tests(rpc): rpc mock/hook

KAG-5551

bin/busted

@@ -19,6 +19,9 @@ local cert_path do
     busted_cert_content = busted_cert_content .. "\n" .. pl_file.read(system_cert_path)
   end
 
+  local cluster_cert_content = assert(pl_file.read("spec/fixtures/kong_clustering.crt"))
+  busted_cert_content = busted_cert_content .. "\n" .. cluster_cert_content
+
   pl_file.write(busted_cert_file, busted_cert_content)
   cert_path = busted_cert_file
 end

spec/02-integration/01-helpers/05-rpc-mock_spec.lua

@@ -0,0 +1,240 @@
+local helpers = require("spec.helpers")
+local misc = require("spec.internal.misc")
+local cp = require("spec.helpers.rpc_mock.cp")
+local dp = require("spec.helpers.rpc_mock.dp")
+local setup = require("spec.helpers.rpc_mock.setup")
+local get_node_id = misc.get_node_id
+local DP_PREFIX = "servroot_dp"
+
+describe("rpc mock/hooc", function()
+  lazy_setup(setup.setup)
+  lazy_teardown(setup.teardown)
+
+  describe("CP side mock", function()
+    local mocked_cp, node_id
+
+    lazy_setup(function()
+      local _, db = helpers.get_db_utils(nil, nil, { "rpc-hello-test" })
+
+      mocked_cp = cp.new({
+        plugins = "bundled,rpc-hello-test",
+      })
+
+      local service = assert(db.services:insert({
+        host = helpers.mock_upstream_host,
+      }))
+
+      assert(db.routes:insert({
+        service = service,
+        paths = { "/" },
+      }))
+
+      assert(db.plugins:insert({
+        service = service,
+        name = "rpc-hello-test",
+        config = {},
+      }))
+
+      assert(mocked_cp:start())
+
+      assert(helpers.start_kong({
+        prefix = DP_PREFIX,
+        database = "off",
+        role = "data_plane",
+        cluster_mtls = "shared",
+        cluster_cert = "spec/fixtures/kong_clustering.crt",
+        cluster_cert_key = "spec/fixtures/kong_clustering.key",
+        nginx_conf = "spec/fixtures/custom_nginx.template",
+        plugins = "bundled,rpc-hello-test",
+        cluster_rpc = "on",
+        cluster_rpc_sync = "on",
+        log_level = "debug",
+        cluster_control_plane = "127.0.0.1:8005",
+      }))
+
+      node_id = get_node_id(DP_PREFIX)
+      mocked_cp:wait_for_node(node_id)
+    end)
+
+    lazy_teardown(function()
+      mocked_cp:stop(true)
+      helpers.stop_kong(DP_PREFIX, true)
+    end)
+
+    it("interception", function()
+      local body
+      helpers.pwait_until(function()
+        local proxy_client = assert(helpers.proxy_client())
+
+        body = assert.res_status(200, proxy_client:send {
+          method = "GET",
+          path = "/",
+          headers = {
+            ["x-greeting"] = "world",
+          }
+        })
+      end, 10)
+
+      assert.equal("hello world", body)
+
+      -- wait for the "kong.sync.v2.get_delta" call and get the record
+      local record = mocked_cp:wait_for_a_call(function(call)
+        return call.method == "kong.test.hello"
+      end)
+
+      -- ensure the content of the call is correct
+      assert.same({
+        method = 'kong.test.hello',
+        node_id = node_id,
+        proxy_id = 'control_plane',
+        request = 'world',
+        response = {
+          result = 'hello world',
+        },
+      }, record)
+    end)
+
+    it("mock", function()
+      finally(function()
+        mocked_cp:unmock("kong.test.hello")
+      end)
+      local called = false
+      mocked_cp:mock("kong.test.hello", function(node_id, payload)
+        called = true
+        return "goodbye " .. payload
+      end)
+
+      local body
+      helpers.pwait_until(function()
+        local proxy_client = assert(helpers.proxy_client())
+
