Function TestPreferenceManager_ApplyDecay

pkg/memory/preference_test.go:340–378

(t *testing.T)

}

func TestPreferenceManager_ApplyDecay(t *testing.T) {
	config := DefaultPreferenceManagerConfig()
	config.StrengthDecay = 0.5 // 每天衰减 50%
	config.MinStrength = 0.3
	manager := NewPreferenceManager(config)

	// 添加偏好
	pref := &Preference{
		UserID:     "user-1",
		Category:   CategoryUI,
		Key:        "theme",
		Value:      "dark",
		Strength:   0.8,
		Confidence: 0.9,
	}
	if err := manager.AddPreference(context.Background(), pref); err != nil {
		t.Fatalf("AddPreference failed: %v", err)
	}

	// 手动设置更新时间为 1 天前
	manager.mu.Lock()
	pref.UpdatedAt = time.Now().Add(-24 * time.Hour)
	manager.mu.Unlock()

	// 应用衰减
	removed := manager.ApplyDecay(context.Background())

	// 验证强度衰减
	updated, _ := manager.GetPreference(context.Background(), "user-1", CategoryUI, "theme")
	expectedStrength := 0.8 * 0.5 // 衰减 50%

	if updated.Strength < expectedStrength-0.01 || updated.Strength > expectedStrength+0.01 {
		t.Errorf("Strength = %.2f, want ~%.2f", updated.Strength, expectedStrength)
	}

	if removed != 0 {
		t.Errorf("removed = %d, want 0", removed)
	}
}

func TestPreferenceManager_ApplyDecay_RemoveWeak(t *testing.T) {
	config := DefaultPreferenceManagerConfig()