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// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus
import (
"fmt"
"reflect"
"testing"
dto "github.com/prometheus/client_model/go"
)
func TestDelete(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
testDelete(t, vec)
}
func TestDeleteWithCollisions(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
testDelete(t, vec)
}
func TestDeleteWithConstraints(t *testing.T) {
vec := V2.NewGaugeVec(GaugeVecOpts{
GaugeOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "l1"},
{Name: "l2", Constraint: func(s string) string { return "x" + s }},
},
})
testDelete(t, vec)
}
func testDelete(t *testing.T, vec *GaugeVec) {
if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
vec.With(Labels{"l1": "v1", "l2": "v2"}).Set(42)
if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), true; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
vec.With(Labels{"l1": "v1", "l2": "v2"}).Set(42)
if got, want := vec.Delete(Labels{"l2": "v2", "l1": "v1"}), true; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.Delete(Labels{"l2": "v2", "l1": "v1"}), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
vec.With(Labels{"l1": "v1", "l2": "v2"}).Set(42)
if got, want := vec.Delete(Labels{"l2": "v1", "l1": "v2"}), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.Delete(Labels{"l1": "v1"}), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
}
func TestDeleteLabelValues(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
testDeleteLabelValues(t, vec)
}
func TestDeleteLabelValuesWithCollisions(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
testDeleteLabelValues(t, vec)
}
func TestDeleteLabelValuesWithConstraints(t *testing.T) {
vec := V2.NewGaugeVec(GaugeVecOpts{
GaugeOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "l1"},
{Name: "l2", Constraint: func(s string) string { return "x" + s }},
},
})
testDeleteLabelValues(t, vec)
}
func testDeleteLabelValues(t *testing.T, vec *GaugeVec) {
if got, want := vec.DeleteLabelValues("v1", "v2"), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
vec.With(Labels{"l1": "v1", "l2": "v2"}).Set(42)
vec.With(Labels{"l1": "v1", "l2": "v3"}).Set(42) // Add junk data for collision.
if got, want := vec.DeleteLabelValues("v1", "v2"), true; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.DeleteLabelValues("v1", "v2"), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.DeleteLabelValues("v1", "v3"), true; got != want {
t.Errorf("got %v, want %v", got, want)
}
vec.With(Labels{"l1": "v1", "l2": "v2"}).Set(42)
// Delete out of order.
if got, want := vec.DeleteLabelValues("v2", "v1"), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
if got, want := vec.DeleteLabelValues("v1"), false; got != want {
t.Errorf("got %v, want %v", got, want)
}
}
func TestDeletePartialMatch(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2", "l3"},
)
testDeletePartialMatch(t, vec)
}
func TestDeletePartialMatchWithConstraints(t *testing.T) {
vec := V2.NewGaugeVec(GaugeVecOpts{
GaugeOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "l1"},
{Name: "l2", Constraint: func(s string) string { return "x" + s }},
{Name: "l3"},
},
})
testDeletePartialMatch(t, vec)
}
func testDeletePartialMatch(t *testing.T, baseVec *GaugeVec) {
assertNoMetric := func(t *testing.T) {
if n := len(baseVec.metricMap.metrics); n != 0 {
t.Error("expected no metrics, got", n)
}
}
// No metric value is set.
if got, want := baseVec.DeletePartialMatch(Labels{"l1": "v1", "l2": "v2"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
baseVec.With(Labels{"l1": "baseValue1", "l2": "baseValue2", "l3": "baseValue3"}).Inc()
baseVec.With(Labels{"l1": "multiDeleteV1", "l2": "diff1BaseValue2", "l3": "v3"}).Set(42)
baseVec.With(Labels{"l1": "multiDeleteV1", "l2": "diff2BaseValue2", "l3": "v3"}).Set(84)
baseVec.With(Labels{"l1": "multiDeleteV1", "l2": "diff3BaseValue2", "l3": "v3"}).Set(168)
curriedVec := baseVec.MustCurryWith(Labels{"l2": "curriedValue2"})
curriedVec.WithLabelValues("curriedValue1", "curriedValue3").Inc()
curriedVec.WithLabelValues("curriedValue1", "differentCurriedValue3").Inc()
curriedVec.WithLabelValues("differentCurriedValue1", "differentCurriedValue3").Inc()
// Try to delete nonexistent label with existent value from curried vector.
if got, want := curriedVec.DeletePartialMatch(Labels{"lx": "curriedValue1"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Try to delete valid label with nonexistent value from curried vector.
if got, want := curriedVec.DeletePartialMatch(Labels{"l1": "badValue1"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Try to delete from a curried vector based on labels which were curried.
