Refactored invariant checking.
parent
a0a0963c49
commit
1b65aaf887
|
@ -5,7 +5,6 @@ package memfs
|
|||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
|
||||
"github.com/jacobsa/fuse"
|
||||
"github.com/jacobsa/fuse/fuseutil"
|
||||
|
@ -58,6 +57,11 @@ func NewMemFS(
|
|||
}
|
||||
|
||||
func (fs *memFS) checkInvariants() {
|
||||
// Check general inode invariants.
|
||||
for i := range fs.inodes {
|
||||
fs.inodes[i].checkInvariants()
|
||||
}
|
||||
|
||||
// Check reserved inodes.
|
||||
for i := 0; i < fuse.RootInodeID; i++ {
|
||||
var inode *inode = &fs.inodes[i]
|
||||
|
@ -67,27 +71,32 @@ func (fs *memFS) checkInvariants() {
|
|||
}
|
||||
|
||||
// Check the root inode.
|
||||
fs.inodes[fuse.RootInodeID].impl.(*dir)
|
||||
_ = fs.inodes[fuse.RootInodeID].impl.(*memDir)
|
||||
|
||||
// Check inodes, building our own set of free IDs.
|
||||
freeIDsEncountered := make(map[fuse.InodeID]struct{})
|
||||
for i := range fs.inodes {
|
||||
for i := fuse.RootInodeID + 1; i < len(fs.inodes); i++ {
|
||||
var inode *inode = &fs.inodes[i]
|
||||
if inode.impl == nil {
|
||||
freeIDsEncountered[i] = struct{}{}
|
||||
freeIDsEncountered[fuse.InodeID(i)] = struct{}{}
|
||||
continue
|
||||
}
|
||||
|
||||
// Check for known types.
|
||||
switch inode.impl.(type) {
|
||||
case *memFile:
|
||||
case *memDir:
|
||||
default:
|
||||
panic(fmt.Sprintf("Unknown inode type: %v", reflect.TypeOf(inode.impl)))
|
||||
}
|
||||
}
|
||||
|
||||
panic("TODO")
|
||||
// Check fs.freeInodes.
|
||||
if len(fs.freeInodes) != len(freeIDsEncountered) {
|
||||
panic(
|
||||
fmt.Sprintf(
|
||||
"Length mismatch: %v vs. %v",
|
||||
len(fs.freeInodes),
|
||||
len(freeIDsEncountered)))
|
||||
}
|
||||
|
||||
for _, id := range fs.freeInodes {
|
||||
if _, ok := freeIDsEncountered[id]; !ok {
|
||||
panic(fmt.Sprintf("Unexected free inode ID: %v", id))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (fs *memFS) Init(
|
||||
|
|
|
@ -3,6 +3,11 @@
|
|||
|
||||
package memfs
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
)
|
||||
|
||||
// Common attributes for files and directories.
|
||||
//
|
||||
// TODO(jacobsa): Add tests for interacting with a file/directory after it has
|
||||
|
@ -15,3 +20,14 @@ type inode struct {
|
|||
// INVARIANT: impl is nil, or of type *memFile or *memDir
|
||||
impl interface{}
|
||||
}
|
||||
|
||||
func (inode *inode) checkInvariants() {
|
||||
switch inode.impl.(type) {
|
||||
case nil:
|
||||
case *memFile:
|
||||
case *memDir:
|
||||
default:
|
||||
panic(
|
||||
fmt.Sprintf("Unexpected inode impl type: %v", reflect.TypeOf(inode.impl)))
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue