test(invocation): add command.Covers and subject consistency tests

Also improve the maintainability of the tests by a) providing a set of fixed Personas
and then generating a slew of valid delegation tokens, invalid delegation tokens
and proof-chains thereof.

did/didtest/crypto.go

@@ -0,0 +1,149 @@
+// Package didtest provides Personas that can be used for testing.  Each
+// Persona has a name, crypto.PrivKey and associated crypto.PubKey and
+// did.DID.
+package didtest
+
+import (
+	"sync"
+	"testing"
+
+	"github.com/libp2p/go-libp2p/core/crypto"
+	"github.com/stretchr/testify/require"
+	"github.com/ucan-wg/go-ucan/did"
+)
+
+const (
+	alicePrivKeyCfg = "CAESQHdNJLBBiuc1AdwPHBkubB2KS1p0cv2JEF7m8tfwtrcm5ajaYPm+XmVCmtcHOF2lGDlmaiDA7emfwD3IrcyES0M="
+	bobPrivKeyCfg   = "CAESQHBz+AIop1g+9iBDj+ufUc/zm9/ry7c6kDFO8Wl/D0+H63V9hC6s9l4npf3pYEFCjBtlR0AMNWMoFQKSlYNKo20="
+	carolPrivKeyCfg = "CAESQPrCgkcHnYFXDT9AlAydhPECBEivEuuVx9dJxLjVvDTmJIVNivfzg6H4mAiPfYS+5ryVVUZTHZBzvMuvvvG/Ks0="
+	danPrivKeyCfg   = "CAESQCgNhzofKhC+7hW6x+fNd7iMPtQHeEmKRhhlduf/I7/TeOEFYAEflbJ0sAhMeDJ/HQXaAvsWgHEbJ3ZLhP8q2B0="
+	erinPrivKeyCfg  = "CAESQKhCJo5UBpQcthko8DKMFsbdZ+qqQ5oc01CtLCqrE90dF2GfRlrMmot3WPHiHGCmEYi5ZMEHuiSI095e/6O4Bpw="
+	frankPrivKeyCfg = "CAESQDlXPKsy3jHh7OWTWQqyZF95Ueac5DKo7xD0NOBE5F2BNr1ZVxRmJ2dBELbOt8KP9sOACcO9qlCB7uMA1UQc7sk="
+)
+
+// Persona is a generic participant used for cryptographic testing.
+type Persona int
+
+// The provided  Personas were selected from the first few generic
+// participants listed in this [table].
+//
+// [table]: https://en.wikipedia.org/wiki/Alice_and_Bob#Cryptographic_systems
+const (
+	PersonaAlice Persona = iota
+	PersonaBob
+	PersonaCarol
+	PersonaDan
+	PersonaErin
+	PersonaFrank
+)
+
+var (
+	once     sync.Once
+	privKeys = make(map[Persona]crypto.PrivKey, 6)
+	err      error
+)
+
+// DID returns a did.DID based on the Persona's Ed25519 public key.
+func (p Persona) DID(t *testing.T) did.DID {
+	t.Helper()
+
+	did, err := did.FromPrivKey(p.PrivKey(t))
+	require.NoError(t, err)
+
+	return did
+}
+
+// Name returns the username of the Persona.
+func (p Persona) Name(t *testing.T) string {
+	t.Helper()
+
+	name, ok := map[Persona]string{
+		PersonaAlice: "Alice",
+		PersonaBob:   "Bob",
+		PersonaCarol: "Carol",
+		PersonaDan:   "Dan",
+		PersonaErin:  "Erin",
+		PersonaFrank: "Frank",
+	}[p]
+	if !ok {
+		t.Fatal("Unknown persona:", p)
+	}
+
+	return name
+}
+
+// PrivKey returns the Ed25519 private key for the Persona.
+func (p Persona) PrivKey(t *testing.T) crypto.PrivKey {
+	t.Helper()
+
+	once.Do(func() {
+		for persona, privKeyCfg := range privKeyCfgs(t) {
+			privKeyMar, err := crypto.ConfigDecodeKey(privKeyCfg)
+			if err != nil {
+				return
+			}
+
+			privKey, err := crypto.UnmarshalPrivateKey(privKeyMar)
+			if err != nil {
+				return
+			}
+
+			privKeys[persona] = privKey
+		}
+	})
+	require.NoError(t, err)
+
+	return privKeys[p]
+}
+
+// PrivKeyConfig returns the marshaled and encoded Ed25519 private key
+// for the Persona.
+func (p Persona) PrivKeyConfig(t *testing.T) string {
+	t.Helper()
+
+	return privKeyCfgs(t)[p]
+}
+
+// PubKey returns the Ed25519 public key for the Persona.
+func (p Persona) PubKey(t *testing.T) crypto.PubKey {
+	t.Helper()
+
+	return p.PrivKey(t).GetPublic()
+}
+
+// PubKeyConfig returns the marshaled and encoded Ed25519 public key
+// for the Persona.
+func (p Persona) PubKeyConfig(t *testing.T) string {
+	pubKeyMar, err := crypto.MarshalPublicKey(p.PrivKey(t).GetPublic())
+	require.NoError(t, err)
+
+	return crypto.ConfigEncodeKey(pubKeyMar)
+}
+
+func privKeyCfgs(t *testing.T) map[Persona]string {
+	t.Helper()
+
+	return map[Persona]string{
+		PersonaAlice: alicePrivKeyCfg,
+		PersonaBob:   bobPrivKeyCfg,
+		PersonaCarol: carolPrivKeyCfg,
+		PersonaDan:   danPrivKeyCfg,
+		PersonaErin:  erinPrivKeyCfg,
+		PersonaFrank: frankPrivKeyCfg,
+	}
+}
+
+// Personas returns an (alphabetically) ordered list of the defined
+// Persona values.
+func Personas(t *testing.T) []Persona {
+	t.Helper()
+
+	return []Persona{
+		PersonaAlice,
+		PersonaBob,
+		PersonaCarol,
+		PersonaDan,
+		PersonaErin,
+		PersonaFrank,
+	}
+}

go.mod

@@ -3,6 +3,7 @@ module github.com/ucan-wg/go-ucan
 go 1.23
 
 require (
+	github.com/dave/jennifer v1.7.1
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0
 	github.com/ipfs/go-cid v0.4.1
 	github.com/ipld/go-ipld-prime v0.21.0

go.sum

@@ -1,5 +1,7 @@
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/dave/jennifer v1.7.1 h1:B4jJJDHelWcDhlRQxWeo0Npa/pYKBLrirAQoTN45txo=
+github.com/dave/jennifer v1.7.1/go.mod h1:nXbxhEmQfOZhWml3D1cDK5M1FLnMSozpbFN/m3RmGZc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

pkg/policy/policytest/policy.go

@@ -0,0 +1,20 @@
+// Package policytest provides values and functions that are useful when
+// testing code that relies on Policies.
+package policytest
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"github.com/ucan-wg/go-ucan/pkg/policy"
+)
+
+// EmptyPolicy provides a policy with no statements for testing purposes.
+func EmptyPolicy(t *testing.T) policy.Policy {
+	t.Helper()
+
+	pol, err := policy.FromDagJson("[]")
+	require.NoError(t, err)
+
+	return pol
+}

token/delegation/delegationtest/README.md

@@ -0,0 +1,5 @@
+# delegationtest
+
+See the package documentation for instructions on how to use the generated
+tokens as well as information on how to regenerate the code if changes have
+been made.

