Fix Output Device toggle

internal/page/AudioOptions_test.go

@@ -0,0 +1,29 @@
+package page
+
+import "testing"
+
+func TestMoveFocus(t *testing.T) {
+	tests := []struct {
+		name    string
+		current int
+		delta   int
+		want    int
+	}{
+		{"down from track goes to device", 0, 1, 1},
+		{"down from device goes to toggle", 1, 1, focusToggle},
+		{"down from toggle stays", focusToggle, 1, focusToggle},
+		{"up from toggle goes to device", focusToggle, -1, 1},
+		{"up from device goes to track", 1, -1, 0},
+		{"up from track stays", 0, -1, 0},
+		{"down does not overshoot below toggle", focusToggle, 5, focusToggle},
+		{"up does not undershoot above track", 0, -5, 0},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := moveFocus(tt.current, tt.delta); got != tt.want {
+				t.Errorf("moveFocus(%d, %d) = %d, want %d", tt.current, tt.delta, got, tt.want)
+			}
+		})
+	}
+}