Litecoin: Unit test for scrypt_1024_1_1_256() hash

Uncomment the block.print(); in main.cpp below printf("received block ..."
if you want to capture raw input bytes and PoW hashes for testing.

src/main.h

@@ -1482,8 +1482,9 @@ public:
 
     void print() const
     {
-        printf("CBlock(hash=%s, PoW=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%"PRIszu")\n",
+        printf("CBlock(hash=%s, input=%s, PoW=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%"PRIszu")\n",
             GetHash().ToString().c_str(),
+            HexStr(BEGIN(nVersion),BEGIN(nVersion)+80,false).c_str(),
             GetPoWHash().ToString().c_str(),
             nVersion,
             hashPrevBlock.ToString().c_str(),

src/test/scrypt_tests.cpp

@@ -0,0 +1,24 @@
+#include <boost/test/unit_test.hpp>
+
+#include "util.h"
+#include "scrypt.h"
+
+BOOST_AUTO_TEST_SUITE(scrypt_tests)
+
+BOOST_AUTO_TEST_CASE(scrypt_hashtest)
+{
+    // Test Scrypt hash with known inputs against expected outputs
+    #define HASHCOUNT 5
+    const char* inputhex[HASHCOUNT] = { "020000004c1271c211717198227392b029a64a7971931d351b387bb80db027f270411e398a07046f7d4a08dd815412a8712f874a7ebf0507e3878bd24e20a3b73fd750a667d2f451eac7471b00de6659", "0200000011503ee6a855e900c00cfdd98f5f55fffeaee9b6bf55bea9b852d9de2ce35828e204eef76acfd36949ae56d1fbe81c1ac9c0209e6331ad56414f9072506a77f8c6faf551eac7471b00389d01", "02000000a72c8a177f523946f42f22c3e86b8023221b4105e8007e59e81f6beb013e29aaf635295cb9ac966213fb56e046dc71df5b3f7f67ceaeab24038e743f883aff1aaafaf551eac7471b0166249b", "010000007824bc3a8a1b4628485eee3024abd8626721f7f870f8ad4d2f33a27155167f6a4009d1285049603888fe85a84b6c803a53305a8d497965a5e896e1a00568359589faf551eac7471b0065434e", "0200000050bfd4e4a307a8cb6ef4aef69abc5c0f2d579648bd80d7733e1ccc3fbc90ed664a7f74006cb11bde87785f229ecd366c2d4e44432832580e0608c579e4cb76f383f7f551eac7471b00c36982" };
+    const char* expected[HASHCOUNT] = { "00000000002bef4107f882f6115e0b01f348d21195dacd3582aa2dabd7985806" , "00000000003a0d11bdd5eb634e08b7feddcfbbf228ed35d250daf19f1c88fc94", "00000000000b40f895f288e13244728a6c2d9d59d8aff29c65f8dd5114a8ca81", "00000000003007005891cd4923031e99d8e8d72f6e8e7edc6a86181897e105fe", "000000000018f0b426a4afc7130ccb47fa02af730d345b4fe7c7724d3800ec8c" };
+    uint256 scrypthash;
+    std::vector<unsigned char> inputbytes;
+
+    for (int i = 0; i < HASHCOUNT; i++) {
+        inputbytes = ParseHex(inputhex[i]);
+        scrypt_1024_1_1_256((const char*)&inputbytes[0], BEGIN(scrypthash));
+        BOOST_CHECK_EQUAL(scrypthash.ToString().c_str(), expected[i]);
+    }
+}
+
+BOOST_AUTO_TEST_SUITE_END()