diff --git a/.gitignore b/.gitignore
index 094f8ba..18891f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 cmake*
+!CMakePresets.json
 build
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
index a68d3bf..bd28a17 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,7 +3,7 @@
 	url = https://github.com/semihc/qdecimal.git
 [submodule "3rdparty/QxOrm"]
 	path = 3rdparty/QxOrm
-	url = https://github.com/PepaRokos/QxOrm.git
+	url = https://github.com/QxOrm/QxOrm.git
 [submodule "3rdparty/LimeReport"]
 	path = 3rdparty/LimeReport
 	url = https://github.com/PepaRokos/LimeReport.git
diff --git a/3rdparty/QxOrm b/3rdparty/QxOrm
index 975c3b5..44fd7f1 160000
--- a/3rdparty/QxOrm
+++ b/3rdparty/QxOrm
@@ -1 +1 @@
-Subproject commit 975c3b5ad3e02e3a257f28ff81071da0a17a1e64
+Subproject commit 44fd7f16172a8894f2bfb3d4d11efaa4c3d9e24e
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d306a36..3391162 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,13 @@
 cmake_minimum_required(VERSION 3.24)
 project(prodejna-root)
 
+include(CTest)
+option(ENABLE_ZINT "Enable LimeReport barcode support" ON)
+
+find_package(Qt6 6.11.2 REQUIRED COMPONENTS Core Core5Compat Test Gui Widgets PrintSupport Sql Qml Network Xml Svg)
+
+set(CMAKE_POLICY_VERSION_MINIMUM 3.10)
+
 add_subdirectory(3rdparty/qdecimal)
 add_subdirectory(3rdparty/QxOrm)
 add_subdirectory(3rdparty/LimeReport)
@@ -15,3 +22,7 @@ add_subdirectory(shop)
 add_subdirectory(commodity)
 add_subdirectory(camp)
 
+if(BUILD_TESTING)
+	add_subdirectory(tests)
+endif()
+
diff --git a/CMakePresets.json b/CMakePresets.json
new file mode 100644
index 0000000..bac2065
--- /dev/null
+++ b/CMakePresets.json
@@ -0,0 +1,34 @@
+{
+  "version": 5,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 24,
+    "patch": 0
+  },
+  "configurePresets": [
+    {
+      "name": "qt6-debug",
+      "displayName": "Qt 6.11.2+ Debug",
+      "generator": "Ninja",
+      "binaryDir": "${sourceDir}/build/presets/${presetName}",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug"
+      }
+    }
+  ],
+  "buildPresets": [
+    {
+      "name": "qt6-debug",
+      "configurePreset": "qt6-debug"
+    }
+  ],
+  "testPresets": [
+    {
+      "name": "qt6-debug",
+      "configurePreset": "qt6-debug",
+      "output": {
+        "outputOnFailure": true
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/camp_tests.cpp b/tests/camp_tests.cpp
new file mode 100644
index 0000000..990372e
--- /dev/null
+++ b/tests/camp_tests.cpp
@@ -0,0 +1,103 @@
+#include <QCoreApplication>
+#include <QtTest>
+
+#include "data/campdata.h"
+#include "data/serviceitem.h"
+#include "data/addressitem.h"
+#include "data/personprice.h"
+
+class CampTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void campDataDefaultsAreZeroed()
+    {
+        CampData camp;
+
+        QCOMPARE(camp.totalPrice().toDouble(), 0.0);
+        QCOMPARE(camp.sale().toDouble(), 0.0);
+        QCOMPARE(camp.totalSale().toDouble(), 0.0);
+        QCOMPARE(camp.fullPrice().toDouble(), 0.0);
+        QVERIFY(!camp.fixedSale());
+        QVERIFY(!camp.onVoucher());
+    }
+
+    void campPricesRoundTripWithoutLoss()
+    {
+        CampData camp;
+
+        camp.setTotalPrice(QDecDouble(19.9));
+        camp.setSale(QDecDouble(4.9));
+        camp.setFullPrice(QDecDouble(24.8));
+
+        QVERIFY(qAbs(camp.totalPrice().toDouble() - 19.9) < 0.0001);
+        QVERIFY(qAbs(camp.sale().toDouble() - 4.9) < 0.0001);
+        QVERIFY(qAbs(camp.fullPrice().toDouble() - 24.8) < 0.0001);
+    }
+
+    void campCollectsPeopleAndServices()
+    {
+        CampData camp;
