1 // Copyright 2017 The Prometheus Authors 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 //go:build linux 15 // +build linux 16 17 package sysfs 18 19 import "testing" 20 21 const ( 22 sysTestFixtures = "testdata/fixtures/sys" 23 ) 24 25 func TestNewFS(t *testing.T) { 26 if _, err := NewFS("foobar"); err == nil { 27 t.Error("want NewFS to fail for non-existing mount point") 28 } 29 30 if _, err := NewFS("doc.go"); err == nil { 31 t.Error("want NewFS to fail if mount point is not a directory") 32 } 33 34 if _, err := NewFS(sysTestFixtures); err != nil { 35 t.Error("want NewFS to succeed if mount point exists") 36 } 37 } 38