623 lines
24 KiB
Elixir
623 lines
24 KiB
Elixir
Code.require_file("test_helper.exs", __DIR__)
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defmodule RegistryTest do
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use ExUnit.Case, async: true
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doctest Registry, except: [:moduledoc]
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setup config do
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keys = config[:keys] || :unique
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partitions = config[:partitions] || 1
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listeners = List.wrap(config[:listener])
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opts = [keys: keys, name: config.test, partitions: partitions, listeners: listeners]
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{:ok, _} = start_supervised({Registry, opts})
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{:ok, %{registry: config.test, partitions: partitions}}
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end
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for {describe, partitions} <- ["with 1 partition": 1, "with 8 partitions": 8] do
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describe "unique #{describe}" do
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@describetag keys: :unique, partitions: partitions
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test "starts configured number of partitions", %{registry: registry, partitions: partitions} do
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assert length(Supervisor.which_children(registry)) == partitions
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end
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test "counts 0 keys in an empty registry", %{registry: registry} do
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assert 0 == Registry.count(registry)
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end
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test "counts the number of keys in a registry", %{registry: registry} do
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{:ok, _} = Registry.register(registry, "hello", :value)
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{:ok, _} = Registry.register(registry, "world", :value)
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assert 2 == Registry.count(registry)
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end
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test "has unique registrations", %{registry: registry} do
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{:ok, pid} = Registry.register(registry, "hello", :value)
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assert is_pid(pid)
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assert Registry.keys(registry, self()) == ["hello"]
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assert {:error, {:already_registered, pid}} = Registry.register(registry, "hello", :value)
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assert pid == self()
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assert Registry.keys(registry, self()) == ["hello"]
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{:ok, pid} = Registry.register(registry, "world", :value)
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assert is_pid(pid)
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assert Registry.keys(registry, self()) |> Enum.sort() == ["hello", "world"]
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end
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test "has unique registrations across processes", %{registry: registry} do
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{_, task} = register_task(registry, "hello", :value)
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Process.link(Process.whereis(registry))
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assert {:error, {:already_registered, ^task}} =
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Registry.register(registry, "hello", :recent)
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assert Registry.keys(registry, self()) == []
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{:links, links} = Process.info(self(), :links)
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assert Process.whereis(registry) in links
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end
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test "has unique registrations even if partition is delayed", %{registry: registry} do
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{owner, task} = register_task(registry, "hello", :value)
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assert Registry.register(registry, "hello", :other) ==
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{:error, {:already_registered, task}}
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:sys.suspend(owner)
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kill_and_assert_down(task)
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Registry.register(registry, "hello", :other)
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assert Registry.lookup(registry, "hello") == [{self(), :other}]
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end
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test "supports match patterns", %{registry: registry} do
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value = {1, :atom, 1}
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{:ok, _} = Registry.register(registry, "hello", value)
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assert Registry.match(registry, "hello", {1, :_, :_}) == [{self(), value}]
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assert Registry.match(registry, "hello", {1.0, :_, :_}) == []
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assert Registry.match(registry, "hello", {:_, :atom, :_}) == [{self(), value}]
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assert Registry.match(registry, "hello", {:"$1", :_, :"$1"}) == [{self(), value}]
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assert Registry.match(registry, "hello", :_) == [{self(), value}]
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assert Registry.match(registry, :_, :_) == []
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value2 = %{a: "a", b: "b"}
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{:ok, _} = Registry.register(registry, "world", value2)
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assert Registry.match(registry, "world", %{b: "b"}) == [{self(), value2}]