+        auto person = QSharedPointer<AddressItem>::create();
+        auto service = QSharedPointer<ServiceItem>::create();
+
+        camp.addPerson(person);
+        camp.addServiceItem(service);
+        QCOMPARE(camp.people().size(), 1);
+        QCOMPARE(camp.services().size(), 1);
+
+        camp.removePerson(person);
+        camp.removeServiceItem(service);
+        QVERIFY(camp.people().isEmpty());
+        QVERIFY(camp.services().isEmpty());
+    }
+
+    void serviceItemPricesRoundTrip()
+    {
+        ServiceItem item;
+
+        item.setPrice(QDecDouble(33.3));
+        item.setTotalPrice(QDecDouble(66.6));
+        item.setSale(QDecDouble(3.3));
+
+        QVERIFY(qAbs(item.price().toDouble() - 33.3) < 0.0001);
+        QVERIFY(qAbs(item.totalPrice().toDouble() - 66.6) < 0.0001);
+        QVERIFY(qAbs(item.sale().toDouble() - 3.3) < 0.0001);
+    }
+
+    void addressItemOwnerFlagAndPrice()
+    {
+        AddressItem person;
+
+        person.setOwner(true);
+        person.setPrice(QDecDouble(12.5));
+
+        QVERIFY(person.owner());
+        QVERIFY(qAbs(person.price().toDouble() - 12.5) < 0.0001);
+    }
+
+    void personPriceAgeRangeAndPrice()
+    {
+        PersonPrice price;
+
+        price.setFromAge(3);
+        price.setToAge(12);
+        price.setPrice(QDecDouble(7.5));
+        price.setActive(true);
+
+        QCOMPARE(price.fromAge(), 3);
+        QCOMPARE(price.toAge(), 12);
+        QVERIFY(qAbs(price.price().toDouble() - 7.5) < 0.0001);
+        QVERIFY(price.active());
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    CampTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "camp_tests.moc"
diff --git a/tests/commodity_tests.cpp b/tests/commodity_tests.cpp
new file mode 100644
index 0000000..3a6f745
--- /dev/null
+++ b/tests/commodity_tests.cpp
@@ -0,0 +1,82 @@
+#include <QCoreApplication>
+#include <QtTest>
+
+#include "data/commoditydata.h"
+
+class CommodityTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void defaultsAreZero()
+    {
+        CommodityData commodity;
+
+        QCOMPARE(commodity.price().toDouble(), 0.0);
+        QCOMPARE(commodity.count(), 0);
+        QCOMPARE(commodity.vat(), Enums::NONE);
+        QVERIFY(!commodity.favorite());
+    }
+
+    void priceRoundTripUsesFixedPointStorage()
+    {
+        CommodityData commodity;
+
+        commodity.setPrice(QDecDouble(19.9));
+
+        QVERIFY(qAbs(commodity.price().toDouble() - 19.9) < 0.0001);
+        QCOMPARE(commodity.price(), commodity.unitPrice());
+    }
+
+    void priceRoundTripHandlesWholeAmounts()
+    {
+        CommodityData commodity;
+
+        commodity.setPrice(QDecDouble(125));
+
+        QCOMPARE(commodity.price().toDouble(), 125.0);
+    }
+
+    void vatMirrorsShopItemInterface()
+    {
+        CommodityData commodity;
+
+        commodity.setVat(Enums::HIGH);
+
+        QCOMPARE(commodity.vat(), Enums::HIGH);
+        QCOMPARE(commodity.vatType(), Enums::HIGH);
+    }
+
+    void pluginIdMatchesEmbeddedMetadata()
+    {
+        CommodityData commodity;
+
+        QCOMPARE(commodity.pluginId(), QStringLiteral("COMMODITY"));
+    }
+
+    void basicPropertiesRoundTrip()
+    {
+        CommodityData commodity;
+
+        commodity.setName(QStringLiteral("Položka"));
+        commodity.setShortName(QStringLiteral("Pol."));
+        commodity.setCode(QStringLiteral("A-01"));
+        commodity.setCount(7);
+        commodity.setFavorite(true);
+
+        QCOMPARE(commodity.name(), QStringLiteral("Položka"));
+        QCOMPARE(commodity.shortName(), QStringLiteral("Pol."));
+        QCOMPARE(commodity.code(), QStringLiteral("A-01"));
