eth/downloader: added additional tests

eth/downloader/queue_test.go

@@ -0,0 +1,62 @@
+package downloader
+
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"gopkg.in/fatih/set.v0"
+)
+
+func createHashSet(hashes []common.Hash) *set.Set {
+	hset := set.New()
+
+	for _, hash := range hashes {
+		hset.Add(hash)
+	}
+
+	return hset
+}
+
+func createBlocksFromHashSet(hashes *set.Set) []*types.Block {
+	blocks := make([]*types.Block, hashes.Size())
+
+	var i int
+	hashes.Each(func(v interface{}) bool {
+		blocks[i] = createBlock(i, common.Hash{}, v.(common.Hash))
+		i++
+		return true
+	})
+
+	return blocks
+}
+
+func TestChunking(t *testing.T) {
+	queue := newqueue()
+	peer1 := newPeer("peer1", common.Hash{}, nil, nil)
+	peer2 := newPeer("peer2", common.Hash{}, nil, nil)
+
+	// 99 + 1 (1 == known genesis hash)
+	hashes := createHashes(0, 99)
+	hashSet := createHashSet(hashes)
+	queue.put(hashSet)
+
+	chunk1 := queue.get(peer1, 99)
+	if chunk1 == nil {
+		t.Errorf("chunk1 is nil")
+		t.FailNow()
+	}
+	chunk2 := queue.get(peer2, 99)
+	if chunk2 == nil {
+		t.Errorf("chunk2 is nil")
+		t.FailNow()
+	}
+
+	if chunk1.hashes.Size() != 99 {
+		t.Error("expected chunk1 hashes to be 99, got", chunk1.hashes.Size())
+	}
+
+	if chunk2.hashes.Size() != 1 {
+		t.Error("expected chunk1 hashes to be 1, got", chunk2.hashes.Size())
+	}
+}