github.com/tych0/umoci@v0.4.2/api_test.go (about) 1 /* 2 * umoci: Umoci Modifies Open Containers' Images 3 * Copyright (C) 2018 Cisco Systems 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package umoci 19 20 import ( 21 "io/ioutil" 22 "os" 23 "testing" 24 ) 25 26 func TestCreateExistingFails(t *testing.T) { 27 dir, err := ioutil.TempDir("", "umoci_testCreateExistingFails") 28 if err != nil { 29 t.Fatal(err) 30 } 31 defer os.RemoveAll(dir) 32 33 // opening a bad layout should fail 34 _, err = OpenLayout(dir) 35 if err == nil { 36 t.Fatal("opening non-existent layout succeeded?") 37 } 38 39 // remove directory so that create can create it 40 os.RemoveAll(dir) 41 42 // create should work 43 _, err = CreateLayout(dir) 44 if err != nil { 45 t.Fatal(err) 46 } 47 48 // but not twice 49 _, err = CreateLayout(dir) 50 if err == nil { 51 t.Fatal("create worked twice?") 52 } 53 54 // but open should work now 55 _, err = OpenLayout(dir) 56 if err != nil { 57 t.Fatal(err) 58 } 59 }