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configuration_test.lua
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configuration_test.lua
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local cjson = require("cjson")
local configuration = require("configuration")
local unmocked_ngx = _G.ngx
local certificate_data = ngx.shared.certificate_data
local certificate_servers = ngx.shared.certificate_servers
local ocsp_response_cache = ngx.shared.ocsp_response_cache
local function get_backends()
return {
{
name = "my-dummy-backend-1", ["load-balance"] = "sticky",
endpoints = { { address = "10.183.7.40", port = "8080", maxFails = 0, failTimeout = 0 } },
sessionAffinityConfig = { name = "cookie", cookieSessionAffinity = { name = "route" } },
},
{
name = "my-dummy-backend-2", ["load-balance"] = "ewma",
endpoints = {
{ address = "10.184.7.40", port = "7070", maxFails = 3, failTimeout = 2 },
{ address = "10.184.7.41", port = "7070", maxFails = 2, failTimeout = 1 },
}
},
{
name = "my-dummy-backend-3", ["load-balance"] = "round_robin",
endpoints = {
{ address = "10.185.7.40", port = "6060", maxFails = 0, failTimeout = 0 },
{ address = "10.185.7.41", port = "6060", maxFails = 2, failTimeout = 1 },
}
},
}
end
local function get_mocked_ngx_env()
local _ngx = {
status = ngx.HTTP_OK,
var = {},
req = {
read_body = function() end,
get_body_data = function() return cjson.encode(get_backends()) end,
get_body_file = function() return nil end,
},
log = function(msg) end,
}
setmetatable(_ngx, {__index = _G.ngx})
return _ngx
end
describe("Configuration", function()
before_each(function()
_G.ngx = get_mocked_ngx_env()
package.loaded["configuration"] = nil
configuration = require("configuration")
end)
after_each(function()
_G.ngx = unmocked_ngx
end)
describe("Backends", function()
context("Request method is neither GET nor POST", function()
it("sends 'Only POST and GET requests are allowed!' in the response body", function()
ngx.var.request_method = "PUT"
local s = spy.on(ngx, "print")
assert.has_no.errors(configuration.call)
assert.spy(s).was_called_with("Only POST and GET requests are allowed!")
end)
it("returns a status code of 400", function()
ngx.var.request_method = "PUT"
assert.has_no.errors(configuration.call)
assert.equal(ngx.status, ngx.HTTP_BAD_REQUEST)
end)
end)
context("GET request to /configuration/backends", function()
before_each(function()
ngx.var.request_method = "GET"
ngx.var.request_uri = "/configuration/backends"
end)
it("returns the current configured backends on the response body", function()
-- Encoding backends since comparing tables fail due to reference comparison
local encoded_backends = cjson.encode(get_backends())
ngx.shared.configuration_data:set("backends", encoded_backends)
local s = spy.on(ngx, "print")
assert.has_no.errors(configuration.call)
assert.spy(s).was_called_with(encoded_backends)
end)
it("returns a status of 200", function()
assert.has_no.errors(configuration.call)
assert.equal(ngx.status, ngx.HTTP_OK)
end)
end)
context("POST request to /configuration/backends", function()
before_each(function()
ngx.var.request_method = "POST"
ngx.var.request_uri = "/configuration/backends"
end)
it("stores the posted backends on the shared dictionary", function()
-- Encoding backends since comparing tables fail due to reference comparison
assert.has_no.errors(configuration.call)
assert.equal(ngx.shared.configuration_data:get("backends"), cjson.encode(get_backends()))
end)
context("Failed to read request body", function()
local mocked_get_body_data = ngx.req.get_body_data
before_each(function()
ngx.req.get_body_data = function() return nil end
end)
teardown(function()
ngx.req.get_body_data = mocked_get_body_data
end)
it("returns a status of 400", function()
local original_io_open = _G.io.open
_G.io.open = function(filename, extension) return false end
assert.has_no.errors(configuration.call)
assert.equal(ngx.status, ngx.HTTP_BAD_REQUEST)
_G.io.open = original_io_open
end)
it("logs 'dynamic-configuration: unable to read valid request body to stderr'", function()
local original_io_open = _G.io.open
_G.io.open = function(filename, extension) return false end
local s = spy.on(ngx, "log")
assert.has_no.errors(configuration.call)
assert.spy(s).was_called_with(ngx.ERR, "dynamic-configuration: unable to read valid request body")
_G.io.open = original_io_open
end)
end)
context("Failed to set the new backends to the configuration dictionary", function()
local resty_configuration_data_set = ngx.shared.configuration_data.set
before_each(function()
ngx.shared.configuration_data.set = function(key, value) return false, "" end
end)
teardown(function()
ngx.shared.configuration_data.set = resty_configuration_data_set
end)
it("returns a status of 400", function()
assert.has_no.errors(configuration.call)
assert.equal(ngx.status, ngx.HTTP_BAD_REQUEST)
end)
it("logs 'dynamic-configuration: error updating configuration:' to stderr", function()
local s = spy.on(ngx, "log")
assert.has_no.errors(configuration.call)
assert.spy(s).was_called_with(ngx.ERR, "dynamic-configuration: error updating configuration: ")
end)
end)
context("Succeeded to update backends configuration", function()
it("returns a status of 201", function()
assert.has_no.errors(configuration.call)
assert.equal(ngx.status, ngx.HTTP_CREATED)
end)
end)
end)
end)
describe("handle_servers()", function()
local UUID = "2ea8adb5-8ebb-4b14-a79b-0cdcd892e884"
local function mock_ssl_configuration(configuration)
local json = cjson.encode(configuration)
ngx.req.get_body_data = function() return json end
end
before_each(function()
ngx.var.request_method = "POST"
end)
it("should not accept non POST methods", function()
ngx.var.request_method = "GET"
local s = spy.on(ngx, "print")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s).was_called_with("Only POST requests are allowed!")
