node_exporter/collector/interrupts_linux_test.go

// Copyright 2015 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 !nointerrupts
// +build !nointerrupts

package collector

import (
	"os"
	"testing"
)

func TestInterrupts(t *testing.T) {
	file, err := os.Open("fixtures/proc/interrupts")
	if err != nil {
		t.Fatal(err)
	}
	defer file.Close()

	interrupts, err := parseInterrupts(file)
	if err != nil {
		t.Fatal(err)
	}

	if want, got := "5031", interrupts["NMI"].values[1]; want != got {
		t.Errorf("want interrupts value %s, got %s", want, got)
	}

	if want, got := "4968", interrupts["NMI"].values[3]; want != got {
		t.Errorf("want interrupts value %s, got %s", want, got)
	}

	if want, got := "IR-IO-APIC-edge", interrupts["12"].info; want != got {
		t.Errorf("want interrupts info %s, got %s", want, got)
	}

	if want, got := "i8042", interrupts["12"].devices; want != got {
		t.Errorf("want interrupts devices %s, got %s", want, got)
	}

}

// https://github.com/prometheus/node_exporter/issues/2557
// On aarch64 the interrupts file can have zero spaces between the label of
// the row and the first value if the value is large
func TestInterruptsArm(t *testing.T) {
	file, err := os.Open("fixtures/proc/interrupts_aarch64")
	if err != nil {
		t.Fatal(err)
	}
	defer file.Close()

	interrupts, err := parseInterrupts(file)
	if err != nil {
		t.Fatal(err)
	}

	if _, ok := interrupts["IPI0"]; !ok {
		t.Errorf("IPI0 label not found in interrupts")
	}
}