token/delegation/delegationtest/doc.go

@@ -0,0 +1,33 @@
+// Package delegationtest provides a set of pre-built delegation tokens
+// for a variety of test cases.
+//
+// For all delegation tokens, the name of the delegation token is the
+// Issuer appended with the Audience.  The tokens are generated so that
+// an invocation can be created for any didtest.Persona.
+//
+// Delegation proof-chain names contain each didtest.Persona name in
+// order starting with the root delegation (which will always be generated
+// by Alice.)  This is opposite of the list of cic.Cids that represent the
+// proof chain.
+//
+// For both the generated delegation tokens granted to Carol's Persona and
+// the proof chains containing Carol's delegations to Dan, if there is no
+// suffix, the proof chain will be deemed valid.  If there is a suffix, it
+// will consist of either the word "Valid" or "Invalid" and the name of the
+// field that has been altered.  Only optional fields will generate proof
+// chains with Valid suffixes.
+//
+// If changes are made to the list of Personas included in the chain, or
+// in the variants that are specified, the generated Go file and delegation
+// tokens stored in the data/ directory should be regenerated by running
+// the following command in this directory:
+//
+//	go test . -update
+//
+// Generated delegation Tokens are stored in the data/ directory and loaded
+// into the DelegationLoader on the first call to GetDelegationLoader.
+// Generated references to these tokens and the tokens themselves are
+// created in the token_gen.go file.  See /token/invocation/invocation_test.go
+// for an example of how these delegation tokens and proof-chains can
+// be used during testing.
+package delegationtest

token/delegation/delegationtest/generator_test.go

@@ -0,0 +1,224 @@
+package delegationtest
+
+import (
+	"os"
+	"path/filepath"
+	"slices"
+	"testing"
+	"time"
+
+	"github.com/dave/jennifer/jen"
+	"github.com/ipfs/go-cid"
+	"github.com/libp2p/go-libp2p/core/crypto"
+	"github.com/stretchr/testify/require"
+	"github.com/ucan-wg/go-ucan/did"
+	"github.com/ucan-wg/go-ucan/did/didtest"
+	"github.com/ucan-wg/go-ucan/pkg/command"
+	"github.com/ucan-wg/go-ucan/pkg/policy"
+	"github.com/ucan-wg/go-ucan/pkg/policy/policytest"
+	"github.com/ucan-wg/go-ucan/token/delegation"
+	"gotest.tools/v3/golden"
+)
+
+const (
+	tokenNamePrefix      = "Token"
+	proorChainNamePrefix = "Proof"
+)
+
+var constantNonce = []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b}
+
+// TestUpdate doesn't actually run a test but uses the Go testing library
+// to trigger generation of the delegation tokens and associated Go file.
+func TestUpdate(t *testing.T) {
+	if golden.FlagUpdate() {
+		update(t)
+	}
+}
+
+type newDelegationParams struct {
+	privKey crypto.PrivKey
+	aud     did.DID
+	sub     did.DID
+	cmd     command.Command
+	pol     policy.Policy
+	opts    []delegation.Option
+}
+
+type newDelegationParamsVariant func(*newDelegationParams)
+
+type token struct {
+	name string
+	id   cid.Cid
+}
+
+type proof struct {
+	name string
+	prf  []cid.Cid
+}
+
+type generator struct {
+	dlgs   []token
+	chains []proof
+}
+
+type acc struct {
+	name  string
+	chain []cid.Cid
+}
+
+type variant struct {
+	name    string
+	variant func(*newDelegationParams)
+}
+
+func noopVariant() variant {
+	return variant{
+		name:    "",
+		variant: func(_ *newDelegationParams) {},
+	}
+}
+
+func update(t *testing.T) {
+	t.Helper()
+
+	gen := &generator{}
+	gen.chainPersonas(t, didtest.Personas(t), acc{}, noopVariant())
+	gen.writeGoFile(t)
+}
+
+func (g *generator) chainPersonas(t *testing.T, personas []didtest.Persona, acc acc, vari variant) {
+	t.Helper()
+
+	acc.name += personas[0].Name(t)
+	g.createProofChain(t, acc.name+vari.name, acc.chain)
+
+	if len(personas) < 2 {
+		return
+	}
+
+	name := personas[0].Name(t) + personas[1].Name(t)
+
+	params := newDelegationParams{
+		privKey: personas[0].PrivKey(t),
+		aud:     personas[1].DID(t),
+		cmd:     NominalCommand,
+		pol:     policytest.EmptyPolicy(t),
+		opts: []delegation.Option{
+			delegation.WithSubject(didtest.PersonaAlice.DID(t)),
+			delegation.WithNonce(constantNonce),
+		},
+	}
+
+	// Create each nominal token and continue the chain
+	id := g.createDelegation(t, params, name, vari)
+	acc.chain = append(acc.chain, id)
+	g.chainPersonas(t, personas[1:], acc, vari)
+
+	// If the user is Carol, create variants for each invalid and/or optional
+	// parameter and also continue the chain
+	if personas[0] == didtest.PersonaCarol {
+		variants := []variant{
+			{name: "InvalidExpandedCommand", variant: func(p *newDelegationParams) {
+				p.cmd = ExpandedCommand
+			}},
+			{name: "ValidAttenuatedCommand", variant: func(p *newDelegationParams) {
+				p.cmd = AttenuatedCommand
+			}},
+			{name: "InvalidSubject", variant: func(p *newDelegationParams) {
+				p.opts = append(p.opts, delegation.WithSubject(didtest.PersonaBob.DID(t)))
+			}},
+			{name: "InvalidExpired", variant: func(p *newDelegationParams) {
+				p.opts = append(p.opts, delegation.WithExpiration(time.Now().Add(time.Second)))
+			}},
+			{name: "InvalidInactive", variant: func(p *newDelegationParams) {
+				nbf, err := time.Parse(time.RFC3339, "2070-01-01T00:00:00Z")
+				require.NoError(t, err)
+
+				p.opts = append(p.opts, delegation.WithNotBefore(nbf))
+			}},
+		}
+
+		// Start a branch in the recursion for each of the variants
+		for _, v := range variants {
+			id := g.createDelegation(t, params, name, v)
+
+			// replace the previous Carol token id with the one from the variant
+			acc.chain[len(acc.chain)-1] = id
+			g.chainPersonas(t, personas[1:], acc, v)
+		}
+	}
+}
+
+func (g *generator) createDelegation(t *testing.T, params newDelegationParams, name string, vari variant) cid.Cid {
+	t.Helper()
+
+	vari.variant(&params)
+
+	tkn, err := delegation.New(params.privKey, params.aud, params.cmd, params.pol, params.opts...)
+	require.NoError(t, err)
+
+	data, id, err := tkn.ToSealed(params.privKey)
+	require.NoError(t, err)
+
+	require.NoError(t, os.WriteFile(filepath.Join(tokenDir, tokenNamePrefix+name+vari.name+tokenExt), data, 0o644))
+
+	g.dlgs = append(g.dlgs, token{
+		name: tokenNamePrefix + name + vari.name,
+		id:   id,
+	})
+
+	return id
+}
+
+func (g *generator) createProofChain(t *testing.T, name string, prf []cid.Cid) {
+	t.Helper()
+
+	if len(prf) < 1 {
+		return
+	}
+
+	clone := make([]cid.Cid, len(prf))
+	copy(clone, prf)
+
+	g.chains = append(g.chains, proof{
+		name: proorChainNamePrefix + name,
+		prf:  clone,
+	})
+}
+
+func (g *generator) writeGoFile(t *testing.T) {
+	t.Helper()
+
+	file := jen.NewFile("delegationtest")
+	file.HeaderComment("Code generated by delegationtest - DO NOT EDIT.")
+
+	refs := map[cid.Cid]string{}
+
+	for _, d := range g.dlgs {
+		refs[d.id] = d.name + "CID"
+
+		file.Var().Defs(
+			jen.Id(d.name+"CID").Op("=").Qual("github.com/ipfs/go-cid", "MustParse").Call(jen.Lit(d.id.String())),
+			jen.Id(d.name).Op("=").Id("mustGetDelegation").Call(jen.Id(d.name+"CID")),
+		)
+		file.Line()
+	}
+
+	for _, c := range g.chains {
+		g := jen.CustomFunc(jen.Options{
+			Multi:     true,
+			Separator: ",",
+			Close:     "\n",
+		}, func(g *jen.Group) {
+			slices.Reverse(c.prf)
+			for _, p := range c.prf {
+				g.Id(refs[p])
+			}
+		})
+
+		file.Var().Id(c.name).Op("=").Index().Qual("github.com/ipfs/go-cid", "Cid").Values(g)
+		file.Line()
+	}
+
+	require.NoError(t, file.Save("token_gen.go"))
+}

