qt5base-lts/tests
Ivan Solovev 0681a2dd5a QTestLib: rework QTest::compare_helper()
[ChangeLog][QTestLib] QCOMPARE now evaluates toString() on its
arguments lazily, speeding up the general case where the comparison
doesn't fail. This is true for the QCOMPARE functionality provided
by Qt. If you specialized qCompare() for your own types, then you
need to change its implementation in line with Qt's own qCompare()
specializations in order to enable this feature.

[ChangeLog][QTestLib] QCOMPARE calls with nullptr argument(s) will
now print the actual and expected values upon failure.

Previously it was not like that because of the compareHelper()
overload in qtestresult.cpp that treated the presence of
nullptr-arguments as a reason to ignore formatFailMessage() call.
New implementation does not have this check, and correctly
executes formatFailMessage() for all arguments.

Note that the qCompare() overloads that call QTestResult::compare()
internally were not affected by this patch, because they already
defer toString() invocation until the comparison fails.

Some numbers, collected against shared release developer build.
I checked how this change affects the test execution. The idea was
to pick some tests for types that do not have a specific
QTestResult::compare overload, so I picked a couple of QByteArray
tests.
The comparison is done by running a test 10 times and taking the
average execution duration, as reported in the log.

tst_qbytearrayapisymmetry:
 Before: 15.6 ms
 After:  14.2 ms

tst_qbytearray:
 Before: 41 ms
 After:  36 ms

The benefit is around 9% and 12% respectively.

Fixes: QTBUG-98874
Change-Id: I7d59ddc760168b15974e7720930f629fb34efa13
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
2022-06-03 20:37:51 +00:00
..
auto QTestLib: rework QTest::compare_helper() 2022-06-03 20:37:51 +00:00
baseline Add painter render hint for brush pattern transformation 2022-05-31 21:20:41 +02:00
benchmarks QTextDocument: add setLayoutEnabled() 2022-05-26 16:58:42 +02:00
global
libfuzzer Use SPDX license identifiers 2022-05-16 16:37:38 +02:00
manual wasm: Improve wheel event handling 2022-05-24 03:10:10 +02:00
shared Use SPDX license identifiers 2022-05-16 16:37:38 +02:00
testserver Use SPDX license identifiers 2022-05-16 16:37:38 +02:00
CMakeLists.txt CMake: Refactor optimization flag handling and add optimize_full 2020-10-06 10:07:05 +02:00
README Doc: Fix references to Qt Test 2013-01-30 01:35:06 +01:00

This directory contains autotests and benchmarks based on Qt Test. In order
to run the autotests reliably, you need to configure a desktop to match the
test environment that these tests are written for.

Linux X11:

   * The user must be logged in to an active desktop; you can't run the
     autotests without a valid DISPLAY that allows X11 connections.

   * The tests are run against a KDE3 or KDE4 desktop.

   * Window manager uses "click to focus", and not "focus follows mouse". Many
     tests move the mouse cursor around and expect this to not affect focus
     and activation.

   * Disable "click to activate", i.e., when a window is opened, the window
     manager should automatically activate it (give it input focus) and not
     wait for the user to click the window.