From 894698bd80007447950e045ab5beed8cb4a03f54 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Fri, 5 Dec 2014 00:57:03 +0100
Subject: A storagetest including concurrency read test.

---
 store/test/storagetest.cpp | 111 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 store/test/storagetest.cpp

(limited to 'store/test/storagetest.cpp')

diff --git a/store/test/storagetest.cpp b/store/test/storagetest.cpp
new file mode 100644
index 0000000..1b105af
--- /dev/null
+++ b/store/test/storagetest.cpp
@@ -0,0 +1,111 @@
+#include <QtTest>
+
+#include <iostream>
+
+#include <QDebug>
+#include <QString>
+#include <QtConcurrent/QtConcurrentRun>
+
+#include "store/database.h"
+
+class StorageTest : public QObject
+{
+    Q_OBJECT
+private:
+    //This should point to a directory on disk and not a ramdisk (since we're measuring performance)
+    QString testDataPath;
+    QString dbName;
+    const char *keyPrefix = "key";
+
+    void populate(int count)
+    {
+        Database db(testDataPath, dbName);
+        for (int i = 0; i < count; i++) {
+            //This should perhaps become an implementation detail of the db?
+            if (i % 10000 == 0) {
+                if (i > 0) {
+                    db.commitTransaction();
+                }
+                db.startTransaction();
+            }
+            db.write(keyPrefix + std::to_string(i), keyPrefix + std::to_string(i));
+        }
+        db.commitTransaction();
+    }
+
+    bool verify(Database &db, int i)
+    {
+        bool error = false;
+        const auto reference = keyPrefix + std::to_string(i);
+        db.read(keyPrefix + std::to_string(i), [&error, &reference](const std::string &value) {
+            if (value != reference) {
+                qDebug() << "Mismatch while reading";
+                error = true;
+            }
+        });
+        return !error;
+    }
+
+private Q_SLOTS:
+    void initTestCase()
+    {
+        testDataPath = "./testdb";
+        dbName = "test";
+    }
+
+    void cleanupTestCase()
+    {
+        Database db(testDataPath, dbName);
+        db.removeFromDisk();
+    }
+
+
+    void testRead()
+    {
+        const int count = 100;
+
+        populate(count);
+
+        //ensure we can read everything back correctly
+        {
+            Database db(testDataPath, dbName);
+            for (int i = 0; i < count; i++) {
+                QVERIFY(verify(db, i));
+            }
+        }
+
+        Database db(testDataPath, dbName);
+        db.removeFromDisk();
+    }
+
+    void testConcurrentRead()
+    {
+        const int count = 10000;
+
+        populate(count);
+
+        //Try to concurrently read
+        QList<QFuture<void> > futures;
+        const int concurrencyLevel = 4;
+        for (int num = 0; num < concurrencyLevel; num++) {
+            futures << QtConcurrent::run([this, count](){
+                Database db(testDataPath, dbName);
+                for (int i = 0; i < count; i++) {
+                    if (!verify(db, i)) {
+                        qWarning() << "invalid value";
+                        break;
+                    }
+                }
+            });
+        }
+        for(auto future : futures) {
+            future.waitForFinished();
+        }
+
+        Database db(testDataPath, dbName);
+        db.removeFromDisk();
+    }
+};
+
+QTEST_MAIN(StorageTest)
+#include "storagetest.moc"
-- 
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