/
schemaLinks.go
138 lines (125 loc) · 4.63 KB
/
schemaLinks.go
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package tests
import (
"bytes"
"fmt"
"testing"
qt "github.com/frankban/quicktest"
"github.com/ipfs/go-cid"
"github.com/ipld/go-ipld-prime/codec/dagjson"
"github.com/ipld/go-ipld-prime/datamodel"
"github.com/ipld/go-ipld-prime/fluent"
"github.com/ipld/go-ipld-prime/linking"
cidlink "github.com/ipld/go-ipld-prime/linking/cid"
"github.com/ipld/go-ipld-prime/node/basicnode"
"github.com/ipld/go-ipld-prime/schema"
"github.com/ipld/go-ipld-prime/storage/memstore"
"github.com/ipld/go-ipld-prime/traversal"
"github.com/ipld/go-ipld-prime/traversal/selector"
"github.com/ipld/go-ipld-prime/traversal/selector/builder"
)
var store = memstore.Store{}
func encode(n datamodel.Node) (datamodel.Node, datamodel.Link) {
lp := cidlink.LinkPrototype{cid.Prefix{
Version: 1,
Codec: 0x0129,
MhType: 0x13,
MhLength: 4,
}}
lsys := cidlink.DefaultLinkSystem()
lsys.SetWriteStorage(&store)
lnk, err := lsys.Store(linking.LinkContext{}, lp, n)
if err != nil {
panic(err)
}
return n, lnk
}
func SchemaTestLinks(t *testing.T, engine Engine) {
ts := schema.TypeSystem{}
ts.Init()
ts.Accumulate(schema.SpawnInt("Int"))
ts.Accumulate(schema.SpawnString("String"))
ts.Accumulate(schema.SpawnList("ListOfStrings", "String", false))
ts.Accumulate(schema.SpawnLink("Link")) // &Any
ts.Accumulate(schema.SpawnLinkReference("IntLink", "Int")) // &Int
ts.Accumulate(schema.SpawnLinkReference("StringLink", "String")) // &String
ts.Accumulate(schema.SpawnLinkReference("ListOfStringsLink", "ListOfStrings")) // &ListOfStrings
ts.Accumulate(schema.SpawnStruct("LinkStruct",
[]schema.StructField{
schema.SpawnStructField("any", "Link", false, false),
schema.SpawnStructField("int", "IntLink", false, false),
schema.SpawnStructField("str", "StringLink", false, false),
schema.SpawnStructField("strlist", "ListOfStringsLink", false, false),
},
schema.SpawnStructRepresentationMap(map[string]string{}),
))
engine.Init(t, ts)
t.Run("typed linkage traversal", func(t *testing.T) {
_, intNodeLnk := func() (datamodel.Node, datamodel.Link) {
np := engine.PrototypeByName("Int")
nb := np.NewBuilder()
nb.AssignInt(101)
return encode(nb.Build())
}()
_, stringNodeLnk := encode(fluent.MustBuild(engine.PrototypeByName("String"), func(na fluent.NodeAssembler) {
na.AssignString("a string")
}))
_, listOfStringsNodeLnk := encode(fluent.MustBuildList(engine.PrototypeByName("ListOfStrings"), 3, func(la fluent.ListAssembler) {
la.AssembleValue().AssignString("s1")
la.AssembleValue().AssignString("s2")
la.AssembleValue().AssignString("s3")
}))
linkStructNode, _ := encode(fluent.MustBuildMap(engine.PrototypeByName("LinkStruct"), 4, func(ma fluent.MapAssembler) {
ma.AssembleEntry("any").AssignLink(stringNodeLnk)
ma.AssembleEntry("int").AssignLink(intNodeLnk)
ma.AssembleEntry("str").AssignLink(stringNodeLnk)
ma.AssembleEntry("strlist").AssignLink(listOfStringsNodeLnk)
}))
ssb := builder.NewSelectorSpecBuilder(basicnode.Prototype.Any)
ss := ssb.ExploreRecursive(selector.RecursionLimitDepth(3), ssb.ExploreUnion(
ssb.Matcher(),
ssb.ExploreAll(ssb.ExploreRecursiveEdge()),
))
s, err := ss.Selector()
qt.Check(t, err, qt.IsNil)
var order int
lsys := cidlink.DefaultLinkSystem()
lsys.SetReadStorage(&store)
err = traversal.Progress{
Cfg: &traversal.Config{
LinkSystem: lsys,
LinkTargetNodePrototypeChooser: func(lnk datamodel.Link, lnkCtx linking.LinkContext) (datamodel.NodePrototype, error) {
if tlnkNd, ok := lnkCtx.LinkNode.(schema.TypedLinkNode); ok {
return tlnkNd.LinkTargetNodePrototype(), nil
}
return basicnode.Prototype.Any, nil
},
},
}.WalkMatching(linkStructNode, s, func(prog traversal.Progress, n datamodel.Node) error {
buf := new(bytes.Buffer)
dagjson.Encode(n, buf)
fmt.Printf("Walked %d: %v\n", order, buf.String())
switch order {
case 0: // root
qt.Check(t, n.Prototype(), qt.Equals, engine.PrototypeByName("LinkStruct"))
case 1: // from an &Any
qt.Check(t, n.Prototype(), qt.Equals, basicnode.Prototype__String{})
case 2: // &Int
qt.Check(t, n.Prototype(), qt.Equals, engine.PrototypeByName("Int"))
case 3: // &String
qt.Check(t, n.Prototype(), qt.Equals, engine.PrototypeByName("String"))
case 4: // &ListOfStrings
qt.Check(t, n.Prototype(), qt.Equals, engine.PrototypeByName("ListOfStrings"))
case 5:
fallthrough
case 6:
fallthrough
case 7:
qt.Check(t, n.Prototype(), qt.Equals, engine.PrototypeByName("String"))
}
order++
return nil
})
qt.Check(t, err, qt.IsNil)
qt.Check(t, order, qt.Equals, 8)
})
}