pivotal-jbarrett commented on a change in pull request #619:
URL: https://github.com/apache/geode-native/pull/619#discussion_r442553693



##########
File path: cppcache/integration/test/PdxJsonTypeTest.cpp
##########
@@ -142,4 +146,91 @@ TEST(PdxJsonTypeTest, testTwoConsecutiveGets) {
       std::dynamic_pointer_cast<PdxInstance>(region2->get("simpleObject")));
 }
 
+TEST(PdxJsonTypeTest, testTwoObjectsWithSameFieldsHaveTheSameHash) {
+  Cluster cluster{LocatorCount{1}, ServerCount{1}};
+  cluster.start();
+  cluster.getGfsh()
+    .create()
+    .region()
+    .withName("region")
+    .withType("REPLICATE")
+    .execute();
+
+  auto cache = cluster.createCache();
+
+  auto properties = std::make_shared<Properties>();
+  CacheImpl cacheImpl(&cache, properties, false, false, nullptr);
+
+  PdxTypeRegistry pdxTypeRegistry(&cacheImpl);
+
+  apache::geode::client::PdxType m_pdxType1(pdxTypeRegistry, 
gemfireJsonClassName,false);
+  apache::geode::client::PdxType m_pdxType2(pdxTypeRegistry, 
gemfireJsonClassName,false);
+
+  m_pdxType1.addVariableLengthTypeField("bar0", "string", 
PdxFieldTypes::STRING);
+  m_pdxType1.addVariableLengthTypeField("bar1", "string", 
PdxFieldTypes::STRING);
+
+  m_pdxType2.addVariableLengthTypeField("bar0", "string", 
PdxFieldTypes::STRING);
+  m_pdxType2.addVariableLengthTypeField("bar1", "string", 
PdxFieldTypes::STRING);
+
+  EXPECT_EQ(std::hash<PdxType>(m_pdxType1),std::hash<PdxType>(m_pdxType2));
+}
+
+TEST(PdxJsonTypeTest, testTwoObjectsWithDifferentFieldsHaveDifferentHash) {
+  Cluster cluster{LocatorCount{1}, ServerCount{1}};
+  cluster.start();
+  cluster.getGfsh()
+      .create()
+      .region()
+      .withName("region")
+      .withType("REPLICATE")
+      .execute();
+
+  auto cache = cluster.createCache();
+
+  auto properties = std::make_shared<Properties>();
+  CacheImpl cacheImpl(&cache, properties, false, false, nullptr);
+
+  PdxTypeRegistry pdxTypeRegistry(&cacheImpl);
+
+  apache::geode::client::PdxType m_pdxType1(pdxTypeRegistry, 
gemfireJsonClassName,false);
+  apache::geode::client::PdxType m_pdxType2(pdxTypeRegistry, 
gemfireJsonClassName,false);
+
+  m_pdxType1.addVariableLengthTypeField("bar0", "string", 
PdxFieldTypes::STRING);
+  m_pdxType1.addVariableLengthTypeField("bar1", "string", 
PdxFieldTypes::STRING);
+
+  m_pdxType2.addVariableLengthTypeField("bar2", "string", 
PdxFieldTypes::STRING);
+  m_pdxType2.addVariableLengthTypeField("bar3", "string", 
PdxFieldTypes::STRING);
+
+  EXPECT_NE(std::hash<PdxType>(m_pdxType1),std::hash<PdxType>(m_pdxType2));

Review comment:
       Oh yeah forgot about that test object. It but me a few times too and 
thought it should be renamed. I assumed you tried the fully qualified name on 
the line 204 too?




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