// This operation succeeds when run against the base vector below.
if got, want := curriedVec.DeletePartialMatch(Labels{"l2": "curriedValue2"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Try to delete from a curried vector based on labels which were curried,
// but the value actually exists in the base vector.
if got, want := curriedVec.DeletePartialMatch(Labels{"l2": "baseValue2"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Delete multiple matching metrics from a curried vector based on partial values.
if got, want := curriedVec.DeletePartialMatch(Labels{"l1": "curriedValue1"}), 2; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Try to delete nonexistent label with existent value from base vector.
if got, want := baseVec.DeletePartialMatch(Labels{"lx": "curriedValue1"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Try to delete partially invalid labels from base vector.
if got, want := baseVec.DeletePartialMatch(Labels{"l1": "baseValue1", "l2": "badValue2"}), 0; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Delete from the base vector based on values which were curried.
// This operation fails when run against a curried vector above.
if got, want := baseVec.DeletePartialMatch(Labels{"l2": "curriedValue2"}), 1; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Delete multiple metrics from the base vector based on a single valid label.
if got, want := baseVec.DeletePartialMatch(Labels{"l1": "multiDeleteV1"}), 3; got != want {
t.Errorf("got %v, want %v", got, want)
}
// Delete from the base vector based on values which were not curried.
if got, want := baseVec.DeletePartialMatch(Labels{"l3": "baseValue3"}), 1; got != want {
t.Errorf("got %v, want %v", got, want)
}
// All metrics should have been deleted now.
assertNoMetric(t)
}
func TestMetricVec(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
testMetricVec(t, vec)
}
func TestMetricVecWithCollisions(t *testing.T) {
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
[]string{"l1", "l2"},
)
vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
testMetricVec(t, vec)
}
func testMetricVec(t *testing.T, vec *GaugeVec) {
vec.Reset() // Actually test Reset now!
var pair [2]string
// Keep track of metrics.
expected := map[[2]string]int{}
for i := 0; i < 1000; i++ {
pair[0], pair[1] = fmt.Sprint(i%4), fmt.Sprint(i%5) // Varying combinations multiples.
expected[pair]++
vec.WithLabelValues(pair[0], pair[1]).Inc()
expected[[2]string{"v1", "v2"}]++
vec.WithLabelValues("v1", "v2").Inc()
}
var total int
for _, metrics := range vec.metricMap.metrics {
for _, metric := range metrics {
total++
copy(pair[:], metric.values)
var metricOut dto.Metric
if err := metric.metric.Write(&metricOut); err != nil {
t.Fatal(err)
}
actual := *metricOut.Gauge.Value
var actualPair [2]string
for i, label := range metricOut.Label {
actualPair[i] = *label.Value
}
// Test output pair against metric.values to ensure we've selected
// the right one. We check this to ensure the below check means
// anything at all.
if actualPair != pair {
t.Fatalf("unexpected pair association in metric map: %v != %v", actualPair, pair)
}
if actual != float64(expected[pair]) {
t.Fatalf("incorrect counter value for %v: %v != %v", pair, actual, expected[pair])
}
}
}
if total != len(expected) {
t.Fatalf("unexpected number of metrics: %v != %v", total, len(expected))
}
vec.Reset()
if len(vec.metricMap.metrics) > 0 {
t.Fatalf("reset failed")
}
}
func TestMetricVecWithConstraints(t *testing.T) {
constraint := func(s string) string { return "x" + s }
vec := V2.NewGaugeVec(GaugeVecOpts{
GaugeOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "l1"},
{Name: "l2", Constraint: constraint},
},
})
testConstrainedMetricVec(t, vec, constraint)
}
func testConstrainedMetricVec(t *testing.T, vec *GaugeVec, constrain func(string) string) {
vec.Reset() // Actually test Reset now!