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end
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test "supports guard conditions", %{registry: registry} do
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value = {1, :atom, 2}
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{:ok, _} = Registry.register(registry, "hello", value)
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assert Registry.match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 1}]) ==
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[{self(), value}]
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assert Registry.match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 2}]) == []
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assert Registry.match(registry, "hello", {:_, :"$1", :_}, [{:is_atom, :"$1"}]) ==
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[{self(), value}]
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end
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test "count_match supports match patterns", %{registry: registry} do
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value = {1, :atom, 1}
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{:ok, _} = Registry.register(registry, "hello", value)
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assert 1 == Registry.count_match(registry, "hello", {1, :_, :_})
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assert 0 == Registry.count_match(registry, "hello", {1.0, :_, :_})
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assert 1 == Registry.count_match(registry, "hello", {:_, :atom, :_})
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assert 1 == Registry.count_match(registry, "hello", {:"$1", :_, :"$1"})
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assert 1 == Registry.count_match(registry, "hello", :_)
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assert 0 == Registry.count_match(registry, :_, :_)
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value2 = %{a: "a", b: "b"}
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{:ok, _} = Registry.register(registry, "world", value2)
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assert 1 == Registry.count_match(registry, "world", %{b: "b"})
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end
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test "count_match supports guard conditions", %{registry: registry} do
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value = {1, :atom, 2}
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{:ok, _} = Registry.register(registry, "hello", value)
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assert 1 == Registry.count_match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 1}])
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assert 0 == Registry.count_match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 2}])
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assert 1 == Registry.count_match(registry, "hello", {:_, :"$1", :_}, [{:is_atom, :"$1"}])
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end
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test "unregister_match supports patterns", %{registry: registry} do
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value = {1, :atom, 1}
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{:ok, _} = Registry.register(registry, "hello", value)
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Registry.unregister_match(registry, "hello", {2, :_, :_})
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assert Registry.lookup(registry, "hello") == [{self(), value}]
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Registry.unregister_match(registry, "hello", {1.0, :_, :_})
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assert Registry.lookup(registry, "hello") == [{self(), value}]
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Registry.unregister_match(registry, "hello", {:_, :atom, :_})
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assert Registry.lookup(registry, "hello") == []
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end
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test "unregister_match supports guards", %{registry: registry} do
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value = {1, :atom, 1}
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{:ok, _} = Registry.register(registry, "hello", value)
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Registry.unregister_match(registry, "hello", {:"$1", :_, :_}, [{:<, :"$1", 2}])
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assert Registry.lookup(registry, "hello") == []
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end
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test "unregister_match supports tricky keys", %{registry: registry} do
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{:ok, _} = Registry.register(registry, :_, :foo)
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{:ok, _} = Registry.register(registry, "hello", "b")
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Registry.unregister_match(registry, :_, :foo)
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assert Registry.lookup(registry, :_) == []
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assert Registry.keys(registry, self()) |> Enum.sort() == ["hello"]
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end
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test "compares using ===", %{registry: registry} do
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{:ok, _} = Registry.register(registry, 1.0, :value)
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{:ok, _} = Registry.register(registry, 1, :value)
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assert Registry.keys(registry, self()) |> Enum.sort() == [1, 1.0]
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end
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test "updates current process value", %{registry: registry} do
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assert Registry.update_value(registry, "hello", &raise/1) == :error
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register_task(registry, "hello", :value)
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assert Registry.update_value(registry, "hello", &raise/1) == :error
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Registry.register(registry, "world", 1)
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assert Registry.lookup(registry, "world") == [{self(), 1}]
