mirror of https://github.com/coder/coder.git
243 lines
6.7 KiB
Go
243 lines
6.7 KiB
Go
package tailnet_test
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import (
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"net"
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"testing"
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"github.com/google/uuid"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/coder/coder/tailnet"
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"github.com/coder/coder/testutil"
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)
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func TestCoordinator(t *testing.T) {
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t.Parallel()
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t.Run("ClientWithoutAgent", func(t *testing.T) {
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t.Parallel()
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coordinator := tailnet.NewCoordinator()
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client, server := net.Pipe()
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sendNode, errChan := tailnet.ServeCoordinator(client, func(node []*tailnet.Node) error {
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return nil
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})
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id := uuid.New()
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closeChan := make(chan struct{})
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go func() {
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err := coordinator.ServeClient(server, id, uuid.New())
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assert.NoError(t, err)
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close(closeChan)
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}()
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sendNode(&tailnet.Node{})
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require.Eventually(t, func() bool {
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return coordinator.Node(id) != nil
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}, testutil.WaitShort, testutil.IntervalFast)
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require.NoError(t, client.Close())
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require.NoError(t, server.Close())
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<-errChan
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<-closeChan
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})
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t.Run("AgentWithoutClients", func(t *testing.T) {
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t.Parallel()
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coordinator := tailnet.NewCoordinator()
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client, server := net.Pipe()
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sendNode, errChan := tailnet.ServeCoordinator(client, func(node []*tailnet.Node) error {
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return nil
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})
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id := uuid.New()
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closeChan := make(chan struct{})
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go func() {
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err := coordinator.ServeAgent(server, id, "")
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assert.NoError(t, err)
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close(closeChan)
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}()
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sendNode(&tailnet.Node{})
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require.Eventually(t, func() bool {
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return coordinator.Node(id) != nil
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}, testutil.WaitShort, testutil.IntervalFast)
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err := client.Close()
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require.NoError(t, err)
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<-errChan
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<-closeChan
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})
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t.Run("AgentWithClient", func(t *testing.T) {
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t.Parallel()
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coordinator := tailnet.NewCoordinator()
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agentWS, agentServerWS := net.Pipe()
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defer agentWS.Close()
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agentNodeChan := make(chan []*tailnet.Node)
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sendAgentNode, agentErrChan := tailnet.ServeCoordinator(agentWS, func(nodes []*tailnet.Node) error {
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agentNodeChan <- nodes
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return nil
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})
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agentID := uuid.New()
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closeAgentChan := make(chan struct{})
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go func() {
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err := coordinator.ServeAgent(agentServerWS, agentID, "")
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assert.NoError(t, err)
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close(closeAgentChan)
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}()
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sendAgentNode(&tailnet.Node{})
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require.Eventually(t, func() bool {
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return coordinator.Node(agentID) != nil
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}, testutil.WaitShort, testutil.IntervalFast)
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clientWS, clientServerWS := net.Pipe()
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defer clientWS.Close()
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defer clientServerWS.Close()
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clientNodeChan := make(chan []*tailnet.Node)
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sendClientNode, clientErrChan := tailnet.ServeCoordinator(clientWS, func(nodes []*tailnet.Node) error {
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clientNodeChan <- nodes
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return nil
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})
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clientID := uuid.New()
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closeClientChan := make(chan struct{})
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go func() {
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err := coordinator.ServeClient(clientServerWS, clientID, agentID)
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assert.NoError(t, err)
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close(closeClientChan)
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}()
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agentNodes := <-clientNodeChan
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require.Len(t, agentNodes, 1)
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sendClientNode(&tailnet.Node{})
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clientNodes := <-agentNodeChan
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require.Len(t, clientNodes, 1)
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// Ensure an update to the agent node reaches the client!
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sendAgentNode(&tailnet.Node{})
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agentNodes = <-clientNodeChan
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require.Len(t, agentNodes, 1)
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// Close the agent WebSocket so a new one can connect.
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err := agentWS.Close()
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require.NoError(t, err)
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<-agentErrChan
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<-closeAgentChan
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// Create a new agent connection. This is to simulate a reconnect!
