74 lines
2.8 KiB
Lua
74 lines
2.8 KiB
Lua
describe("resolve", function()
|
|
local dns = require("util.dns")
|
|
local dns_helper = require("test/dns_helper")
|
|
|
|
it("sets correct nameservers", function()
|
|
dns_helper.mock_new(function(self, options)
|
|
assert.are.same({ nameservers = { "1.2.3.4", "4.5.6.7" }, retrans = 5, timeout = 2000 }, options)
|
|
return nil, ""
|
|
end, { "1.2.3.4", "4.5.6.7" })
|
|
dns.resolve("example.com")
|
|
end)
|
|
|
|
it("returns host when an error happens", function()
|
|
local s_ngx_log = spy.on(ngx, "log")
|
|
|
|
dns_helper.mock_new(function(...) return nil, "an error" end)
|
|
assert.are.same({ "example.com" }, dns.resolve("example.com"))
|
|
assert.spy(s_ngx_log).was_called_with(ngx.ERR, "failed to instantiate the resolver: an error")
|
|
|
|
dns_helper.mock_dns_query(nil, "oops!")
|
|
assert.are.same({ "example.com" }, dns.resolve("example.com"))
|
|
assert.spy(s_ngx_log).was_called_with(ngx.ERR, "failed to query the DNS server:\noops!\noops!")
|
|
|
|
dns_helper.mock_dns_query({ errcode = 1, errstr = "format error" })
|
|
assert.are.same({ "example.com" }, dns.resolve("example.com"))
|
|
assert.spy(s_ngx_log).was_called_with(ngx.ERR, "failed to query the DNS server:\nserver returned error code: 1: format error\nserver returned error code: 1: format error")
|
|
|
|
dns_helper.mock_dns_query({})
|
|
assert.are.same({ "example.com" }, dns.resolve("example.com"))
|
|
assert.spy(s_ngx_log).was_called_with(ngx.ERR, "failed to query the DNS server:\nno record resolved\nno record resolved")
|
|
|
|
dns_helper.mock_dns_query({ { name = "example.com", cname = "sub.example.com", ttl = 60 } })
|
|
assert.are.same({ "example.com" }, dns.resolve("example.com"))
|
|
assert.spy(s_ngx_log).was_called_with(ngx.ERR, "failed to query the DNS server:\nno record resolved\nno record resolved")
|
|
end)
|
|
|
|
it("resolves all A records of given host, caches them with minimal ttl and returns from cache next time", function()
|
|
dns_helper.mock_dns_query({
|
|
{
|
|
name = "example.com",
|
|
address = "192.168.1.1",
|
|
ttl = 3600,
|
|
},
|
|
{
|
|
name = "example.com",
|
|
address = "1.2.3.4",
|
|
ttl = 60,
|
|
}
|
|
})
|
|
|
|
local lrucache = require("resty.lrucache")
|
|
local old_lrucache_new = lrucache.new
|
|
lrucache.new = function(...)
|
|
local cache = old_lrucache_new(...)
|
|
|
|
local old_set = cache.set
|
|
cache.set = function(self, key, value, ttl)
|
|
assert.equal("example.com", key)
|
|
assert.are.same({ "192.168.1.1", "1.2.3.4" }, value)
|
|
assert.equal(60, ttl)
|
|
return old_set(self, key, value, ttl)
|
|
end
|
|
|
|
return cache
|
|
end
|
|
|
|
assert.are.same({ "192.168.1.1", "1.2.3.4" }, dns.resolve("example.com"))
|
|
|
|
dns_helper.mock_new(function(...)
|
|
error("expected to short-circuit and return response from cache")
|
|
end)
|
|
assert.are.same({ "192.168.1.1", "1.2.3.4" }, dns.resolve("example.com"))
|
|
end)
|
|
end)
|