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assert Registry.update_value(registry, "world", &(&1 + 1)) == {2, 1}
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assert Registry.lookup(registry, "world") == [{self(), 2}]
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end
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test "dispatches to a single key", %{registry: registry} do
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fun = fn _ -> raise "will never be invoked" end
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assert Registry.dispatch(registry, "hello", fun) == :ok
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{:ok, _} = Registry.register(registry, "hello", :value)
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fun = fn [{pid, value}] -> send(pid, {:dispatch, value}) end
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assert Registry.dispatch(registry, "hello", fun)
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assert_received {:dispatch, :value}
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end
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test "allows process unregistering", %{registry: registry} do
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:ok = Registry.unregister(registry, "hello")
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{:ok, _} = Registry.register(registry, "hello", :value)
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{:ok, _} = Registry.register(registry, "world", :value)
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assert Registry.keys(registry, self()) |> Enum.sort() == ["hello", "world"]
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:ok = Registry.unregister(registry, "hello")
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assert Registry.keys(registry, self()) == ["world"]
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:ok = Registry.unregister(registry, "world")
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assert Registry.keys(registry, self()) == []
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end
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test "allows unregistering with no entries", %{registry: registry} do
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assert Registry.unregister(registry, "hello") == :ok
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end
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@tag listener: :"unique_listener_#{partitions}"
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test "allows listeners", %{registry: registry, listener: listener} do
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Process.register(self(), listener)
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{_, task} = register_task(registry, "hello", :world)
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assert_received {:register, ^registry, "hello", ^task, :world}
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self = self()
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{:ok, _} = Registry.register(registry, "world", :value)
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assert_received {:register, ^registry, "world", ^self, :value}
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:ok = Registry.unregister(registry, "world")
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assert_received {:unregister, ^registry, "world", ^self}
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end
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test "links and unlinks on register/unregister", %{registry: registry} do
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{:ok, pid} = Registry.register(registry, "hello", :value)
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{:links, links} = Process.info(self(), :links)
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assert pid in links
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{:ok, pid} = Registry.register(registry, "world", :value)
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{:links, links} = Process.info(self(), :links)
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assert pid in links
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:ok = Registry.unregister(registry, "hello")
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{:links, links} = Process.info(self(), :links)
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assert pid in links
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:ok = Registry.unregister(registry, "world")
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{:links, links} = Process.info(self(), :links)
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refute pid in links
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end
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test "raises on unknown registry name" do
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assert_raise ArgumentError, ~r/unknown registry/, fn ->
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Registry.register(:unknown, "hello", :value)
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end
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end
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test "via callbacks", %{registry: registry} do
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name = {:via, Registry, {registry, "hello"}}
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# register_name
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{:ok, pid} = Agent.start_link(fn -> 0 end, name: name)
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# send
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assert Agent.update(name, &(&1 + 1)) == :ok
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# whereis_name
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assert Agent.get(name, & &1) == 1
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# unregister_name
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assert {:error, _} = Agent.start(fn -> raise "oops" end)
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# errors
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assert {:error, {:already_started, ^pid}} = Agent.start(fn -> 0 end, name: name)
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end
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test "uses value provided in via", %{registry: registry} do
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name = {:via, Registry, {registry, "hello", :value}}
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{:ok, pid} = Agent.start_link(fn -> 0 end, name: name)
