Function TestPrefetch

plugin/cache/prefetch_test.go:18–203

(t *testing.T)

)

func TestPrefetch(t *testing.T) {
	tests := []struct {
		qname         string
		ttl           int
		prefetch      int
		verifications []verification
	}{
		{
			qname:    "hits.reset.example.org.",
			ttl:      80,
			prefetch: 1,
			verifications: []verification{
				{
					after:  0 * time.Second,
					answer: "hits.reset.example.org. 80 IN A 127.0.0.1",
					fetch:  true, // Initial fetch
				},
				{
					after:  73 * time.Second,
					answer: "hits.reset.example.org.  7 IN A 127.0.0.1",
					fetch:  true, // Triggers prefetch with 7 TTL (10% of 80 = 8 TTL threshold)
				},
				{
					after:  80 * time.Second,
					answer: "hits.reset.example.org. 73 IN A 127.0.0.2",
				},
			},
		},
		{
			qname:    "short.ttl.example.org.",
			ttl:      5,
			prefetch: 1,
			verifications: []verification{
				{
					after:  0 * time.Second,
					answer: "short.ttl.example.org. 5 IN A 127.0.0.1",
					fetch:  true,
				},
				{
					after:  1 * time.Second,
					answer: "short.ttl.example.org. 4 IN A 127.0.0.1",
				},
				{
					after:  4 * time.Second,
					answer: "short.ttl.example.org. 1 IN A 127.0.0.1",
					fetch:  true,
				},
				{
					after:  5 * time.Second,
					answer: "short.ttl.example.org. 4 IN A 127.0.0.2",
				},
			},
		},
		{
			qname:    "no.prefetch.example.org.",
			ttl:      30,
			prefetch: 0,
			verifications: []verification{