Fix QFINDTESTDATA when using cmake ninja generator

The Qt CI does not have ninja, but the autotest can be used for manual
regression finding.

 cd qtbase/tests/auto/cmake
 qmake
 make check
 cd build
 cmake . -DHAVE_NINJA=ON
 ctest -R FINDTESTDATA

Change-Id: Ic3f3748f6ab04e37fa5287c59486e5cd46dcabb4
Reviewed-by: Stephen Kelly <steveire@gmail.com>

src/testlib/Qt5TestConfigExtras.cmake.in

@@ -0,0 +1,5 @@
+
+set_property(TARGET Qt5::Test
+  APPEND PROPERTY
+    INTERFACE_COMPILE_DEFINITIONS QT_TESTCASE_BUILDDIR=\\\"\${CMAKE_BINARY_DIR}\\\"
+)

tests/auto/cmake/CMakeLists.txt

@@ -68,6 +68,24 @@ expect_fail(test_wrap_cpp_options)
 expect_pass(test_platform_defs_include)
 expect_pass(test_qtmainwin_library)
 
+if (HAVE_NINJA)
+    make_directory("${CMAKE_CURRENT_SOURCE_DIR}/test_QFINDTESTDATA/build")
+    add_test(test_QFINDTESTDATA ${CMAKE_CTEST_COMMAND}
+      --build-and-test
+      "${CMAKE_CURRENT_SOURCE_DIR}/test_QFINDTESTDATA"
+      # Build in a subdir of the source dir.
+      # This causes Ninja to use relative paths.
+      "${CMAKE_CURRENT_SOURCE_DIR}/test_QFINDTESTDATA/build"
+      --build-generator Ninja
+      --build-options "-DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"
+    )
+    add_test(NAME run_test_QFINDTESTDATA COMMAND sh -c "cd \"${CMAKE_SOURCE_DIR}/test_QFINDTESTDATA/build/tests\" && ./test_QFINDTESTDATA -v2")
+
+    set_property(TEST run_test_QFINDTESTDATA
+        PROPERTY DEPENDS test_QFINDTESTDATA
+    )
+endif()
+
 if (NOT NO_DBUS)
     expect_pass(test_dbus_module)
 endif()

tests/auto/cmake/test_QFINDTESTDATA/CMakeLists.txt

@@ -0,0 +1,11 @@
+
+cmake_minimum_required(VERSION 2.8.11)
+
+project(test_QFINDTESTDATA)
+
+find_package(Qt5Test REQUIRED)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+add_subdirectory(tests)

tests/auto/cmake/test_QFINDTESTDATA/tests/CMakeLists.txt

@@ -0,0 +1,4 @@
+
+add_executable(test_QFINDTESTDATA WIN32 main.cpp)
+
+target_link_libraries(test_QFINDTESTDATA Qt5::Test)

tests/auto/cmake/test_QFINDTESTDATA/tests/main.cpp

@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Stephen Kelly <steveire@gmail,com>
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QCoreApplication>
+#include <QtTest/QTest>
+
+class TestClass : public QObject
+{
+  Q_OBJECT
+public:
+  TestClass(QObject* parent = 0) {}
+
+private slots:
+  void doTest();
+};
+
+void TestClass::doTest()
+{
+    QFile f(QFINDTESTDATA("testdata.txt"));
+    QVERIFY(f.open(QFile::ReadOnly));
+    QCOMPARE(f.readAll().trimmed(), QByteArrayLiteral("This is a test."));
+}
+
+QTEST_MAIN(TestClass)
+#include "main.moc"

tests/auto/cmake/test_QFINDTESTDATA/tests/testdata.txt

@@ -0,0 +1 @@
+This is a test.