mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-10-17 10:09:05 +02:00
338 lines
8.5 KiB
Go
338 lines
8.5 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build windows
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package pdh_test
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import (
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"log/slog"
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"sync"
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"testing"
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"time"
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"github.com/prometheus-community/windows_exporter/internal/pdh"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/stretchr/testify/require"
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)
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type process struct {
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Name string
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ThreadCount float64 `perfdata:"Thread Count"`
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}
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func TestCollector(t *testing.T) {
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t.Parallel()
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for _, tc := range []struct {
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object string
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instances []string
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}{
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{
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object: "Process",
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instances: []string{"*"},
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},
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} {
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t.Run(tc.object, func(t *testing.T) {
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t.Parallel()
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performanceData, err := pdh.NewCollector[process](slog.New(slog.DiscardHandler), pdh.CounterTypeRaw, tc.object, tc.instances)
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require.NoError(t, err)
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time.Sleep(100 * time.Millisecond)
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var data []process
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err = performanceData.Collect(&data)
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require.NoError(t, err)
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require.NotEmpty(t, data)
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err = performanceData.Collect(&data)
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require.NoError(t, err)
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require.NotEmpty(t, data)
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for _, instance := range data {
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if instance.Name == "Idle" || instance.Name == "Secure System" {
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continue
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}
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require.NotZerof(t, instance.ThreadCount, "object: %s, instance: %s, counter: %s", tc.object, instance, instance.ThreadCount)
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}
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})
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}
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}
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func TestCollectorConcurrentCollect(t *testing.T) {
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t.Parallel()
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for _, counterType := range []pdh.CounterType{pdh.CounterTypeRaw, pdh.CounterTypeFormatted} {
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t.Run(string(counterType), func(t *testing.T) {
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t.Parallel()
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collector, err := pdh.NewCollector[process](slog.New(slog.DiscardHandler), counterType, "Process", pdh.InstancesAll)
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require.NoError(t, err)
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t.Cleanup(collector.Close)
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const callers = 8
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data := make([][]process, callers)
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errs := make([]error, callers)
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start := make(chan struct{})
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var wg sync.WaitGroup
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for i := range callers {
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wg.Go(func() {
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<-start
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for range 4 {
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if errs[i] = collector.Collect(&data[i]); errs[i] != nil {
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return
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}
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}
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})
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}
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close(start)
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wg.Wait()
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for i := range callers {
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require.NoError(t, errs[i])
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require.NotEmpty(t, data[i])
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}
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})
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}
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}
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func TestCollectorConcurrentClose(t *testing.T) {
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t.Parallel()
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collector, err := pdh.NewCollector[process](slog.New(slog.DiscardHandler), pdh.CounterTypeRaw, "Process", pdh.InstancesAll)
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require.NoError(t, err)
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t.Cleanup(collector.Close)
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const callers = 8
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errs := make([]error, callers)
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start := make(chan struct{})
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var wg sync.WaitGroup
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for i := range callers {
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wg.Go(func() {
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<-start
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var data []process
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errs[i] = collector.Collect(&data)
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})
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}
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wg.Go(func() {
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<-start
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collector.Close()
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})
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close(start)
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wg.Wait()
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for _, err := range errs {
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if err != nil {
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require.ErrorIs(t, err, pdh.ErrPerformanceCounterNotInitialized)
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}
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}
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var data []process
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require.ErrorIs(t, collector.Collect(&data), pdh.ErrPerformanceCounterNotInitialized)
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collector.Close()
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}
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func TestCollectorInitializationError(t *testing.T) {
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t.Parallel()
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type invalidProcess struct {
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ThreadCount float64 `perfdata:"Thread Count"`
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HandleCount string `perfdata:"Handle Count"`
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}
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collector, err := pdh.NewCollector[invalidProcess](slog.New(slog.DiscardHandler), pdh.CounterTypeRaw, "Process", pdh.InstancesAll)
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require.ErrorContains(t, err, "field HandleCount must be a float64")
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require.NotNil(t, collector)
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t.Cleanup(collector.Close)
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var data []invalidProcess
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require.ErrorIs(t, collector.Collect(&data), pdh.ErrPerformanceCounterNotInitialized)
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}
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type processorInformation struct {
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Name string
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ProcessorTime float64 `perfdata:"% Processor Time"`
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IdleTime float64 `perfdata:"% Idle Time"`
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}
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// TestCollectorExplicitInstances verifies that a collector built with an explicit
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// list of instances returns one row per requested instance. Each instance has its
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// own counter handle, and PDH writes every single-item result into the same buffer,
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// so the instance names must not be resolved through a cache keyed by buffer address.
