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/*
* umoci: Umoci Modifies Open Containers' Images
* Copyright (C) 2018 Cisco Systems
*
* 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.
*/
package umoci
import (
"io/ioutil"
"os"
"testing"
)
func TestCreateExistingFails(t *testing.T) {
dir, err := ioutil.TempDir("", "umoci_testCreateExistingFails")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
// opening a bad layout should fail
_, err = OpenLayout(dir)
if err == nil {
t.Fatal("opening non-existent layout succeeded?")
}
// remove directory so that create can create it
os.RemoveAll(dir)
// create should work
_, err = CreateLayout(dir)
if err != nil {
t.Fatal(err)
}
// but not twice
_, err = CreateLayout(dir)
if err == nil {
t.Fatal("create worked twice?")
}
// but open should work now
_, err = OpenLayout(dir)
if err != nil {
t.Fatal(err)
}
}
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