token/delegation/delegationtest/token.go

@@ -0,0 +1,120 @@
+package delegationtest
+
+import (
+	"embed"
+	"fmt"
+	"path/filepath"
+	"sync"
+
+	"github.com/ipfs/go-cid"
+	"github.com/ucan-wg/go-ucan/pkg/command"
+	"github.com/ucan-wg/go-ucan/token/delegation"
+	"github.com/ucan-wg/go-ucan/token/invocation"
+)
+
+const (
+	tokenDir = "data"
+	tokenExt = ".dagcbor"
+)
+
+var (
+	// ExpandedCommand is the parent of the NominalCommand and represents
+	// the cases where the delegation proof-chain or invocation token tries
+	// to increase the privileges granted by the root delegation token.
+	// Execution of this command is generally prohibited in tests.
+	ExpandedCommand = command.MustParse("/expanded")
+
+	// NominalCommand is the command used for most test tokens and proof-
+	// chains.  Execution of this command is generally allowed in tests.
+	NominalCommand = ExpandedCommand.Join("nominal")
+
+	// AttenuatedCommand is a sub-command of the NominalCommand.  Execution
+	// of this command is generally allowed in tests.
+	AttenuatedCommand = NominalCommand.Join("attenuated")
+)
+
+// ProofEmpty provides an empty proof chain for testing purposes.
+var ProofEmpty = []cid.Cid{}
+
+//go:embed data
+var fs embed.FS
+
+var (
+	once sync.Once
+	ldr  invocation.DelegationLoader
+	err  error
+)
+
+var _ invocation.DelegationLoader = (*delegationLoader)(nil)
+
+type delegationLoader struct {
+	tokens map[cid.Cid]*delegation.Token
+}
+
+// GetDelegationLoader returns a singleton instance of a test
+// DelegationLoader containing all the tokens present in the data/
+// directory.
+func GetDelegationLoader() (invocation.DelegationLoader, error) {
+	once.Do(func() {
+		ldr, err = loadDelegations()
+	})
+
+	return ldr, err
+}
+
+// GetDelegation implements invocation.DelegationLoader.
+func (l *delegationLoader) GetDelegation(id cid.Cid) (*delegation.Token, error) {
+	tkn, ok := l.tokens[id]
+	if !ok {
+		return nil, fmt.Errorf("%w: CID %s", invocation.ErrMissingDelegation, id.String())
+	}
+
+	return tkn, nil
+}
+
+func loadDelegations() (invocation.DelegationLoader, error) {
+	dirEntries, err := fs.ReadDir("data")
+	if err != nil {
+		return nil, err
+	}
+
+	tkns := make(map[cid.Cid]*delegation.Token, len(dirEntries))
+
+	for _, dirEntry := range dirEntries {
+		data, err := fs.ReadFile(filepath.Join(tokenDir, dirEntry.Name()))
+		if err != nil {
+			return nil, err
+		}
+
+		tkn, id, err := delegation.FromSealed(data)
+		if err != nil {
+			return nil, err
+		}
+
+		tkns[id] = tkn
+	}
+
+	return &delegationLoader{
+		tokens: tkns,
+	}, nil
+}
+
+// GetDelegation is a shortcut that gets (or creates) the DelegationLoader
+// and attempts to return the token referenced by the provided CID.
+func GetDelegation(id cid.Cid) (*delegation.Token, error) {
+	ldr, err := GetDelegationLoader()
+	if err != nil {
+		return nil, err
+	}
+
+	return ldr.GetDelegation(id)
+}
+
+func mustGetDelegation(id cid.Cid) *delegation.Token {
+	tkn, err := GetDelegation(id)
+	if err != nil {
+		panic(err)
+	}
+
+	return tkn
+}