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func TestCollectorExplicitInstances(t *testing.T) {
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t.Parallel()
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logger := slog.New(slog.DiscardHandler)
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discovery, err := pdh.NewCollector[processorInformation](logger, pdh.CounterTypeRaw, "Processor Information", pdh.InstancesAll)
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require.NoError(t, err)
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t.Cleanup(discovery.Close)
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var all []processorInformation
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require.NoError(t, discovery.Collect(&all))
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instances := make([]string, 0, 3)
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for _, row := range all {
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if len(instances) == cap(instances) {
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break
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}
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instances = append(instances, row.Name)
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}
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if len(instances) < 2 {
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t.Skipf("need at least 2 Processor Information instances, got %v", instances)
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}
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for _, counterType := range []pdh.CounterType{pdh.CounterTypeRaw, pdh.CounterTypeFormatted} {
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t.Run(string(counterType), func(t *testing.T) {
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t.Parallel()
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collector, err := pdh.NewCollector[processorInformation](logger, counterType, "Processor Information", instances)
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require.NoError(t, err)
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t.Cleanup(collector.Close)
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// Formatted rate counters need two samples before they report a value.
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time.Sleep(100 * time.Millisecond)
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var data []processorInformation
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require.NoError(t, collector.Collect(&data))
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names := make([]string, 0, len(data))
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for _, row := range data {
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names = append(names, row.Name)
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}
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require.ElementsMatch(t, instances, names)
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})
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}
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}
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func TestNewCollectorNonStruct(t *testing.T) {
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t.Parallel()
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_, err := pdh.NewCollector[int](slog.New(slog.DiscardHandler), pdh.CounterTypeRaw, "Process", pdh.InstancesAll)
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require.Error(t, err)
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}
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func TestDynamicCollector(t *testing.T) {
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t.Parallel()
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counters := []string{"Thread Count", "Handle Count"}
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collector, err := pdh.NewDynamicCollector(slog.New(slog.DiscardHandler), pdh.CounterTypeRaw, "Process", pdh.InstancesAll, counters)
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require.NoError(t, err)
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t.Cleanup(collector.Close)
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var data []pdh.Row
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require.NoError(t, collector.Collect(&data))
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require.NotEmpty(t, data)
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for _, row := range data {
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require.NotEmpty(t, row.Name)
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require.Len(t, row.Values, len(counters))
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if row.Name == "Idle" || row.Name == "Secure System" {
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continue
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}
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require.NotZerof(t, row.Values[0], "instance: %s, counter: %s", row.Name, counters[0])
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}
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}
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// TestNewCollectorInvalidInput checks that invalid input returns no collector,
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// so there is nothing for the caller to close.
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func TestNewCollectorInvalidInput(t *testing.T) {
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t.Parallel()
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logger := slog.New(slog.DiscardHandler)
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collector, err := pdh.NewCollector[process](logger, "invalid", "Process", pdh.InstancesAll)
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require.ErrorContains(t, err, "invalid result type")
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require.Nil(t, collector)
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collector2, err := pdh.NewCollector[struct{ Name string }](logger, pdh.CounterTypeRaw, "Process", pdh.InstancesAll)
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require.ErrorContains(t, err, "no counters configured")
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require.Nil(t, collector2)
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}
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type processIO struct {
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Name string
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ThreadCount float64 `perfdata:"Thread Count"`
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IOReadBytesPS float64 `perfdata:"IO Read Bytes/sec"`
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}
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// TestCollectorMetricType checks that every counter carries its own metric
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// type, independent of the other counters of the object.
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func TestCollectorMetricType(t *testing.T) {
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t.Parallel()
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for _, tc := range []struct {
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resultType pdh.CounterType
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threadCount prometheus.ValueType
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ioReadBytes prometheus.ValueType
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}{
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{pdh.CounterTypeRaw, prometheus.GaugeValue, prometheus.CounterValue},
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{pdh.CounterTypeFormatted, prometheus.GaugeValue, prometheus.GaugeValue},
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} {
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t.Run(string(tc.resultType), func(t *testing.T) {
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t.Parallel()
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collector, err := pdh.NewCollector[processIO](slog.New(slog.DiscardHandler), tc.resultType, "Process", pdh.InstancesAll)
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require.NoError(t, err)
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t.Cleanup(collector.Close)
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metricType, ok := collector.MetricType("Thread Count")
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require.True(t, ok)
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require.Equal(t, tc.threadCount, metricType)
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metricType, ok = collector.MetricType("IO Read Bytes/sec")
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require.True(t, ok)
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require.Equal(t, tc.ioReadBytes, metricType)
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_, ok = collector.MetricType("unknown")
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require.False(t, ok)
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})
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}
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}
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