rename tokens to token

token/internal/envelope/example_test.go

@@ -0,0 +1,138 @@
+package envelope_test
+
+import (
+	_ "embed"
+	"encoding/base64"
+	"fmt"
+	"sync"
+	"testing"
+
+	"github.com/ipld/go-ipld-prime"
+	"github.com/ipld/go-ipld-prime/codec/dagcbor"
+	"github.com/ipld/go-ipld-prime/datamodel"
+	"github.com/ipld/go-ipld-prime/fluent/qp"
+	"github.com/ipld/go-ipld-prime/node/basicnode"
+	"github.com/ipld/go-ipld-prime/node/bindnode"
+	"github.com/ipld/go-ipld-prime/schema"
+	"github.com/libp2p/go-libp2p/core/crypto"
+	"github.com/stretchr/testify/require"
+	"gotest.tools/v3/golden"
+
+	"github.com/ucan-wg/go-ucan/token/internal/envelope"
+)
+
+const (
+	exampleCID             = "zdpuAyw6R5HvKSPzztuzXNYFx3ZGoMHMuAsXL6u3xLGQriRXQ"
+	exampleDID             = "did:key:z6MkpuK2Amsu1RqcLGgmHHQHhvmeXCCBVsM4XFSg2cCyg4Nh"
+	exampleGreeting        = "world"
+	examplePrivKeyCfg      = "CAESQP9v2uqECTuIi45dyg3znQvsryvf2IXmOF/6aws6aCehm0FVrj0zHR5RZSDxWNjcpcJqsGym3sjCungX9Zt5oA4="
+	exampleSignatureStr    = "PZV6A2aI7n+MlyADqcqmWhkuyNrgUCDz+qSLSnI9bpasOwOhKUTx95m5Nu5CO/INa1LqzHGioD9+PVf6qdtTBg"
+	exampleTag             = "ucan/example@v1.0.0-rc.1"
+	exampleTypeName        = "Example"
+	exampleVarsigHeaderStr = "NO0BcQ"
+
+	invalidSignatureStr = "PZV6A2aI7n+MlyADqcqmWhkuyNrgUCDz+qSLSnI9bpasOwOhKUTx95m5Nu5CO/INa1LqzHGioD9+PVf6qdtTBK"
+
+	exampleDAGCBORFilename = "example.dagcbor"
+	exampleDAGJSONFilename = "example.dagjson"
+)
+
+//go:embed testdata/example.ipldsch
+var schemaBytes []byte
+
+var (
+	once sync.Once
+	ts   *schema.TypeSystem
+	err  error
+)
+
+func mustLoadSchema() *schema.TypeSystem {
+	once.Do(func() {
+		ts, err = ipld.LoadSchemaBytes(schemaBytes)
+	})
+
+	if err != nil {
+		panic(fmt.Errorf("failed to load IPLD schema: %s", err))
+	}
+
+	return ts
+}
+
+func exampleType() schema.Type {
+	return mustLoadSchema().TypeByName(exampleTypeName)
+}
+
+var _ envelope.Tokener = (*Example)(nil)
+
+type Example struct {
+	Hello  string
+	Issuer string
+}
+
+func newExample(t *testing.T) *Example {
+	t.Helper()
+
+	return &Example{
+		Hello:  exampleGreeting,
+		Issuer: exampleDID,
+	}
+}
+
+func (e *Example) Prototype() schema.TypedPrototype {
+	return bindnode.Prototype(e, exampleType())
+}
+
+func (*Example) Tag() string {
+	return exampleTag
+}
+
+func exampleGoldenNode(t *testing.T) datamodel.Node {
+	t.Helper()
+
+	cbor := golden.Get(t, exampleDAGCBORFilename)
+
+	node, err := ipld.Decode(cbor, dagcbor.Decode)
+	require.NoError(t, err)
+
+	return node
+}
+
+func examplePrivKey(t *testing.T) crypto.PrivKey {
+	t.Helper()
+
+	privKeyEnc, err := crypto.ConfigDecodeKey(examplePrivKeyCfg)
+	require.NoError(t, err)
+
+	privKey, err := crypto.UnmarshalPrivateKey(privKeyEnc)
+	require.NoError(t, err)
+
+	return privKey
+}
+
+func exampleSignature(t *testing.T) []byte {
+	t.Helper()
+
+	sig, err := base64.RawStdEncoding.DecodeString(exampleSignatureStr)
+	require.NoError(t, err)
+
+	return sig
+}
+
+func invalidNodeFromGolden(t *testing.T) datamodel.Node {
+	t.Helper()
+
+	invalidSig, err := base64.RawStdEncoding.DecodeString(invalidSignatureStr)
+	require.NoError(t, err)
+
+	envelNode := exampleGoldenNode(t)
+	sigPayloadNode, err := envelNode.LookupByIndex(1)
+	require.NoError(t, err)
+
+	node, err := qp.BuildList(basicnode.Prototype.Any, 2, func(la datamodel.ListAssembler) {
+		qp.ListEntry(la, qp.Bytes(invalidSig))
+		qp.ListEntry(la, qp.Node(sigPayloadNode))
+	})
+	require.NoError(t, err)
+
+	return node
+}