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vfs_test.go
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vfs_test.go
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package vfs
import (
"embed"
"github.com/spf13/afero"
"github.com/stretchr/testify/assert"
"syscall"
"testing"
)
//go:embed tests
var embedFs embed.FS
func TestMount(t *testing.T) {
var err error
vfs := New()
//invalid args
assert.Error(t, vfs.Mount("", afero.NewMemMapFs()))
assert.Error(t, vfs.Mount("abc", afero.NewMemMapFs()))
assert.Error(t, vfs.Mount("/", nil))
assert.ErrorIs(t, vfs.Mount("/", vfs), ErrRecursive)
memFsRoot := afero.NewMemMapFs()
memFsA := afero.NewMemMapFs()
// mount
assert.NoError(t, vfs.Mount("/", memFsRoot))
assert.NoError(t, vfs.Mount("/a", memFsA))
assert.NoError(t, vfs.Mount("/a/b", afero.NewMemMapFs()))
assert.NoError(t, vfs.Mount("/a/b/c", afero.FromIOFS{FS: embedFs}))
assert.NoError(t, vfs.Mount("/b/c/d", afero.NewMemMapFs()))
//test find mount
{
_, mfs, unroot := vfs.findMountPoint("/a.txt")
assert.Equal(t, memFsRoot, mfs)
assert.Equal(t, "a.txt", unroot)
_, mfs, unroot = vfs.findMountPoint("/bc")
assert.Equal(t, memFsRoot, mfs)
assert.Equal(t, "bc", unroot)
_, mfs, unroot = vfs.findMountPoint("/a/no")
assert.Equal(t, memFsA, mfs)
assert.Equal(t, "no", unroot)
_, mfs, unroot = vfs.findMountPoint("/a/no/no")
assert.Equal(t, memFsA, mfs)
assert.Equal(t, "no/no", unroot)
_, mfs, unroot = vfs.findMountPoint("/a")
assert.Equal(t, memFsA, mfs)
assert.Equal(t, "", unroot)
}
{
exist, err := afero.Exists(vfs, "/a/b/c/tests/embed.txt")
assert.NoError(t, err)
assert.True(t, exist)
}
osFs := afero.NewBasePathFs(afero.NewOsFs(), "./temp")
assert.NoError(t, osFs.MkdirAll(".", 0777))
defer func() {
assert.NoError(t, osFs.RemoveAll("."))
}()
assert.NoError(t, vfs.Mount("/e", osFs))
_, err = vfs.Create("/a/b/c/1.txt")
//read only
assert.Error(t, err)
f2, err := vfs.Create("/e/2.txt")
assert.NoError(t, err)
defer func() {
assert.NoError(t, f2.Close())
}()
exist, err := afero.Exists(vfs, "/e/2.txt")
assert.NoError(t, err)
assert.True(t, exist)
text := "hello world!"
_, err = f2.WriteString(text)
assert.NoError(t, err)
err = vfs.MkdirAll("/f/g", 0777)
assert.NoError(t, err)
err = vfs.MkdirAll("/e/f/g", 0777)
assert.NoError(t, err)
//multiple mount osFs
err = vfs.Mount("/h", osFs)
assert.NoError(t, err)
basePathFs := afero.NewBasePathFs(vfs, "/h")
err = basePathFs.MkdirAll("/a/b/c", 0777)
assert.NoError(t, err)
exist, err = afero.Exists(osFs, "/a/b/c")
assert.NoError(t, err)
assert.True(t, exist)
}
func TestUnmount(t *testing.T) {
vfs := New()
assert.NoError(t, vfs.Mount("/", afero.NewMemMapFs()))
assert.NoError(t, vfs.Mount("/a", afero.NewMemMapFs()))
assert.NoError(t, vfs.Unmount("/a", nil))
fs := afero.NewMemMapFs()
assert.NoError(t, vfs.Mount("/b", fs))
assert.NoError(t, vfs.Unmount("", fs))
assert.NoError(t, vfs.Mount("/c", afero.NewMemMapFs()))
var err error
_, err = vfs.Create("/c/1.txt")
assert.NoError(t, err)
mp, _, _ := vfs.findMountPoint("/c/1.txt")
assert.Equal(t, int32(0), mp.openCount)
_, err = vfs.Open("/c/1.txt")
assert.NoError(t, err)
mp, _, _ = vfs.findMountPoint("/c/1.txt")
assert.Equal(t, int32(1), mp.openCount)
assert.ErrorIs(t, vfs.Unmount("/c", nil), syscall.EBUSY)
assert.ErrorIs(t, vfs.Unmount("/non-exist", nil), syscall.ENOENT)
}