1 files changed, 80 insertions, 0 deletions
diff --git a/Tests/QtAutogen/RerunMocOnMissingDependency/CMakeLists.txt b/Tests/QtAutogen/RerunMocOnMissingDependency/CMakeLists.txt
new file mode 100644
index 0000000..c5811eb
--- /dev/null
+++ b/Tests/QtAutogen/RerunMocOnMissingDependency/CMakeLists.txt
@@ -0,0 +1,80 @@
+# This test checks whether a missing dependency of the moc output triggers an AUTOMOC re-run.
+
+cmake_minimum_required(VERSION 3.10)
+project(RerunMocOnMissingDependency)
+include("../AutogenCoreTest.cmake")
+
+# Create an executable to generate a clean target
+set(main_source "${CMAKE_CURRENT_BINARY_DIR}/generated_main.cpp")
+file(WRITE "${main_source}" "int main() {}")
+add_executable(exe "${main_source}")
+
+# Utility variables
+set(testProjectTemplateDir "${CMAKE_CURRENT_SOURCE_DIR}/MocOnMissingDependency")
+set(testProjectSrc "${CMAKE_CURRENT_BINARY_DIR}/MocOnMissingDependency")
+set(testProjectBinDir "${CMAKE_CURRENT_BINARY_DIR}/MocOnMissingDependency-build")
+if(DEFINED Qt5Core_VERSION AND Qt5Core_VERSION VERSION_GREATER_EQUAL "5.15.0")
+    set(moc_depfiles_supported TRUE)
+else()
+    set(moc_depfiles_supported FALSE)
+endif()
+
+# Utility macros
+macro(sleep)
+  message(STATUS "Sleeping for a few seconds.")
+  execute_process(COMMAND "${CMAKE_COMMAND}" -E sleep 1)
+endmacro()
+
+macro(rebuild buildName)
+  message(STATUS "Starting build ${buildName}.")
+  execute_process(COMMAND "${CMAKE_COMMAND}" --build . WORKING_DIRECTORY "${testProjectBinDir}"
+      RESULT_VARIABLE result OUTPUT_VARIABLE output)
+  if (result)
+    message(FATAL_ERROR "Build ${buildName} failed.")
+  else()
+    message(STATUS "Build ${buildName} finished.")
+  endif()
+endmacro()
+
+# Create the test project from the template
+file(COPY "${testProjectTemplateDir}" DESTINATION "${CMAKE_CURRENT_BINARY_DIR}")
+configure_file("${testProjectTemplateDir}/CMakeLists.txt.in" "${testProjectSrc}/CMakeLists.txt" @ONLY)
+
+# Initial build
+file(REMOVE_RECURSE "${testProjectBinDir}")
+try_compile(MOC_RERUN
+  "${testProjectBinDir}"
+  "${testProjectSrc}"
+  MocOnMissingDependency
+  CMAKE_FLAGS "-DQT_TEST_VERSION=${QT_TEST_VERSION}"
+              "-DCMAKE_AUTOGEN_VERBOSE=ON"
+              "-DQT_QMAKE_EXECUTABLE:FILEPATH=${QT_QMAKE_EXECUTABLE}"
+  OUTPUT_VARIABLE output
+)
+if (NOT MOC_RERUN)
+  message(FATAL_ERROR "Initial build of mocOnMissingDependency failed. Output: ${output}")
+endif()
+
+# Sleep to ensure new timestamps
+sleep()
+
+if(moc_depfiles_supported)
+    # Remove the dependency inc1/foo.h and build again.
+    # We expect that the moc_XXX.cpp file gets re-generated. But only if we have depfile support.
+    file(REMOVE_RECURSE "${testProjectSrc}/inc1")
+    rebuild(2)
+    if(NOT output MATCHES "AutoMoc: Generating \"[^\"]*moc_myobject.cpp\"")
+        message(FATAL_ERROR "moc_myobject.cpp was not re-generated "
+            "after removing one of its dependencies")
+    endif()
+endif()
+
+# Sleep to ensure new timestamps
+sleep()
+
+# The next build should *not* re-renerate any moc outputs
+rebuild(3)
+if(output MATCHES "AutoMoc: Generating")
+    message(FATAL_ERROR "moc_myobject.cpp was not re-generated "
+        "after removing one of its dependencies")
+endif()