+        QCOMPARE(commodity.count(), 7);
+        QVERIFY(commodity.favorite());
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    CommodityTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "commodity_tests.moc"
diff --git a/tests/core_tests.cpp b/tests/core_tests.cpp
new file mode 100644
index 0000000..62ec45f
--- /dev/null
+++ b/tests/core_tests.cpp
@@ -0,0 +1,157 @@
+#include <QCoreApplication>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QLocale>
+#include <QSettings>
+#include <QSignalSpy>
+#include <QTemporaryDir>
+#include <QtTest>
+
+#include "context.h"
+#include "data/permission.h"
+#include "data/role.h"
+#include "data/user.h"
+#include "imetadataplugin.h"
+#include "permissionevaluator.h"
+
+class CoreTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void init()
+    {
+        Context::instance().setCurrentUser({});
+    }
+
+    void cleanup()
+    {
+        Context::instance().setCurrentUser({});
+    }
+
+    void metadataRejectsMissingObject()
+    {
+        QVERIFY(!IMetaDataPlugin::loadBaseMetaData({}));
+        QVERIFY(!IMetaDataPlugin::loadBaseMetaData(QJsonObject{{"MetaData", QStringLiteral("invalid")}}));
+    }
+
+    void metadataUsesDefaultLocaleAndExtractsSchema()
+    {
+        const QJsonObject metadata{
+            {"id", QStringLiteral("EXAMPLE")},
+            {"schemaVersion", 2},
+            {"name", QJsonObject{{"default", QStringLiteral("Example plugin")}}},
+            {"description", QJsonObject{{"default", QStringLiteral("Example description")}}},
+            {"sql", QJsonArray{QStringLiteral("CREATE TABLE example (id INTEGER)")}},
+            {"dependencies", QJsonArray{QStringLiteral("CORE")}}
+        };
+
+        const MetaDataPtr result = IMetaDataPlugin::loadBaseMetaData(QJsonObject{{"MetaData", metadata}});
+
+        QVERIFY(result);
+        QCOMPARE(result->getId(), QStringLiteral("EXAMPLE"));
+        QCOMPARE(result->getName(), QStringLiteral("Example plugin"));
+        QCOMPARE(result->getDescription(), QStringLiteral("Example description"));
+        QCOMPARE(result->getSchemaVersion(), 2);
+        QCOMPARE(result->getSchemas(), QStringList{QStringLiteral("CREATE TABLE example (id INTEGER)")});
+        QCOMPARE(result->getDependsOn(), QStringList{QStringLiteral("CORE")});
+    }
+
+    void metadataPrefersSystemLocale()
+    {
+        const QString locale = QLocale::system().name();
+        const QJsonObject metadata{
+            {"id", QStringLiteral("LOCALIZED")},
+            {"name", QJsonObject{{"default", QStringLiteral("Fallback")}, {locale, QStringLiteral("Localized")}}},
+            {"description", QJsonObject{{"default", QStringLiteral("Fallback description")}}}
+        };
+
+        const MetaDataPtr result = IMetaDataPlugin::loadBaseMetaData(QJsonObject{{"MetaData", metadata}});
+
+        QVERIFY(result);
+        QCOMPARE(result->getName(), QStringLiteral("Localized"));
+        QCOMPARE(result->getDescription(), QStringLiteral("Fallback description"));
+    }
+
+    void permissionDeniedWithoutUser()
+    {
+        PermissionEvaluator evaluator;
+        QSignalSpy denied(&evaluator, &PermissionEvaluator::permissionDenied);
+
+        QVERIFY(!evaluator.hasPermission(QStringLiteral("SHOP"), QStringLiteral("READ")));
+        QCOMPARE(denied.count(), 0);
+    }
+
+    void administratorBypassesPermissionLookup()
+    {
+        auto user = QSharedPointer<User>::create();
+        user->setIsAdmin(true);
+        Context::instance().setCurrentUser(user);
+
+        PermissionEvaluator evaluator;
+        QSignalSpy denied(&evaluator, &PermissionEvaluator::permissionDenied);
