From 4f70734b5a6c56ba3df3f8381047cdd045440bf9 Mon Sep 17 00:00:00 2001
From: Jason Sadler <jsadler@brave.com>
Date: Tue, 9 Apr 2019 17:49:22 -0400
Subject: [PATCH] Fixes brave/brave-browser#3668

Address PR comments
---
 .../src/bat/ledger/internal/bat_publishers.cc | 12 +++--
 .../src/bat/ledger/internal/bat_publishers.h  |  1 +
 .../internal/bat_publishers_unittest.cc       | 51 +++++++++++++++++++
 3 files changed, 60 insertions(+), 4 deletions(-)

diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.cc b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.cc
index ebf2cab65ded..76aff303e5b9 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.cc
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.cc
@@ -461,11 +461,15 @@ void BatPublishers::synopsisNormalizerInternal(
     }
     if (percents.size() != 0) {
       if (totalPercents > 100) {
-        percents[valueToChange] -= 1;
-        totalPercents -= 1;
+        if (percents[valueToChange] != 0) {
+          percents[valueToChange] -= 1;
+          totalPercents -= 1;
+        }
       } else {
-        percents[valueToChange] += 1;
-        totalPercents += 1;
+        if (percents[valueToChange] != 100) {
+          percents[valueToChange] += 1;
+          totalPercents += 1;
+        }
       }
       roundoffs[valueToChange] = 0;
     }
diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.h b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.h
index 4815edb78183..fda4aa1cdaca 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.h
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers.h
@@ -218,6 +218,7 @@ class BatPublishers : public ledger::LedgerCallbackHandler {
   friend class BatPublishersTest;
   FRIEND_TEST_ALL_PREFIXES(BatPublishersTest, calcScoreConsts);
   FRIEND_TEST_ALL_PREFIXES(BatPublishersTest, concaveScore);
+  FRIEND_TEST_ALL_PREFIXES(BatPublishersTest, synopsisNormalizerInternal);
 };
 
 }  // namespace braveledger_bat_publishers
diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers_unittest.cc b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers_unittest.cc
index 99455575aae6..0c270860bef5 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers_unittest.cc
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/bat_publishers_unittest.cc
@@ -12,6 +12,24 @@
 namespace braveledger_bat_publishers {
 
 class BatPublishersTest : public testing::Test {
+ protected:
+  void CreatePublisherInfoList(
+      ledger::PublisherInfoList* list) {
+    double prev_score;
+    for (int ix = 0; ix < 50; ix++) {
+      ledger::PublisherInfo info("example" + std::to_string(ix) + ".com");
+      info.duration = 50;
+      if (ix == 0) {
+        info.score = 24;
+      } else {
+        info.score = prev_score / 2;
+      }
+      prev_score = info.score;
+      info.reconcile_stamp = 0;
+      info.visits = 5;
+      list->push_back(info);
+    }
+  }
 };
 
 TEST_F(BatPublishersTest, calcScoreConsts) {
@@ -96,4 +114,37 @@ TEST_F(BatPublishersTest, concaveScore) {
   EXPECT_NEAR(publishers->concaveScore(500000), 74.7025, 0.001f);
 }
 
+TEST_F(BatPublishersTest, synopsisNormalizerInternal) {
+  std::unique_ptr<braveledger_bat_publishers::BatPublishers> bat_publishers =
+      std::make_unique<braveledger_bat_publishers::BatPublishers>(nullptr);
+  // create test PublisherInfo list
+  ledger::PublisherInfoList new_list;
+  ledger::PublisherInfoList list;
+  CreatePublisherInfoList(&list);
+  bat_publishers->synopsisNormalizerInternal(
+      &new_list, list, 0);
+
+  // simulate exclude and re-normalize
+  new_list.erase(new_list.begin() + 3);
+  ledger::PublisherInfoList new_list2;
+  bat_publishers->synopsisNormalizerInternal(
+      &new_list2, new_list, 0);
+  new_list2.erase(new_list2.begin() + 4);
+  ledger::PublisherInfoList new_list3;
+  bat_publishers->synopsisNormalizerInternal(
+      &new_list3, new_list2, 0);
+  new_list3.erase(new_list3.begin() + 5);
+  ledger::PublisherInfoList new_list4;
+  bat_publishers->synopsisNormalizerInternal(
+      &new_list4, new_list3, 0);
+  new_list4.erase(new_list4.begin() + 6);
+  ledger::PublisherInfoList new_list5;
+  bat_publishers->synopsisNormalizerInternal(
+      &new_list5, new_list4, 0);
+  for (auto element : new_list5) {
+    ASSERT_GE((int32_t)element.percent, 0);
+    ASSERT_LE((int32_t)element.percent, 100);
+  }
+}
+
 }  // namespace braveledger_bat_publishers