Added API-functional tests

Author: ronak2ram

dev/tests/integration/testsuite/Magento/Framework/GraphQl/_files/schemaA.graphqls

@@ -9,6 +9,7 @@ type Mutation {
 input FilterTypeInput @doc(description:"Comment for FilterTypeInput") {
     eq: String @doc(description:"Equal")
     finset: [String]
+    nfinset: [String]
     from: String
     gt: String
     gteq: String

dev/tests/integration/testsuite/Magento/Framework/GraphQl/_files/schemaC.graphqls

@@ -20,6 +20,7 @@ type Attribute @doc(description: "Attribute contains the attribute_type of the s
 input FilterTypeInput @doc(description:"Comment for FilterTypeInput") {
     eq: String @doc(description:"Equal")
     finset: [String]
+    nfinset: [String]
     from: String
     gt: String
     gteq: String

dev/tests/integration/testsuite/Magento/Framework/GraphQl/_files/schema_response_sdl_description.php

@@ -519,6 +519,20 @@
                 ],
                 'defaultValue' =>  null
             ],
+            [
+                'name' =>  'nfinset',
+                'description' =>  '',
+                'type' =>  [
+                    'kind' =>  'LIST',
+                    'name' =>  null,
+                    'ofType' =>  [
+                        'kind' =>  'SCALAR',
+                        'name' =>  'String',
+                        'ofType' =>  null
+                    ]
+                ],
+                'defaultValue' =>  null
+            ],
             [
                 'name' =>  'from',
                 'description' =>  '',

dev/tests/integration/testsuite/Magento/Framework/GraphQl/_files/schema_with_description_sdl.php

@@ -519,6 +519,20 @@
                 ],
                 'defaultValue' =>  null
             ],
+            [
+                'name' =>  'nfinset',
+                'description' =>  '',
+                'type' =>  [
+                    'kind' =>  'LIST',
+                    'name' =>  null,
+                    'ofType' =>  [
+                        'kind' =>  'SCALAR',
+                        'name' =>  'String',
+                        'ofType' =>  null
+                    ]
+                ],
+                'defaultValue' =>  null
+            ],
             [
                 'name' =>  'from',
                 'description' =>  '',