complete the marshal/unmarshal of events using the new pool enabled tag codecs

pkg/encoders/text/helpers_test.go

@@ -0,0 +1,54 @@
+package text
+
+import (
+	"testing"
+
+	"lol.mleku.dev/chk"
+	"lukechampine.com/frand"
+	"next.orly.dev/pkg/crypto/sha256"
+	"next.orly.dev/pkg/encoders/hex"
+	"next.orly.dev/pkg/utils"
+)
+
+func TestUnmarshalHexArray(t *testing.T) {
+	var ha [][]byte
+	h := make([]byte, sha256.Size)
+	frand.Read(h)
+	var dst []byte
+	for _ = range 20 {
+		hh := sha256.Sum256(h)
+		h = hh[:]
+		ha = append(ha, h)
+	}
+	dst = append(dst, '[')
+	for i := range ha {
+		dst = AppendQuote(dst, ha[i], hex.EncAppend)
+		if i != len(ha)-1 {
+			dst = append(dst, ',')
+		}
+	}
+	dst = append(dst, ']')
+	var ha2 [][]byte
+	var rem []byte
+	var err error
+	if ha2, rem, err = UnmarshalHexArray(dst, sha256.Size); chk.E(err) {
+		t.Fatal(err)
+	}
+	if len(ha2) != len(ha) {
+		t.Fatalf(
+			"failed to unmarshal, got %d fields, expected %d", len(ha2),
+			len(ha),
+		)
+	}
+	if len(rem) > 0 {
+		t.Fatalf("failed to unmarshal, remnant afterwards '%s'", rem)
+	}
+	for i := range ha2 {
+		if !utils.FastEqual(ha[i], ha2[i]) {
+			t.Fatalf(
+				"failed to unmarshal at element %d; got %x, expected %x",
+				i, ha[i], ha2[i],
+			)
+		}
+	}
+}