| // Copyright 2015 The etcd Authors |
| // |
| // 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 ( |
| "fmt" |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| "reflect" |
| "testing" |
| "time" |
| ) |
| |
| func TestPurgeFile(t *testing.T) { |
| dir, err := ioutil.TempDir("", "purgefile") |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer os.RemoveAll(dir) |
| |
| // minimal file set |
| for i := 0; i < 3; i++ { |
| f, ferr := os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", i))) |
| if ferr != nil { |
| t.Fatal(err) |
| } |
| f.Close() |
| } |
| |
| stop, purgec := make(chan struct{}), make(chan string, 10) |
| |
| // keep 3 most recent files |
| errch := purgeFile(dir, "test", 3, time.Millisecond, stop, purgec) |
| select { |
| case f := <-purgec: |
| t.Errorf("unexpected purge on %q", f) |
| case <-time.After(10 * time.Millisecond): |
| } |
| |
| // rest of the files |
| for i := 4; i < 10; i++ { |
| go func(n int) { |
| f, ferr := os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", n))) |
| if ferr != nil { |
| t.Fatal(err) |
| } |
| f.Close() |
| }(i) |
| } |
| |
| // watch files purge away |
| for i := 4; i < 10; i++ { |
| select { |
| case <-purgec: |
| case <-time.After(time.Second): |
| t.Errorf("purge took too long") |
| } |
| } |
| |
| fnames, rerr := ReadDir(dir) |
| if rerr != nil { |
| t.Fatal(rerr) |
| } |
| wnames := []string{"7.test", "8.test", "9.test"} |
| if !reflect.DeepEqual(fnames, wnames) { |
| t.Errorf("filenames = %v, want %v", fnames, wnames) |
| } |
| |
| // no error should be reported from purge routine |
| select { |
| case f := <-purgec: |
| t.Errorf("unexpected purge on %q", f) |
| case err := <-errch: |
| t.Errorf("unexpected purge error %v", err) |
| case <-time.After(10 * time.Millisecond): |
| } |
| close(stop) |
| } |
| |
| func TestPurgeFileHoldingLockFile(t *testing.T) { |
| dir, err := ioutil.TempDir("", "purgefile") |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer os.RemoveAll(dir) |
| |
| for i := 0; i < 10; i++ { |
| var f *os.File |
| f, err = os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", i))) |
| if err != nil { |
| t.Fatal(err) |
| } |
| f.Close() |
| } |
| |
| // create a purge barrier at 5 |
| p := filepath.Join(dir, fmt.Sprintf("%d.test", 5)) |
| l, err := LockFile(p, os.O_WRONLY, PrivateFileMode) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| stop, purgec := make(chan struct{}), make(chan string, 10) |
| errch := purgeFile(dir, "test", 3, time.Millisecond, stop, purgec) |
| |
| for i := 0; i < 5; i++ { |
| select { |
| case <-purgec: |
| case <-time.After(time.Second): |
| t.Fatalf("purge took too long") |
| } |
| } |
| |
| fnames, rerr := ReadDir(dir) |
| if rerr != nil { |
| t.Fatal(rerr) |
| } |
| |
| wnames := []string{"5.test", "6.test", "7.test", "8.test", "9.test"} |
| if !reflect.DeepEqual(fnames, wnames) { |
| t.Errorf("filenames = %v, want %v", fnames, wnames) |
| } |
| |
| select { |
| case s := <-purgec: |
| t.Errorf("unexpected purge %q", s) |
| case err = <-errch: |
| t.Errorf("unexpected purge error %v", err) |
| case <-time.After(10 * time.Millisecond): |
| } |
| |
| // remove the purge barrier |
| if err = l.Close(); err != nil { |
| t.Fatal(err) |
| } |
| |
| // wait for rest of purges (5, 6) |
| for i := 0; i < 2; i++ { |
| select { |
| case <-purgec: |
| case <-time.After(time.Second): |
| t.Fatalf("purge took too long") |
| } |
| } |
| |
| fnames, rerr = ReadDir(dir) |
| if rerr != nil { |
| t.Fatal(rerr) |
| } |
| wnames = []string{"7.test", "8.test", "9.test"} |
| if !reflect.DeepEqual(fnames, wnames) { |
| t.Errorf("filenames = %v, want %v", fnames, wnames) |
| } |
| |
| select { |
| case f := <-purgec: |
| t.Errorf("unexpected purge on %q", f) |
| case err := <-errch: |
| t.Errorf("unexpected purge error %v", err) |
| case <-time.After(10 * time.Millisecond): |
| } |
| |
| close(stop) |
| } |