Alter assumptions in CCoinsViewCache::BatchWrite

Previously it would break if you flushed a parent cache while there was a child cache referring to it.  This change will allow the flushing of parent caches.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/coins_tests.cpp b/src/test/coins_tests.cpp
index 946f904dfa..9489a19f63 100644
--- a/src/test/coins_tests.cpp
+++ b/src/test/coins_tests.cpp
@@ -165,13 +165,22 @@ BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
         }
 
         if (insecure_rand() % 100 == 0) {
+            // Every 100 iterations, flush an intermediate cache
+            if (stack.size() > 1 && insecure_rand() % 2 == 0) {
+                unsigned int flushIndex = insecure_rand() % (stack.size() - 1);
+                stack[flushIndex]->Flush();
+            }
+        }
+        if (insecure_rand() % 100 == 0) {
             // Every 100 iterations, change the cache stack.
             if (stack.size() > 0 && insecure_rand() % 2 == 0) {
+                //Remove the top cache
                 stack.back()->Flush();
                 delete stack.back();
                 stack.pop_back();
             }
             if (stack.size() == 0 || (stack.size() < 4 && insecure_rand() % 2)) {
+                //Add a new cache
                 CCoinsView* tip = &base;
                 if (stack.size() > 0) {
                     tip = stack.back();
@@ -305,6 +314,13 @@ BOOST_AUTO_TEST_CASE(updatecoins_simulation_test)
         }
 
         if (insecure_rand() % 100 == 0) {
+            // Every 100 iterations, flush an intermediate cache
+            if (stack.size() > 1 && insecure_rand() % 2 == 0) {
+                unsigned int flushIndex = insecure_rand() % (stack.size() - 1);
+                stack[flushIndex]->Flush();
+            }
+        }
+        if (insecure_rand() % 100 == 0) {
             // Every 100 iterations, change the cache stack.
             if (stack.size() > 0 && insecure_rand() % 2 == 0) {
                 stack.back()->Flush();