rclone/vfs/vfstest/read.go
Nick Craig-Wood fd39cbc193 vfstests: move functional tests from mountlib and make them work with VFS
The tests are now run for the mount commands and for the plain VFS.

This makes the tests much easier to debug when running with a VFS than
through a mount.
2020-04-20 10:42:33 +01:00

126 lines
2.8 KiB
Go

package vfstest
import (
"io"
"io/ioutil"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
// TestReadByByte reads by byte including don't read any bytes
func TestReadByByte(t *testing.T) {
run.skipIfNoFUSE(t)
var data = []byte("hellohello")
run.createFile(t, "testfile", string(data))
run.checkDir(t, "testfile 10")
for i := 0; i < len(data); i++ {
fd, err := run.os.Open(run.path("testfile"))
assert.NoError(t, err)
for j := 0; j < i; j++ {
buf := make([]byte, 1)
n, err := io.ReadFull(fd, buf)
assert.NoError(t, err)
assert.Equal(t, 1, n)
assert.Equal(t, buf[0], data[j])
}
err = fd.Close()
assert.NoError(t, err)
}
time.Sleep(100 * time.Millisecond) // FIXME wait for Release
run.rm(t, "testfile")
}
// TestReadChecksum checks the checksum reading is working
func TestReadChecksum(t *testing.T) {
run.skipIfNoFUSE(t)
// create file big enough so we exceed any single FUSE read
// request
b := make([]rune, 3*128*1024)
for i := range b {
b[i] = 'r'
}
run.createFile(t, "bigfile", string(b))
// The hash comparison would fail in Flush, if we did not
// ensure we read the whole file
fd, err := run.os.Open(run.path("bigfile"))
assert.NoError(t, err)
buf := make([]byte, 10)
_, err = io.ReadFull(fd, buf)
assert.NoError(t, err)
err = fd.Close()
assert.NoError(t, err)
// The hash comparison would fail, because we only read parts
// of the file
fd, err = run.os.Open(run.path("bigfile"))
assert.NoError(t, err)
// read at start
_, err = io.ReadFull(fd, buf)
assert.NoError(t, err)
// read at end
_, err = fd.Seek(int64(len(b)-len(buf)), io.SeekStart)
assert.NoError(t, err)
_, err = io.ReadFull(fd, buf)
assert.NoError(t, err)
// ensure we don't compare hashes
err = fd.Close()
assert.NoError(t, err)
run.rm(t, "bigfile")
}
// TestReadSeek test seeking
func TestReadSeek(t *testing.T) {
run.skipIfNoFUSE(t)
var data = []byte("helloHELLO")
run.createFile(t, "testfile", string(data))
run.checkDir(t, "testfile 10")
fd, err := run.os.Open(run.path("testfile"))
assert.NoError(t, err)
// Seek to half way
_, err = fd.Seek(5, io.SeekStart)
assert.NoError(t, err)
buf, err := ioutil.ReadAll(fd)
assert.NoError(t, err)
assert.Equal(t, buf, []byte("HELLO"))
// Test seeking to the end
_, err = fd.Seek(10, io.SeekStart)
assert.NoError(t, err)
buf, err = ioutil.ReadAll(fd)
assert.NoError(t, err)
assert.Equal(t, buf, []byte(""))
// Test seeking beyond the end
_, err = fd.Seek(1000000, io.SeekStart)
assert.NoError(t, err)
buf, err = ioutil.ReadAll(fd)
assert.NoError(t, err)
assert.Equal(t, buf, []byte(""))
// Now back to the start
_, err = fd.Seek(0, io.SeekStart)
assert.NoError(t, err)
buf, err = ioutil.ReadAll(fd)
assert.NoError(t, err)
assert.Equal(t, buf, []byte("helloHELLO"))
err = fd.Close()
assert.NoError(t, err)
run.rm(t, "testfile")
}