log into file (#357)

[bytom/vapor.git] / vendor / github.com / lestrrat-go / file-rotatelogs / example_test.go

diff --git a/vendor/github.com/lestrrat-go/file-rotatelogs/example_test.go b/vendor/github.com/lestrrat-go/file-rotatelogs/example_test.go
new file mode 100644 (file)
index 0000000..02fb5f6
--- /dev/null
+++ b/vendor/github.com/lestrrat-go/file-rotatelogs/example_test.go
@@ -0,0 +1,56 @@
+package rotatelogs_test
+
+import (
+       "fmt"
+       "io/ioutil"
+       "os"
+       rotatelogs "github.com/lestrrat-go/file-rotatelogs"
+)
+
+func ExampleForceNewFile () {
+       logDir, err := ioutil.TempDir("", "rotatelogs_test")
+       if err != nil {
+               fmt.Println("could not create log directory ", err)
+               return
+       }
+       logPath := fmt.Sprintf("%s/test.log", logDir)
+
+       for i := 0; i < 2; i++ {
+               writer, err := rotatelogs.New(logPath,
+                       rotatelogs.ForceNewFile(),
+               )
+               if err != nil {
+                       fmt.Println("Could not open log file ", err)
+                       return
+               }
+
+               n, err := writer.Write([]byte("test"))
+               if err != nil || n != 4 {
+                       fmt.Println("Write failed ", err, " number written ", n)
+                       return
+               }
+               err = writer.Close()
+               if err != nil {
+                       fmt.Println("Close failed ", err)
+                       return
+               }
+       }
+
+       files, err := ioutil.ReadDir(logDir)
+       if err != nil {
+               fmt.Println("ReadDir failed ", err)
+               return
+       }
+       for _, file := range files {
+               fmt.Println(file.Name(), file.Size())
+       }
+
+       err = os.RemoveAll(logDir)
+       if err != nil {
+               fmt.Println("RemoveAll failed ", err)
+               return
+       }
+       // OUTPUT:
+       // test.log 4
+       // test.log.1 4
+}