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assert Registry.lookup(registry, "hello") == [{pid, :value}]
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end
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end
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end
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for {describe, partitions} <- ["with 1 partition": 1, "with 8 partitions": 8] do
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describe "duplicate #{describe}" do
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@describetag keys: :duplicate, partitions: partitions
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test "starts configured number of partitions", %{registry: registry, partitions: partitions} do
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assert length(Supervisor.which_children(registry)) == partitions
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end
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test "counts 0 keys in an empty registry", %{registry: registry} do
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assert 0 == Registry.count(registry)
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end
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test "counts the number of keys in a registry", %{registry: registry} do
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{:ok, _} = Registry.register(registry, "hello", :value)
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{:ok, _} = Registry.register(registry, "hello", :value)
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assert 2 == Registry.count(registry)
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end
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test "has duplicate registrations", %{registry: registry} do
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{:ok, pid} = Registry.register(registry, "hello", :value)
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assert is_pid(pid)
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assert Registry.keys(registry, self()) == ["hello"]
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assert {:ok, pid} = Registry.register(registry, "hello", :value)
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assert is_pid(pid)
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assert Registry.keys(registry, self()) == ["hello", "hello"]
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{:ok, pid} = Registry.register(registry, "world", :value)
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assert is_pid(pid)
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assert Registry.keys(registry, self()) |> Enum.sort() == ["hello", "hello", "world"]
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end
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test "compares using matches", %{registry: registry} do
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{:ok, _} = Registry.register(registry, 1.0, :value)
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{:ok, _} = Registry.register(registry, 1, :value)
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assert Registry.keys(registry, self()) |> Enum.sort() == [1, 1.0]
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end
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test "dispatches to multiple keys in serial", %{registry: registry} do
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Process.flag(:trap_exit, true)
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parent = self()
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fun = fn _ -> raise "will never be invoked" end
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assert Registry.dispatch(registry, "hello", fun, parallel: false) == :ok
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{:ok, _} = Registry.register(registry, "hello", :value1)
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{:ok, _} = Registry.register(registry, "hello", :value2)
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{:ok, _} = Registry.register(registry, "world", :value3)
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fun = fn entries ->
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assert parent == self()
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for {pid, value} <- entries, do: send(pid, {:dispatch, value})
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end
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assert Registry.dispatch(registry, "hello", fun, parallel: false)
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assert_received {:dispatch, :value1}
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assert_received {:dispatch, :value2}
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refute_received {:dispatch, :value3}
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fun = fn entries ->
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assert parent == self()
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for {pid, value} <- entries, do: send(pid, {:dispatch, value})
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end
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assert Registry.dispatch(registry, "world", fun, parallel: false)
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refute_received {:dispatch, :value1}
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refute_received {:dispatch, :value2}
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assert_received {:dispatch, :value3}
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refute_received {:EXIT, _, _}
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end
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test "dispatches to multiple keys in parallel", context do
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%{registry: registry, partitions: partitions} = context
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Process.flag(:trap_exit, true)
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parent = self()
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fun = fn _ -> raise "will never be invoked" end
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assert Registry.dispatch(registry, "hello", fun, parallel: true) == :ok
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{:ok, _} = Registry.register(registry, "hello", :value1)
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{:ok, _} = Registry.register(registry, "hello", :value2)
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{:ok, _} = Registry.register(registry, "world", :value3)
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fun = fn entries ->
