fix: fix unmarshall error in graphql call (runatlantis#2128)

* Fix unmarshall error in GraphQL call runatlantis#2090

* Add unit tests for GetTeamNamesForUser

* Fix lint error

server/events/vcs/github_client.go

@@ -29,6 +29,7 @@ import (
 	"github.com/runatlantis/atlantis/server/events/vcs/common"
 	"github.com/runatlantis/atlantis/server/logging"
 	"github.com/shurcooL/githubv4"
+	"golang.org/x/oauth2"
 )
 
 // maxCommentLength is the maximum number of chars allowed in a single comment
@@ -40,6 +41,7 @@ type GithubClient struct {
 	user           string
 	client         *github.Client
 	v4MutateClient *graphql.Client
+	v4QueryClient  *githubv4.Client
 	ctx            context.Context
 	logger         logging.SimpleLogging
 }
@@ -91,6 +93,16 @@ func NewGithubClient(hostname string, credentials GithubCredentials, logger logg
 		transport,
 		graphql.WithHeader("Accept", "application/vnd.github.queen-beryl-preview+json"),
 	)
+	token, err := credentials.GetToken()
+	if err != nil {
+		return nil, errors.Wrap(err, "Failed to get GitHub token")
+	}
+	src := oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: token},
+	)
+	httpClient := oauth2.NewClient(context.Background(), src)
+	// Use the client from shurcooL's githubv4 library for queries.
+	v4QueryClient := githubv4.NewEnterpriseClient(graphqlURL, httpClient)
 
 	user, err := credentials.GetUser()
 	logger.Debug("GH User: %s", user)
@@ -102,6 +114,7 @@ func NewGithubClient(hostname string, credentials GithubCredentials, logger logg
 		user:           user,
 		client:         client,
 		v4MutateClient: v4MutateClient,
+		v4QueryClient:  v4QueryClient,
 		ctx:            context.Background(),
 		logger:         logger,
 	}, nil
@@ -461,7 +474,7 @@ func (g *GithubClient) GetTeamNamesForUser(repo models.Repo, user models.User) (
 	var teamNames []string
 	ctx := context.Background()
 	for {
-		err := g.v4MutateClient.Query(ctx, &q, variables)
+		err := g.v4QueryClient.Query(ctx, &q, variables)
 		if err != nil {
 			return nil, err
 		}

server/events/vcs/github_client_test.go

@@ -981,3 +981,49 @@ func TestGithubClient_Retry404Files(t *testing.T) {
 	Ok(t, err)
 	Equals(t, 3, numCalls)
 }
+
+// GetTeamNamesForUser returns a list of team names for a user.
+func TestGithubClient_GetTeamNamesForUser(t *testing.T) {
+	logger := logging.NewNoopLogger(t)
+	// Mocked GraphQL response for two teams
+	resp := `{
+		"data":{
+		  "organization": {
+			"teams":{
+				"edges":[
+					{"node":{"name":"frontend-developers"}},
+					{"node":{"name":"employees"}}
+				],
+				"pageInfo":{
+					"endCursor":"Y3Vyc29yOnYyOpHOAFMoLQ==",
+					"hasNextPage":false
+				}
+			}
+		}
+	  }
+	}`
+	testServer := httptest.NewTLSServer(
+		http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			switch r.RequestURI {
+			case "/api/graphql":
+				w.Write([]byte(resp)) // nolint: errcheck
+			default:
+				t.Errorf("got unexpected request at %q", r.RequestURI)
+				http.Error(w, "not found", http.StatusNotFound)
+				return
+			}
+		}))
+	testServerURL, err := url.Parse(testServer.URL)
+	Ok(t, err)
+	client, err := vcs.NewGithubClient(testServerURL.Host, &vcs.GithubUserCredentials{"user", "pass"}, logger)
+	Ok(t, err)
+	defer disableSSLVerification()()
+
+	teams, err := client.GetTeamNamesForUser(models.Repo{
+		Owner: "testrepo",
+	}, models.User{
+		Username: "testuser",
+	})
+	Ok(t, err)
+	Equals(t, []string{"frontend-developers", "employees"}, teams)
+}