Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/system/system_test.go

@@ -0,0 +1,64 @@
+package system
+
+import (
+	"testing"
+
+	"github.com/shirou/gopsutil/v4/host"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUniqueUsers(t *testing.T) {
+	tests := []struct {
+		name     string
+		expected int
+		data     []host.UserStat
+	}{
+		{
+			name:     "single entry",
+			expected: 1,
+			data: []host.UserStat{
+				{User: "root"},
+			},
+		},
+		{
+			name:     "empty entry",
+			expected: 0,
+		},
+		{
+			name:     "all duplicates",
+			expected: 1,
+			data: []host.UserStat{
+				{User: "root"},
+				{User: "root"},
+				{User: "root"},
+			},
+		},
+		{
+			name:     "all unique",
+			expected: 3,
+			data: []host.UserStat{
+				{User: "root"},
+				{User: "ubuntu"},
+				{User: "ec2-user"},
+			},
+		},
+		{
+			name:     "mix of dups",
+			expected: 3,
+			data: []host.UserStat{
+				{User: "root"},
+				{User: "ubuntu"},
+				{User: "ubuntu"},
+				{User: "ubuntu"},
+				{User: "ec2-user"},
+				{User: "ec2-user"},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual := findUniqueUsers(tt.data)
+			require.Equal(t, tt.expected, actual, tt.name)
+		})
+	}
+}