1 files changed, 136 insertions, 0 deletions
diff --git a/src/go/plugins/system/cpu/cpu_linux_test.go b/src/go/plugins/system/cpu/cpu_linux_test.go
new file mode 100644
index 00000000000..87d719352ca
--- /dev/null
+++ b/src/go/plugins/system/cpu/cpu_linux_test.go
@@ -0,0 +1,136 @@
+/*
+** Zabbix
+** Copyright (C) 2001-2022 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+package cpu
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestPlugin_addCpu(t *testing.T) {
+	type fields struct {
+		cpus []*cpuUnit
+	}
+	type args struct {
+		index int
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		args   args
+		want   []*cpuUnit
+	}{
+		{
+			"one_offline_cpu",
+			fields{
+				[]*cpuUnit{
+					{index: -1, status: cpuStatusOffline},
+					{index: 0, status: cpuStatusOffline},
+					{index: 1, status: cpuStatusOffline},
+				},
+			},
+			args{2},
+			[]*cpuUnit{
+				{index: -1, status: cpuStatusOffline},
+				{index: 0, status: cpuStatusOffline},
+				{index: 1, status: cpuStatusOffline},
+				{index: 2, status: cpuStatusOffline},
+			},
+		},
+		{
+			"two_offline_cpu",
+			fields{
+				[]*cpuUnit{
+					{index: -1, status: cpuStatusOffline},
+					{index: 0, status: cpuStatusOffline},
+					{index: 1, status: cpuStatusOffline},
+				},
+			},
+			args{3},
+			[]*cpuUnit{
+				{index: -1, status: cpuStatusOffline},
+				{index: 0, status: cpuStatusOffline},
+				{index: 1, status: cpuStatusOffline},
+				{index: 2, status: cpuStatusOffline},
+				{index: 3, status: cpuStatusOffline},
+			},
+		},
+		{
+			"ten_offline_cpu",
+			fields{
+				[]*cpuUnit{
+					{index: -1, status: cpuStatusOffline},
+					{index: 0, status: cpuStatusOffline},
+					{index: 1, status: cpuStatusOffline},
+				},
+			},
+			args{11},
+			[]*cpuUnit{
+				{index: -1, status: cpuStatusOffline},
+				{index: 0, status: cpuStatusOffline},
+				{index: 1, status: cpuStatusOffline},
+				{index: 2, status: cpuStatusOffline},
+				{index: 3, status: cpuStatusOffline},
+				{index: 4, status: cpuStatusOffline},
+				{index: 5, status: cpuStatusOffline},
+				{index: 6, status: cpuStatusOffline},
+				{index: 7, status: cpuStatusOffline},
+				{index: 8, status: cpuStatusOffline},
+				{index: 9, status: cpuStatusOffline},
+				{index: 10, status: cpuStatusOffline},
+				{index: 11, status: cpuStatusOffline},
+			},
+		},
+		{
+			"no_offline_cpu",
+			fields{
+				[]*cpuUnit{
+					{index: -1, status: cpuStatusOffline},
+					{index: 0, status: cpuStatusOffline},
+					{index: 1, status: cpuStatusOffline},
+				},
+			},
+			args{1},
+			[]*cpuUnit{
+				{index: -1, status: cpuStatusOffline},
+				{index: 0, status: cpuStatusOffline},
+				{index: 1, status: cpuStatusOffline},
+			},
+		},
+		{
+			"empty", fields{[]*cpuUnit{}}, args{}, []*cpuUnit{},
+		},
+		{
+			"nil", fields{nil}, args{}, nil,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			p := &Plugin{
+				cpus: tt.fields.cpus,
+			}
+			p.addCpu(tt.args.index)
+
+			if !reflect.DeepEqual(p.cpus, tt.want) {
+				t.Errorf("addCpu() got = %v, want %v", p.cpus, tt.want)
+			}
+		})
+	}
+}