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if partitions == 8 do
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assert parent != self()
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else
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assert parent == self()
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end
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for {pid, value} <- entries, do: send(pid, {:dispatch, value})
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end
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assert Registry.dispatch(registry, "hello", fun, parallel: true)
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assert_received {:dispatch, :value1}
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assert_received {:dispatch, :value2}
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refute_received {:dispatch, :value3}
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fun = fn entries ->
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if partitions == 8 do
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assert parent != self()
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else
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assert parent == self()
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end
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for {pid, value} <- entries, do: send(pid, {:dispatch, value})
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end
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assert Registry.dispatch(registry, "world", fun, parallel: true)
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refute_received {:dispatch, :value1}
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refute_received {:dispatch, :value2}
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assert_received {:dispatch, :value3}
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refute_received {:EXIT, _, _}
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end
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test "allows process unregistering", %{registry: registry} do
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{:ok, _} = Registry.register(registry, "hello", :value)
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{:ok, _} = Registry.register(registry, "hello", :value)
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{:ok, _} = Registry.register(registry, "world", :value)
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assert Registry.keys(registry, self()) |> Enum.sort() == ["hello", "hello", "world"]
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:ok = Registry.unregister(registry, "hello")
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assert Registry.keys(registry, self()) == ["world"]
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:ok = Registry.unregister(registry, "world")
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assert Registry.keys(registry, self()) == []
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end
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test "allows unregistering with no entries", %{registry: registry} do
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assert Registry.unregister(registry, "hello") == :ok
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end
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test "supports match patterns", %{registry: registry} do
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value1 = {1, :atom, 1}
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value2 = {2, :atom, 2}
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{:ok, _} = Registry.register(registry, "hello", value1)
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{:ok, _} = Registry.register(registry, "hello", value2)
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assert Registry.match(registry, "hello", {1, :_, :_}) == [{self(), value1}]
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assert Registry.match(registry, "hello", {1.0, :_, :_}) == []
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assert Registry.match(registry, "hello", {:_, :atom, :_}) |> Enum.sort() ==
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[{self(), value1}, {self(), value2}]
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assert Registry.match(registry, "hello", {:"$1", :_, :"$1"}) |> Enum.sort() ==
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[{self(), value1}, {self(), value2}]
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assert Registry.match(registry, "hello", {2, :_, :_}) == [{self(), value2}]
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assert Registry.match(registry, "hello", {2.0, :_, :_}) == []
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end
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test "supports guards", %{registry: registry} do
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value1 = {1, :atom, 1}
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value2 = {2, :atom, 2}
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{:ok, _} = Registry.register(registry, "hello", value1)
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{:ok, _} = Registry.register(registry, "hello", value2)
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assert Registry.match(registry, "hello", {:"$1", :_, :_}, [{:<, :"$1", 2}]) ==
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[{self(), value1}]
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assert Registry.match(registry, "hello", {:"$1", :_, :_}, [{:>, :"$1", 3}]) == []
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assert Registry.match(registry, "hello", {:"$1", :_, :_}, [{:<, :"$1", 3}]) |> Enum.sort() ==
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[{self(), value1}, {self(), value2}]
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assert Registry.match(registry, "hello", {:_, :"$1", :_}, [{:is_atom, :"$1"}])
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|> Enum.sort() == [{self(), value1}, {self(), value2}]
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end
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test "count_match supports match patterns", %{registry: registry} do
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value = {1, :atom, 1}
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{:ok, _} = Registry.register(registry, "hello", value)
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assert 1 == Registry.count_match(registry, "hello", {1, :_, :_})
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assert 0 == Registry.count_match(registry, "hello", {1.0, :_, :_})
