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metric_map_test.go
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metric_map_test.go
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package gostatsd
import (
"sort"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func metricsFixtures() []*Metric {
ms := []*Metric{
{Name: "foo.bar.baz", Value: 2, Type: COUNTER, Timestamp: 10},
{Name: "abc.def.g", Value: 3, Type: GAUGE, Timestamp: 10},
{Name: "abc.def.g", Value: 8, Type: GAUGE, Tags: Tags{"foo:bar", "baz"}, Timestamp: 10},
{Name: "def.g", Value: 10, Type: TIMER, Timestamp: 10},
{Name: "def.g", Value: 1, Type: TIMER, Tags: Tags{"foo:bar", "baz"}, Timestamp: 10},
{Name: "smp.rte", Value: 50, Type: COUNTER, Timestamp: 10},
{Name: "smp.rte", Value: 50, Type: COUNTER, Tags: Tags{"foo:bar", "baz"}, Timestamp: 10},
{Name: "smp.rte", Value: 5, Type: COUNTER, Tags: Tags{"foo:bar", "baz"}, Timestamp: 10},
{Name: "uniq.usr", StringValue: "joe", Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "joe", Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "bob", Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "john", Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "john", Type: SET, Tags: Tags{"foo:bar", "baz"}, Timestamp: 10},
{Name: "timer_sampling", Value: 10, Type: TIMER, Rate: 0.1, Timestamp: 10},
{Name: "timer_sampling", Value: 30, Type: TIMER, Rate: 0.1, Timestamp: 10},
{Name: "timer_sampling", Value: 50, Type: TIMER, Rate: 0.1, Timestamp: 10},
{Name: "counter_sampling", Value: 2, Type: COUNTER, Rate: 0.25, Timestamp: 10},
{Name: "counter_sampling", Value: 5, Type: COUNTER, Rate: 0.25, Timestamp: 10},
}
for i, m := range ms {
if ms[i].Rate == 0.0 {
ms[i].Rate = 1.0
}
ms[i].TagsKey = m.FormatTagsKey()
}
return ms
}
func TestReceive(t *testing.T) {
t.Parallel()
assrt := assert.New(t)
mm := NewMetricMap()
tests := metricsFixtures()
for _, metric := range tests {
mm.Receive(metric)
}
expectedCounters := Counters{
"foo.bar.baz": map[string]Counter{
"": {Value: 2, Timestamp: 10},
},
"smp.rte": map[string]Counter{
"": {Value: 50, Timestamp: 10},
"baz,foo:bar": {Value: 55, Timestamp: 10, Tags: Tags{"baz", "foo:bar"}},
},
"counter_sampling": map[string]Counter{
"": {Value: 28, Timestamp: 10},
},
}
assrt.Equal(expectedCounters, mm.Counters)
expectedGauges := Gauges{
"abc.def.g": map[string]Gauge{
"": {Value: 3, Timestamp: 10},
"baz,foo:bar": {Value: 8, Timestamp: 10, Tags: Tags{"baz", "foo:bar"}},
},
}
assrt.Equal(expectedGauges, mm.Gauges)
expectedTimers := Timers{
"def.g": map[string]Timer{
"": {Values: []float64{10}, Timestamp: 10, SampledCount: 1},
"baz,foo:bar": {Values: []float64{1}, Timestamp: 10, SampledCount: 1, Tags: Tags{"baz", "foo:bar"}},
},
"timer_sampling": map[string]Timer{
"": {Values: []float64{10, 30, 50}, Timestamp: 10, SampledCount: 30},
},
}
assrt.Equal(expectedTimers, mm.Timers)
expectedSets := Sets{
"uniq.usr": map[string]Set{
"": {
Values: map[string]struct{}{
"joe": {},
"bob": {},
"john": {},
},
Timestamp: 10,
},
"baz,foo:bar": {
Values: map[string]struct{}{
"john": {},
},
Timestamp: 10,
Tags: Tags{"baz", "foo:bar"},
},
},
}
assrt.Equal(expectedSets, mm.Sets)
}
func benchmarkReceive(metric Metric, b *testing.B) {
ma := NewMetricMap()
b.ReportAllocs()
b.ResetTimer()
for n := 0; n < b.N; n++ {
ma.Receive(&metric)
}
}
func BenchmarkReceiveCounter(b *testing.B) {
benchmarkReceive(Metric{Name: "foo.bar.baz", Value: 2, Type: COUNTER}, b)
}
func BenchmarkReceiveGauge(b *testing.B) {
