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5d6b8141ec
As of Go 1.16, the same functionality is now provided by package io or package os, and those implementations should be preferred in new code.
124 lines
2.7 KiB
Go
124 lines
2.7 KiB
Go
package vfstest
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import (
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"io"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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// TestReadByByte reads by byte including don't read any bytes
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func TestReadByByte(t *testing.T) {
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run.skipIfNoFUSE(t)
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var data = []byte("hellohello")
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run.createFile(t, "testfile", string(data))
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run.checkDir(t, "testfile 10")
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for i := 0; i < len(data); i++ {
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fd, err := run.os.Open(run.path("testfile"))
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assert.NoError(t, err)
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for j := 0; j < i; j++ {
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buf := make([]byte, 1)
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n, err := io.ReadFull(fd, buf)
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assert.NoError(t, err)
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assert.Equal(t, 1, n)
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assert.Equal(t, buf[0], data[j])
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}
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err = fd.Close()
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assert.NoError(t, err)
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}
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run.rm(t, "testfile")
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}
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// TestReadChecksum checks the checksum reading is working
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func TestReadChecksum(t *testing.T) {
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run.skipIfNoFUSE(t)
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// create file big enough so we exceed any single FUSE read
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// request
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b := make([]rune, 3*128*1024)
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for i := range b {
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b[i] = 'r'
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}
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run.createFile(t, "bigfile", string(b))
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// The hash comparison would fail in Flush, if we did not
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// ensure we read the whole file
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fd, err := run.os.Open(run.path("bigfile"))
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assert.NoError(t, err)
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buf := make([]byte, 10)
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_, err = io.ReadFull(fd, buf)
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assert.NoError(t, err)
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err = fd.Close()
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assert.NoError(t, err)
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// The hash comparison would fail, because we only read parts
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// of the file
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fd, err = run.os.Open(run.path("bigfile"))
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assert.NoError(t, err)
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// read at start
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_, err = io.ReadFull(fd, buf)
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assert.NoError(t, err)
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// read at end
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_, err = fd.Seek(int64(len(b)-len(buf)), io.SeekStart)
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assert.NoError(t, err)
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_, err = io.ReadFull(fd, buf)
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assert.NoError(t, err)
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// ensure we don't compare hashes
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err = fd.Close()
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assert.NoError(t, err)
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run.rm(t, "bigfile")
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}
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// TestReadSeek test seeking
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func TestReadSeek(t *testing.T) {
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run.skipIfNoFUSE(t)
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var data = []byte("helloHELLO")
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run.createFile(t, "testfile", string(data))
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run.checkDir(t, "testfile 10")
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fd, err := run.os.Open(run.path("testfile"))
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assert.NoError(t, err)
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// Seek to half way
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_, err = fd.Seek(5, io.SeekStart)
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assert.NoError(t, err)
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buf, err := io.ReadAll(fd)
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assert.NoError(t, err)
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assert.Equal(t, buf, []byte("HELLO"))
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// Test seeking to the end
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_, err = fd.Seek(10, io.SeekStart)
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assert.NoError(t, err)
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buf, err = io.ReadAll(fd)
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assert.NoError(t, err)
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assert.Equal(t, buf, []byte(""))
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// Test seeking beyond the end
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_, err = fd.Seek(1000000, io.SeekStart)
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assert.NoError(t, err)
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buf, err = io.ReadAll(fd)
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assert.NoError(t, err)
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assert.Equal(t, buf, []byte(""))
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// Now back to the start
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_, err = fd.Seek(0, io.SeekStart)
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assert.NoError(t, err)
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buf, err = io.ReadAll(fd)
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assert.NoError(t, err)
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assert.Equal(t, buf, []byte("helloHELLO"))
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err = fd.Close()
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assert.NoError(t, err)
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run.rm(t, "testfile")
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}
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