+
+        QVERIFY(evaluator.hasPermission(QStringLiteral("SHOP"), QStringLiteral("DELETE")));
+        QCOMPARE(denied.count(), 0);
+    }
+
+    void matchingRolePermissionIsGranted()
+    {
+        auto permission = QSharedPointer<Permission>::create();
+        permission->setPluginId(QStringLiteral("SHOP"));
+        permission->setPermissionName(QStringLiteral("READ"));
+
+        auto role = QSharedPointer<Role>::create();
+        role->addPermission(permission);
+
+        auto user = QSharedPointer<User>::create();
+        user->setIsAdmin(false);
+        user->addRole(role);
+        Context::instance().setCurrentUser(user);
+
+        PermissionEvaluator evaluator;
+        QSignalSpy denied(&evaluator, &PermissionEvaluator::permissionDenied);
+
+        QVERIFY(evaluator.hasPermission(QStringLiteral("SHOP"), QStringLiteral("READ")));
+        QCOMPARE(denied.count(), 0);
+    }
+
+    void mismatchedPermissionIsDeniedAndEmitsSignal()
+    {
+        auto permission = QSharedPointer<Permission>::create();
+        permission->setPluginId(QStringLiteral("SHOP"));
+        permission->setPermissionName(QStringLiteral("READ"));
+
+        auto role = QSharedPointer<Role>::create();
+        role->addPermission(permission);
+
+        auto user = QSharedPointer<User>::create();
+        user->setIsAdmin(false);
+        user->addRole(role);
+        Context::instance().setCurrentUser(user);
+
+        PermissionEvaluator evaluator;
+        QSignalSpy denied(&evaluator, &PermissionEvaluator::permissionDenied);
+
+        QVERIFY(!evaluator.hasPermission(QStringLiteral("SHOP"), QStringLiteral("DELETE")));
+        QCOMPARE(denied.count(), 1);
+        QCOMPARE(denied.takeFirst().at(0).toString(), QStringLiteral("DELETE"));
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    QTemporaryDir settingsDirectory;
+    if (!settingsDirectory.isValid()) {
+        return 1;
+    }
+
+    QSettings::setDefaultFormat(QSettings::IniFormat);
+    QSettings::setPath(QSettings::IniFormat, QSettings::UserScope, settingsDirectory.path());
+
+    CoreTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "core_tests.moc"
\ No newline at end of file
diff --git a/tests/persistence_tests.cpp b/tests/persistence_tests.cpp
new file mode 100644
index 0000000..b69b0bf
--- /dev/null
+++ b/tests/persistence_tests.cpp
@@ -0,0 +1,81 @@
+#include <QCoreApplication>
+#include <QFileInfo>
+#include <QSettings>
+#include <QTemporaryDir>
+#include <QtTest>
+
+#include <QxOrm.h>
+
+#include "context.h"
+#include "service.h"
+#include "../countryregister/data/countrydata.h"
+
+class PersistenceTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void crudCycleOnTemporaryDatabase()
+    {
+        QTemporaryDir dir;
+        QVERIFY(dir.isValid());
+        const QString dbPath = dir.filePath(QStringLiteral("countries.db"));
+
+        qx::QxSqlDatabase::getSingleton()->setDriverName(QStringLiteral("QSQLITE"));
+        qx::QxSqlDatabase::getSingleton()->setDatabaseName(dbPath);
+
+        const QSqlError createError = qx::dao::create_table<CountryData>();
+        QVERIFY2(!createError.isValid(), qPrintable(createError.text()));
+        QVERIFY(QFileInfo::exists(dbPath));
+
+        Service<CountryData> service;
+
+        auto country = QSharedPointer<CountryData>::create();
+        country->setCode2(QStringLiteral("CZ"));
+        country->setCode3(QStringLiteral("CZE"));
+        country->setCzechName(QStringLiteral("Česko"));
+        country->setEnglishName(QStringLiteral("Czechia"));
+
+        QSignalSpy errorSpy(&service, &Service<CountryData>::dbError);
