Add PartSet test.

merkle/util_test.go

@@ -0,0 +1,35 @@
+package merkle
+
+import (
+	. "github.com/tendermint/tendermint/common"
+
+	"testing"
+)
+
+// TODO: Actually test. All this does is help debug.
+// consensus/part_set tests some of this functionality.
+func TestHashTreeMerkleTrail(t *testing.T) {
+
+	numHashes := 5
+
+	// Make some fake "hashes".
+	hashes := make([][]byte, numHashes)
+	for i := 0; i < numHashes; i++ {
+		hashes[i] = RandBytes(32)
+		t.Logf("hash %v\t%X\n", i, hashes[i])
+	}
+
+	hashTree := HashTreeFromHashes(hashes)
+	for i := 0; i < len(hashTree); i++ {
+		t.Logf("tree %v\t%X\n", i, hashTree[i])
+	}
+
+	for i := 0; i < numHashes; i++ {
+		t.Logf("trail %v\n", i)
+		trail := HashTrailForIndex(hashTree, i)
+		for j := 0; j < len(trail); j++ {
+			t.Logf("index: %v, hash: %X\n", j, trail[j])
+		}
+	}
+
+}