+        body = assert.res_status(200, proxy_client:send {
+          method = "GET",
+          path = "/",
+          headers = {
+            ["x-greeting"] = "world",
+          }
+        })
+      end, 10)
+
+      assert.equal("goodbye world", body)
+      assert.truthy(called)
+    end)
+
+    it("call", function()
+      local res, err = mocked_cp:call(node_id, "kong.test.hello", "world")
+      assert.is_nil(err)
+      assert.equal("hello world", res)
+
+      local res, err = mocked_cp:call(node_id, "kong.test.unknown", "world")
+      assert.is_string(err)
+      assert.is_nil(res)
+    end)
+
+    it("prehook/posthook", function()
+      local prehook_called = false
+      mocked_cp:prehook("kong.test.hello", function(node_id, payload)
+        prehook_called = true
+        return node_id .. "'s " .. payload
+      end)
+
+      local body
+      helpers.pwait_until(function()
+        local proxy_client = assert(helpers.proxy_client())
+
+        body = assert.res_status(200, proxy_client:send {
+          method = "GET",
+          path = "/",
+          headers = {
+            ["x-greeting"] = "world",
+          }
+        })
+      end, 10)
+
+      assert.equal("hello " .. node_id .. "'s world", body)
+      assert.truthy(prehook_called)
+
+      prehook_called = false
+      local posthook_called = false
+      mocked_cp:posthook("kong.test.hello", function(node_id, payload)
+        posthook_called = true
+        return "Server: " .. payload.result
+      end)
+
+      local proxy_client = assert(helpers.proxy_client())
+
+      body = assert.res_status(200, proxy_client:send {
+        method = "GET",
+        path = "/",
+        headers = {
+          ["x-greeting"] = "world",
+        }
+      })
+
+      assert.equal("Server: hello " .. node_id .. "'s world", body)
+      assert.truthy(prehook_called)
+      assert.truthy(posthook_called)
+    end)
+  end)
+
+  describe("DP side", function()
+    local mocked_dp
+    local called = false
+
+    lazy_setup(function()
+      helpers.get_db_utils()
+      assert(helpers.start_kong({
+        role = "control_plane",
+        cluster_mtls = "shared",
+        cluster_cert = "spec/fixtures/kong_clustering.crt",
+        cluster_cert_key = "spec/fixtures/kong_clustering.key",
+        plugins = "bundled,rpc-hello-test",
+        nginx_conf = "spec/fixtures/custom_nginx.template",
+        cluster_rpc = "on",
+        cluster_rpc_sync = "on",
+      }))
+
+      mocked_dp = assert(dp.new())
+
+      mocked_dp.callbacks:register("kong.test.hello", function(node_id, payload)
+        called = true
+        return "goodbye " .. payload
+      end)
+
+      mocked_dp:start()
+      mocked_dp:wait_until_connected()
+    end)
+
+    lazy_teardown(function()
+      helpers.stop_kong()
+      mocked_dp:stop()
+    end)
+
+    it("rpc call", function()
+      local res, err = mocked_dp:call("control_plane", "kong.test.hello", "world")
+      assert.is_nil(err)
+      assert.equal("hello world", res)
+
+      local res, err = mocked_dp:call("control_plane", "kong.sync.v2.unknown", { default = {},})
+      assert.is_string(err)
+      assert.is_nil(res)
+    end)
+
+    it("get called", function()
+      local admin_client = helpers.admin_client()
+      local node_id = mocked_dp.node_id
+
+      local res = assert.res_status(200, admin_client:send {
+        method = "GET",
+        path = "/rpc-hello-test",
+        headers = {
+          ["x-greeting"] = "world",
+          ["x-node-id"] = node_id,
+        },
+      })
+
+      assert.equal("goodbye world", res)
+      assert.truthy(called)
+    end)
+  end)
+end)