fix(gqlgen): Update gqlgen in go.mod (#6594)

* Add tests for querying alias and attribute on interface

* Requested changes

go.mod

@@ -7,7 +7,7 @@ go 1.12
 require (
 	contrib.go.opencensus.io/exporter/jaeger v0.1.0
 	contrib.go.opencensus.io/exporter/prometheus v0.1.0
-	github.com/99designs/gqlgen v0.12.2
+	github.com/99designs/gqlgen v0.13.1-0.20200928230741-819e751c2416
 	github.com/DataDog/datadog-go v0.0.0-20190425163447-40bafcb5f6c1 // indirect
 	github.com/DataDog/opencensus-go-exporter-datadog v0.0.0-20190503082300-0f32ad59ab08
 	github.com/DataDog/zstd v1.4.5 // indirect
@@ -58,7 +58,7 @@ require (
 	github.com/stretchr/testify v1.4.0
 	github.com/tinylib/msgp v0.0.0-20190103190839-ade0ca4ace05 // indirect
 	github.com/twpayne/go-geom v1.0.5
-	github.com/vektah/gqlparser/v2 v2.0.1
+	github.com/vektah/gqlparser/v2 v2.1.0
 	github.com/willf/bitset v0.0.0-20181014161241-71fa2377963f // indirect
 	go.etcd.io/etcd v0.0.0-20190228193606-a943ad0ee4c9
 	go.opencensus.io v0.21.0

go.sum

@@ -4,8 +4,8 @@ contrib.go.opencensus.io/exporter/jaeger v0.1.0 h1:WNc9HbA38xEQmsI40Tjd/MNU/g8by
 contrib.go.opencensus.io/exporter/jaeger v0.1.0/go.mod h1:VYianECmuFPwU37O699Vc1GOcy+y8kOsfaxHRImmjbA=
 contrib.go.opencensus.io/exporter/prometheus v0.1.0 h1:SByaIoWwNgMdPSgl5sMqM2KDE5H/ukPWBRo314xiDvg=
 contrib.go.opencensus.io/exporter/prometheus v0.1.0/go.mod h1:cGFniUXGZlKRjzOyuZJ6mgB+PgBcCIa79kEKR8YCW+A=
-github.com/99designs/gqlgen v0.12.2 h1:aOdpsiCycFtCnAv8CAI1exnKrIDHMqtMzQoXeTziY4o=
-github.com/99designs/gqlgen v0.12.2/go.mod h1:7zdGo6ry9u1YBp/qlb2uxSU5Mt2jQKLcBETQiKk+Bxo=
+github.com/99designs/gqlgen v0.13.1-0.20200928230741-819e751c2416 h1:8qbuDq7x3pPeEUmfa2wPKuN2G5Q/+znZWAJWZJXTjDA=
+github.com/99designs/gqlgen v0.13.1-0.20200928230741-819e751c2416/go.mod h1:NV130r6f4tpRWuAI+zsrSdooO/eWUv+Gyyoi3rEfXIk=
 github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9 h1:HD8gA2tkByhMAwYaFAX9w2l7vxvBQ5NMoxDrkhqhtn4=
 github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
@@ -434,10 +434,8 @@ github.com/valyala/fasthttp v1.6.0/go.mod h1:FstJa9V+Pj9vQ7OJie2qMHdwemEDaDiSdBn
 github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
 github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a/go.mod h1:v3UYOV9WzVtRmSR+PDvWpU/qWl4Wa5LApYYX4ZtKbio=
 github.com/vektah/dataloaden v0.2.1-0.20190515034641-a19b9a6e7c9e/go.mod h1:/HUdMve7rvxZma+2ZELQeNh88+003LL7Pf/CZ089j8U=
-github.com/vektah/gqlparser v1.3.1 h1:8b0IcD3qZKWJQHSzynbDlrtP3IxVydZ2DZepCGofqfU=
-github.com/vektah/gqlparser v1.3.1/go.mod h1:bkVf0FX+Stjg/MHnm8mEyubuaArhNEqfQhF+OTiAL74=
-github.com/vektah/gqlparser/v2 v2.0.1 h1:xgl5abVnsd4hkN9rk65OJID9bfcLSMuTaTcZj777q1o=
-github.com/vektah/gqlparser/v2 v2.0.1/go.mod h1:SyUiHgLATUR8BiYURfTirrTcGpcE+4XkV2se04Px1Ms=
+github.com/vektah/gqlparser/v2 v2.1.0 h1:uiKJ+T5HMGGQM2kRKQ8Pxw8+Zq9qhhZhz/lieYvCMns=
+github.com/vektah/gqlparser/v2 v2.1.0/go.mod h1:SyUiHgLATUR8BiYURfTirrTcGpcE+4XkV2se04Px1Ms=
 github.com/willf/bitset v0.0.0-20181014161241-71fa2377963f h1:gpNz6yJT2E7nm4WlhFendQ32tHE3uGE6P6lARnQgBnQ=
 github.com/willf/bitset v0.0.0-20181014161241-71fa2377963f/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=

graphql/e2e/common/fragment.go

@@ -182,6 +182,12 @@ func fragmentInQueryOnInterface(t *testing.T) {
 					name
 				}
 			}
+			qc2: queryCharacter {
+				... on Human {
+					name
+					n: name
+				}
+			}
 			queryThing {
 				__typename
 				... on ThingOne {
@@ -310,6 +316,14 @@ func fragmentInQueryOnInterface(t *testing.T) {
                 "primaryFunction": "Robot"
             }
 		],
+		"qc2":[
+			{
+				"name": "Han",
+				"n": "Han"
+			},
+			{
+			}
+		],
 		"queryThing":[
 			{
 				"__typename": "ThingOne",

graphql/schema/schemagen_test.go

@@ -21,6 +21,8 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/google/go-cmp/cmp/cmpopts"
+
 	dschema "github.com/dgraph-io/dgraph/schema"
 	"github.com/dgraph-io/dgraph/x"
 	"github.com/google/go-cmp/cmp"
@@ -126,7 +128,7 @@ func TestSchemas(t *testing.T) {
 		for _, sch := range tests["invalid_schemas"] {
 			t.Run(sch.Name, func(t *testing.T) {
 				_, errlist := NewHandler(sch.Input, false)
-				if diff := cmp.Diff(sch.Errlist, errlist); diff != "" {
+				if diff := cmp.Diff(sch.Errlist, errlist, cmpopts.IgnoreUnexported(gqlerror.Error{})); diff != "" {
 					t.Errorf("error mismatch (-want +got):\n%s", diff)
 				}
 			})