parser: implement whole-block parsing and publicize constructors

parser/block_test.go

@@ -0,0 +1,42 @@
+package parser
+
+import (
+	"bufio"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/pkg/errors"
+)
+
+func TestBlockParser(t *testing.T) {
+	testBlocks, err := os.Open("testdata/blocks")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer testBlocks.Close()
+
+	scan := bufio.NewScanner(testBlocks)
+	for i := 0; scan.Scan(); i++ {
+		blockDataHex := scan.Text()
+		blockData, err := hex.DecodeString(blockDataHex)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+
+		block := NewBlock()
+		blockData, err = block.ParseFromSlice(blockData)
+		if err != nil {
+			t.Error(errors.Wrap(err, fmt.Sprintf("parsing block %d", i)))
+			continue
+		}
+
+		// Some basic sanity checks
+		if block.hdr.Version != 4 {
+			t.Error("Read wrong version in a test block.")
+			break
+		}
+	}
+}