#55 add invalid release test

Author: hyperion-cs

update_test.go

@@ -110,6 +110,14 @@ func TestNotExistingCommandPath(t *testing.T) {
 	assert.Contains(t, err.Error(), "file may not exist")
 }
 
+func TestUpdateToInvalidRelease(t *testing.T) {
+	updater, err := NewUpdater(Config{Source: &MockSource{}})
+	require.NoError(t, err)
+
+	err = updater.UpdateTo(context.Background(), nil, "", "")
+	assert.ErrorIs(t, err, ErrInvalidRelease)
+}
+
 func TestNoReleaseFoundForUpdate(t *testing.T) {
 	finalVersion := "1.0.0"
 	fake := filepath.FromSlash("./testdata/fake-executable")