| // Copyright 2015 CoreOS, Inc. |
| // |
| // 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 fileutil |
| |
| import ( |
| "io/ioutil" |
| "os" |
| "runtime" |
| "testing" |
| ) |
| |
| func TestPreallocate(t *testing.T) { |
| if runtime.GOOS != "linux" { |
| t.Skipf("skip testPreallocate, OS = %s", runtime.GOOS) |
| } |
| |
| p, err := ioutil.TempDir(os.TempDir(), "preallocateTest") |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer os.RemoveAll(p) |
| |
| f, err := ioutil.TempFile(p, "") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| size := 64 * 1000 |
| err = Preallocate(f, size) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| stat, err := f.Stat() |
| if err != nil { |
| t.Fatal(err) |
| } |
| if stat.Size() != 0 { |
| t.Errorf("size = %d, want %d", stat.Size(), 0) |
| } |
| } |
