77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
package common
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import (
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"encoding/json"
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"testing"
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"time"
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)
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func TestJitterTTLRange(t *testing.T) {
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base := 10 * time.Minute
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minTTL := base - base/10
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maxTTL := base + base/10
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for range 1000 {
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got := jitterTTL(base)
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if got < minTTL || got > maxTTL {
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t.Fatalf("jitterTTL(%v) = %v, want range [%v, %v]", base, got, minTTL, maxTTL)
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}
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}
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if got := jitterTTL(0); got != 0 {
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t.Fatalf("jitterTTL(0) = %v, want 0", got)
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}
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}
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// TestUnmarshalCopyIndependent 副本必须与 target 完全独立：改写副本不得波及 target，
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// 反之亦然（GetJSON L2 回填后调用方改写 target 不得产生缓存别名竞争）。
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func TestUnmarshalCopyIndependent(t *testing.T) {
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type seg struct {
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Name string `json:"name"`
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Mult float64 `json:"mult"`
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}
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type payload struct {
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TimeMultiplier float64 `json:"time_multiplier"`
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TimeRule string `json:"time_rule"`
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Segs []seg `json:"segs"`
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}
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target := payload{}
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jsonStr := `{"time_multiplier":1.5,"time_rule":"忙时","segs":[{"name":"a","mult":2}]}`
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if err := json.Unmarshal([]byte(jsonStr), &target); err != nil {
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t.Fatalf("unmarshal target: %v", err)
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}
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cpAny, err := unmarshalCopy(jsonStr, &target)
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if err != nil {
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t.Fatalf("unmarshalCopy: %v", err)
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}
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cp, ok := cpAny.(*payload)
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if !ok {
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t.Fatalf("unmarshalCopy 返回类型 %T, want *payload", cpAny)
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}
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// 初始值一致
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if cp.TimeRule != target.TimeRule || cp.TimeMultiplier != target.TimeMultiplier || len(cp.Segs) != len(target.Segs) {
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t.Fatalf("副本初始值与 target 不一致: %+v vs %+v", cp, &target)
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}
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// 改写副本不波及 target
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cp.TimeMultiplier = 0.5
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cp.TimeRule = "闲时"
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if target.TimeMultiplier != 1.5 || target.TimeRule != "忙时" {
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t.Fatalf("改写副本波及了 target: %+v", &target)
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}
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// 改写 target 不波及副本
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target.TimeMultiplier = 9.9
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if cp.TimeMultiplier != 0.5 {
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t.Fatalf("改写 target 波及了副本: %+v", cp)
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}
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}
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// TestUnmarshalCopyRejectsNonPointer 非 pointer target 必须报错而非 panic。
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func TestUnmarshalCopyRejectsNonPointer(t *testing.T) {
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if _, err := unmarshalCopy(`{}`, map[string]any{}); err == nil {
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t.Fatal("non-pointer target 应返回错误")
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}
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}
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