token/delegation/delegationtest/token_gen.go

@@ -0,0 +1,240 @@
+// Code generated by delegationtest - DO NOT EDIT.
+
+package delegationtest
+
+import gocid "github.com/ipfs/go-cid"
+
+var (
+	TokenAliceBobCID = gocid.MustParse("bafyreicidrwvmac5lvjypucgityrtjsknojraio7ujjli4r5eyby66wjzm")
+	TokenAliceBob    = mustGetDelegation(TokenAliceBobCID)
+)
+
+var (
+	TokenBobCarolCID = gocid.MustParse("bafyreihxv2uhq43oxllzs2xfvxst7wtvvvl7pohb2chcz6hjvfv2ntea5u")
+	TokenBobCarol    = mustGetDelegation(TokenBobCarolCID)
+)
+
+var (
+	TokenCarolDanCID = gocid.MustParse("bafyreihclsgiroazq3heqdswvj2cafwqbpboicq7immo65scl7ahktpsdq")
+	TokenCarolDan    = mustGetDelegation(TokenCarolDanCID)
+)
+
+var (
+	TokenDanErinCID = gocid.MustParse("bafyreicja6ihewy64p3ake56xukotafjlkh4uqep2qhj52en46zzfwby3e")
+	TokenDanErin    = mustGetDelegation(TokenDanErinCID)
+)
+
+var (
+	TokenErinFrankCID = gocid.MustParse("bafyreicjlx3lobxm6hl5s4htd4ydwkkqeiou6rft4rnvulfdyoew565vka")
+	TokenErinFrank    = mustGetDelegation(TokenErinFrankCID)
+)
+
+var (
+	TokenCarolDanInvalidExpandedCommandCID = gocid.MustParse("bafyreid3m3pk53gqgp5rlzqhvpedbwsqbidqlp4yz64vknwbzj7bxrmsr4")
+	TokenCarolDanInvalidExpandedCommand    = mustGetDelegation(TokenCarolDanInvalidExpandedCommandCID)
+)
+
+var (
+	TokenDanErinInvalidExpandedCommandCID = gocid.MustParse("bafyreifn4sy5onwajx3kqvot5mib6m6xarzrqjozqbzgmzpmc5ox3g2uzm")
+	TokenDanErinInvalidExpandedCommand    = mustGetDelegation(TokenDanErinInvalidExpandedCommandCID)
+)
+
+var (
+	TokenErinFrankInvalidExpandedCommandCID = gocid.MustParse("bafyreidmpgd36jznmq42bs34o4qi3fcbrsh4idkg6ejahudejzwb76fwxe")
+	TokenErinFrankInvalidExpandedCommand    = mustGetDelegation(TokenErinFrankInvalidExpandedCommandCID)
+)
+
+var (
+	TokenCarolDanValidAttenuatedCommandCID = gocid.MustParse("bafyreiekhtm237vyapk3c6voeb5lnz54crebqdqi3x4wn4u4cbrrhzsqfe")
+	TokenCarolDanValidAttenuatedCommand    = mustGetDelegation(TokenCarolDanValidAttenuatedCommandCID)
+)
+
+var (
+	TokenDanErinValidAttenuatedCommandCID = gocid.MustParse("bafyreicrvzqferyy7rgo75l5rn6r2nl7zyeexxjmu3dm4ff7rn2coblj4y")
+	TokenDanErinValidAttenuatedCommand    = mustGetDelegation(TokenDanErinValidAttenuatedCommandCID)
+)
+
+var (
+	TokenErinFrankValidAttenuatedCommandCID = gocid.MustParse("bafyreie6fhspk53kplcc2phla3e7z7fzldlbmmpuwk6nbow5q6s2zjmw2q")
+	TokenErinFrankValidAttenuatedCommand    = mustGetDelegation(TokenErinFrankValidAttenuatedCommandCID)
+)
+
+var (
+	TokenCarolDanInvalidSubjectCID = gocid.MustParse("bafyreifgksz6756if42tnc6rqsnbaa2u3fdrveo7ek44lnj2d64d5sw26u")
+	TokenCarolDanInvalidSubject    = mustGetDelegation(TokenCarolDanInvalidSubjectCID)
+)
+
+var (
+	TokenDanErinInvalidSubjectCID = gocid.MustParse("bafyreibdwew5nypsxrm4fq73wu6hw3lgwwiolj3bi33xdrbgcf3ogm6fty")
+	TokenDanErinInvalidSubject    = mustGetDelegation(TokenDanErinInvalidSubjectCID)
+)
+
+var (
+	TokenErinFrankInvalidSubjectCID = gocid.MustParse("bafyreicr364mj3n7x4iyhcksxypelktcqkkw3ptg7ggxtqegw3p3mr6zc4")
+	TokenErinFrankInvalidSubject    = mustGetDelegation(TokenErinFrankInvalidSubjectCID)
+)
+
+var (
+	TokenCarolDanInvalidExpiredCID = gocid.MustParse("bafyreibgtlioorouqpwr6olk6boc3pprl5tx5xs6zpfnv3pvxtggueofii")
+	TokenCarolDanInvalidExpired    = mustGetDelegation(TokenCarolDanInvalidExpiredCID)
+)
+
+var (
+	TokenDanErinInvalidExpiredCID = gocid.MustParse("bafyreidhq3hjsfrucbecgcjf2nkcgmq3sh3m5gjxz23vzcaynozs5p3uh4")
+	TokenDanErinInvalidExpired    = mustGetDelegation(TokenDanErinInvalidExpiredCID)
+)
+
+var (
+	TokenErinFrankInvalidExpiredCID = gocid.MustParse("bafyreido4om3y3ttkmp4c4gxm6pqug76vu3aekb666vdp6zewpvir5zs7u")
+	TokenErinFrankInvalidExpired    = mustGetDelegation(TokenErinFrankInvalidExpiredCID)
+)
+
+var (
+	TokenCarolDanInvalidInactiveCID = gocid.MustParse("bafyreicea5y2nvlitvxijkupeavtg23i7ktjk3uejnaquguurzptiabk4u")
+	TokenCarolDanInvalidInactive    = mustGetDelegation(TokenCarolDanInvalidInactiveCID)
+)
+
+var (
+	TokenDanErinInvalidInactiveCID = gocid.MustParse("bafyreifsgqzkmxj2vexuts3z766mwcjreiisjg2jykyzf7tbj5sclutpvq")
+	TokenDanErinInvalidInactive    = mustGetDelegation(TokenDanErinInvalidInactiveCID)
+)
+
+var (
+	TokenErinFrankInvalidInactiveCID = gocid.MustParse("bafyreifbfegon24c6dndiqyktahzs65vhyasrygbw7nhsvojn6distsdre")
+	TokenErinFrankInvalidInactive    = mustGetDelegation(TokenErinFrankInvalidInactiveCID)
+)
+
+var ProofAliceBob = []gocid.Cid{
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarol = []gocid.Cid{
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDan = []gocid.Cid{
+	TokenCarolDanCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErin = []gocid.Cid{
+	TokenDanErinCID,
+	TokenCarolDanCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrank = []gocid.Cid{
+	TokenErinFrankCID,
+	TokenDanErinCID,
+	TokenCarolDanCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanInvalidExpandedCommand = []gocid.Cid{
+	TokenCarolDanInvalidExpandedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinInvalidExpandedCommand = []gocid.Cid{
+	TokenDanErinInvalidExpandedCommandCID,
+	TokenCarolDanInvalidExpandedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrankInvalidExpandedCommand = []gocid.Cid{
+	TokenErinFrankInvalidExpandedCommandCID,
+	TokenDanErinInvalidExpandedCommandCID,
+	TokenCarolDanInvalidExpandedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanValidAttenuatedCommand = []gocid.Cid{
+	TokenCarolDanValidAttenuatedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinValidAttenuatedCommand = []gocid.Cid{
+	TokenDanErinValidAttenuatedCommandCID,
+	TokenCarolDanValidAttenuatedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrankValidAttenuatedCommand = []gocid.Cid{
+	TokenErinFrankValidAttenuatedCommandCID,
+	TokenDanErinValidAttenuatedCommandCID,
+	TokenCarolDanValidAttenuatedCommandCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanInvalidSubject = []gocid.Cid{
+	TokenCarolDanInvalidSubjectCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinInvalidSubject = []gocid.Cid{
+	TokenDanErinInvalidSubjectCID,
+	TokenCarolDanInvalidSubjectCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrankInvalidSubject = []gocid.Cid{
+	TokenErinFrankInvalidSubjectCID,
+	TokenDanErinInvalidSubjectCID,
+	TokenCarolDanInvalidSubjectCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanInvalidExpired = []gocid.Cid{
+	TokenCarolDanInvalidExpiredCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinInvalidExpired = []gocid.Cid{
+	TokenDanErinInvalidExpiredCID,
+	TokenCarolDanInvalidExpiredCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrankInvalidExpired = []gocid.Cid{
+	TokenErinFrankInvalidExpiredCID,
+	TokenDanErinInvalidExpiredCID,
+	TokenCarolDanInvalidExpiredCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanInvalidInactive = []gocid.Cid{
+	TokenCarolDanInvalidInactiveCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinInvalidInactive = []gocid.Cid{
+	TokenDanErinInvalidInactiveCID,
+	TokenCarolDanInvalidInactiveCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}
+
+var ProofAliceBobCarolDanErinFrankInvalidInactive = []gocid.Cid{
+	TokenErinFrankInvalidInactiveCID,
+	TokenDanErinInvalidInactiveCID,
+	TokenCarolDanInvalidInactiveCID,
+	TokenBobCarolCID,
+	TokenAliceBobCID,
+}

