vfs: fix tests for backends which can't upload 0 length files

vfs/read_write_test.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/ncw/rclone/fs"
 	"github.com/ncw/rclone/fstest"
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -416,6 +417,10 @@ func TestRWFileHandleWriteNoWrite(t *testing.T) {
 
 	// Close the file without writing to it
 	err := fh.Close()
+	if errors.Cause(err) == fs.ErrorCantUploadEmptyFiles {
+		t.Logf("skipping test: %v", err)
+		return
+	}
 	assert.NoError(t, err)
 
 	// Create a different file (not in the cache)

vfs/vfs_test.go

@@ -9,7 +9,9 @@ import (
 	"testing"
 
 	_ "github.com/ncw/rclone/backend/all" // import all the backends
+	"github.com/ncw/rclone/fs"
 	"github.com/ncw/rclone/fstest"
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -223,7 +225,10 @@ func TestVFSOpenFile(t *testing.T) {
 	fd, err = vfs.OpenFile("dir/new_file.txt", os.O_WRONLY|os.O_CREATE, 0777)
 	require.NoError(t, err)
 	assert.NotNil(t, fd)
-	require.NoError(t, fd.Close())
+	err = fd.Close()
+	if errors.Cause(err) != fs.ErrorCantUploadEmptyFiles {
+		require.NoError(t, err)
+	}
 
 	fd, err = vfs.OpenFile("not found/new_file.txt", os.O_WRONLY|os.O_CREATE, 0777)
 	assert.Equal(t, os.ErrNotExist, err)

vfs/write_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/ncw/rclone/fs"
 	"github.com/ncw/rclone/fstest"
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -114,8 +115,11 @@ func TestWriteFileHandleMethods(t *testing.T) {
 	// it even if we don't write to it
 	h, err = vfs.OpenFile("file1", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0777)
 	require.NoError(t, err)
-	assert.NoError(t, h.Close())
+	err = h.Close()
-	checkListing(t, root, []string{"file1,0,false"})
+	if errors.Cause(err) != fs.ErrorCantUploadEmptyFiles {
+		assert.NoError(t, err)
+		checkListing(t, root, []string{"file1,0,false"})
+	}
 
 	// Check opening the file with O_TRUNC and writing does work
 	h, err = vfs.OpenFile("file1", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0777)
@@ -213,6 +217,10 @@ func TestWriteFileHandleRelease(t *testing.T) {
 
 	// Check Release closes file
 	err := fh.Release()
+	if errors.Cause(err) == fs.ErrorCantUploadEmptyFiles {
+		t.Logf("skipping test: %v", err)
+		return
+	}
 	assert.NoError(t, err)
 	assert.True(t, fh.closed)