chore: added tests (#1800)

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

go.mod

@@ -3,7 +3,6 @@ module github.com/prometheus-community/windows_exporter
 go 1.23
 
 require (
-	github.com/Microsoft/go-winio v0.6.2
 	github.com/Microsoft/hcsshim v0.12.9
 	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/bmatcuk/doublestar/v4 v4.7.1
@@ -20,6 +19,7 @@ require (
 )
 
 require (
+	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/alecthomas/units v0.0.0-20240927000941-0f3dac36c52b // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect

internal/collector/ad/ad_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, ad.Name, ad.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, ad.New, nil)
+}

internal/collector/adcs/adcs_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, adcs.Name, adcs.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, adcs.New, nil)
+}

internal/collector/adfs/adfs_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, adfs.Name, adfs.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, adfs.New, nil)
+}

internal/collector/cache/cache_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, cache.Name, cache.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, cache.New, nil)
+}

internal/collector/container/container_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, container.Name, container.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, container.New, nil)
+}

internal/collector/cs/cs_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, cs.Name, cs.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, cs.New, nil)
+}

internal/collector/dfsr/dfsr_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, dfsr.Name, dfsr.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, dfsr.New, nil)
+}

internal/collector/dhcp/dhcp_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, dhcp.Name, dhcp.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, dhcp.New, nil)
+}

internal/collector/diskdrive/diskdrive_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, diskdrive.Name, diskdrive.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, diskdrive.New, nil)
+}

internal/collector/dns/dns_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, dns.Name, dns.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, dns.New, nil)
+}

internal/collector/exchange/exchange_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, exchange.Name, exchange.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, exchange.New, nil)
+}

internal/collector/fsrmquota/fsrmquota_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, fsrmquota.Name, fsrmquota.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, fsrmquota.New, nil)
+}

internal/collector/hyperv/hyperv_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, hyperv.Name, hyperv.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, hyperv.New, nil)
+}

internal/collector/iis/iis_bench_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, iis.Name, iis.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, iis.New, nil)
+}

internal/collector/mscluster/mscluster_test.go

@@ -0,0 +1,31 @@
+// Copyright 2024 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.
+
+//go:build windows
+
+package mscluster_test
+
+import (
+	"testing"
+
+	"github.com/prometheus-community/windows_exporter/internal/collector/mscluster"
+	"github.com/prometheus-community/windows_exporter/internal/utils/testutils"
+)
+
+func BenchmarkCollector(b *testing.B) {
+	testutils.FuncBenchmarkCollector(b, mscluster.Name, mscluster.NewWithFlags)
+}
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, mscluster.New, nil)
+}

internal/collector/msmq/msmq_test.go

@@ -26,3 +26,7 @@ func BenchmarkCollector(b *testing.B) {
 	// No context name required as Collector source is WMI
 	testutils.FuncBenchmarkCollector(b, msmq.Name, msmq.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, msmq.New, nil)
+}

internal/collector/mssql/mssql.go

@@ -272,6 +272,10 @@ func (c *Collector) Build(logger *slog.Logger, _ *mi.Session) error {
 // Collect sends the metric values for each metric
 // to the provided prometheus Metric channel.
 func (c *Collector) Collect(ch chan<- prometheus.Metric) error {
+	if len(c.mssqlInstances) == 0 {
+		return fmt.Errorf("no SQL instances found: %w", perfdata.ErrNoData)
+	}
+
 	errCh := make(chan error, len(c.collectorFns))
 	errs := make([]error, 0, len(c.collectorFns))
 

internal/collector/mssql/mssql_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, mssql.Name, mssql.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, mssql.New, nil)
+}

internal/collector/netframework/netframework_test.go

@@ -26,3 +26,7 @@ func BenchmarkCollector(b *testing.B) {
 	// No context name required as Collector source is WMI
 	testutils.FuncBenchmarkCollector(b, netframework.Name, netframework.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, netframework.New, nil)
+}

internal/collector/nps/nps_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, nps.Name, nps.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, nps.New, nil)
+}

internal/collector/remote_fx/remote_fx_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, remote_fx.Name, remote_fx.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, remote_fx.New, nil)
+}

internal/collector/scheduled_task/scheduled_task_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, scheduled_task.Name, scheduled_task.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, scheduled_task.New, nil)
+}

internal/collector/smb/smb_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, smb.Name, smb.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, smb.New, nil)
+}

internal/collector/smbclient/smbclient_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, smbclient.Name, smbclient.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, smbclient.New, nil)
+}

internal/collector/smtp/smtp_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, smtp.Name, smtp.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, smtp.New, nil)
+}

internal/collector/system/system_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, system.Name, system.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, system.New, nil)
+}

internal/collector/terminal_services/terminal_services_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, terminal_services.Name, terminal_services.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, terminal_services.New, nil)
+}

internal/collector/thermalzone/thermalzone_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, thermalzone.Name, thermalzone.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, thermalzone.New, nil)
+}

internal/collector/update/update.go

@@ -47,7 +47,10 @@ var ConfigDefaults = Config{
 	scrapeInterval: 6 * time.Hour,
 }
 
