package vfstest import ( "io" "io/ioutil" "testing" "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) } 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") }