mirror of https://github.com/vbatts/imgsrv.git
45 lines
744 B
Go
45 lines
744 B
Go
package txn
|
|
|
|
import (
|
|
"fmt"
|
|
"labix.org/v2/mgo/bson"
|
|
. "launchpad.net/gocheck"
|
|
)
|
|
|
|
type TarjanSuite struct{}
|
|
|
|
var _ = Suite(TarjanSuite{})
|
|
|
|
func bid(n int) bson.ObjectId {
|
|
return bson.ObjectId(fmt.Sprintf("%024d", n))
|
|
}
|
|
|
|
func bids(ns ...int) (ids []bson.ObjectId) {
|
|
for _, n := range ns {
|
|
ids = append(ids, bid(n))
|
|
}
|
|
return
|
|
}
|
|
|
|
func (TarjanSuite) TestExample(c *C) {
|
|
successors := map[bson.ObjectId][]bson.ObjectId{
|
|
bid(1): bids(2),
|
|
bid(2): bids(1, 5),
|
|
bid(3): bids(4),
|
|
bid(4): bids(3, 5),
|
|
bid(5): bids(6),
|
|
bid(6): bids(7),
|
|
bid(7): bids(8),
|
|
bid(8): bids(6, 9),
|
|
bid(9): bids(),
|
|
}
|
|
|
|
c.Assert(tarjanSort(successors), DeepEquals, [][]bson.ObjectId{
|
|
bids(9),
|
|
bids(8, 7, 6),
|
|
bids(5),
|
|
bids(2, 1),
|
|
bids(4, 3),
|
|
})
|
|
}
|