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agentWS, agentServerWS = net.Pipe()
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defer agentWS.Close()
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agentNodeChan = make(chan []*tailnet.Node)
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_, agentErrChan = tailnet.ServeCoordinator(agentWS, func(nodes []*tailnet.Node) error {
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agentNodeChan <- nodes
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return nil
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})
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closeAgentChan = make(chan struct{})
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go func() {
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err := coordinator.ServeAgent(agentServerWS, agentID, "")
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assert.NoError(t, err)
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close(closeAgentChan)
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}()
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// Ensure the existing listening client sends it's node immediately!
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clientNodes = <-agentNodeChan
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require.Len(t, clientNodes, 1)
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err = agentWS.Close()
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require.NoError(t, err)
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<-agentErrChan
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<-closeAgentChan
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err = clientWS.Close()
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require.NoError(t, err)
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<-clientErrChan
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<-closeClientChan
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})
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t.Run("AgentDoubleConnect", func(t *testing.T) {
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t.Parallel()
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coordinator := tailnet.NewCoordinator()
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agentWS1, agentServerWS1 := net.Pipe()
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defer agentWS1.Close()
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agentNodeChan1 := make(chan []*tailnet.Node)
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sendAgentNode1, agentErrChan1 := tailnet.ServeCoordinator(agentWS1, func(nodes []*tailnet.Node) error {
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agentNodeChan1 <- nodes
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return nil
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})
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agentID := uuid.New()
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closeAgentChan1 := make(chan struct{})
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go func() {
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err := coordinator.ServeAgent(agentServerWS1, agentID, "")
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assert.NoError(t, err)
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close(closeAgentChan1)
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}()
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sendAgentNode1(&tailnet.Node{})
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require.Eventually(t, func() bool {
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return coordinator.Node(agentID) != nil
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}, testutil.WaitShort, testutil.IntervalFast)
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clientWS, clientServerWS := net.Pipe()
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defer clientWS.Close()
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defer clientServerWS.Close()
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clientNodeChan := make(chan []*tailnet.Node)
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sendClientNode, clientErrChan := tailnet.ServeCoordinator(clientWS, func(nodes []*tailnet.Node) error {
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clientNodeChan <- nodes
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return nil
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})
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clientID := uuid.New()
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closeClientChan := make(chan struct{})
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go func() {
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err := coordinator.ServeClient(clientServerWS, clientID, agentID)
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assert.NoError(t, err)
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close(closeClientChan)
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}()
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agentNodes := <-clientNodeChan
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require.Len(t, agentNodes, 1)
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sendClientNode(&tailnet.Node{})
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clientNodes := <-agentNodeChan1
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require.Len(t, clientNodes, 1)
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// Ensure an update to the agent node reaches the client!
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sendAgentNode1(&tailnet.Node{})
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agentNodes = <-clientNodeChan
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require.Len(t, agentNodes, 1)
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// Create a new agent connection without disconnecting the old one.
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agentWS2, agentServerWS2 := net.Pipe()
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defer agentWS2.Close()
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agentNodeChan2 := make(chan []*tailnet.Node)
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_, agentErrChan2 := tailnet.ServeCoordinator(agentWS2, func(nodes []*tailnet.Node) error {
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agentNodeChan2 <- nodes
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return nil
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})
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closeAgentChan2 := make(chan struct{})
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go func() {
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err := coordinator.ServeAgent(agentServerWS2, agentID, "")
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assert.NoError(t, err)
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close(closeAgentChan2)
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}()
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// Ensure the existing listening client sends it's node immediately!
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clientNodes = <-agentNodeChan2
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require.Len(t, clientNodes, 1)
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counts, ok := coordinator.(interface {
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NodeCount() int
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AgentCount() int
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})
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if !ok {
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t.Fatal("coordinator should have NodeCount() and AgentCount()")
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}
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assert.Equal(t, 2, counts.NodeCount())
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assert.Equal(t, 1, counts.AgentCount())
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err := agentWS2.Close()
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require.NoError(t, err)
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<-agentErrChan2
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<-closeAgentChan2
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err = clientWS.Close()
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require.NoError(t, err)
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<-clientErrChan
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<-closeClientChan
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// This original agent websocket should've been closed forcefully.
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<-agentErrChan1
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<-closeAgentChan1
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})
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}
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