CMake: Add test for uic handling

Add a test for uic handling and make it pass.

Change-Id: I7e11f9f1fba0e40c748e3590a0d0cbb72c9ebc28
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

6 files changed, 82 insertions, 0 deletions

diff --git a/cmake/tests/CMakeLists.txt b/cmake/tests/CMakeLists.txt
index 6b53c9703d..dd268bf254 100644
--- a/cmake/tests/CMakeLists.txt
+++ b/cmake/tests/CMakeLists.txt
@@ -46,3 +46,4 @@ endmacro()
 
 add_cmake_test_generate(features)
 add_cmake_test_generate(qt_make_output_file)
+add_cmake_test_generate(uic)
diff --git a/cmake/tests/empty.cpp b/cmake/tests/empty.cpp
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/cmake/tests/empty.cpp
diff --git a/cmake/tests/test.cmake b/cmake/tests/test.cmake
new file mode 100644
index 0000000000..8c11b3a42e
--- /dev/null
+++ b/cmake/tests/test.cmake
@@ -0,0 +1,50 @@
+# FAKE moc-ing:
+set(QT_MOCSCANNER /usr/bin/true)
+
+# Fake mocscanner run.
+# The files passed in after MOC will be reported to be in need of moc-ing,
+# but will not be built.
+# The files passed in after MOC_AND_BUILD will be reported to be in need
+# of moc-ing and should also be built by the target.
+function(fake_moc_results)
+    cmake_parse_arguments(arg "" "" "INCLUDED;BUILT")
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/moc_files_included.txt" "${arg_INCLUDED}")
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/moc_files_to_build.txt" "${arg_BUILT}")
+endfunction()
+
+# Test whether a target has a file listed in its sources.
+# Tests with the BUILD flag set will require this file to be built,
+# while those without will require the file to not be built by
+# the target.
+function(test_source_file target file)
+    cmake_parse_arguments(arg "BUILD" "" "" ${ARGN})
+
+    get_target_property(sources "${target}" SOURCES)
+    list(FIND sources "${file}" source_pos)
+    assert(NOT source_pos STREQUAL "-1")
+
+    get_source_file_property(prop "${file}" HEADER_FILE_ONLY)
+    if (arg_BUILD)
+        assert(NOT prop)
+    else()
+        assert(prop)
+    endif()
+endfunction()
+
+# Test whether or not a target uses a header path
+# The test passes when the path is in the list of include directories.
+# Passing 'UNKNOWN' to this function reverses the test result.
+function(test_include_directory target path)
+    cmake_parse_arguments(arg "UNKNOWN" "" "" ${ARGN})
+    get_target_property(includes "${target}" INCLUDE_DIRECTORIES)
+    list(FIND includes "${path}" include_pos)
+    if(arg_UNKNOWN)
+        assert(include_pos STREQUAL "-1")
+    else()
+        assert(NOT include_pos STREQUAL "-1")
+    endif()
+endfunction()
+
+# Add Core and Qt::Core libraries:
+add_library(Core SHARED "${CMAKE_CURRENT_LIST_DIR}/empty.cpp")
+add_library(Qt::Core ALIAS Core)
diff --git a/cmake/tests/uic/CMakeLists.txt b/cmake/tests/uic/CMakeLists.txt
new file mode 100644
index 0000000000..b8455821de
--- /dev/null
+++ b/cmake/tests/uic/CMakeLists.txt
@@ -0,0 +1,31 @@
+cmake_minimum_required(VERSION 3.12.0)
+
+project(UicTest
+    VERSION 1.0.0
+    DESCRIPTION "Uic test"
+    HOMEPAGE_URL "https://qt.io/"
+    LANGUAGES CXX
+)
+
+## Add some paths to check for cmake modules:
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/../../;${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/extra-cmake-modules/find-modules;${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/kwin")
+
+## Qt specific setup common for all modules:
+include(QtSetup)
+
+include(../test.cmake)
+
+fake_moc_results()
+add_qt_executable(test_executable
+  SOURCES
+    ../main.cpp
+    window.ui
+)
+
+fake_moc_results()
+extend_target(test_executable SOURCES dialog/dialog.ui)
+
+test_source_file(test_executable "${CMAKE_CURRENT_BINARY_DIR}/ui_window.h")
+test_source_file(test_executable "${CMAKE_CURRENT_BINARY_DIR}/dialog/ui_dialog.h")
+
+test_include_directory(test_executable "${CMAKE_CURRENT_BINARY_DIR}/dialog")
diff --git a/cmake/tests/uic/dialog/dialog.ui b/cmake/tests/uic/dialog/dialog.ui
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/cmake/tests/uic/dialog/dialog.ui
diff --git a/cmake/tests/uic/window.ui b/cmake/tests/uic/window.ui
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/cmake/tests/uic/window.ui