Added cache, funcspec and implemented total cache

pkg/cache/cache_test.go

@@ -0,0 +1,69 @@
+package cache
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestSetDefaultCache(t *testing.T) {
+	// Create a custom cache instance
+	provider := NewMemoryProvider(&Options{
+		DefaultTTL: 1 * time.Minute,
+		MaxSize:    50,
+	})
+	customCache := NewCache(provider)
+
+	// Set it as the default
+	SetDefaultCache(customCache)
+
+	// Verify it's now the default
+	retrievedCache := GetDefaultCache()
+	if retrievedCache != customCache {
+		t.Error("SetDefaultCache did not set the cache correctly")
+	}
+
+	// Test that we can use it
+	ctx := context.Background()
+	testKey := "test_key"
+	testValue := "test_value"
+
+	err := retrievedCache.Set(ctx, testKey, testValue, time.Minute)
+	if err != nil {
+		t.Fatalf("Failed to set value: %v", err)
+	}
+
+	var result string
+	err = retrievedCache.Get(ctx, testKey, &result)
+	if err != nil {
+		t.Fatalf("Failed to get value: %v", err)
+	}
+
+	if result != testValue {
+		t.Errorf("Expected %s, got %s", testValue, result)
+	}
+
+	// Clean up - reset to default
+	SetDefaultCache(nil)
+}
+
+func TestGetDefaultCacheInitialization(t *testing.T) {
+	// Reset to nil first
+	SetDefaultCache(nil)
+
+	// GetDefaultCache should auto-initialize
+	cache := GetDefaultCache()
+	if cache == nil {
+		t.Error("GetDefaultCache should auto-initialize, got nil")
+	}
+
+	// Should be usable
+	ctx := context.Background()
+	err := cache.Set(ctx, "test", "value", time.Minute)
+	if err != nil {
+		t.Errorf("Failed to use auto-initialized cache: %v", err)
+	}
+
+	// Clean up
+	SetDefaultCache(nil)
+}