
-    }
-    pageSize: 0
-    currentPage: 1
-  ) {
-    items {
-      sku
-    }
-  }
-}
-QUERY;
-
-        $this->graphQlQuery($query);
-    }
-
     /**
      * Asserts the different fields of items returned after search query is executed
      *