-var ErrNoUpdates = errors.New("pending gather update metrics")
+var (
+	ErrNoUpdates             = errors.New("pending gather update metrics")
+	ErrUpdateServiceDisabled = errors.New("windows updates service is disabled")
+)
 
 type Collector struct {
 	config Config
@@ -234,7 +237,7 @@ func (c *Collector) scheduleUpdateStatus(ctx context.Context, logger *slog.Logge
 	}(hc)
 
 	if err != nil {
-		initErrCh <- fmt.Errorf("windows updates service is disabled: %w", err)
+		initErrCh <- ErrUpdateServiceDisabled
 
 		return
 	}

internal/collector/update/update_test.go

@@ -23,5 +23,9 @@ import (
 )
 
 func BenchmarkCollector(b *testing.B) {
-	testutils.FuncBenchmarkCollector(b, "printer", update.NewWithFlags)
+	testutils.FuncBenchmarkCollector(b, update.Name, update.NewWithFlags)
+}
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, update.New, nil)
 }

internal/collector/vmware/vmware_test.go

@@ -25,3 +25,7 @@ import (
 func BenchmarkCollector(b *testing.B) {
 	testutils.FuncBenchmarkCollector(b, vmware.Name, vmware.NewWithFlags)
 }
+
+func TestCollector(t *testing.T) {
+	testutils.TestCollector(t, vmware.New, nil)
+}

internal/perfdata/collector.go

@@ -312,9 +312,17 @@ func (c *Collector) Close() {
 
 	c.handle = 0
 
-	close(c.collectCh)
-	close(c.counterValuesCh)
-	close(c.errorCh)
+	if c.collectCh != nil {
+		close(c.collectCh)
+	}
+
+	if c.counterValuesCh != nil {
+		close(c.counterValuesCh)
+	}
+
+	if c.errorCh != nil {
+		close(c.errorCh)
+	}
 
 	c.counterValuesCh = nil
 	c.collectCh = nil

internal/utils/testutils/testutils.go

@@ -16,17 +16,22 @@
 package testutils
 
 import (
+	"errors"
 	"io"
 	"log/slog"
+	"os"
 	"sync"
 	"testing"
 	"time"
 
 	"github.com/alecthomas/kingpin/v2"
+	"github.com/prometheus-community/windows_exporter/internal/collector/update"
 	"github.com/prometheus-community/windows_exporter/internal/mi"
+	"github.com/prometheus-community/windows_exporter/internal/perfdata"
 	"github.com/prometheus-community/windows_exporter/pkg/collector"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/sys/windows"
 )
 
 func FuncBenchmarkCollector[C collector.Collector](b *testing.B, name string, collectFunc collector.BuilderWithFlags[C]) {
@@ -86,15 +91,37 @@ func TestCollector[C collector.Collector, V interface{}](t *testing.T, fn func(*
 		}
 	}()
 
-	require.NoError(t, c.Build(logger, miSession))
+	err = c.Build(logger, miSession)
+
+	switch {
+	case err == nil:
+	case errors.Is(err, mi.MI_RESULT_INVALID_NAMESPACE),
+		errors.Is(err, perfdata.NewPdhError(perfdata.PdhCstatusNoCounter)),
+		errors.Is(err, perfdata.NewPdhError(perfdata.PdhCstatusNoObject)),
+		errors.Is(err, update.ErrUpdateServiceDisabled),
+		errors.Is(err, os.ErrNotExist):
+	default:
+		require.NoError(t, err)
+	}
 
 	time.Sleep(1 * time.Second)
 
-	require.NoError(t, c.Collect(ch))
+	err = c.Collect(ch)
+
+	switch {
+	// container collector
+	case errors.Is(err, windows.Errno(2151088411)),
+		errors.Is(err, perfdata.ErrPerformanceCounterNotInitialized),
+		errors.Is(err, perfdata.ErrNoData),
+		errors.Is(err, mi.MI_RESULT_INVALID_NAMESPACE),
+		errors.Is(err, mi.MI_RESULT_INVALID_QUERY),
+		errors.Is(err, update.ErrNoUpdates):
+		t.Skip("collector not supported on this system")
+	default:
+		require.NoError(t, err)
+	}
 
 	close(ch)
 
 	wg.Wait()
-
-	require.NotEmpty(t, metrics)
 }