89 lines
2.8 KiB
Go
89 lines
2.8 KiB
Go
package oci
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import (
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"context"
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"testing"
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)
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// countingClient 只实现被测方法并计数;其余方法经嵌入 nil 接口(不被调用)。
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type countingClient struct {
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Client
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instCalls int
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adCalls int
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launches int
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}
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func (f *countingClient) ListInstances(ctx context.Context, cred Credentials, region string) ([]Instance, error) {
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f.instCalls++
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return []Instance{{ID: "i-1", DisplayName: "b"}, {ID: "i-2", DisplayName: "a"}}, nil
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}
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func (f *countingClient) ListAvailabilityDomains(ctx context.Context, cred Credentials, region string) ([]string, error) {
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f.adCalls++
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return []string{"ad-1"}, nil
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}
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func (f *countingClient) LaunchInstance(ctx context.Context, cred Credentials, in CreateInstanceInput) (Instance, error) {
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f.launches++
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return Instance{ID: "i-new"}, nil
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}
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func testCred(tenancy string) Credentials { return Credentials{TenancyOCID: tenancy} }
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func TestCachedClientHitAndIsolation(t *testing.T) {
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inner := &countingClient{}
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c := NewCachedClient(inner)
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ctx := context.Background()
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for i := 0; i < 3; i++ {
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if _, err := c.ListInstances(ctx, testCred("t1"), "r1"); err != nil {
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t.Fatalf("ListInstances: %v", err)
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}
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}
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if inner.instCalls != 1 {
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t.Errorf("同 key 三连读回源 %d 次, want 1", inner.instCalls)
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}
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// 不同租户 / 区域各自回源
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_, _ = c.ListInstances(ctx, testCred("t2"), "r1")
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_, _ = c.ListInstances(ctx, testCred("t1"), "r2")
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if inner.instCalls != 3 {
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t.Errorf("跨租户/区域回源 %d 次, want 3", inner.instCalls)
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}
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}
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func TestCachedClientWriteBusts(t *testing.T) {
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inner := &countingClient{}
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c := NewCachedClient(inner)
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ctx := context.Background()
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_, _ = c.ListInstances(ctx, testCred("t1"), "r1")
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_, _ = c.ListAvailabilityDomains(ctx, testCred("t1"), "r1")
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_, _ = c.ListInstances(ctx, testCred("t2"), "r1")
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if _, err := c.LaunchInstance(ctx, testCred("t1"), CreateInstanceInput{}); err != nil {
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t.Fatalf("LaunchInstance: %v", err)
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}
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_, _ = c.ListInstances(ctx, testCred("t1"), "r1")
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_, _ = c.ListAvailabilityDomains(ctx, testCred("t1"), "r1")
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if inner.instCalls != 3 || inner.adCalls != 2 {
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t.Errorf("写后同租户应全部回源: inst=%d want 3, ad=%d want 2", inner.instCalls, inner.adCalls)
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}
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// 其他租户缓存不受影响
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_, _ = c.ListInstances(ctx, testCred("t2"), "r1")
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if inner.instCalls != 3 {
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t.Errorf("t2 缓存被误失效: inst=%d want 3", inner.instCalls)
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}
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}
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func TestCachedClientReturnsClone(t *testing.T) {
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inner := &countingClient{}
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c := NewCachedClient(inner)
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ctx := context.Background()
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first, _ := c.ListInstances(ctx, testCred("t1"), "r1")
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first[0], first[1] = first[1], first[0] // 调用方就地重排
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second, _ := c.ListInstances(ctx, testCred("t1"), "r1")
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if second[0].ID != "i-1" {
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t.Errorf("缓存底层数组被调用方污染: second[0]=%s, want i-1", second[0].ID)
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}
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}
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