Add test for generateUploadHash

service/applemusic/applemusic_test.go

···
+package applemusic
+
+import (
+	"strings"
+	"testing"
+)
+
+// Helper to create AppleRecentTrack for testing
+func makeTestTrack(name, album, artist string) *AppleRecentTrack {
+	track := &AppleRecentTrack{}
+	track.Attributes.Name = name
+	track.Attributes.AlbumName = album
+	track.Attributes.ArtistName = artist
+	return track
+}
+
+func TestGenerateUploadHash(t *testing.T) {
+	tests := []struct {
+		name     string
+		track    *AppleRecentTrack
+		wantHash string
+	}{
+		{
+			name:     "basic track",
+			track:    makeTestTrack("Test Song", "Test Album", "Test Artist"),
+			wantHash: "am_uploaded_ec50bb20ebeddc6f04cb65bcff156fed3c59d7e311e3d3efbbea506c3f8ad5ae",
+		},
+		{
+			name:     "track with different data",
+			track:    makeTestTrack("Collaboration", "Best Hits", "Artist One"),
+			wantHash: "am_uploaded_c387e87af520fd4dae9b9cb872bd9cfbc8f7a88ca1b49d874dc1045183ba43c3",
+		},
+		{
+			name:     "track with empty album",
+			track:    makeTestTrack("Single Track", "", "Solo Artist"),
+			wantHash: "am_uploaded_f73402f47a46c5ff050b64a86d5a1fcbaa20a734a8963f458dca81be290731f7",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := generateUploadHash(tt.track)
+
+			// The hash should be prefixed with "am_uploaded_" so that it's clear it's an uploaded Apple Music track
+			if !strings.HasPrefix(got, "am_uploaded_") {
+				t.Errorf("generateUploadHash() = %v, want prefix 'am_uploaded_'", got)
+			}
+
+			if got != tt.wantHash {
+				t.Errorf("generateUploadHash() = %v, want %v", got, tt.wantHash)
+			}
+
+			// Hash is deterministic -- same track will return same hash
+			got2 := generateUploadHash(tt.track)
+			if got != got2 {
+				t.Errorf("generateUploadHash() is not deterministic: first=%v, second=%v", got, got2)
+			}
+		})
+	}
+}