open-consul/agent/consul/usagemetrics/usagemetrics_test.go

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package usagemetrics
import (
"testing"
"time"
"github.com/armon/go-metrics"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
"github.com/hashicorp/consul/agent/consul/state"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/sdk/testutil"
)
type mockStateProvider struct {
mock.Mock
}
func (m *mockStateProvider) State() *state.Store {
retValues := m.Called()
return retValues.Get(0).(*state.Store)
}
func TestUsageReporter_Run_Nodes(t *testing.T) {
type testCase struct {
modfiyStateStore func(t *testing.T, s *state.Store)
expectedGauges map[string]metrics.GaugeValue
}
cases := map[string]testCase{
"empty-state": {
expectedGauges: map[string]metrics.GaugeValue{
"consul.usage.test.consul.state.nodes;datacenter=dc1": {
Name: "consul.usage.test.consul.state.nodes",
Value: 0,
Labels: []metrics.Label{{Name: "datacenter", Value: "dc1"}},
},
},
},
"nodes": {
modfiyStateStore: func(t *testing.T, s *state.Store) {
require.Nil(t, s.EnsureNode(1, &structs.Node{Node: "foo", Address: "127.0.0.1"}))
require.Nil(t, s.EnsureNode(2, &structs.Node{Node: "bar", Address: "127.0.0.2"}))
require.Nil(t, s.EnsureNode(3, &structs.Node{Node: "baz", Address: "127.0.0.2"}))
},
expectedGauges: map[string]metrics.GaugeValue{
"consul.usage.test.consul.state.nodes;datacenter=dc1": {
Name: "consul.usage.test.consul.state.nodes",
Value: 3,
Labels: []metrics.Label{{Name: "datacenter", Value: "dc1"}},
},
},
},
}
for name, tcase := range cases {
t.Run(name, func(t *testing.T) {
// Only have a single interval for the test
sink := metrics.NewInmemSink(1*time.Minute, 1*time.Minute)
cfg := metrics.DefaultConfig("consul.usage.test")
cfg.EnableHostname = false
metrics.NewGlobal(cfg, sink)
mockStateProvider := &mockStateProvider{}
s, err := newStateStore()
require.NoError(t, err)
if tcase.modfiyStateStore != nil {
tcase.modfiyStateStore(t, s)
}
mockStateProvider.On("State").Return(s)
reporter, err := NewUsageMetricsReporter(
new(Config).
WithStateProvider(mockStateProvider).
WithLogger(testutil.Logger(t)).
WithDatacenter("dc1"),
)
require.NoError(t, err)
reporter.runOnce()
intervals := sink.Data()
require.Len(t, intervals, 1)
intv := intervals[0]
// Range over the expected values instead of just doing an Equal
// comparison on the maps because of different metrics emitted between
// OSS and Ent. The enterprise and OSS tests have a full equality
// comparison on the maps.
for key, expected := range tcase.expectedGauges {
require.Equal(t, expected, intv.Gauges[key])
}
})
}
}