Add tests for AlbumPlayCountMode, change the calc to match the reques…

…t from #1032

persistence/album_repository.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"math"
 	"strings"
 
 	. "github.com/Masterminds/squirrel"
@@ -174,7 +175,7 @@ func (r *albumRepository) toModels(dba []dbAlbum) model.Albums {
 	res := model.Albums{}
 	for i := range dba {
 		if conf.Server.AlbumPlayCountMode == consts.AlbumPlayCountModeNormalized && dba[i].Album.SongCount != 0 {
-			dba[i].Album.PlayCount = (dba[i].Album.PlayCount + (int64(dba[i].Album.SongCount) - 1)) / int64(dba[i].Album.SongCount)
+			dba[i].Album.PlayCount = int64(math.Round(float64(dba[i].Album.PlayCount) / float64(dba[i].Album.SongCount)))
 		}
 		res = append(res, *dba[i].Album)
 	}

persistence/album_repository_test.go

@@ -120,10 +120,13 @@ var _ = Describe("AlbumRepository", func() {
 				albums := repo.toModels(dba)
 				Expect(albums[0].PlayCount).To(Equal(int64(expected)))
 			},
+			Entry("1 song, 0 plays", 1, 0, 0),
 			Entry("1 song, 4 plays", 1, 4, 4),
 			Entry("3 songs, 6 plays", 3, 6, 6),
+			Entry("10 songs, 6 plays", 10, 6, 6),
 			Entry("70 songs, 70 plays", 70, 70, 70),
 			Entry("10 songs, 50 plays", 10, 50, 50),
+			Entry("120 songs, 121 plays", 120, 121, 121),
 		)
 
 		DescribeTable("normalizes play count when AlbumPlayCountMode is normalized",
@@ -135,10 +138,13 @@ var _ = Describe("AlbumRepository", func() {
 				albums := repo.toModels(dba)
 				Expect(albums[0].PlayCount).To(Equal(int64(expected)))
 			},
+			Entry("1 song, 0 plays", 1, 0, 0),
 			Entry("1 song, 4 plays", 1, 4, 4),
 			Entry("3 songs, 6 plays", 3, 6, 2),
+			Entry("10 songs, 6 plays", 10, 6, 1),
 			Entry("70 songs, 70 plays", 70, 70, 1),
 			Entry("10 songs, 50 plays", 10, 50, 5),
+			Entry("120 songs, 121 plays", 120, 121, 1),
 		)
 	})
 })