var pair [2]string
// Keep track of metrics.
expected := map[[2]string]int{}
for i := 0; i < 1000; i++ {
pair[0], pair[1] = fmt.Sprint(i%4), fmt.Sprint(i%5) // Varying combinations multiples.
expected[[2]string{pair[0], constrain(pair[1])}]++
vec.WithLabelValues(pair[0], pair[1]).Inc()
expected[[2]string{"v1", constrain("v2")}]++
vec.WithLabelValues("v1", "v2").Inc()
}
var total int
for _, metrics := range vec.metricMap.metrics {
for _, metric := range metrics {
total++
copy(pair[:], metric.values)
var metricOut dto.Metric
if err := metric.metric.Write(&metricOut); err != nil {
t.Fatal(err)
}
actual := *metricOut.Gauge.Value
var actualPair [2]string
for i, label := range metricOut.Label {
actualPair[i] = *label.Value
}
// Test output pair against metric.values to ensure we've selected
// the right one. We check this to ensure the below check means
// anything at all.
if actualPair != pair {
t.Fatalf("unexpected pair association in metric map: %v != %v", actualPair, pair)
}
if actual != float64(expected[pair]) {
t.Fatalf("incorrect counter value for %v: %v != %v", pair, actual, expected[pair])
}
}
}
if total != len(expected) {
t.Fatalf("unexpected number of metrics: %v != %v", total, len(expected))
}
vec.Reset()
if len(vec.metricMap.metrics) > 0 {
t.Fatalf("reset failed")
}
}
func TestCounterVecEndToEndWithCollision(t *testing.T) {
vec := NewCounterVec(
CounterOpts{
Name: "test",
Help: "helpless",
},
[]string{"labelname"},
)
vec.WithLabelValues("77kepQFQ8Kl").Inc()
vec.WithLabelValues("!0IC=VloaY").Add(2)
m := &dto.Metric{}
if err := vec.WithLabelValues("77kepQFQ8Kl").Write(m); err != nil {
t.Fatal(err)
}
if got, want := m.GetLabel()[0].GetValue(), "77kepQFQ8Kl"; got != want {
t.Errorf("got label value %q, want %q", got, want)
}
if got, want := m.GetCounter().GetValue(), 1.; got != want {
t.Errorf("got value %f, want %f", got, want)
}
m.Reset()
if err := vec.WithLabelValues("!0IC=VloaY").Write(m); err != nil {
t.Fatal(err)
}
if got, want := m.GetLabel()[0].GetValue(), "!0IC=VloaY"; got != want {
t.Errorf("got label value %q, want %q", got, want)
}
if got, want := m.GetCounter().GetValue(), 2.; got != want {
t.Errorf("got value %f, want %f", got, want)
}
}
func TestCurryVec(t *testing.T) {
vec := NewCounterVec(
CounterOpts{
Name: "test",
Help: "helpless",
},
[]string{"one", "two", "three"},
)
testCurryVec(t, vec)
}
func TestCurryVecWithCollisions(t *testing.T) {
vec := NewCounterVec(
CounterOpts{
Name: "test",
Help: "helpless",
},
[]string{"one", "two", "three"},
)
vec.hashAdd = func(h uint64, s string) uint64 { return 1 }
vec.hashAddByte = func(h uint64, b byte) uint64 { return 1 }
testCurryVec(t, vec)
}
func TestCurryVecWithConstraints(t *testing.T) {
constraint := func(s string) string { return "x" + s }
t.Run("constrainedLabels overlap variableLabels", func(t *testing.T) {
vec := V2.NewCounterVec(CounterVecOpts{
CounterOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "one"},
{Name: "two"},
{Name: "three", Constraint: constraint},
},
})
testCurryVec(t, vec)
})
t.Run("constrainedLabels reducing cardinality", func(t *testing.T) {
constraint := func(s string) string { return "x" }
vec := V2.NewCounterVec(CounterVecOpts{
CounterOpts{
Name: "test",
Help: "helpless",
},
ConstrainedLabels{
{Name: "one"},
{Name: "two"},
{Name: "three", Constraint: constraint},
},
})
testConstrainedCurryVec(t, vec, constraint)
})
}
func testCurryVec(t *testing.T, vec *CounterVec) {
assertMetrics := func(t *testing.T) {
n := 0
for _, m := range vec.metricMap.metrics {
n += len(m)
}
if n != 2 {
t.Error("expected two metrics, got", n)
}
m := &dto.Metric{}
c1, err := vec.GetMetricWithLabelValues("1", "2", "3")
if err != nil {
t.Fatal("unexpected error getting metric:", err)
}
c1.Write(m)
if want, got := 1., m.GetCounter().GetValue(); want != got {
t.Errorf("want %f as counter value, got %f", want, got)
}
m.Reset()
c2, err := vec.GetMetricWithLabelValues("11", "22", "33")
if err != nil {
t.Fatal("unexpected error getting metric:", err)
}
c2.Write(m)