assert.same(ngx.status, ngx.HTTP_BAD_REQUEST)
end)
it("should not delete ocsp_response_cache if certificate remain the same", function()
ngx.shared.certificate_data.get = function(self, uid)
return "pemCertKey"
end
mock_ssl_configuration({
servers = { ["hostname"] = UUID },
certificates = { [UUID] = "pemCertKey" }
})
local s = spy.on(ngx.shared.ocsp_response_cache, "delete")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s).was_not_called()
end)
it("should not delete ocsp_response_cache if certificate is empty", function()
ngx.shared.certificate_data.get = function(self, uid)
return nil
end
mock_ssl_configuration({
servers = { ["hostname"] = UUID },
certificates = { [UUID] = "pemCertKey" }
})
local s = spy.on(ngx.shared.ocsp_response_cache, "delete")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s).was_not_called()
end)
it("should delete ocsp_response_cache if certificate changed", function()
local stored_entries = {
[UUID] = "pemCertKey"
}
ngx.shared.certificate_data.get = function(self, uid)
return stored_entries[uid]
end
mock_ssl_configuration({
servers = { ["hostname"] = UUID },
certificates = { [UUID] = "pemCertKey2" }
})
local s = spy.on(ngx.shared.ocsp_response_cache, "delete")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s).was.called_with(ocsp_response_cache, UUID)
end)
it("deletes server with empty UID without touching the corresponding certificate", function()
mock_ssl_configuration({
servers = { ["hostname"] = UUID },
certificates = { [UUID] = "pemCertKey" }
})
assert.has_no.errors(configuration.handle_servers)
assert.same("pemCertKey", certificate_data:get(UUID))
assert.same(UUID, certificate_servers:get("hostname"))
assert.same(ngx.HTTP_CREATED, ngx.status)
local EMPTY_UID = "-1"
mock_ssl_configuration({
servers = { ["hostname"] = EMPTY_UID },
certificates = { [UUID] = "pemCertKey" }
})
assert.has_no.errors(configuration.handle_servers)
assert.same("pemCertKey", certificate_data:get(UUID))
assert.same(nil, certificate_servers:get("hostname"))
assert.same(ngx.HTTP_CREATED, ngx.status)
end)
it("should successfully update certificates and keys for each host", function()
mock_ssl_configuration({
servers = { ["hostname"] = UUID },
certificates = { [UUID] = "pemCertKey" }
})
assert.has_no.errors(configuration.handle_servers)
assert.same("pemCertKey", certificate_data:get(UUID))
assert.same(UUID, certificate_servers:get("hostname"))
assert.same(ngx.HTTP_CREATED, ngx.status)
end)
it("should log an err and set status to Internal Server Error when a certificate cannot be set", function()
local uuid2 = "8ea8adb5-8ebb-4b14-a79b-0cdcd892e999"
ngx.shared.certificate_data.set = function(self, uuid, certificate)
return false, "error", nil
end
mock_ssl_configuration({
servers = { ["hostname"] = UUID, ["hostname2"] = uuid2 },
certificates = { [UUID] = "pemCertKey", [uuid2] = "pemCertKey2" }
})
local s = spy.on(ngx, "log")
assert.has_no.errors(configuration.handle_servers)
assert.same(ngx.HTTP_INTERNAL_SERVER_ERROR, ngx.status)
end)
it("logs a warning when entry is forcibly stored", function()
local uuid2 = "8ea8adb5-8ebb-4b14-a79b-0cdcd892e999"
local stored_entries = {}
ngx.shared.certificate_data.set = function(self, uuid, certificate)
stored_entries[uuid] = certificate
return true, nil, true
end
mock_ssl_configuration({
servers = { ["hostname"] = UUID, ["hostname2"] = uuid2 },
certificates = { [UUID] = "pemCertKey", [uuid2] = "pemCertKey2" }
})
local s1 = spy.on(ngx, "log")
assert.has_no.errors(configuration.handle_servers)
assert.spy(s1).was_called_with(ngx.WARN, string.format("certificate_data dictionary is full, LRU entry has been removed to store %s", UUID))
assert.equal("pemCertKey", stored_entries[UUID])
assert.equal("pemCertKey2", stored_entries[uuid2])
assert.same(ngx.HTTP_CREATED, ngx.status)
end)
end)
end)