From 91818cf28c589546a1f26aa82834d80577815dcd Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Sat, 23 Apr 2016 13:16:17 +1200
Subject: [PATCH] Update subsidy tests to account for mining slow start

---
 src/test/main_tests.cpp | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/src/test/main_tests.cpp b/src/test/main_tests.cpp
index 21ae46d6e..e9fb97054 100644
--- a/src/test/main_tests.cpp
+++ b/src/test/main_tests.cpp
@@ -20,18 +20,23 @@ static void TestBlockSubsidyHalvings(const Consensus::Params& consensusParams)
     CAmount nPreviousSubsidy = nInitialSubsidy * 2; // for height == 0
     BOOST_CHECK_EQUAL(nPreviousSubsidy, nInitialSubsidy * 2);
     for (int nHalvings = 0; nHalvings < maxHalvings; nHalvings++) {
-        int nHeight = nHalvings * consensusParams.nSubsidyHalvingInterval;
+        int nHeight;
+        if (nHalvings > 0) // Check subsidy right at halvings
+            nHeight = nHalvings * consensusParams.nSubsidyHalvingInterval + consensusParams.SubsidySlowStartShift();
+        else // Check subsidy just after end of slow start
+            nHeight = consensusParams.nSubsidySlowStartInterval;
         CAmount nSubsidy = GetBlockSubsidy(nHeight, consensusParams);
         BOOST_CHECK(nSubsidy <= nInitialSubsidy);
         BOOST_CHECK_EQUAL(nSubsidy, nPreviousSubsidy / 2);
         nPreviousSubsidy = nSubsidy;
     }
-    BOOST_CHECK_EQUAL(GetBlockSubsidy(maxHalvings * consensusParams.nSubsidyHalvingInterval, consensusParams), 0);
+    BOOST_CHECK_EQUAL(GetBlockSubsidy((maxHalvings * consensusParams.nSubsidyHalvingInterval) + consensusParams.SubsidySlowStartShift(), consensusParams), 0);
 }
 
-static void TestBlockSubsidyHalvings(int nSubsidyHalvingInterval)
+static void TestBlockSubsidyHalvings(int nSubsidySlowStartInterval, int nSubsidyHalvingInterval)
 {
     Consensus::Params consensusParams;
+    consensusParams.nSubsidySlowStartInterval = nSubsidySlowStartInterval;
     consensusParams.nSubsidyHalvingInterval = nSubsidyHalvingInterval;
     TestBlockSubsidyHalvings(consensusParams);
 }
@@ -39,15 +44,32 @@ static void TestBlockSubsidyHalvings(int nSubsidyHalvingInterval)
 BOOST_AUTO_TEST_CASE(block_subsidy_test)
 {
     TestBlockSubsidyHalvings(Params(CBaseChainParams::MAIN).GetConsensus()); // As in main
-    TestBlockSubsidyHalvings(150); // As in regtest
-    TestBlockSubsidyHalvings(1000); // Just another interval
+    TestBlockSubsidyHalvings(50, 150); // As in regtest
+    TestBlockSubsidyHalvings(500, 1000); // Just another interval
 }
 
 BOOST_AUTO_TEST_CASE(subsidy_limit_test)
 {
     const Consensus::Params& consensusParams = Params(CBaseChainParams::MAIN).GetConsensus();
     CAmount nSum = 0;
-    for (int nHeight = 0; nHeight < 14000000; nHeight += 1000) {
+    // Mining slow start
+    for (int nHeight = 0; nHeight < consensusParams.nSubsidySlowStartInterval; nHeight ++) {
+        CAmount nSubsidy = GetBlockSubsidy(nHeight, consensusParams);
+        BOOST_CHECK(nSubsidy <= 50 * COIN);
+        nSum += nSubsidy;
+        BOOST_CHECK(MoneyRange(nSum));
+    }
+    BOOST_CHECK_EQUAL(nSum, 12500000000000ULL);
+    // Remainder of first period
+    for (int nHeight = consensusParams.nSubsidySlowStartInterval; nHeight < consensusParams.nSubsidyHalvingInterval + consensusParams.SubsidySlowStartShift(); nHeight ++) {
+        CAmount nSubsidy = GetBlockSubsidy(nHeight, consensusParams);
+        BOOST_CHECK(nSubsidy <= 50 * COIN);
+        nSum += nSubsidy;
+        BOOST_CHECK(MoneyRange(nSum));
+    }
+    BOOST_CHECK_EQUAL(nSum, 1050000000000000ULL);
+    // Regular mining
+    for (int nHeight = consensusParams.nSubsidyHalvingInterval + consensusParams.SubsidySlowStartShift(); nHeight < 14000000; nHeight += 1000) {
         CAmount nSubsidy = GetBlockSubsidy(nHeight, consensusParams);
         BOOST_CHECK(nSubsidy <= 50 * COIN);
         nSum += nSubsidy * 1000;