benchmarkReceive(Metric{Name: "abc.def.g", Value: 3, Type: GAUGE}, b)
}
func BenchmarkReceiveTimer(b *testing.B) {
benchmarkReceive(Metric{Name: "def.g", Value: 10, Type: TIMER}, b)
}
func BenchmarkReceiveSet(b *testing.B) {
benchmarkReceive(Metric{Name: "uniq.usr", StringValue: "joe", Type: SET}, b)
}
func BenchmarkReceives(b *testing.B) {
ma := NewMetricMap()
tests := metricsFixtures()
b.ReportAllocs()
b.ResetTimer()
for n := 0; n < b.N; n++ {
for _, metric := range tests {
ma.Receive(metric)
}
}
}
func TestMetricMapDispatch(t *testing.T) {
mm := NewMetricMap()
metrics := metricsFixtures()
for _, metric := range metrics {
mm.Receive(metric)
}
actual := mm.AsMetrics()
expected := []*Metric{
{Name: "abc.def.g", Value: 3, Rate: 1, Type: GAUGE, Timestamp: 10},
{Name: "abc.def.g", Value: 8, Rate: 1, TagsKey: "baz,foo:bar", Tags: Tags{"baz", "foo:bar"}, Type: GAUGE, Timestamp: 10},
{Name: "counter_sampling", Value: (2 + 5) / 0.25, Rate: 1, Type: COUNTER, Timestamp: 10},
{Name: "def.g", Value: 10, Rate: 1, Type: TIMER, Timestamp: 10},
{Name: "def.g", Value: 1, Rate: 1, TagsKey: "baz,foo:bar", Tags: Tags{"baz", "foo:bar"}, Type: TIMER, Timestamp: 10},
{Name: "foo.bar.baz", Value: 2, Rate: 1, Type: COUNTER, Timestamp: 10},
{Name: "smp.rte", Value: 50, Rate: 1, Type: COUNTER, Timestamp: 10},
{Name: "smp.rte", Value: 50 + 5, Rate: 1, TagsKey: "baz,foo:bar", Tags: Tags{"baz", "foo:bar"}, Type: COUNTER, Timestamp: 10},
{Name: "timer_sampling", Value: 10, Rate: 0.1, Type: TIMER, Timestamp: 10},
{Name: "timer_sampling", Value: 30, Rate: 0.1, Type: TIMER, Timestamp: 10},
{Name: "timer_sampling", Value: 50, Rate: 0.1, Type: TIMER, Timestamp: 10},
{Name: "uniq.usr", StringValue: "bob", Rate: 1, Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "joe", Rate: 1, Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "john", Rate: 1, Type: SET, Timestamp: 10},
{Name: "uniq.usr", StringValue: "john", Rate: 1, TagsKey: "baz,foo:bar", Tags: Tags{"baz", "foo:bar"}, Type: SET, Timestamp: 10},
}
sort.Slice(actual, SortCompare(actual))
sort.Slice(expected, SortCompare(expected))
require.EqualValues(t, expected, actual)
}
// Copied from internal/fixtures because dependency loops
func SortCompare(ms []*Metric) func(i, j int) bool {
return func(i, j int) bool {
if ms[i].Name == ms[j].Name {
if len(ms[i].Tags) == len(ms[j].Tags) { // This is not exactly accurate, but close enough with our data
if ms[i].Type == SET {
return ms[i].StringValue < ms[j].StringValue
} else {
return ms[i].Value < ms[j].Value
}
}
return len(ms[i].Tags) < len(ms[j].Tags)
}
return ms[i].Name < ms[j].Name
}
}
func TestMetricMapMerge(t *testing.T) {
metrics1 := []*Metric{
{Name: "TestMetricMapMerge.counter", Value: 10, Rate: 1, Type: COUNTER, Timestamp: 10},
{Name: "TestMetricMapMerge.gauge", Value: 10, Type: GAUGE, Timestamp: 10},
{Name: "TestMetricMapMerge.timer", Value: 10, Rate: 1, Type: TIMER, Timestamp: 10},
{Name: "TestMetricMapMerge.timer", Value: 10, Rate: 0.1, Type: TIMER, Timestamp: 10},
{Name: "TestMetricMapMerge.set", StringValue: "abc", Type: SET, Timestamp: 10},
}
metrics2 := []*Metric{
{Name: "TestMetricMapMerge.counter", Value: 20, Rate: 0.1, Type: COUNTER, Timestamp: 20},
{Name: "TestMetricMapMerge.gauge", Value: 20, Type: GAUGE, Timestamp: 20},
{Name: "TestMetricMapMerge.timer", Value: 20, Rate: 1, Type: TIMER, Timestamp: 20},
{Name: "TestMetricMapMerge.timer", Value: 20, Rate: 0.1, Type: TIMER, Timestamp: 20},
{Name: "TestMetricMapMerge.set", StringValue: "def", Type: SET, Timestamp: 20},