token/delegation/delegationtest/token_test.go

@@ -0,0 +1,32 @@
+package delegationtest_test
+
+import (
+	"testing"
+
+	"github.com/ipfs/go-cid"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/ucan-wg/go-ucan/token/delegation/delegationtest"
+	"github.com/ucan-wg/go-ucan/token/invocation"
+)
+
+func TestGetDelegation(t *testing.T) {
+	t.Parallel()
+
+	t.Run("passes with valid CID", func(t *testing.T) {
+		t.Parallel()
+
+		tkn, err := delegationtest.GetDelegation(delegationtest.TokenAliceBobCID)
+		require.NoError(t, err)
+		assert.NotZero(t, tkn)
+	})
+
+	t.Run("fails with unknown CID", func(t *testing.T) {
+		t.Parallel()
+
+		tkn, err := delegationtest.GetDelegation(cid.Undef)
+		require.ErrorIs(t, err, invocation.ErrMissingDelegation)
+		require.ErrorContains(t, err, "CID b")
+		assert.Nil(t, tkn)
+	})
+}

token/invocation/invocation_test.go

@@ -1,334 +1,143 @@
 package invocation_test
 
 import (
-	"errors"
-	"fmt"
 	"testing"
-	"time"
 
 	"github.com/ipfs/go-cid"
-	"github.com/libp2p/go-libp2p/core/crypto"
 	"github.com/stretchr/testify/require"
-	"github.com/ucan-wg/go-ucan/did"
+	"github.com/ucan-wg/go-ucan/did/didtest"
 	"github.com/ucan-wg/go-ucan/pkg/args"
 	"github.com/ucan-wg/go-ucan/pkg/command"
-	"github.com/ucan-wg/go-ucan/pkg/policy"
-	"github.com/ucan-wg/go-ucan/token/delegation"
+	"github.com/ucan-wg/go-ucan/token/delegation/delegationtest"
 	"github.com/ucan-wg/go-ucan/token/invocation"
-	"github.com/ucan-wg/go-ucan/token/invocation/invocationtest"
 
 	"github.com/stretchr/testify/assert"
 )
 