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assert 1 == Registry.count_match(registry, "hello", {:_, :atom, :_})
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assert 1 == Registry.count_match(registry, "hello", {:"$1", :_, :"$1"})
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assert 1 == Registry.count_match(registry, "hello", :_)
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assert 0 == Registry.count_match(registry, :_, :_)
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value2 = %{a: "a", b: "b"}
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{:ok, _} = Registry.register(registry, "world", value2)
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assert 1 == Registry.count_match(registry, "world", %{b: "b"})
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end
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test "count_match supports guard conditions", %{registry: registry} do
|
|
value = {1, :atom, 2}
|
|
{:ok, _} = Registry.register(registry, "hello", value)
|
|
|
|
assert 1 == Registry.count_match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 1}])
|
|
assert 0 == Registry.count_match(registry, "hello", {:_, :_, :"$1"}, [{:>, :"$1", 2}])
|
|
assert 1 == Registry.count_match(registry, "hello", {:_, :"$1", :_}, [{:is_atom, :"$1"}])
|
|
end
|
|
|
|
test "unregister_match supports patterns", %{registry: registry} do
|
|
value1 = {1, :atom, 1}
|
|
value2 = {2, :atom, 2}
|
|
|
|
{:ok, _} = Registry.register(registry, "hello", value1)
|
|
{:ok, _} = Registry.register(registry, "hello", value2)
|
|
|
|
Registry.unregister_match(registry, "hello", {2, :_, :_})
|
|
assert Registry.lookup(registry, "hello") == [{self(), value1}]
|
|
|
|
{:ok, _} = Registry.register(registry, "hello", value2)
|
|
Registry.unregister_match(registry, "hello", {2.0, :_, :_})
|
|
assert Registry.lookup(registry, "hello") == [{self(), value1}, {self(), value2}]
|
|
Registry.unregister_match(registry, "hello", {:_, :atom, :_})
|
|
assert Registry.lookup(registry, "hello") == []
|
|
end
|
|
|
|
test "unregister_match supports guards", %{registry: registry} do
|
|
value1 = {1, :atom, 1}
|
|
value2 = {2, :atom, 2}
|
|
|
|
{:ok, _} = Registry.register(registry, "hello", value1)
|
|
{:ok, _} = Registry.register(registry, "hello", value2)
|
|
|
|
Registry.unregister_match(registry, "hello", {:"$1", :_, :_}, [{:<, :"$1", 2}])
|
|
assert Registry.lookup(registry, "hello") == [{self(), value2}]
|
|
end
|
|
|
|
test "unregister_match supports tricky keys", %{registry: registry} do
|
|
{:ok, _} = Registry.register(registry, :_, :foo)
|
|
{:ok, _} = Registry.register(registry, :_, :bar)
|
|
{:ok, _} = Registry.register(registry, "hello", "a")
|
|
{:ok, _} = Registry.register(registry, "hello", "b")
|
|
|
|
Registry.unregister_match(registry, :_, :foo)
|
|
assert Registry.lookup(registry, :_) == [{self(), :bar}]
|
|
|
|
assert Registry.keys(registry, self()) |> Enum.sort() == [:_, "hello", "hello"]
|
|
end
|
|
|
|
@tag listener: :"duplicate_listener_#{partitions}"
|
|
test "allows listeners", %{registry: registry, listener: listener} do
|
|
Process.register(self(), listener)
|
|
{_, task} = register_task(registry, "hello", :world)
|
|
assert_received {:register, ^registry, "hello", ^task, :world}
|
|
|
|
self = self()
|
|
{:ok, _} = Registry.register(registry, "hello", :value)
|
|
assert_received {:register, ^registry, "hello", ^self, :value}
|
|
|
|
:ok = Registry.unregister(registry, "hello")
|
|
assert_received {:unregister, ^registry, "hello", ^self}
|
|
end
|
|
|
|
test "links and unlinks on register/unregister", %{registry: registry} do
|
|
{:ok, pid} = Registry.register(registry, "hello", :value)
|
|
{:links, links} = Process.info(self(), :links)
|
|
assert pid in links
|
|
|
|
{:ok, pid} = Registry.register(registry, "world", :value)
|
|
{:links, links} = Process.info(self(), :links)
|
|
assert pid in links
|
|
|
|
:ok = Registry.unregister(registry, "hello")
|
|
{:links, links} = Process.info(self(), :links)
|
|
assert pid in links
|
|
|
|
:ok = Registry.unregister(registry, "world")
|
|
{:links, links} = Process.info(self(), :links)
|
|
refute pid in links
|
|
end
|
|
|
|
test "raises on unknown registry name" do
|
|
assert_raise ArgumentError, ~r/unknown registry/, fn ->
|
|
Registry.register(:unknown, "hello", :value)
|
|
end
|
|
end
|
|
|
|
test "raises if attempt to be used on via", %{registry: registry} do
|
|
assert_raise ArgumentError, ":via is not supported for duplicate registries", fn ->
|
|
name = {:via, Registry, {registry, "hello"}}
|
|
Agent.start_link(fn -> 0 end, name: name)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
# Note: those tests relies on internals
|
|
for keys <- [:unique, :duplicate] do
|
|
describe "clean up #{keys} registry on process crash" do
|
|
@describetag keys: keys
|
|
|
|
@tag partitions: 8
|
|
test "with 8 partitions", %{registry: registry} do
|
|
{_, task1} = register_task(registry, "hello", :value)
|
|
{_, task2} = register_task(registry, "world", :value)
|
|
|
|
kill_and_assert_down(task1)
|
|
kill_and_assert_down(task2)
|
|
|
|
# pid might be in different partition to key so need to sync with all
|
|
# partitions before checking ETS tables are empty.
|
|
for i <- 0..7 do
|
|
[{_, _, {partition, _}}] = :ets.lookup(registry, i)
|
|
GenServer.call(partition, :sync)
|
|
end
|
|
|
|
for i <- 0..7 do
|
|
[{_, key, {_, pid}}] = :ets.lookup(registry, i)
|
|
assert :ets.tab2list(key) == []
|
|
assert :ets.tab2list(pid) == []
|
|
end
|
|
end
|
|
|
|
@tag partitions: 1
|
|
test "with 1 partition", %{registry: registry} do
|
|
{_, task1} = register_task(registry, "hello", :value)
|
|
{_, task2} = register_task(registry, "world", :value)
|
|
|
|
kill_and_assert_down(task1)
|
|
kill_and_assert_down(task2)
|
|
|
|
[{-1, {_, _, key, {partition, pid}, _}}] = :ets.lookup(registry, -1)
|
|
GenServer.call(partition, :sync)
|
|
assert :ets.tab2list(key) == []
|
|
assert :ets.tab2list(pid) == []
|
|
end
|
|
end
|
|
end
|
|
|
|
test "child_spec/1 uses :name as :id" do
|
|
assert %{id: :custom_name} = Registry.child_spec(name: :custom_name)
|
|
assert %{id: Registry} = Registry.child_spec([])
|
|
end
|
|
|
|
defp register_task(registry, key, value) do
|
|
parent = self()
|
|
|
|
{:ok, task} =
|
|
Task.start(fn ->
|
|
send(parent, Registry.register(registry, key, value))
|
|
Process.sleep(:infinity)
|
|
end)
|
|
|
|
assert_receive {:ok, owner}
|
|
{owner, task}
|
|
end
|
|
|
|
defp kill_and_assert_down(pid) do
|
|
ref = Process.monitor(pid)
|
|
Process.exit(pid, :kill)
|
|
assert_receive {:DOWN, ^ref, _, _, _}
|
|
end
|
|
end
|