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Use new, struct-based
ex_dtls; add tests (#17)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| defmodule ExWebRTC.DTLSTransportTest do | ||
| use ExUnit.Case, async: true | ||
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| alias ExWebRTC.DTLSTransport | ||
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| defmodule FakeICEAgent do | ||
| use GenServer | ||
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| def start_link(_mode, config) do | ||
| GenServer.start_link(__MODULE__, {self(), config}) | ||
| end | ||
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| def send_data(ice_agent, data) do | ||
| GenServer.cast(ice_agent, {:send_data, data}) | ||
| end | ||
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| def send_dtls(ice_agent, data) do | ||
| GenServer.cast(ice_agent, {:send_dtls, data}) | ||
| end | ||
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| @impl true | ||
| def init({dtls, tester: tester}), | ||
| do: {:ok, %{dtls: dtls, tester: tester}} | ||
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| @impl true | ||
| def handle_cast({:send_data, data}, state) do | ||
| send(state.tester, {:fake_ice, data}) | ||
| {:noreply, state} | ||
| end | ||
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| @impl true | ||
| def handle_cast({:send_dtls, data}, state) do | ||
| send(state.dtls, {:ex_ice, self(), data}) | ||
| {:noreply, state} | ||
| end | ||
| end | ||
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| setup do | ||
| assert {:ok, dtls} = DTLSTransport.start_link([tester: self()], FakeICEAgent) | ||
| ice = DTLSTransport.get_ice_agent(dtls) | ||
| assert is_pid(ice) | ||
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| %{dtls: dtls, ice: ice} | ||
| end | ||
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| test "forwards non-data ICE messages", %{ice: ice} do | ||
| message = :connected | ||
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| FakeICEAgent.send_dtls(ice, message) | ||
| assert_receive {:ex_ice, _from, ^message} | ||
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| FakeICEAgent.send_dtls(ice, {:data, <<1, 2, 3>>}) | ||
| refute_receive {:ex_ice, _from, _msg} | ||
| end | ||
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| test "cannot send data when handshake not finished", %{dtls: dtls} do | ||
| DTLSTransport.send_data(dtls, <<1, 2, 3>>) | ||
|
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| refute_receive {:fake_ice, _data} | ||
| end | ||
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| test "cannot start dtls more than once", %{dtls: dtls} do | ||
| assert :ok = DTLSTransport.start_dtls(dtls, :passive) | ||
| assert {:error, :already_started} = DTLSTransport.start_dtls(dtls, :passive) | ||
| end | ||
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| test "initiates DTLS handshake when in active mode", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :active) | ||
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| FakeICEAgent.send_dtls(ice, :connected) | ||
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| assert_receive {:fake_ice, packets} | ||
| assert is_binary(packets) | ||
| end | ||
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| test "won't initiate DTLS handshake when in passive mode", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :passive) | ||
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| FakeICEAgent.send_dtls(ice, :connected) | ||
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| refute_receive({:fake_ice, _msg}) | ||
| end | ||
|
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| test "will retransmit after initiating handshake", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :active) | ||
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| FakeICEAgent.send_dtls(ice, :connected) | ||
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| assert_receive {:fake_ice, _packets} | ||
| assert_receive {:fake_ice, _retransmited}, 1100 | ||
| end | ||
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| test "will buffer packets and send when connected", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :passive) | ||
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| remote_dtls = ExDTLS.init(client_mode: true, dtls_srtp: true) | ||
| {packets, _timeout} = ExDTLS.do_handshake(remote_dtls) | ||
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| FakeICEAgent.send_dtls(ice, {:data, packets}) | ||
| refute_receive {:fake_ice, _packets} | ||
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| FakeICEAgent.send_dtls(ice, :connected) | ||
| assert_receive {:fake_ice, packets} | ||
| assert is_binary(packets) | ||
| end | ||
|
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| test "finishes handshake in active mode", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :active) | ||
| remote_dtls = ExDTLS.init(client_mode: false, dtls_srtp: true) | ||
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| FakeICEAgent.send_dtls(ice, :connected) | ||
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| assert :ok = check_handshake(dtls, ice, remote_dtls) | ||
| end | ||
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| test "finishes handshake in passive mode", %{dtls: dtls, ice: ice} do | ||
| :ok = DTLSTransport.start_dtls(dtls, :passive) | ||
| FakeICEAgent.send_dtls(ice, :connected) | ||
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| remote_dtls = ExDTLS.init(client_mode: true, dtls_srtp: true) | ||
| {packets, _timeout} = ExDTLS.do_handshake(remote_dtls) | ||
| FakeICEAgent.send_dtls(ice, {:data, packets}) | ||
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| assert :ok == check_handshake(dtls, ice, remote_dtls) | ||
| end | ||
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| defp check_handshake(dtls, ice, remote_dtls) do | ||
| assert_receive {:fake_ice, packets} | ||
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| case ExDTLS.handle_data(remote_dtls, packets) do | ||
| {:handshake_packets, packets, _timeout} -> | ||
| FakeICEAgent.send_dtls(ice, {:data, packets}) | ||
| check_handshake(dtls, ice, remote_dtls) | ||
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| {:handshake_finished, _, _, _, packets} -> | ||
| FakeICEAgent.send_dtls(ice, {:data, packets}) | ||
| :ok | ||
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| {:handshake_finished, _, _, _} -> | ||
| :ok | ||
| end | ||
| end | ||
| end |
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