}
m1 := NewMetricMap()
for _, m := range metrics1 {
m1.Receive(m)
}
m2 := NewMetricMap()
for _, m := range metrics2 {
m2.Receive(m)
}
merged := NewMetricMap()
merged.Merge(m1)
merged.Merge(m2)
expected := NewMetricMap()
expected.Counters = Counters{
"TestMetricMapMerge.counter": map[string]Counter{
"": {
Value: 10 + (20 / 0.1),
Timestamp: 20,
},
},
}
expected.Timers = Timers{
"TestMetricMapMerge.timer": map[string]Timer{
"": {
SampledCount: 1 + (1 / 0.1) + 1 + (1 / 0.1),
Values: []float64{10, 10, 20, 20},
Timestamp: 20,
},
},
}
expected.Gauges = Gauges{
"TestMetricMapMerge.gauge": map[string]Gauge{
"": {
Value: 20, // most recent value wins
Timestamp: 20,
},
},
}
expected.Sets = Sets{
"TestMetricMapMerge.set": map[string]Set{
"": {
Values: map[string]struct{}{"abc": {}, "def": {}},
Timestamp: 20,
},
},
}
require.Equal(t, expected.Counters, merged.Counters)
require.Equal(t, expected.Timers, merged.Timers)
require.Equal(t, expected.Gauges, merged.Gauges)
require.Equal(t, expected.Sets, merged.Sets)
}
func TestMetricMapSplit(t *testing.T) {
mmOriginal := NewMetricMap()
mmOriginal.Counters["m"] = map[string]Counter{
"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Value: 10},
"t.s.h2": {Tags: Tags{"t"}, Source: "h2", Value: 20},
"t.s.h3": {Tags: Tags{"t"}, Source: "h3", Value: 30},
"t.s.h4": {Tags: Tags{"t"}, Source: "h4", Value: 40},
"t.s.h5": {Tags: Tags{"t"}, Source: "h5", Value: 50},
}
mmOriginal.Gauges["m"] = map[string]Gauge{
"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Value: 10},
"t.s.h2": {Tags: Tags{"t"}, Source: "h2", Value: 20},
"t.s.h3": {Tags: Tags{"t"}, Source: "h3", Value: 30},
"t.s.h4": {Tags: Tags{"t"}, Source: "h4", Value: 40},
"t.s.h5": {Tags: Tags{"t"}, Source: "h5", Value: 50},
}
mmOriginal.Timers["m"] = map[string]Timer{
"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Values: []float64{10, 50}},
"t.s.h2": {Tags: Tags{"t"}, Source: "h2", Values: []float64{20, 40}},
"t.s.h3": {Tags: Tags{"t"}, Source: "h3", Values: []float64{30, 30}},
"t.s.h4": {Tags: Tags{"t"}, Source: "h4", Values: []float64{40, 20}},
"t.s.h5": {Tags: Tags{"t"}, Source: "h5", Values: []float64{50, 10}},
}
mmOriginal.Sets["m"] = map[string]Set{
"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Values: map[string]struct{}{"10": {}, "50": {}}},
"t.s.h2": {Tags: Tags{"t"}, Source: "h2", Values: map[string]struct{}{"20": {}, "40": {}}},
"t.s.h3": {Tags: Tags{"t"}, Source: "h3", Values: map[string]struct{}{"30": {}, "3.0": {}}},
"t.s.h4": {Tags: Tags{"t"}, Source: "h4", Values: map[string]struct{}{"40": {}, "20": {}}},
"t.s.h5": {Tags: Tags{"t"}, Source: "h5", Values: map[string]struct{}{"50": {}, "10": {}}},
}
mmMerged := NewMetricMap()
mms := mmOriginal.Split(2)
for _, mmSplit := range mms {
// Make sure something landed in each (don't use mmSplit.IsEmpty() to ensure that all types are split)
require.True(t, len(mmSplit.Counters) > 0)
require.True(t, len(mmSplit.Gauges) > 0)
require.True(t, len(mmSplit.Timers) > 0)
require.True(t, len(mmSplit.Sets) > 0)
mmMerged.Merge(mmSplit)
}
// Make sure when merge back they are the same
require.EqualValues(t, mmOriginal, mmMerged)
}
func TestMetricMapIsEmpty(t *testing.T) {
mm := NewMetricMap()
require.True(t, mm.IsEmpty())
// Counter
mm.Counters["m"] = map[string]Counter{"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Value: 10}}
require.False(t, mm.IsEmpty())
mm.Counters.Delete("m")
require.True(t, mm.IsEmpty())
// Gauge
