Add caching for file infos (#5330)

api/post_test.go

@@ -136,7 +136,7 @@ func TestCreatePost(t *testing.T) {
 	} else if rpost9 := resp.Data.(*model.Post); len(rpost9.FileIds) != 3 {
 		t.Fatal("post should have 3 files")
 	} else {
-		infos := store.Must(app.Srv.Store.FileInfo().GetForPost(rpost9.Id)).([]*model.FileInfo)
+		infos := store.Must(app.Srv.Store.FileInfo().GetForPost(rpost9.Id, true)).([]*model.FileInfo)
 
 		if len(infos) != 3 {
 			t.Fatal("should've attached all 3 files to post")
@@ -1184,6 +1184,7 @@ func TestGetMessageForNotification(t *testing.T) {
 
 	post.FileIds = model.StringArray{testPng.Id, testJpg1.Id}
 	store.Must(app.Srv.Store.FileInfo().AttachToPost(testJpg1.Id, post.Id))
+	app.Srv.Store.FileInfo().InvalidateFileInfosForPostCache(post.Id)
 	if message := app.GetMessageForNotification(post, translateFunc); message != "2 images sent: test1.png, test2.jpg" && message != "2 images sent: test2.jpg, test1.png" {
 		t.Fatal("should've returned number of images:", message)
 	}
@@ -1196,6 +1197,7 @@ func TestGetMessageForNotification(t *testing.T) {
 	}
 
 	store.Must(app.Srv.Store.FileInfo().AttachToPost(testJpg2.Id, post.Id))
+	app.Srv.Store.FileInfo().InvalidateFileInfosForPostCache(post.Id)
 	post.FileIds = model.StringArray{testFile.Id, testJpg2.Id}
 	if message := app.GetMessageForNotification(post, translateFunc); message != "2 files sent: test1.go, test3.jpg" && message != "2 files sent: test3.jpg, test1.go" {
 		t.Fatal("should've returned number of mixed files:", message)