初始提交：OCI 面板后端（含 GenAI 网关一期）

internal/cache/ttlcache_test.go

@@ -0,0 +1,95 @@
+package cache
+
+import (
+	"errors"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func TestGetSetExpiry(t *testing.T) {
+	c := New(10)
+	if _, ok := c.Get("k"); ok {
+		t.Fatal("空缓存不应命中")
+	}
+	c.Set("k", "v", 50*time.Millisecond)
+	if v, ok := c.Get("k"); !ok || v.(string) != "v" {
+		t.Fatalf("Get = %v %v, want v true", v, ok)
+	}
+	// jitter ≤ TTL/10,60ms 覆盖 50+5ms 上限
+	time.Sleep(60 * time.Millisecond)
+	if _, ok := c.Get("k"); ok {
+		t.Error("过期后不应命中")
+	}
+}
+
+func TestDeletePrefix(t *testing.T) {
+	c := New(10)
+	c.Set("t1|a", 1, time.Minute)
+	c.Set("t1|b", 2, time.Minute)
+	c.Set("t2|a", 3, time.Minute)
+	c.DeletePrefix("t1|")
+	if _, ok := c.Get("t1|a"); ok {
+		t.Error("t1|a 应被前缀删除")
+	}
+	if _, ok := c.Get("t2|a"); !ok {
+		t.Error("t2|a 不应被删除")
+	}
+}
+
+func TestEvictAtMax(t *testing.T) {
+	c := New(2)
+	c.Set("a", 1, time.Minute)
+	c.Set("b", 2, time.Minute)
+	c.Set("c", 3, time.Minute)
+	if n := len(c.items); n > 2 {
+		t.Errorf("键数 = %d, 应不超过上限 2", n)
+	}
+	if _, ok := c.Get("c"); !ok {
+		t.Error("最新写入的键应存在")
+	}
+}
+
+func TestDoSingleflight(t *testing.T) {
+	c := New(10)
+	var calls atomic.Int32
+	var wg sync.WaitGroup
+	for i := 0; i < 8; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			v, err := Do(c, "k", time.Minute, func() (int, error) {
+				calls.Add(1)
+				time.Sleep(30 * time.Millisecond)
+				return 42, nil
+			})
+			if err != nil || v != 42 {
+				t.Errorf("Do = %d, %v", v, err)
+			}
+		}()
+	}
+	wg.Wait()
+	if n := calls.Load(); n != 1 {
+		t.Errorf("并发 miss 回源 %d 次, want 1", n)
+	}
+	// 命中缓存不再回源
+	if _, err := Do(c, "k", time.Minute, func() (int, error) { calls.Add(1); return 0, nil }); err != nil {
+		t.Fatal(err)
+	}
+	if n := calls.Load(); n != 1 {
+		t.Errorf("命中后回源 %d 次, want 1", n)
+	}
+}
+
+func TestDoErrorNotCached(t *testing.T) {
+	c := New(10)
+	boom := errors.New("boom")
+	if _, err := Do(c, "k", time.Minute, func() (int, error) { return 0, boom }); !errors.Is(err, boom) {
+		t.Fatalf("err = %v, want boom", err)
+	}
+	v, err := Do(c, "k", time.Minute, func() (int, error) { return 7, nil })
+	if err != nil || v != 7 {
+		t.Errorf("错误不应入缓存,重试 = %d, %v", v, err)
+	}
+}