How to run multiple QTest classes?

Question

I have a subproject where I put all my QTest unit tests and build a stand-alone test application that runs the tests (i.e. I run it from within Qt Creator). I have

Answer 1

I once found a nice solution using a plain Qt project (no TEMPLATE = subdirs) which uses a macro approach for creating the main function and automatic registering of all test classes (macro, too) with only a simple helper header file.

Here is a sample test class (only the relevant header file):

#ifndef FOOTESTS_H
#define FOOTESTS_H

#include "AutoTest.h"

class FooTests : public QObject
{
    Q_OBJECT
    private slots:
        void initTestCase();
        void test1();
        void test2();
        void cleanupTestCase();
};

DECLARE_TEST(FooTests)

#endif // FOOTESTS_H

and the main, which consumes every test class created this way:

#include "AutoTest.h"

TEST_MAIN

The code of AutoTest.h:

#ifndef AUTOTEST_H
#define AUTOTEST_H

#include <QTest>
#include <QList>
#include <QString>
#include <QSharedPointer>

namespace AutoTest
{
 typedef QList<QObject*> TestList;

 inline TestList& testList()
 {
  static TestList list;
  return list;
 }

 inline bool findObject(QObject* object)
 {
  TestList& list = testList();
  if (list.contains(object))
  {
   return true;
  }
  foreach (QObject* test, list)
  {
   if (test->objectName() == object->objectName())
   {
    return true;
   }
  }
  return false;
 }

 inline void addTest(QObject* object)
 {
  TestList& list = testList();
  if (!findObject(object))
  {
   list.append(object);
  }
 }

 inline int run(int argc, char *argv[])
 {
  int ret = 0;

  foreach (QObject* test, testList())
  {
   ret += QTest::qExec(test, argc, argv);
  }

  return ret;
 }
}

template <class T>
class Test
{
public:
 QSharedPointer<T> child;

 Test(const QString& name) : child(new T)
 {
  child->setObjectName(name);
  AutoTest::addTest(child.data());
 }
};

#define DECLARE_TEST(className) static Test<className> t(#className);

#define TEST_MAIN \
 int main(int argc, char *argv[]) \
 { \
  return AutoTest::run(argc, argv); \
 }

#endif // AUTOTEST_H

All credits goes to Rob Caldecott.