github.com/scaleoutsean/fusego@v0.0.0-20220224074057-4a6429e46bb8/mount_test.go (about)

     1  package fuse_test
     2  
     3  import (
     4  	"context"
     5  	"io/ioutil"
     6  	"os"
     7  	"path"
     8  	"runtime"
     9  	"strings"
    10  	"testing"
    11  
    12  	"github.com/scaleoutsean/fusego"
    13  	"github.com/scaleoutsean/fusego/fuseops"
    14  	"github.com/scaleoutsean/fusego/fuseutil"
    15  )
    16  
    17  ////////////////////////////////////////////////////////////////////////
    18  // minimalFS
    19  ////////////////////////////////////////////////////////////////////////
    20  
    21  // A minimal fuseutil.FileSystem that can successfully mount but do nothing
    22  // else.
    23  type minimalFS struct {
    24  	fuseutil.NotImplementedFileSystem
    25  }
    26  
    27  func (fs *minimalFS) StatFS(
    28  	ctx context.Context,
    29  	op *fuseops.StatFSOp) error {
    30  	return nil
    31  }
    32  
    33  ////////////////////////////////////////////////////////////////////////
    34  // Tests
    35  ////////////////////////////////////////////////////////////////////////
    36  
    37  func TestSuccessfulMount(t *testing.T) {
    38  	ctx := context.Background()
    39  
    40  	// Set up a temporary directory.
    41  	dir, err := ioutil.TempDir("", "mount_test")
    42  	if err != nil {
    43  		t.Fatalf("ioutil.TempDir: %v", err)
    44  	}
    45  
    46  	defer os.RemoveAll(dir)
    47  
    48  	// Mount.
    49  	fs := &minimalFS{}
    50  	mfs, err := fuse.Mount(
    51  		dir,
    52  		fuseutil.NewFileSystemServer(fs),
    53  		&fuse.MountConfig{})
    54  
    55  	if err != nil {
    56  		t.Fatalf("fuse.Mount: %v", err)
    57  	}
    58  
    59  	defer func() {
    60  		if err := mfs.Join(ctx); err != nil {
    61  			t.Errorf("Joining: %v", err)
    62  		}
    63  	}()
    64  
    65  	defer fuse.Unmount(mfs.Dir())
    66  }
    67  
    68  func TestNonEmptyMountPoint(t *testing.T) {
    69  	ctx := context.Background()
    70  
    71  	// osxfuse appears to be happy to mount over a non-empty mount point.
    72  	//
    73  	// We leave this test in for Linux, because it tickles the behavior of
    74  	// fusermount writing to stderr and exiting with an error code. We want to
    75  	// make sure that a descriptive error makes it back to the user.
    76  	if runtime.GOOS == "darwin" {
    77  		return
    78  	}
    79  
    80  	// Set up a temporary directory.
    81  	dir, err := ioutil.TempDir("", "mount_test")
    82  	if err != nil {
    83  		t.Fatalf("ioutil.TempDir: %v", err)
    84  	}
    85  
    86  	defer os.RemoveAll(dir)
    87  
    88  	// Add a file within it.
    89  	err = ioutil.WriteFile(path.Join(dir, "foo"), []byte{}, 0600)
    90  	if err != nil {
    91  		t.Fatalf("ioutil.WriteFile: %v", err)
    92  	}
    93  
    94  	// Attempt to mount.
    95  	fs := &minimalFS{}
    96  	mfs, err := fuse.Mount(
    97  		dir,
    98  		fuseutil.NewFileSystemServer(fs),
    99  		&fuse.MountConfig{})
   100  
   101  	if err == nil {
   102  		fuse.Unmount(mfs.Dir())
   103  		mfs.Join(ctx)
   104  		t.Fatal("fuse.Mount returned nil")
   105  	}
   106  
   107  	const want = "not empty"
   108  	if got := err.Error(); !strings.Contains(got, want) {
   109  		t.Errorf("Unexpected error: %v", got)
   110  	}
   111  }
   112  
   113  func TestNonexistentMountPoint(t *testing.T) {
   114  	ctx := context.Background()
   115  
   116  	// Set up a temporary directory.
   117  	dir, err := ioutil.TempDir("", "mount_test")
   118  	if err != nil {
   119  		t.Fatalf("ioutil.TempDir: %v", err)
   120  	}
   121  
   122  	defer os.RemoveAll(dir)
   123  
   124  	// Attempt to mount into a sub-directory that doesn't exist.
   125  	fs := &minimalFS{}
   126  	mfs, err := fuse.Mount(
   127  		path.Join(dir, "foo"),
   128  		fuseutil.NewFileSystemServer(fs),
   129  		&fuse.MountConfig{})
   130  
   131  	if err == nil {
   132  		fuse.Unmount(mfs.Dir())
   133  		mfs.Join(ctx)
   134  		t.Fatal("fuse.Mount returned nil")
   135  	}
   136  
   137  	const want = "no such file"
   138  	if got := err.Error(); !strings.Contains(got, want) {
   139  		t.Errorf("Unexpected error: %v", got)
   140  	}
   141  }