 const (
-	rootPrivKeyCfg = "CAESQNMjVXyblHUrtmvdzjfkdrUlLkxh/cHZMFirki7dJLFjW7cCs74VxjO8Wh04f8Xg0uqyKw7N0wTUBiPy2h4hGPQ="
-	rootDIDStr     = "did:key:z6MkkdH136Kee5akqx1DiK3hE3WGx4SKmHo11tYw2cWmjjZV"
-	rootTknCIDStr  = "bafyreibk6lkgd32zldpqqqsdn7diyosokelrhder5lic4ujadtxl5blkei"
-
-	rootOnlyTknCIDStr = "bafyreidyknlfnsah63jujdkhe5vvjil2yoznlgoaezeq62qqhghaxzpfya"
-
-	dlg0PrivKeyCfg = "CAESQFIb3aD0lZzidUzTtwdpHtCyx1VJxe+Uq4x/S+XQFDDgz/NZIi/TR3rhgUn550RSBOSxNmw0QnR0FOPmAB7SXAg="
-	dlg0DIDStr     = "did:key:z6MktT1f5LXQ2MFSUwwTTY9DDU2QdBzZA11V5bjou4YDQY6K"
-	dlg0TknCIDStr  = "bafyreihocbstcdvgyeczjoijiyo2bdppyplm2aglqumwtutyapd2zlp2bi"
-
-	expiredTknDagJson    = `[{"/":{"bytes":"U4IH1Q52UrdOyOHkHtXSkH0uf5ouk10k/LTOMz3UvP2k1kqv9/rbGXUwhQCy6JP3s8hc+U3h/lBXYFYzIlULAw"}},{"h":{"/":{"bytes":"NO0BcQ"}},"ucan/dlg@1.0.0-rc.1":{"aud":"did:key:z6MkqTkYrRV6WpFCWRcEHBXnTV3cVqzMtVZREhJKAAswrrGq","cmd":"/seg0","exp":1731439015,"iss":"did:key:z6MktT1f5LXQ2MFSUwwTTY9DDU2QdBzZA11V5bjou4YDQY6K","nonce":{"/":{"bytes":"AAECAwQFBgcICQoL"}},"pol":[],"sub":"did:key:z6MkkdH136Kee5akqx1DiK3hE3WGx4SKmHo11tYw2cWmjjZV"}}]`
-	expiredDlg0TknCIDStr = "bafyreigezbrohmjmzv5nxdw2nhjabnrvs52vcv4uvbuscnbyr2jzep2vru"
-
-	inactiveDlg0TknCIDStr = "bafyreiffflxvtfiv722i3lomrqcogc6nncxai3voxeltvrphpuwecdfbgq"
-
-	dlg1PrivKeyCfg = "CAESQPHkXp4OatPxpJ1veMAxEYzP4rd3/sPUz9PRQuJaDKTco5DJTdJC5iXxjCe1VDYAmRwlJOBvBdbsvS3qFgV6zoI="
-	dlg1DIDStr     = "did:key:z6MkqTkYrRV6WpFCWRcEHBXnTV3cVqzMtVZREhJKAAswrrGq"
-	dlg1TknCIDStr  = "bafyreihjbkvom3tdivzolh6aieuwamz4x6bu3dh667bxytdc5vzo37obo4"
-
-	// dlg2PrivKeyCfg = "CAESQJryJWe3uGt+7BTH2doqsN+2H83rNXv7Yw0tMoKE+lBKTqByESll668G1Jiy9gW/8hm9/jVcrFD9Y1BWyokfNBE="
-	// dlg2DIDStr     = "did:key:z6MkjkBk9hzMhcr6rYMXHPEsXy1LAWK5dHniNdbaEPojGXr8"
-
-	// dlg3PrivKeyCfg = "CAESQPrLMlX2p+Dgz70YCyVXbHAJfVMT7lLUYAbuZ1rBKQmBLiD7WJ4Spc4VFZAsJ7HUnkneJWNTk/FFaN2z3pb/OZI="
-	// dlg3DIDStr     = "did:key:z6MkhZKy9X4sLtbH1fGQmPVMjXmBAEQ3vAN6DRSfebSBCqpu"
-
-	invPrivKeyCfg = "CAESQHJW8WYTZDRzxjLBjrFN35raIGvVsPoXAJB/5X+J8miboVWVLZFyQmxCAIXOMpwLqWW7R2I98qsCGvxgEJZ5qgY="
-	invDIDStr     = "did:key:z6MkqK3NgTnZZo77iptQdU9proJn1ozMmcTSKR98t8sZzJAq"
-	invTknCIDStr  = ""
-
 	missingPrivKeyCfg = "CAESQMjRvrEIjpPYRQKmkAGw/pV0XgE958rYa4vlnKJjl1zz/sdnGnyV1xKLJk8D39edyjhHWyqcpgFnozQK62SG16k="
-	missingDIDStr     = "bafyreigwypmw6eul6vadi6g6lnfbsfo2zck7gfzsbjoroqs3djhnzzc7mm"
-	missingTknCIDStr  = "did:key:z6MkwboxFsH3kEuehBZ5fLkRmxi68yv1u38swA4r9Jm2VRma"
+	missingTknCIDStr  = "bafyreigwypmw6eul6vadi6g6lnfbsfo2zck7gfzsbjoroqs3djhnzzc7mm"
+	missingDIDStr     = "did:key:z6MkwboxFsH3kEuehBZ5fLkRmxi68yv1u38swA4r9Jm2VRma"
 )
 
+var emptyArguments = args.New()
+
 func TestToken_ExecutionAllowed(t *testing.T) {
 	t.Parallel()
 
 	t.Run("passes - only root", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, rootOnlyTknCIDStr)
-		testPasses(t, []string{"seg0"}, args, prf)
+		testPasses(t, didtest.PersonaBob, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofAliceBob)
 	})
 
 	t.Run("passes - valid chain", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, dlg1TknCIDStr, dlg0TknCIDStr, rootTknCIDStr)
-		testPasses(t, []string{"seg0"}, args, prf)
+		testPasses(t, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrank)
+	})
+
+	t.Run("passes - proof chain attenuates command", func(t *testing.T) {
+		t.Parallel()
+
+		testPasses(t, didtest.PersonaFrank, delegationtest.AttenuatedCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrankValidAttenuatedCommand)
+	})
+
+	t.Run("passes - invocation attenuates command", func(t *testing.T) {
+		t.Parallel()
+
+		testPasses(t, didtest.PersonaFrank, delegationtest.AttenuatedCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrank)
 	})
 
 	t.Run("fails - no proof", func(t *testing.T) {
 		t.Parallel()
 
-		args := args.New()
-		testFails(t, invocation.ErrNoProof, []string{"seg0"}, args, []cid.Cid{})
+		testFails(t, invocation.ErrNoProof, didtest.PersonaCarol, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofEmpty)
 	})
 
 	t.Run("fails - missing referenced delegation", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, missingDIDStr, rootTknCIDStr)
-		testFails(t, invocation.ErrMissingDelegation, []string{"seg0"}, args, prf)
+		missingTknCID, err := cid.Parse(missingTknCIDStr)
+		require.NoError(t, err)
+
+		prf := []cid.Cid{missingTknCID, delegationtest.TokenAliceBobCID}
+		testFails(t, invocation.ErrMissingDelegation, didtest.PersonaCarol, delegationtest.NominalCommand, emptyArguments, prf)
 	})
 
 	t.Run("fails - referenced delegation expired", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, dlg1TknCIDStr, expiredDlg0TknCIDStr, rootTknCIDStr)
-		testFails(t, invocation.ErrTokenInvalidNow, []string{"seg0"}, args, prf)
+		testFails(t, invocation.ErrTokenInvalidNow, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrankInvalidExpired)
+
 	})
 
 	t.Run("fails - referenced delegation inactive", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, dlg1TknCIDStr, inactiveDlg0TknCIDStr, rootTknCIDStr)
-		testFails(t, invocation.ErrTokenInvalidNow, []string{"seg0"}, args, prf)
+		testFails(t, invocation.ErrTokenInvalidNow, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrankInvalidInactive)
 	})
 
 	t.Run("fails - last (or only) delegation not root", func(t *testing.T) {
 		t.Parallel()
 
