Function TestWriteFileHandleReadonly

vfs/write_test.go:33–90

Test write when underlying storage is readonly, must be run as non-root

(t *testing.T)

// Test write when underlying storage is readonly, must be run as non-root
func TestWriteFileHandleReadonly(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skipf("Skipping test on %s", runtime.GOOS)
	}
	if *fstest.RemoteName != "" {
		t.Skip("Skipping test on non local remote")
	}
	r, vfs, fh := writeHandleCreate(t)

	// Name
	assert.Equal(t, "file1", fh.Name())

	// Write a file, so underlying remote will be created
	_, err := fh.Write([]byte("hello"))
	assert.NoError(t, err)

	err = fh.Close()
	assert.NoError(t, err)

	var info os.FileInfo
	info, err = os.Stat(r.FremoteName)
	assert.NoError(t, err)

	// Remove write permission
	oldMode := info.Mode()
	err = os.Chmod(r.FremoteName, oldMode^(oldMode&0222))
	assert.NoError(t, err)

	var h Handle
	h, err = vfs.OpenFile("file2", os.O_WRONLY|os.O_CREATE, 0777)
	require.NoError(t, err)

	var ok bool
	fh, ok = h.(*WriteFileHandle)
	require.True(t, ok)

	// error is propagated to Close()
	_, err = fh.Write([]byte("hello"))
	assert.NoError(t, err)

	err = fh.Close()
	assert.NotNil(t, err)

	// Remove should fail
	err = vfs.Remove("file1")
	assert.NotNil(t, err)

	// Only file1 should exist
	_, err = vfs.Stat("file1")
	assert.NoError(t, err)

	_, err = vfs.Stat("file2")
	assert.Equal(t, true, errors.Is(err, os.ErrNotExist))

	// Restore old permission
	err = os.Chmod(r.FremoteName, oldMode)
	assert.NoError(t, err)
}