if want, got := 1., m.GetCounter().GetValue(); want != got {
t.Errorf("want %f as counter value, got %f", want, got)
}
}
assertNoMetric := func(t *testing.T) {
if n := len(vec.metricMap.metrics); n != 0 {
t.Error("expected no metrics, got", n)
}
}
t.Run("zero labels", func(t *testing.T) {
c1 := vec.MustCurryWith(nil)
c2 := vec.MustCurryWith(nil)
c1.WithLabelValues("1", "2", "3").Inc()
c2.With(Labels{"one": "11", "two": "22", "three": "33"}).Inc()
assertMetrics(t)
if !c1.Delete(Labels{"one": "1", "two": "2", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("11", "22", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("first label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"one": "1"})
c2 := vec.MustCurryWith(Labels{"one": "11"})
c1.WithLabelValues("2", "3").Inc()
c2.With(Labels{"two": "22", "three": "33"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22", "three": "33"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2", "3") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("middle label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"two": "2"})
c2 := vec.MustCurryWith(Labels{"two": "22"})
c1.WithLabelValues("1", "3").Inc()
c2.With(Labels{"one": "11", "three": "33"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"one": "11", "three": "33"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("1", "3") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"one": "1", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("11", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("last label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"})
c2 := vec.MustCurryWith(Labels{"three": "33"})
c1.WithLabelValues("1", "2").Inc()
c2.With(Labels{"one": "11", "two": "22"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22", "one": "11"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("1", "2") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2", "one": "1"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("11", "22") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("two labels", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3", "one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33", "one": "11"})
c1.WithLabelValues("2").Inc()
c2.With(Labels{"two": "22"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("all labels", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3", "two": "2", "one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33", "one": "11", "two": "22"})
c1.WithLabelValues().Inc()
c2.With(nil).Inc()
assertMetrics(t)
if !c1.Delete(Labels{}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues() {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("double curry", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"}).MustCurryWith(Labels{"one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33"}).MustCurryWith(Labels{"one": "11"})
c1.WithLabelValues("2").Inc()
c2.With(Labels{"two": "22"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("use already curried label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"})
if _, err := c1.GetMetricWithLabelValues("1", "2", "3"); err == nil {
t.Error("expected error when using already curried label")
}
if _, err := c1.GetMetricWith(Labels{"one": "1", "two": "2", "three": "3"}); err == nil {
t.Error("expected error when using already curried label")
}
assertNoMetric(t)
c1.WithLabelValues("1", "2").Inc()
if c1.Delete(Labels{"one": "1", "two": "2", "three": "3"}) {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"one": "1", "two": "2"}) {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("curry already curried label", func(t *testing.T) {
if _, err := vec.MustCurryWith(Labels{"three": "3"}).CurryWith(Labels{"three": "33"}); err == nil {
t.Error("currying unexpectedly succeeded")
} else if err.Error() != `label name "three" is already curried` {
t.Error("currying returned unexpected error:", err)
}
})
t.Run("unknown label", func(t *testing.T) {
if _, err := vec.CurryWith(Labels{"foo": "bar"}); err == nil {
