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// SPDX-License-Identifier: GPL-3.0-or-later
package dockerd
import (
"context"
"sort"
"sync"
"testing"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/discovery/sd/model"
"github.com/docker/docker/api/types"
typesContainer "github.com/docker/docker/api/types/container"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
type dockerCli interface {
addContainer(cntr types.Container)
removeContainer(id string)
}
type discoverySim struct {
dockerCli func(cli dockerCli, interval time.Duration)
wantGroups []model.TargetGroup
}
func (sim *discoverySim) run(t *testing.T) {
d, err := NewDiscoverer(Config{
Source: "",
Tags: "docker",
})
require.NoError(t, err)
mock := newMockDockerd()
d.newDockerClient = func(addr string) (dockerClient, error) {
return mock, nil
}
d.listInterval = time.Millisecond * 100
seen := make(map[string]model.TargetGroup)
ctx, cancel := context.WithCancel(context.Background())
in := make(chan []model.TargetGroup)
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
d.Discover(ctx, in)
}()
wg.Add(1)
go func() {
defer wg.Done()
for {
select {
case <-ctx.Done():
return
case tggs := <-in:
for _, tgg := range tggs {
seen[tgg.Source()] = tgg
}
}
}
}()
done := make(chan struct{})
go func() {
defer close(done)
wg.Wait()
}()
select {
case <-d.started:
case <-time.After(time.Second * 3):
require.Fail(t, "discovery failed to start")
}
sim.dockerCli(mock, d.listInterval)
time.Sleep(time.Second)
cancel()
select {
case <-done:
case <-time.After(time.Second * 3):
require.Fail(t, "discovery hasn't finished after cancel")
}
var tggs []model.TargetGroup
for _, tgg := range seen {
tggs = append(tggs, tgg)
}
sortTargetGroups(tggs)
sortTargetGroups(sim.wantGroups)
wantLen, gotLen := len(sim.wantGroups), len(tggs)
assert.Equalf(t, wantLen, gotLen, "different len (want %d got %d)", wantLen, gotLen)
assert.Equal(t, sim.wantGroups, tggs)
assert.True(t, mock.negApiVerCalled, "NegotiateAPIVersion called")
assert.True(t, mock.closeCalled, "Close called")
}
func newMockDockerd() *mockDockerd {
return &mockDockerd{
containers: make(map[string]types.Container),
}
}
type mockDockerd struct {
negApiVerCalled bool
closeCalled bool
mux sync.Mutex
containers map[string]types.Container
}
func (m *mockDockerd) addContainer(cntr types.Container) {
m.mux.Lock()
defer m.mux.Unlock()
m.containers[cntr.ID] = cntr
}
func (m *mockDockerd) removeContainer(id string) {
m.mux.Lock()
defer m.mux.Unlock()
delete(m.containers, id)
}
func (m *mockDockerd) ContainerList(_ context.Context, _ typesContainer.ListOptions) ([]types.Container, error) {
m.mux.Lock()
defer m.mux.Unlock()
var cntrs []types.Container
for _, cntr := range m.containers {
cntrs = append(cntrs, cntr)
}
return cntrs, nil
}
func (m *mockDockerd) NegotiateAPIVersion(_ context.Context) {
m.negApiVerCalled = true
}
func (m *mockDockerd) Close() error {
m.closeCalled = true
return nil
}
func sortTargetGroups(tggs []model.TargetGroup) {
if len(tggs) == 0 {
return
}
sort.Slice(tggs, func(i, j int) bool { return tggs[i].Source() < tggs[j].Source() })
}
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