+        service.save(country);
+        QCOMPARE(errorSpy.count(), 0);
+        QVERIFY(country->id() > 0);
+
+        const QList<QSharedPointer<CountryData>> all = service.all();
+        QCOMPARE(all.size(), 1);
+        QCOMPARE(all.first()->code2(), QStringLiteral("CZ"));
+        QCOMPARE(all.first()->czechName(), QStringLiteral("Česko"));
+
+        auto loaded = service.loadById(country->id());
+        QVERIFY(!loaded.isNull());
+        QCOMPARE(loaded->code3(), QStringLiteral("CZE"));
+
+        loaded->setCzechName(QStringLiteral("Česká republika"));
+        service.update(loaded);
+        QCOMPARE(errorSpy.count(), 0);
+
+        auto reloaded = service.loadById(country->id());
+        QCOMPARE(reloaded->czechName(), QStringLiteral("Česká republika"));
+
+        service.erase(reloaded);
+        QCOMPARE(errorSpy.count(), 0);
+        QVERIFY(service.all().isEmpty());
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    QTemporaryDir settingsDirectory;
+    if (!settingsDirectory.isValid()) {
+        return 1;
+    }
+
+    QSettings::setDefaultFormat(QSettings::IniFormat);
+    QSettings::setPath(QSettings::IniFormat, QSettings::UserScope, settingsDirectory.path());
+
+    PersistenceTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "persistence_tests.moc"
diff --git a/tests/plugin_metadata_tests.cpp b/tests/plugin_metadata_tests.cpp
new file mode 100644
index 0000000..47377e2
--- /dev/null
+++ b/tests/plugin_metadata_tests.cpp
@@ -0,0 +1,73 @@
+#include <QCoreApplication>
+#include <QFileInfo>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QPluginLoader>
+#include <QtTest>
+
+#include "imetadataplugin.h"
+#include "iplugin.h"
+
+struct PluginExpectation
+{
+    QString path;
+    QString id;
+};
+
+class PluginMetadataTests : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit PluginMetadataTests(QList<PluginExpectation> plugins)
+        : m_plugins(std::move(plugins))
+    {
+    }
+
+private slots:
+    void embeddedMetadataMatchesPluginContract()
+    {
+        for (const PluginExpectation &plugin : m_plugins) {
+            QVERIFY2(QFileInfo::exists(plugin.path), qPrintable(plugin.path));
+
+            QPluginLoader loader(plugin.path);
+            const QJsonObject metadata = loader.metaData();
+            QVERIFY2(!metadata.isEmpty(), qPrintable(loader.errorString()));
+            QCOMPARE(metadata.value(QStringLiteral("IID")).toString(), QString::fromLatin1(PluginInterface_iid));
+
+            const QJsonObject data = metadata.value(QStringLiteral("MetaData")).toObject();
+            QVERIFY2(!data.isEmpty(), qPrintable(plugin.path));
+            QCOMPARE(data.value(QStringLiteral("id")).toString(), plugin.id);
+            QVERIFY(data.value(QStringLiteral("schemaVersion")).toInt() > 0);
+            QVERIFY(data.value(QStringLiteral("sql")).isArray());
+            QVERIFY(data.value(QStringLiteral("dependencies")).isArray());
+
+            const MetaDataPtr parsed = IMetaDataPlugin::loadBaseMetaData(metadata);
+            QVERIFY(parsed);
+            QCOMPARE(parsed->getId(), plugin.id);
+            QCOMPARE(parsed->getSchemaVersion(), data.value(QStringLiteral("schemaVersion")).toInt());
+            QCOMPARE(parsed->getSchemas().size(), data.value(QStringLiteral("sql")).toArray().size());
+        }
+    }
+
+private:
+    QList<PluginExpectation> m_plugins;
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    if (argc < 3 || (argc - 1) % 2 != 0) {
+        return 2;
+    }
+
+    QList<PluginExpectation> plugins;
+    for (int index = 1; index < argc; index += 2) {
