Update file_helper_test.go (fix errcheck issue) (#28983)

server/.golangci.yml

@@ -101,7 +101,6 @@ issues:
         channels/app/export_test.go|\
         channels/app/file.go|\
         channels/app/file_bench_test.go|\
-        channels/app/file_helper_test.go|\
         channels/app/file_info.go|\
         channels/app/file_test.go|\
         channels/app/helper_test.go|\

server/channels/app/file_helper_test.go

@@ -15,10 +15,11 @@ import (
 func TestFilterInaccessibleFiles(t *testing.T) {
 	th := Setup(t)
 	th.App.Srv().SetLicense(model.NewTestLicense("cloud"))
-	th.App.Srv().Store().System().Save(&model.System{
+	err := th.App.Srv().Store().System().Save(&model.System{
 		Name:  model.SystemLastAccessibleFileTime,
 		Value: "2",
 	})
+	require.NoError(t, err)
 
 	defer th.TearDown()
 
@@ -117,10 +118,11 @@ func TestFilterInaccessibleFiles(t *testing.T) {
 func TestGetFilteredAccessibleFiles(t *testing.T) {
 	th := Setup(t)
 	th.App.Srv().SetLicense(model.NewTestLicense("cloud"))
-	th.App.Srv().Store().System().Save(&model.System{
+	err := th.App.Srv().Store().System().Save(&model.System{
 		Name:  model.SystemLastAccessibleFileTime,
 		Value: "2",
 	})
+	require.NoError(t, err)
 
 	defer th.TearDown()
 
@@ -158,10 +160,11 @@ func TestGetFilteredAccessibleFiles(t *testing.T) {
 func TestIsInaccessibleFile(t *testing.T) {
 	th := Setup(t)
 	th.App.Srv().SetLicense(model.NewTestLicense("cloud"))
-	th.App.Srv().Store().System().Save(&model.System{
+	err := th.App.Srv().Store().System().Save(&model.System{
 		Name:  model.SystemLastAccessibleFileTime,
 		Value: "2",
 	})
+	require.NoError(t, err)
 
 	defer th.TearDown()
 
@@ -179,10 +182,11 @@ func TestIsInaccessibleFile(t *testing.T) {
 func TestRemoveInaccessibleContentFromFilesSlice(t *testing.T) {
 	th := Setup(t)
 	th.App.Srv().SetLicense(model.NewTestLicense("cloud"))
-	th.App.Srv().Store().System().Save(&model.System{
+	err := th.App.Srv().Store().System().Save(&model.System{
 		Name:  model.SystemLastAccessibleFileTime,
 		Value: "2",
 	})
+	require.NoError(t, err)
 
 	defer th.TearDown()