56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package continuity
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import (
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"bytes"
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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)
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func TestAtomicWriteFile(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "atomic-write-test")
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if err != nil {
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t.Fatalf("Error when creating temporary directory: %s", err)
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}
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defer os.RemoveAll(tmpDir)
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expected := []byte("barbaz")
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if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, 0666); err != nil {
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t.Fatalf("Error writing to file: %v", err)
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}
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actual, err := ioutil.ReadFile(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error reading from file: %v", err)
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}
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if bytes.Compare(actual, expected) != 0 {
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t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
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}
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st, err := os.Stat(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error statting file: %v", err)
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}
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if expected := os.FileMode(0666); st.Mode() != expected {
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t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
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}
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}
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