-		args := args.New()
-		prf := invocationtest.Proof(t, dlg1TknCIDStr)
-		testFails(t, invocation.ErrLastNotRoot, []string{"seg0"}, args, prf)
+		prf := []cid.Cid{delegationtest.TokenErinFrankCID, delegationtest.TokenDanErinCID, delegationtest.TokenCarolDanCID}
+		testFails(t, invocation.ErrLastNotRoot, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, prf)
 	})
 
 	t.Run("fails - broken chain", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, dlg1TknCIDStr, rootTknCIDStr)
-		testFails(t, invocation.ErrBrokenChain, []string{"seg0"}, args, prf)
+		prf := []cid.Cid{delegationtest.TokenCarolDanCID, delegationtest.TokenAliceBobCID}
+		testFails(t, invocation.ErrBrokenChain, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, prf)
 	})
 
 	t.Run("fails - first not issued to invoker", func(t *testing.T) {
 		t.Parallel()
 
-		args := invocationtest.EmptyArguments
-		prf := invocationtest.Proof(t, dlg0TknCIDStr, rootTknCIDStr)
-		testFails(t, invocation.ErrBrokenChain, []string{"seg0"}, args, prf)
+		prf := []cid.Cid{delegationtest.TokenBobCarolCID, delegationtest.TokenAliceBobCID}
+		testFails(t, invocation.ErrBrokenChain, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, prf)
+	})
+
+	t.Run("fails - proof chain expands command", func(t *testing.T) {
+		t.Parallel()
+
+		testFails(t, invocation.ErrCommandNotCovered, didtest.PersonaFrank, delegationtest.NominalCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrankInvalidExpandedCommand)
+	})
+
+	t.Run("fails - invocation expands command", func(t *testing.T) {
+		t.Parallel()
+
+		testFails(t, invocation.ErrCommandNotCovered, didtest.PersonaFrank, delegationtest.ExpandedCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrank)
+	})
+
+	t.Run("fails - inconsistent subject", func(t *testing.T) {
+		t.Parallel()
+
+		testFails(t, invocation.ErrWrongSub, didtest.PersonaFrank, delegationtest.ExpandedCommand, emptyArguments, delegationtest.ProofAliceBobCarolDanErinFrankInvalidSubject)
 	})
 }
 
-func test(t *testing.T, cmdSegs []string, args *args.Args, prf []cid.Cid, opts ...invocation.Option) (bool, error) {
-	ldr := newTestDelegationLoader(t)
-	tkn := testInvocation(t, invPrivKeyCfg, rootDIDStr, rootDIDStr, cmdSegs, args, prf, opts...)
+func test(t *testing.T, persona didtest.Persona, cmd command.Command, args *args.Args, prf []cid.Cid, opts ...invocation.Option) (bool, error) {
+	t.Helper()
+
+	tkn, err := invocation.New(persona.DID(t), didtest.PersonaAlice.DID(t), cmd, prf, opts...)
+	require.NoError(t, err)
+
+	ldr, err := delegationtest.GetDelegationLoader()
+	require.NoError(t, err)
 
 	return tkn.ExecutionAllowed(ldr)
 }
 
-func testFails(t *testing.T, expErr error, cmdSegs []string, args *args.Args, prf []cid.Cid, opts ...invocation.Option) {
-	t.Helper()
-
-	ok, err := test(t, cmdSegs, args, prf, opts...)
+func testFails(t *testing.T, expErr error, persona didtest.Persona, cmd command.Command, args *args.Args, prf []cid.Cid, opts ...invocation.Option) {
+	ok, err := test(t, persona, cmd, args, prf, opts...)
 	require.ErrorIs(t, err, expErr)
 	assert.False(t, ok)
 }
 