+        plugins.append({QString::fromLocal8Bit(argv[index]), QString::fromLocal8Bit(argv[index + 1])});
+    }
+
+    PluginMetadataTests tests(std::move(plugins));
+    return QTest::qExec(&tests, 1, argv);
+}
+
+#include "plugin_metadata_tests.moc"
\ No newline at end of file
diff --git a/tests/services_tests.cpp b/tests/services_tests.cpp
new file mode 100644
index 0000000..2967bac
--- /dev/null
+++ b/tests/services_tests.cpp
@@ -0,0 +1,67 @@
+#include <QCoreApplication>
+#include <QtTest>
+
+#include "data/accservice.h"
+
+class ServicesTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void defaultsMatchExpectedInitialState()
+    {
+        AccService service;
+
+        QCOMPARE(service.price().toDouble(), 0.0);
+        QVERIFY(service.active());
+        QVERIFY(!service.salePossible());
+        QCOMPARE(service.serviceType(), AccService::OTHER);
+        QCOMPARE(service.vatType(), Enums::NONE);
+    }
+
+    void priceRoundTripUsesFixedPointStorage()
+    {
+        AccService service;
+
+        service.setPrice(QDecDouble(19.9));
+
+        QVERIFY(qAbs(service.price().toDouble() - 19.9) < 0.0001);
+    }
+
+    void priceRoundTripHandlesWholeAmounts()
+    {
+        AccService service;
+
+        service.setPrice(QDecDouble(250));
+
+        QCOMPARE(service.price().toDouble(), 250.0);
+    }
+
+    void basicPropertiesRoundTrip()
+    {
+        AccService service;
+
+        service.setAccServiceName(QStringLiteral("Ubytování"));
+        service.setAccServiceCode(QStringLiteral("UB-1"));
+        service.setActive(false);
+        service.setSalePossible(true);
+        service.setServiceType(AccService::TENT);
+        service.setVatType(Enums::FIRST_LOWER);
+
+        QCOMPARE(service.accServiceName(), QStringLiteral("Ubytování"));
+        QCOMPARE(service.accServiceCode(), QStringLiteral("UB-1"));
+        QVERIFY(!service.active());
+        QVERIFY(service.salePossible());
+        QCOMPARE(service.serviceType(), AccService::TENT);
+        QCOMPARE(service.vatType(), Enums::FIRST_LOWER);
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    ServicesTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "services_tests.moc"
diff --git a/tests/shop_tests.cpp b/tests/shop_tests.cpp
new file mode 100644
index 0000000..b5ee344
--- /dev/null
+++ b/tests/shop_tests.cpp
@@ -0,0 +1,57 @@
+#include <QCoreApplication>
+#include <QtTest>
+
+#include "data/voucher.h"
+
+class ShopTests : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void defaultsMatchNewVoucherState()
+    {
+        Voucher voucher;
+
+        QCOMPARE(voucher.totalPrice().toDouble(), 0.0);
+        QCOMPARE(voucher.status(), Voucher::NEW);
+        QCOMPARE(voucher.eetStatus(), Voucher::EET_FOR_SEND);
+    }
+
+    void totalPriceRoundTripUsesFixedPointStorage()
+    {
+        Voucher voucher;
+
+        voucher.setTotalPrice(QDecDouble(19.9));
+
+        QVERIFY(qAbs(voucher.totalPrice().toDouble() - 19.9) < 0.0001);
+    }
+
+    void vatAmountIsDifferenceBetweenTotalAndBase()
+    {
+        Voucher voucher;
+
+        voucher.setTotalPriceVatHigh(QDecDouble(121));
+        voucher.setPriceVatHigh(QDecDouble(100));
+
+        QVERIFY(qAbs(voucher.vatAmountHigh().toDouble() - 21.0) < 0.0001);
+    }
+
+    void voucherSumAccumulatesPricesWithoutTruncation()
+    {
+        VoucherSum sum(0, 0);
+
+        sum.addPrice(QDecDouble(19.9));
+        sum.addPrice(QDecDouble(0.1));
+
+        QVERIFY(qAbs(sum.totalPrice().toDouble() - 20.0) < 0.0001);
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    ShopTests tests;
+    return QTest::qExec(&tests, argc, argv);
+}
+
+#include "shop_tests.moc"