mm.Gauges["m"] = map[string]Gauge{"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Value: 10}}
require.False(t, mm.IsEmpty())
mm.Gauges.Delete("m")
require.True(t, mm.IsEmpty())
// Timer
mm.Timers["m"] = map[string]Timer{"t.s.h1": {Tags: Tags{"t"}, Source: "h1", Values: []float64{10}}}
require.False(t, mm.IsEmpty())
mm.Timers.Delete("m")
require.True(t, mm.IsEmpty())
// Set
mm.Sets["m"] = map[string]Set{"t.s.h1": {Tags: Tags{"t"}, Source: "h5", Values: map[string]struct{}{"10": {}}}}
require.False(t, mm.IsEmpty())
mm.Sets.Delete("m")
require.True(t, mm.IsEmpty())
}
func TestTagsMatch(t *testing.T) {
tagsKey := "author:bob,env:dev,region:us-east-1,service:monitor,other:abc"
require.Equal(t, tagsMatch([]string{}, tagsKey), "")
require.Equal(t, tagsMatch([]string{"env"}, tagsKey), "env:dev")
require.Equal(t, tagsMatch([]string{"env", "service"}, tagsKey), "env:dev,service:monitor")
}
func TestMetricMapSplitByTags(t *testing.T) {
mmOriginal := NewMetricMap()
mmOriginal.Counters["m"] = map[string]Counter{
"t:x,s:h1": {Tags: Tags{"t:x"}, Source: "h1", Value: 10},
"t:x,s:h2": {Tags: Tags{"t:x"}, Source: "h2", Value: 20},
"t:x,v:1,s:h3": {Tags: Tags{"t:x", "v:1"}, Source: "h3", Value: 30},
"t:y,v:2,s:h4": {Tags: Tags{"t:y", "v:2"}, Source: "h4", Value: 40},
"t:y,x,s:h5": {Tags: Tags{"t:y", "x"}, Source: "h5", Value: 50},
}
mmOriginal.Gauges["m"] = map[string]Gauge{
"t:x,s:h1": {Tags: Tags{"t:x"}, Source: "h1", Value: 10},
"t:x,s:h2": {Tags: Tags{"t:x"}, Source: "h2", Value: 20},
"t:x,v:1,s:h3": {Tags: Tags{"t:x", "v:1"}, Source: "h3", Value: 30},
"t:y,v:2,s:h4": {Tags: Tags{"t:y", "v:2"}, Source: "h4", Value: 40},
"t:y,x,s:h5": {Tags: Tags{"t:y", "x"}, Source: "h5", Value: 50},
}
mmOriginal.Timers["m"] = map[string]Timer{
"t:x,s:h1": {Values: []float64{10, 50}, Tags: Tags{"t:x"}, Source: "h1"},
"t:x,s:h2": {Values: []float64{20, 40}, Tags: Tags{"t:x"}, Source: "h2"},
"t:x,v:1,s:h3": {Values: []float64{30, 30}, Tags: Tags{"t:x", "v:1"}, Source: "h3"},
"t:y,v:2,s:h4": {Values: []float64{40, 20}, Tags: Tags{"t:y", "v:2"}, Source: "h4"},
"t:y,x,s:h5": {Values: []float64{50, 10}, Tags: Tags{"t:y", "x"}, Source: "h5"},
}
mmOriginal.Sets["m"] = map[string]Set{
"t:x,s:h1": {Values: map[string]struct{}{"10": {}, "50": {}}, Tags: Tags{"t:x"}, Source: "h1"},
"t:x,s:h2": {Values: map[string]struct{}{"20": {}, "40": {}}, Tags: Tags{"t:x"}, Source: "h2"},
"t:x,v:1,s:h3": {Values: map[string]struct{}{"30": {}, "3.0": {}}, Tags: Tags{"t:x", "v:1"}, Source: "h3"},
"t:y,v:2,s:h4": {Values: map[string]struct{}{"40": {}, "20": {}}, Tags: Tags{"t:y", "v:2"}, Source: "h4"},
"t:y,x,s:h5": {Values: map[string]struct{}{"50": {}, "10": {}}, Tags: Tags{"t:y", "x"}, Source: "h5"},
}
// no-op if given empty tagNames
mms := mmOriginal.SplitByTags([]string{})
require.Equal(t, len(mms), 1)
// empty tag name doesn't match
mms = mmOriginal.SplitByTags([]string{""})
require.Equal(t, len(mms), 1)
// non existing tag name doesn't match
mms = mmOriginal.SplitByTags([]string{"key:"})
require.Equal(t, len(mms), 1)
// valueless tag doesn't match
mms = mmOriginal.SplitByTags([]string{"x:"})
require.Equal(t, len(mms), 1)
// each value of tag s is unique
mms = mmOriginal.SplitByTags([]string{"s:"})
require.Equal(t, len(mms), 5)
// two possible values for tag t
mms = mmOriginal.SplitByTags([]string{"t:"})
require.Equal(t, len(mms), 2)
// all value combinations of tag t and v
mms = mmOriginal.SplitByTags([]string{"t:", "v:"})
require.Equal(t, len(mms), 4)
}