t.Error("currying unexpectedly succeeded")
} else if err.Error() != "1 unknown label(s) found during currying" {
t.Error("currying returned unexpected error:", err)
}
})
}
func testConstrainedCurryVec(t *testing.T, vec *CounterVec, constraint func(string) string) {
assertMetrics := func(t *testing.T) {
n := 0
for _, m := range vec.metricMap.metrics {
n += len(m)
}
if n != 2 {
t.Error("expected two metrics, got", n)
}
m := &dto.Metric{}
c1, err := vec.GetMetricWithLabelValues("1", "2", "3")
if err != nil {
t.Fatal("unexpected error getting metric:", err)
}
c1.Write(m)
if want, got := 1., m.GetCounter().GetValue(); want != got {
t.Errorf("want %f as counter value, got %f", want, got)
}
values := map[string]string{}
for _, label := range m.Label {
values[*label.Name] = *label.Value
}
if want, got := map[string]string{"one": "1", "two": "2", "three": constraint("3")}, values; !reflect.DeepEqual(want, got) {
t.Errorf("want %v as label values, got %v", want, got)
}
m.Reset()
c2, err := vec.GetMetricWithLabelValues("11", "22", "33")
if err != nil {
t.Fatal("unexpected error getting metric:", err)
}
c2.Write(m)
if want, got := 1., m.GetCounter().GetValue(); want != got {
t.Errorf("want %f as counter value, got %f", want, got)
}
values = map[string]string{}
for _, label := range m.Label {
values[*label.Name] = *label.Value
}
if want, got := map[string]string{"one": "11", "two": "22", "three": constraint("33")}, values; !reflect.DeepEqual(want, got) {
t.Errorf("want %v as label values, got %v", want, got)
}
}
assertNoMetric := func(t *testing.T) {
if n := len(vec.metricMap.metrics); n != 0 {
t.Error("expected no metrics, got", n)
}
}
t.Run("zero labels", func(t *testing.T) {
c1 := vec.MustCurryWith(nil)
c2 := vec.MustCurryWith(nil)
c1.WithLabelValues("1", "2", "3").Inc()
c2.With(Labels{"one": "11", "two": "22", "three": "33"}).Inc()
assertMetrics(t)
if !c1.Delete(Labels{"one": "1", "two": "2", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("11", "22", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("first label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"one": "1"})
c2 := vec.MustCurryWith(Labels{"one": "11"})
c1.WithLabelValues("2", "3").Inc()
c2.With(Labels{"two": "22", "three": "33"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22", "three": "33"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2", "3") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("middle label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"two": "2"})
c2 := vec.MustCurryWith(Labels{"two": "22"})
c1.WithLabelValues("1", "3").Inc()
c2.With(Labels{"one": "11", "three": "33"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"one": "11", "three": "33"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("1", "3") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"one": "1", "three": "3"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("11", "33") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("last label (constrained to static value)", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"})
c2 := vec.MustCurryWith(Labels{"three": "33"})
c1.WithLabelValues("1", "2").Inc()
c2.With(Labels{"one": "11", "two": "22"}).Inc()
assertMetrics(t)
if !c1.Delete(Labels{"two": "22", "one": "11"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("1", "2") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("two labels", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3", "one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33", "one": "11"})
c1.WithLabelValues("2").Inc()
c2.With(Labels{"two": "22"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("all labels", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3", "two": "2", "one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33", "one": "11", "two": "22"})
c1.WithLabelValues().Inc()
c2.With(nil).Inc()
assertMetrics(t)
if !c1.Delete(Labels{}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues() {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("double curry", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"}).MustCurryWith(Labels{"one": "1"})
