github.com/Cloud-Foundations/Dominator@v0.3.4/lib/fsutil/waitFile_test.go (about)

     1  package fsutil
     2  
     3  import (
     4  	"io/ioutil"
     5  	"os"
     6  	"path"
     7  	"testing"
     8  	"time"
     9  )
    10  
    11  func TestWaitFile(t *testing.T) {
    12  	dirname, err := ioutil.TempDir("", "WaitFileTests")
    13  	if err != nil {
    14  		t.Error(err)
    15  	}
    16  	defer os.RemoveAll(dirname)
    17  	pathNotExist := path.Join(dirname, "never-exists")
    18  	rc, err := WaitFile(pathNotExist, time.Microsecond)
    19  	if err == nil {
    20  		t.Errorf("Expected timeout error for non-existent file")
    21  		rc.Close()
    22  	}
    23  	pathExists := path.Join(dirname, "exists")
    24  	file, err := os.Create(pathExists)
    25  	if err != nil {
    26  		t.Error(err)
    27  	}
    28  	file.Close()
    29  	rc, err = WaitFile(pathExists, time.Microsecond)
    30  	if err != nil {
    31  		t.Error(err)
    32  	} else {
    33  		rc.Close()
    34  	}
    35  	pathExistsLater := path.Join(dirname, "exists-later")
    36  	go func() {
    37  		time.Sleep(time.Millisecond * 50)
    38  		file, err := os.Create(pathExistsLater)
    39  		if err != nil {
    40  			t.Error(err)
    41  			return
    42  		}
    43  		file.Close()
    44  	}()
    45  	rc, err = WaitFile(pathExistsLater, time.Millisecond*10)
    46  	if err == nil {
    47  		rc.Close()
    48  		t.Errorf("Expected timeout error for non-existent file")
    49  	}
    50  	rc, err = WaitFile(pathExistsLater, time.Millisecond*90)
    51  	if err != nil {
    52  		t.Error(err)
    53  	} else {
    54  		rc.Close()
    55  	}
    56  }