parser: implement container-level parsing of block headers

parser/block_test.go

@@ -0,0 +1,51 @@
+package parser
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/hex"
+	"os"
+	"testing"
+)
+
+func TestReadBlockHeader(t *testing.T) {
+	testBlocks, err := os.Open("testdata/blocks")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer testBlocks.Close()
+
+	lastBlockTime := uint32(0)
+
+	scan := bufio.NewScanner(testBlocks)
+	for scan.Scan() {
+		blockDataHex := scan.Text()
+		decodedBlockData, err := hex.DecodeString(blockDataHex)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		reader := bytes.NewReader(decodedBlockData)
+		rawHeader, err := ReadBlockHeader(reader)
+		if err != nil {
+			t.Error(err)
+			break
+		}
+
+		if rawHeader.Version != 4 {
+			t.Error("Read wrong version in a test block.")
+			break
+		}
+
+		if rawHeader.Time < lastBlockTime {
+			t.Error("Block times not increasing.")
+			break
+		}
+		lastBlockTime = rawHeader.Time
+
+		if rawHeader.SolutionSize.Size != 1344 {
+			t.Error("Got wrong Equihash solution size.")
+			break
+		}
+	}
+}