some test cases for cache, found some bugs, fixed

cache.h

@@ -43,7 +43,7 @@ public:
     virtual void removeRecord(const K& key) override;
     virtual V getRecord(const K& key) const override;
     virtual uint32_t count() const override;
-    virtual void drop() override;
+    virtual int drop(MDB_txn * transaction) override;
 
 protected:
     Mode* mode;

cache.hpp

@@ -100,7 +100,7 @@ V DataBase::Cache<K, V>::getRecord(const K& key) const {
         return itr->second;
     }
 
-    if (*mode == Mode::full || abscent->count(key) == 0) {
+    if (*mode == Mode::full || abscent->count(key) != 0) {
         throw NotFound(DataBase::_Table::toString(key), DataBase::Table<K, V>::db->name, DataBase::Table<K, V>::name);
     }
 
@@ -169,12 +169,13 @@ void DataBase::Cache<K, V>::handleMode() const {
 }
 
 template<class K, class V>
-void DataBase::Cache<K, V>::drop() {
+int DataBase::Cache<K, V>::drop(MDB_txn * transaction) {
-    DataBase::Table<K, V>::drop();
+    int res = DataBase::Table<K, V>::drop(transaction);
     cache->clear();
     abscent->clear();
     *mode = Mode::full;
     *sizeDifference = 0;
+    return res;
 }
 
 #endif //DATABASE_CACHE_HPP

test/basic.cpp

@@ -73,6 +73,16 @@ TEST_F(DataBaseTest, AddingQStringKey) {
     EXPECT_EQ(t2->getRecord("hello"), "world");
 }
 
+TEST_F(DataBaseTest, AddingKeysToCache) {
+    EXPECT_EQ(db->ready(), true);
+    c1->addRecord(2, "blah balah");
+    c1->addRecord(-4, "testing goes brrr");
+    c1->addRecord(140, "whatever");
+    c1->addRecord(-37, "aaaaa tss tsss tsss tsss aaaaaaa");
+    EXPECT_EQ(c1->getRecord(140), "whatever");
+    EXPECT_EQ(c1->getRecord(-116), "whatever");
+}
+
 TEST_F(DataBaseTest, AddingRepeatingIntegerKey) {
     EXPECT_EQ(db->ready(), true);
     bool thrown = false;
@@ -97,6 +107,18 @@ TEST_F(DataBaseTest, AddingRepeatingStringKey) {
     EXPECT_EQ(t2->getRecord("sdfhga"), "DSFFDG");
 }
 
+TEST_F(DataBaseTest, AddingRepeatingCacheKey) {
+    EXPECT_EQ(db->ready(), true);
+    bool thrown = false;
+    try {
+        c1->addRecord(-4, "world");
+    } catch (const DataBase::Exist e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+    EXPECT_EQ(c1->getRecord(-4), "testing goes brrr");
+}
+
 TEST_F(DataBaseTest, GettingNotExistingKeys) {
     EXPECT_EQ(db->ready(), true);
     bool thrown = false;
@@ -114,6 +136,14 @@ TEST_F(DataBaseTest, GettingNotExistingKeys) {
         thrown = true;
     }
     ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+
+    thrown = false;
+    try {
+        std::string wrong = c1->getRecord(21);
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
 }
 
 TEST_F(DataBaseTest, Persistence) {
@@ -130,11 +160,18 @@ TEST_F(DataBaseTest, Persistence) {
     EXPECT_EQ(t1->getRecord(3), 15);
     EXPECT_EQ(t1->getRecord(1), 2);
     EXPECT_EQ(t1->getRecord(2), 2);
+
     EXPECT_EQ(t2->getRecord("hello"), "world");
     EXPECT_EQ(t2->getRecord("aaa"), "gagdfsdf");
     EXPECT_EQ(t2->getRecord("sdfhga"), "DSFFDG");
     EXPECT_EQ(t2->getRecord("sdfsda"), "shgsdgfa");
 
+    EXPECT_EQ(c1->getRecord(-116), "whatever");
+    EXPECT_EQ(c1->getRecord(-4), "testing goes brrr");
+    EXPECT_EQ(c1->getRecord(-4), "testing goes brrr");
+    EXPECT_EQ(c1->getRecord(-37), "aaaaa tss tsss tsss tsss aaaaaaa");
+    EXPECT_EQ(c1->getRecord(2), "blah balah");
+
     bool thrown = false;
     try {
         QString wrong = t2->getRecord("cats");
@@ -150,22 +187,35 @@ TEST_F(DataBaseTest, Persistence) {
         thrown = true;
     }
     ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
+
+    thrown = false;
+    try {
+        std::string wrong = c1->getRecord(89);
+    } catch (const DataBase::NotFound e) {
+        thrown = true;
+    }
+    ASSERT_EQ(thrown, true) << "The expected behaviour is to throw exception on duplicate, but it didn't happened";
 }
 
 TEST_F(DataBaseTest, CountAndDrop) {
     EXPECT_EQ(db->ready(), true);
     EXPECT_EQ(t1->count(), 3);
     EXPECT_EQ(t2->count(), 4);
+    EXPECT_EQ(c1->count(), 4);
 
     db->drop();
 
     EXPECT_EQ(t1->count(), 0);
     EXPECT_EQ(t2->count(), 0);
+    EXPECT_EQ(c1->count(), 0);
 
     t1->addRecord(2, 2);
     t2->addRecord("sdfhga", "world");
+    c1->addRecord(15, "world");
+    c1->addRecord(12, "grr grr");
 
     EXPECT_EQ(t1->count(), 1);
     EXPECT_EQ(t2->count(), 1);
+    EXPECT_EQ(c1->count(), 2);
 }