-func testPasses(t *testing.T, cmdSegs []string, args *args.Args, prf []cid.Cid, opts ...invocation.Option) {
-	ok, err := test(t, cmdSegs, args, prf, opts...)
+func testPasses(t *testing.T, persona didtest.Persona, cmd command.Command, args *args.Args, prf []cid.Cid, opts ...invocation.Option) {
+	ok, err := test(t, persona, cmd, args, prf, opts...)
 	require.NoError(t, err)
 	assert.True(t, ok)
 }
-
-var _ invocation.DelegationLoader = (*testDelegationLoader)(nil)
-
-type testDelegationLoader struct {
-	tkns map[cid.Cid]*delegation.Token
-}
-
-func newTestDelegationLoader(t *testing.T) *testDelegationLoader {
-	t.Helper()
-
-	cmdSegs := []string{"seg0"}
-	ldr := &testDelegationLoader{
-		tkns: map[cid.Cid]*delegation.Token{},
-	}
-
-	// aud, err := did.Parse(dlg0DIDStr)
-	// require.NoError(t, err)
-	// cmd := command.New(cmdSegs...)
-
-	// pol, err := policy.FromDagJson("[]")
-	// require.NoError(t, err)
-
-	// rootDlg, err := delegation.Root(rootPrivKey, aud, cmd, pol)
-	// require.NoError(t, err)
-	// _, rootCID, err := rootDlg.ToSealed(rootPrivKey)
-	// require.NoError(t, err)
-
-	// Do not add this one to the loader
-	_, missingCID := testDelegation(t, missingPrivKeyCfg, dlg1DIDStr, rootDIDStr, cmdSegs, "[]")
-	t.Log("Missing CID", missingCID)
-
-	rootTkn, rootDlgCID := testDelegation(t, rootPrivKeyCfg, dlg0DIDStr, rootDIDStr, cmdSegs, "[]")
-	t.Log("Root chain CID:", rootDlgCID)
-	ldr.tkns[rootDlgCID] = rootTkn
-
-	rootOnlyTkn, rootOnlyDlgCID := testDelegation(t, rootPrivKeyCfg, invDIDStr, rootDIDStr, cmdSegs, "[]")
-	t.Log("Root only chain CID:", rootOnlyDlgCID)
-	ldr.tkns[rootOnlyDlgCID] = rootOnlyTkn
-
-	dlg0Tkn, dlg0CID := testDelegation(t, dlg0PrivKeyCfg, dlg1DIDStr, rootDIDStr, cmdSegs, "[]")
-	t.Log("Dlg0 CID:", dlg0CID)
-	ldr.tkns[dlg0CID] = dlg0Tkn
-
-	// exp := time.Now().Add(time.Second)
-
-	// expiredDlg0Tkn, expiredDlg0CID := testDelegation(t, dlg0PrivKeyCfg, dlg1DIDStr, rootDIDStr, cmdSegs, "[]", delegation.WithExpiration(exp))
-	// t.Log("Expired Dlg0 CID:", expiredDlg0CID)
-
-	// dlg0PrivKeyEnc, err := crypto.ConfigDecodeKey(dlg0PrivKeyCfg)
-	// require.NoError(t, err)
-	// dlg0PrivKey, err := crypto.UnmarshalPrivateKey(dlg0PrivKeyEnc)
-	// require.NoError(t, err)
-
-	// dlg0DagJson, err := expiredDlg0Tkn.ToDagJson(dlg0PrivKey)
-	// require.NoError(t, err)
-
-	// t.Log("Expired token DAGJSON:", string(dlg0DagJson))
-
-	expiredDlg0Tkn, err := delegation.FromDagJson([]byte(expiredTknDagJson))
-	require.NoError(t, err)
-	expiredDlg0TknCID, err := cid.Parse(expiredDlg0TknCIDStr)
-	ldr.tkns[expiredDlg0TknCID] = expiredDlg0Tkn
-
-	nbf, err := time.Parse(time.RFC3339, "2500-01-01T00:00:00Z")
-	require.NoError(t, err)
-
-	inactiveDlg0Tkn, inactiveDlg0CID := testDelegation(t, dlg0PrivKeyCfg, dlg1DIDStr, rootDIDStr, cmdSegs, "[]", delegation.WithNotBefore(nbf))
-	t.Log("Inactive Dlg0 CID:", inactiveDlg0CID)
-	ldr.tkns[inactiveDlg0CID] = inactiveDlg0Tkn
-
-	dlg1Tkn, dlg1CID := testDelegation(t, dlg1PrivKeyCfg, invDIDStr, rootDIDStr, cmdSegs, "[]")
-	t.Log("Dlg1 CID:", dlg1CID)
-	ldr.tkns[dlg1CID] = dlg1Tkn
-
-	// for i := 0; i < 5; i++ {
-	// 	privKey, id, err := did.GenerateEd25519()
-	// 	require.NoError(t, err)
-
-	// 	privKeyEnc, err := crypto.MarshalPrivateKey(privKey)
-	// 	require.NoError(t, err)
-
-	// 	t.Log("PrivKey:", crypto.ConfigEncodeKey(privKeyEnc), "DID:", id)
-
-	// }
-
-	t.Log("Delegation loader length:", len(ldr.tkns))
-
-	return ldr
-}
-
-var ErrUnknownDelegationTokenCID = errors.New("unknown delegation token CID")
-
-func (l *testDelegationLoader) GetDelegation(c cid.Cid) (*delegation.Token, error) {
-	tkn, ok := l.tkns[c]
-	if !ok {
-		return nil, fmt.Errorf("%w: %s", ErrUnknownDelegationTokenCID, c.String())
-	}
-
-	return tkn, nil
-}
-
-func testDelegation(t *testing.T, privKeyCfg string, audStr string, subStr string, cmdSegs []string, polDAGJSON string, opts ...delegation.Option) (*delegation.Token, cid.Cid) {
-	t.Helper()
-
-	privKey, aud, sub, cmd := parseTokenArgs(t, privKeyCfg, audStr, subStr, cmdSegs)
-
-	pol, err := policy.FromDagJson(polDAGJSON)
-	require.NoError(t, err)
-
-	opts = append(
-		opts,
-		delegation.WithNonce([]byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b}),
-		delegation.WithSubject(sub),
-	)
-
-	tkn, err := delegation.New(privKey, aud, cmd, pol, opts...)
-	require.NoError(t, err)
-
-	_, id, err := tkn.ToSealed(privKey)
-	require.NoError(t, err)
-
-	return tkn, id
-}
-
-func testInvocation(t *testing.T, privKeyCfg string, audStr string, subStr string, cmdSegs []string, args *args.Args, prf []cid.Cid, opts ...invocation.Option) *invocation.Token {
-	t.Helper()
-
-	privKey, _, sub, cmd := parseTokenArgs(t, privKeyCfg, audStr, subStr, cmdSegs)
-
-	iss, err := did.FromPrivKey(privKey)
-	require.NoError(t, err)
-
-	tkn, err := invocation.New(iss, sub, cmd, prf)
-	require.NoError(t, err)
-
-	return tkn
-}
-
-func testProof(t *testing.T, cidStrs ...string) []cid.Cid {
-	var prf []cid.Cid
-
-	for cidStr := range cidStrs {
-		id, err := cid.Parse(cidStr)
-		require.NoError(t, err)
-
-		prf = append(prf, id)
-	}
-
-	return prf
-}
-
-func parseTokenArgs(
-	t *testing.T,
-	privKeyCfg string,
-	audStr string,
-	subStr string,
-	cmdSegs []string,
-) (
-	privKey crypto.PrivKey,
-	aud did.DID,
-	sub did.DID,
-	cmd command.Command,
-) {
-	t.Helper()
-
-	var err error
-
-	privKeyEnc, err := crypto.ConfigDecodeKey(privKeyCfg)
-	require.NoError(t, err)
-	privKey, err = crypto.UnmarshalPrivateKey(privKeyEnc)
-	require.NoError(t, err)
-
-	aud, err = did.Parse(audStr)
-	require.NoError(t, err)
-
-	sub, err = did.Parse(subStr)
-	require.NoError(t, err)
-
-	cmd = command.New(cmdSegs...)
-
-	return
-}

token/invocation/invocationtest/field.go

@@ -1,39 +0,0 @@
-package invocationtest
-
-import (
-	"testing"
-
-	"github.com/ipfs/go-cid"
-	"github.com/stretchr/testify/require"
-	"github.com/ucan-wg/go-ucan/pkg/args"
-	"github.com/ucan-wg/go-ucan/pkg/policy"
-)
-
-var (
-	EmptyArguments = args.New()
-	EmptyPolicy    = emptyPolicy()
-)
-
-func emptyPolicy() policy.Policy {
-	pol, err := policy.FromDagJson("[]")
-	if err != nil {
-		panic(err)
-	}
-
-	return pol
-}
-
-func Proof(t *testing.T, cidStrs ...string) []cid.Cid {
-	// t.Helper()
-
-	prf := make([]cid.Cid, len(cidStrs))
-
-	for i, cidStr := range cidStrs {
-		id, err := cid.Parse(cidStr)
-		require.NoError(t, err)
-
-		prf[i] = id
-	}
-
-	return prf
-}