Remove Q_ASSERT's from QWizard autotest

Combine the two checking functions (check and checkInvariant) and have
the resulting check function return a bool instead of asserting so that
the test function can QVERIFY and fail gracefully.

Change-Id: Ib069b5424483ba6ffb9caf75036c4f325e9dba51
Task-number: QTBUG-17582
Reviewed-by: Rohan McGovern
(cherry picked from commit a54900d2227bfb2021c5d1255817824aff11cf32)

tests/auto/qwizard/tst_qwizard.cpp

@@ -854,25 +854,26 @@ struct MyPage2 : public QWizardPage
 public:
     MyPage2() : init(0), cleanup(0), validate(0) {}
 
-    void initializePage() { ++init; QWizardPage::initializePage(); checkInvariant(); }
-    void cleanupPage() { ++cleanup; QWizardPage::cleanupPage(); checkInvariant(); }
+    void initializePage() { ++init; QWizardPage::initializePage(); }
+    void cleanupPage() { ++cleanup; QWizardPage::cleanupPage(); }
     bool validatePage() { ++validate; return QWizardPage::validatePage(); }
 
-    void check(int init, int cleanup)
-    { Q_ASSERT(init == this->init && cleanup == this->cleanup); Q_UNUSED(init); Q_UNUSED(cleanup); }
+    bool check(int init, int cleanup)
+    {
+        return init == this->init
+            && cleanup == this->cleanup
+            && (this->init == this->cleanup || this->init - 1 == this->cleanup);
+    }
 
     int init;
     int cleanup;
     int validate;
-
-private:
-    void checkInvariant() { Q_ASSERT(init == cleanup || init - 1 == cleanup); }
 };
 
 #define CHECK_PAGE_INIT(i0, c0, i1, c1, i2, c2) \
-    page0->check((i0), (c0)); \
-    page1->check((i1), (c1)); \
-    page2->check((i2), (c2));
+    QVERIFY(page0->check((i0), (c0))); \
+    QVERIFY(page1->check((i1), (c1))); \
+    QVERIFY(page2->check((i2), (c2)));
 
 void tst_QWizard::setOption_IndependentPages()
 {