misc improvements to graphqlbackend (#63943)

- skip graphqlbackend tests that use the DB when using `go test -short`
- fix race condition in (settingsResolver).Author
- fix OrgMembers.GetByOrgIDAndUserID mocks: The actual function returns
a non-nil error (`database.ErrOrgMemberNotFound` type) when the user is
not an org member. Our mocks should do the same for correctness.

## Test plan

CI

Author: sqs

cmd/frontend/graphqlbackend/default_settings.go

@@ -35,7 +35,7 @@ func (r *defaultSettingsResolver) LatestSettings(_ context.Context) (*settingsRe
 		Subject:  api.SettingsSubject{Default: true},
 		Contents: `{"experimentalFeatures": {}}`,
 	}
-	return &settingsResolver{r.db, &settingsSubjectResolver{defaultSettings: r}, settings, nil}, nil
+	return &settingsResolver{db: r.db, subject: &settingsSubjectResolver{defaultSettings: r}, settings: settings}, nil
 }
 
 func (r *defaultSettingsResolver) SettingsURL() *string { return nil }

cmd/frontend/graphqlbackend/org.go

@@ -253,7 +253,7 @@ func (o *OrgResolver) LatestSettings(ctx context.Context) (*settingsResolver, er
 		return nil, nil
 	}
 
-	return &settingsResolver{o.db, &settingsSubjectResolver{org: o}, settings, nil}, nil
+	return &settingsResolver{db: o.db, subject: &settingsSubjectResolver{org: o}, settings: settings}, nil
 }
 
 func (o *OrgResolver) SettingsCascade() *settingsCascade {

cmd/frontend/graphqlbackend/org_test.go

@@ -31,7 +31,7 @@ func TestOrganization(t *testing.T) {
 	users.GetByCurrentAuthUserFunc.SetDefaultReturn(&types.User{ID: 1}, nil)
 
 	orgMembers := dbmocks.NewMockOrgMemberStore()
-	orgMembers.GetByOrgIDAndUserIDFunc.SetDefaultReturn(nil, nil)
+	orgMembers.GetByOrgIDAndUserIDFunc.SetDefaultReturn(nil, &database.ErrOrgMemberNotFound{})
 
 	orgs := dbmocks.NewMockOrgStore()
 	mockedOrg := types.Org{ID: 1, Name: "acme"}

cmd/frontend/graphqlbackend/preview_repository_comparison_test.go

@@ -21,6 +21,10 @@ import (
 )
 
 func TestPreviewRepositoryComparisonResolver(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+
 	logger := logtest.Scoped(t)
 	ctx := context.Background()
 	db := database.NewDB(logger, nil)

cmd/frontend/graphqlbackend/repository_comparison_test.go

@@ -61,6 +61,10 @@ func TestRepositoryComparisonNoMergeBase(t *testing.T) {
 }
 
 func TestRepositoryComparisonRootCommit(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+
 	logger := logtest.Scoped(t)
 	ctx := context.Background()
 	db := database.NewDB(logger, nil)
@@ -94,6 +98,10 @@ func TestRepositoryComparisonRootCommit(t *testing.T) {
 }
 
 func TestRepositoryComparison(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+
 	logger := logtest.Scoped(t)
 	ctx := context.Background()
 	db := database.NewDB(logger, nil)

cmd/frontend/graphqlbackend/repository_text_search_index_test.go

@@ -20,6 +20,10 @@ import (
 )
 
 func TestRetrievingAndDeduplicatingIndexedRefs(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+
 	logger := logtest.Scoped(t)
 	db := database.NewDB(logger, nil)
 	defaultBranchRef := "refs/heads/main"

cmd/frontend/graphqlbackend/settings.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"os"
 	"strconv"
+	"sync"
 
 	"github.com/sourcegraph/sourcegraph/internal/api"
 	"github.com/sourcegraph/sourcegraph/internal/database"
@@ -17,7 +18,10 @@ type settingsResolver struct {
 	db       database.DB
 	subject  *settingsSubjectResolver
 	settings *api.Settings
-	user     *types.User
+
+	authorUserOnce sync.Once
+	authorUser     *types.User
+	authorUserErr  error
 }
 
 func (o *settingsResolver) ID() int32 {
@@ -45,14 +49,14 @@ func (o *settingsResolver) Author(ctx context.Context) (*UserResolver, error) {
 	if o.settings.AuthorUserID == nil {
 		return nil, nil
 	}
-	if o.user == nil {
-		var err error
-		o.user, err = o.db.Users().GetByID(ctx, *o.settings.AuthorUserID)
-		if err != nil {
-			return nil, err
-		}
+
+	o.authorUserOnce.Do(func() {
+		o.authorUser, o.authorUserErr = o.db.Users().GetByID(ctx, *o.settings.AuthorUserID)
+	})
+	if o.authorUserErr != nil {
+		return nil, o.authorUserErr
 	}
-	return NewUserResolver(ctx, o.db, o.user), nil
+	return NewUserResolver(ctx, o.db, o.authorUser), nil
 }
 
 var globalSettingsAllowEdits, _ = strconv.ParseBool(env.Get("GLOBAL_SETTINGS_ALLOW_EDITS", "false", "When GLOBAL_SETTINGS_FILE is in use, allow edits in the application to be made which will be overwritten on next process restart"))

cmd/frontend/graphqlbackend/site.go

@@ -156,7 +156,7 @@ func (r *siteResolver) LatestSettings(ctx context.Context) (*settingsResolver, e
 	if settings == nil {
 		return nil, nil
 	}
-	return &settingsResolver{r.db, &settingsSubjectResolver{site: r}, settings, nil}, nil
+	return &settingsResolver{db: r.db, subject: &settingsSubjectResolver{site: r}, settings: settings}, nil
 }
 
 func (r *siteResolver) SettingsCascade() *settingsCascade {

cmd/frontend/graphqlbackend/site_admin_test.go

@@ -307,7 +307,7 @@ func TestDeleteOrganization_OnPremise(t *testing.T) {
 	users.GetByCurrentAuthUserFunc.SetDefaultReturn(&types.User{ID: 1}, nil)
 
 	orgMembers := dbmocks.NewMockOrgMemberStore()
-	orgMembers.GetByOrgIDAndUserIDFunc.SetDefaultReturn(nil, nil)
+	orgMembers.GetByOrgIDAndUserIDFunc.SetDefaultReturn(nil, &database.ErrOrgMemberNotFound{})
 
 	orgs := dbmocks.NewMockOrgStore()
 

cmd/frontend/graphqlbackend/user.go

@@ -393,7 +393,7 @@ func (r *UserResolver) LatestSettings(ctx context.Context) (*settingsResolver, e
 	if settings == nil {
 		return nil, nil
 	}
-	return &settingsResolver{r.db, &settingsSubjectResolver{user: r}, settings, nil}, nil
+	return &settingsResolver{db: r.db, subject: &settingsSubjectResolver{user: r}, settings: settings}, nil
 }
 
 func (r *UserResolver) SettingsCascade() *settingsCascade {