github.com/zhuohuang-hust/src-cbuild@v0.0.0-20230105071821-c7aab3e7c840/mergeCode/runc/libcontainer/devices/devices_test.go (about)

     1  // +build linux freebsd
     2  
     3  package devices
     4  
     5  import (
     6  	"errors"
     7  	"os"
     8  	"testing"
     9  )
    10  
    11  func TestDeviceFromPathLstatFailure(t *testing.T) {
    12  	testError := errors.New("test error")
    13  
    14  	// Override os.Lstat to inject error.
    15  	osLstat = func(path string) (os.FileInfo, error) {
    16  		return nil, testError
    17  	}
    18  
    19  	_, err := DeviceFromPath("", "")
    20  	if err != testError {
    21  		t.Fatalf("Unexpected error %v, expected %v", err, testError)
    22  	}
    23  }
    24  
    25  func TestHostDevicesIoutilReadDirFailure(t *testing.T) {
    26  	testError := errors.New("test error")
    27  
    28  	// Override ioutil.ReadDir to inject error.
    29  	ioutilReadDir = func(dirname string) ([]os.FileInfo, error) {
    30  		return nil, testError
    31  	}
    32  
    33  	_, err := HostDevices()
    34  	if err != testError {
    35  		t.Fatalf("Unexpected error %v, expected %v", err, testError)
    36  	}
    37  }
    38  
    39  func TestHostDevicesIoutilReadDirDeepFailure(t *testing.T) {
    40  	testError := errors.New("test error")
    41  	called := false
    42  
    43  	// Override ioutil.ReadDir to inject error after the first call.
    44  	ioutilReadDir = func(dirname string) ([]os.FileInfo, error) {
    45  		if called {
    46  			return nil, testError
    47  		}
    48  		called = true
    49  
    50  		// Provoke a second call.
    51  		fi, err := os.Lstat("/tmp")
    52  		if err != nil {
    53  			t.Fatalf("Unexpected error %v", err)
    54  		}
    55  
    56  		return []os.FileInfo{fi}, nil
    57  	}
    58  
    59  	_, err := HostDevices()
    60  	if err != testError {
    61  		t.Fatalf("Unexpected error %v, expected %v", err, testError)
    62  	}
    63  }