1 // Copyright 2019 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 package fs 15 16 import "testing" 17 18 const ( 19 sysTestFixtures = "testdata/fixtures/sys" 20 ) 21 22 func TestNewFS(t *testing.T) { 23 if _, err := NewFS("foobar"); err == nil { 24 t.Error("want NewFS to fail for non-existing mount point") 25 } 26 27 if _, err := NewFS("doc.go"); err == nil { 28 t.Error("want NewFS to fail if mount point is not a directory") 29 } 30 31 if _, err := NewFS(sysTestFixtures); err != nil { 32 t.Error("want NewFS to succeed if mount point exists") 33 } 34 } 35