process: Use registry collector for V1 data (#1814)

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

internal/pdh/collector_test.go

@@ -0,0 +1,71 @@
+// 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 pdh_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/prometheus-community/windows_exporter/internal/pdh"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type process struct {
+	Name        string
+	ThreadCount float64 `perfdata:"Thread Count"`
+}
+
+func TestCollector(t *testing.T) {
+	t.Parallel()
+
+	for _, tc := range []struct {
+		object    string
+		instances []string
+	}{
+		{
+			object:    "Process",
+			instances: []string{"*"},
+		},
+	} {
+		t.Run(tc.object, func(t *testing.T) {
+			t.Parallel()
+
+			performanceData, err := pdh.NewCollector[process](tc.object, tc.instances)
+			require.NoError(t, err)
+
+			time.Sleep(100 * time.Millisecond)
+
+			var data []process
+
+			err = performanceData.Collect(&data)
+			require.NoError(t, err)
+			require.NotEmpty(t, data)
+
+			err = performanceData.Collect(&data)
+			require.NoError(t, err)
+			require.NotEmpty(t, data)
+
+			for _, instance := range data {
+				if instance.Name == "Idle" || instance.Name == "Secure System" {
+					continue
+				}
+
+				assert.NotZerof(t, instance.ThreadCount, "object: %s, instance: %s, counter: %s", tc.object, instance, instance.ThreadCount)
+			}
+		})
+	}
+}