Function TestCacheCNAME

proxy/cache_internal_test.go:222–257

(t *testing.T)

}

func TestCacheCNAME(t *testing.T) {
	testCache := newTestCache(t, nil)

	// Create a DNS request.
	request := (&dns.Msg{}).SetQuestion("google.com.", dns.TypeA)

	// Fill the cache
	reply := (&dns.Msg{
		MsgHdr: dns.MsgHdr{
			Response: true,
		},
		Answer: []dns.RR{newRR(t, "google.com.", dns.TypeCNAME, 3600, "test.google.com.")},
	}).SetQuestion("google.com.", dns.TypeA)
	testCache.set(request, reply, upstreamWithAddr, testLogger)

	t.Run("no_cnames", func(t *testing.T) {
		r, expired, _ := testCache.get(request)
		assert.Nil(t, r)
		assert.False(t, expired)
	})

	// Now fill the cache with a cacheable CNAME response.
	reply.Answer = append(reply.Answer, newRR(t, "google.com.", dns.TypeA, 3600, net.IP{8, 8, 8, 8}))
	testCache.set(request, reply, upstreamWithAddr, testLogger)

	// We are testing that a proper CNAME response gets cached
	t.Run("cnames_exist", func(t *testing.T) {
		r, expired, key := testCache.get(request)
		assert.False(t, expired)
		assert.Equal(t, key, msgToKey(request))

		require.NotNil(t, r)

		assert.Equal(t, testUpsAddr, r.u)
	})
}

func TestCache_uncacheable(t *testing.T) {
	testCache := newTestCache(t, nil)