Test for #487

codegen/testserver/input_test.go

@@ -0,0 +1,34 @@
+package testserver
+
+import (
+	"context"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/99designs/gqlgen/client"
+	"github.com/99designs/gqlgen/handler"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(t *testing.T) {
+	resolvers := &Stub{}
+
+	srv := httptest.NewServer(handler.GraphQL(NewExecutableSchema(Config{Resolvers: resolvers})))
+
+	c := client.New(srv.URL)
+
+	t.Run("when function errors on directives", func(t *testing.T) {
+		resolvers.QueryResolver.InputSlice = func(ctx context.Context, arg []string) (b bool, e error) {
+			return true, nil
+		}
+
+		var resp struct {
+			DirectiveArg *string
+		}
+
+		err := c.Post(`query { inputSlice(arg: ["ok", 1, 2, "ok"]) }`, &resp)
+
+		require.EqualError(t, err, `http 422: {"errors":[{"message":"Expected type String!, found 1.","locations":[{"line":1,"column":32}]},{"message":"Expected type String!, found 2.","locations":[{"line":1,"column":35}]}],"data":null}`)
+		require.Nil(t, resp.DirectiveArg)
+	})
+}

codegen/testserver/resolver.go

@@ -92,6 +92,9 @@ func (r *queryResolver) DirectiveInputNullable(ctx context.Context, arg *InputDi
 func (r *queryResolver) DirectiveInput(ctx context.Context, arg InputDirectives) (*string, error) {
 	panic("not implemented")
 }
+func (r *queryResolver) InputSlice(ctx context.Context, arg []string) (bool, error) {
+	panic("not implemented")
+}
 func (r *queryResolver) KeywordArgs(ctx context.Context, breakArg string, defaultArg string, funcArg string, interfaceArg string, selectArg string, caseArg string, deferArg string, goArg string, mapArg string, structArg string, chanArg string, elseArg string, gotoArg string, packageArg string, switchArg string, constArg string, fallthroughArg string, ifArg string, rangeArg string, typeArg string, continueArg string, forArg string, importArg string, returnArg string, varArg string) (bool, error) {
 	panic("not implemented")
 }

codegen/testserver/schema.graphql

@@ -16,6 +16,7 @@ type Query {
     directiveNullableArg(arg: Int @range(min:0), arg2: Int @range): String
     directiveInputNullable(arg: InputDirectives): String
     directiveInput(arg: InputDirectives!): String
+    inputSlice(arg: [String!]!): Boolean!
 }
 
 type Subscription {