c2 := vec.MustCurryWith(Labels{"three": "33"}).MustCurryWith(Labels{"one": "11"})
c1.WithLabelValues("2").Inc()
c2.With(Labels{"two": "22"}).Inc()
assertMetrics(t)
if c1.Delete(Labels{"two": "22"}) {
t.Error("deletion unexpectedly succeeded")
}
if c2.DeleteLabelValues("2") {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"two": "2"}) {
t.Error("deletion failed")
}
if !c2.DeleteLabelValues("22") {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("use already curried label", func(t *testing.T) {
c1 := vec.MustCurryWith(Labels{"three": "3"})
if _, err := c1.GetMetricWithLabelValues("1", "2", "3"); err == nil {
t.Error("expected error when using already curried label")
}
if _, err := c1.GetMetricWith(Labels{"one": "1", "two": "2", "three": "3"}); err == nil {
t.Error("expected error when using already curried label")
}
assertNoMetric(t)
c1.WithLabelValues("1", "2").Inc()
if c1.Delete(Labels{"one": "1", "two": "2", "three": "3"}) {
t.Error("deletion unexpectedly succeeded")
}
if !c1.Delete(Labels{"one": "1", "two": "2"}) {
t.Error("deletion failed")
}
assertNoMetric(t)
})
t.Run("curry already curried label", func(t *testing.T) {
if _, err := vec.MustCurryWith(Labels{"three": "3"}).CurryWith(Labels{"three": "33"}); err == nil {
t.Error("currying unexpectedly succeeded")
} else if err.Error() != `label name "three" is already curried` {
t.Error("currying returned unexpected error:", err)
}
})
t.Run("unknown label", func(t *testing.T) {
if _, err := vec.CurryWith(Labels{"foo": "bar"}); err == nil {
t.Error("currying unexpectedly succeeded")
} else if err.Error() != "1 unknown label(s) found during currying" {
t.Error("currying returned unexpected error:", err)
}
})
}
func BenchmarkMetricVecWithBasic(b *testing.B) {
benchmarkMetricVecWith(b, Labels{
"l1": "onevalue",
"l2": "twovalue",
})
}
func BenchmarkMetricVecWithLabelValuesBasic(b *testing.B) {
benchmarkMetricVecWithLabelValues(b, map[string][]string{
"l1": {"onevalue"},
"l2": {"twovalue"},
})
}
func BenchmarkMetricVecWithLabelValues2Keys10ValueCardinality(b *testing.B) {
benchmarkMetricVecWithLabelValuesCardinality(b, 2, 10)
}
func BenchmarkMetricVecWithLabelValues4Keys10ValueCardinality(b *testing.B) {
benchmarkMetricVecWithLabelValuesCardinality(b, 4, 10)
}
func BenchmarkMetricVecWithLabelValues2Keys100ValueCardinality(b *testing.B) {
benchmarkMetricVecWithLabelValuesCardinality(b, 2, 100)
}
func BenchmarkMetricVecWithLabelValues10Keys100ValueCardinality(b *testing.B) {
benchmarkMetricVecWithLabelValuesCardinality(b, 10, 100)
}
func BenchmarkMetricVecWithLabelValues10Keys1000ValueCardinality(b *testing.B) {
benchmarkMetricVecWithLabelValuesCardinality(b, 10, 1000)
}
func benchmarkMetricVecWithLabelValuesCardinality(b *testing.B, nkeys, nvalues int) {
labels := map[string][]string{}
for i := 0; i < nkeys; i++ {
var (
k = fmt.Sprintf("key-%v", i)
vs = make([]string, 0, nvalues)
)
for j := 0; j < nvalues; j++ {
vs = append(vs, fmt.Sprintf("value-%v", j))
}
labels[k] = vs
}
benchmarkMetricVecWithLabelValues(b, labels)
}
func benchmarkMetricVecWith(b *testing.B, labels map[string]string) {
var keys []string
for k := range labels {
keys = append(keys, k)
}
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
keys,
)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
vec.With(labels)
}
}
func benchmarkMetricVecWithLabelValues(b *testing.B, labels map[string][]string) {
var keys []string
for k := range labels { // Map order dependent, who cares though.
keys = append(keys, k)
}
values := make([]string, len(labels)) // Value cache for permutations.
vec := NewGaugeVec(
GaugeOpts{
Name: "test",
Help: "helpless",
},
keys,
)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Varies input across provide map entries based on key size.
for j, k := range keys {
candidates := labels[k]
values[j] = candidates[i%len(candidates)]
}
vec.WithLabelValues(values...)
}
}