Remove Q_ASSERT's from qreadwritelock autotest

The tryWriteLock testfunction didn't do anything useful in non-debug
builds, due to the thread having the important code inside Q_ASSERT's,
which are no-ops in non-debug builds.  This commit removes the
Q_ASSERT's, counts the number of failures in the thread and fails the
test if there are any failures recorded.

Change-Id: I4750f66eeba22ab51ba348ebc06704052421f1ae
Task-number: QTBUG-17582
Reviewed-by: Rohan McGovern
(cherry picked from commit 00f724c943b83f10f9ca9475570708536947538e)

1 files changed, 21 insertions, 8 deletions

diff --git a/tests/auto/qreadwritelock/tst_qreadwritelock.cpp b/tests/auto/qreadwritelock/tst_qreadwritelock.cpp
index e0cc2fa200..0d575a13d9 100644
--- a/tests/auto/qreadwritelock/tst_qreadwritelock.cpp
+++ b/tests/auto/qreadwritelock/tst_qreadwritelock.cpp
@@ -362,34 +362,45 @@ void tst_QReadWriteLock::tryWriteLock()
         class Thread : public QThread
         {
         public:
+            Thread() : failureCount(0) { }
             void run()
             {
                 testsTurn.release();
 
                 threadsTurn.acquire();
-                Q_ASSERT(!readWriteLock.tryLockForWrite());
+                if (readWriteLock.tryLockForWrite())
+                    failureCount++;
                 testsTurn.release();
 
                 threadsTurn.acquire();
-                Q_ASSERT(readWriteLock.tryLockForWrite());
-                Q_ASSERT(lockCount.testAndSetRelaxed(0, 1));
-                Q_ASSERT(lockCount.testAndSetRelaxed(1, 0));
+                if (!readWriteLock.tryLockForWrite())
+                    failureCount++;
+                if (!lockCount.testAndSetRelaxed(0, 1))
+                    failureCount++;
+                if (!lockCount.testAndSetRelaxed(1, 0))
+                    failureCount++;
                 readWriteLock.unlock();
                 testsTurn.release();
 
                 threadsTurn.acquire();
-                Q_ASSERT(!readWriteLock.tryLockForWrite(1000));
+                if (readWriteLock.tryLockForWrite(1000))
+                    failureCount++;
                 testsTurn.release();
 
                 threadsTurn.acquire();
-                Q_ASSERT(readWriteLock.tryLockForWrite(1000));
-                Q_ASSERT(lockCount.testAndSetRelaxed(0, 1));
-                Q_ASSERT(lockCount.testAndSetRelaxed(1, 0));
+                if (!readWriteLock.tryLockForWrite(1000))
+                    failureCount++;
+                if (!lockCount.testAndSetRelaxed(0, 1))
+                    failureCount++;
+                if (!lockCount.testAndSetRelaxed(1, 0))
+                    failureCount++;
                 readWriteLock.unlock();
                 testsTurn.release();
 
                 threadsTurn.acquire();
             }
+
+            int failureCount;
         };
 
         Thread thread;
@@ -419,6 +430,8 @@ void tst_QReadWriteLock::tryWriteLock()
         testsTurn.acquire();
         threadsTurn.release();
         thread.wait();
+
+        QCOMPARE(thread.failureCount, 0);
     }
 }