AUTOUIC: Add test for cyclic dependency between UI headers and timestamp

Follow up test for the commit 9cebdbec.

Tests/QtAutogen/RerunUicOnFileChange/CMakeLists.txt

@@ -26,6 +26,7 @@ macro(rebuild buildName)
 endmacro()
 
 configure_file("${testProjectTemplateDir}/mocwidget.h" "${testProjectSrc}/mocwidget.h" COPYONLY)
+configure_file("${testProjectTemplateDir}/mainwindow.h" "${testProjectSrc}/mainwindow.h" COPYONLY)
 configure_file("${testProjectTemplateDir}/main.cpp" "${testProjectSrc}/main.cpp" COPYONLY)
 configure_file("${testProjectTemplateDir}/subdir/subdircheck.cpp" "${testProjectSrc}/subdir/subdircheck.cpp" COPYONLY)
 configure_file("${testProjectTemplateDir}/CMakeLists.txt.in" "${testProjectSrc}/CMakeLists.txt" @ONLY)
@@ -103,3 +104,15 @@ execute_process(COMMAND "${testProjectBinDir}/${extra_bin_path}UicOnFileChange"
 if(NOT result EQUAL "0")
   message(FATAL_ERROR "Rebuild of UicOnFileChange test result is: ${result}")
 endif()
+
+# Check if the generated ui_mainwindow.h rules introduce circular dependency between the generated
+# ui_mainwinow.h and timestamp.
+#
+# The first rebuild updates a timestamp dependency file after "touching" mainwindow.h.
+sleep()
+execute_process(COMMAND ${CMAKE_COMMAND} -E touch "${testProjectSrc}/mainwindow.h")
+rebuild(3)
+
+# The second rebuild detects if cycling dependency is introduced by deps file.
+sleep()
+rebuild(4)

Tests/QtAutogen/RerunUicOnFileChange/UicOnFileChange/CMakeLists.txt.in

@@ -5,9 +5,13 @@ include("@CMAKE_CURRENT_LIST_DIR@/../AutogenGuiTest.cmake")
 
 # Enable CMAKE_AUTOUIC for all targets
 set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
 
-add_executable(UicOnFileChange main.cpp mainwindow.ui
+add_executable(UicOnFileChange main.cpp mainwindow.ui mainwindow.h
     subdir/subdircheck.cpp subdir/mainwindowsubdir.ui
 )
-target_include_directories(UicOnFileChange PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(UicOnFileChange PRIVATE
+    "${CMAKE_CURRENT_SOURCE_DIR}"
+    "${CMAKE_CURRENT_BINARY_DIR}/UicOnFileChange_autogen/include"
+)
 target_link_libraries(UicOnFileChange ${QT_QTCORE_TARGET} ${QT_LIBRARIES})

Tests/QtAutogen/RerunUicOnFileChange/UicOnFileChange/main.cpp

@@ -1,3 +1,4 @@
+#include "mainwindow.h"
 #include "ui_mainwindow.h"
 
 extern bool subdircheck();

Tests/QtAutogen/RerunUicOnFileChange/UicOnFileChange/mainwindow.h

@@ -0,0 +1,13 @@
+#include <QObject>
+
+#include "ui_mainwindow.h"
+
+class MainWindow : public QObject
+{
+  Q_OBJECT
+public:
+  MainWindow() { mwUi.setupUi(&mw); }
+
+  MocWidget mw;
+  Ui::Widget mwUi;
+};