2 files changed, 112 insertions, 0 deletions
diff --git a/tests/manual/cmake/test_copy_file_if_different_command/CMakeLists.txt b/tests/manual/cmake/test_copy_file_if_different_command/CMakeLists.txt
new file mode 100644
index 0000000000..7e00b98888
--- /dev/null
+++ b/tests/manual/cmake/test_copy_file_if_different_command/CMakeLists.txt
@@ -0,0 +1,76 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+# How to run the test:
+# 1. Create the build directory, e.g. /home/user/build_test_copy_file_if_different
+# 2. cd /home/user/build_test_copy_file_if_different
+# 3. /path/to/Qt/bin/qt-cmake /path/to/Qt/Sources/qtbase/tests/manual/cmake/test_copy_file_if_different_command
+# 4. cmake --build . --parallel
+# 5. ctest
+cmake_minimum_required(VERSION 3.16)
+
+project(test_copy_file_if_different_command
+    LANGUAGES CXX
+)
+
+if(NOT CMAKE_HOST_WIN32)
+    message("Test only applicable for WIN32 platform. Nothing to do.")
+    return()
+endif()
+
+if(CMAKE_CROSSCOMPILING)
+    message("Test should only be run on host system. Crosscompiling is not supported.")
+    return()
+endif()
+
+find_program(fsutil NAMES fsutil fsutil.exe)
+if(NOT fsutil)
+    message(WARNING "Unable to find 'fsutil' executable. Skipping the test")
+    return()
+endif()
+
+find_package(Qt6 REQUIRED COMPONENTS Core)
+
+function(test_copy_file_command output_file test_data_base_name size)
+    set(testdatasrc1 "${CMAKE_CURRENT_BINARY_DIR}/${test_data_base_name}1.bin")
+    set(testdatasrc2 "${CMAKE_CURRENT_BINARY_DIR}/${test_data_base_name}2.bin")
+    set(testdatadst "${CMAKE_CURRENT_BINARY_DIR}/${test_data_base_name}.bin")
+
+    # Remove existing data first
+    file(REMOVE "${testdatasrc1}" "${testdatasrc2}" "${testdatadst}")
+
+    file(TO_NATIVE_PATH "${testdatasrc1}" native_testdatasrc)
+    execute_process(COMMAND ${fsutil} file createNew "${native_testdatasrc}" ${size}
+        RESULT_VARIABLE result)
+    if(NOT result EQUAL 0)
+        message(FATAL_ERROR "Unable to allocate file ${native_testdatasrc}"
+            " of size ${size} for test"
+        )
+    endif()
+
+    execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${testdatasrc1}" "${testdatasrc2}"
+        RESULT_VARIABLE result)
+    if(NOT result EQUAL 0)
+        message(FATAL_ERROR "Unable to copy test data from ${testdatasrc1} to ${testdatasrc2}")
+    endif()
+
+    foreach(src_file_num RANGE 1 2)
+        set(src_file "${testdatasrc${src_file_num}}")
+        file(APPEND "${src_file}" "${src_file_num}")
+        _qt_internal_copy_file_if_different_command(copy_command "${src_file}" "${testdatadst}")
+        execute_process(COMMAND ${copy_command} RESULT_VARIABLE result)
+        if(NOT result EQUAL 0)
+            message(FATAL_ERROR "Unable to execute the copy command ${copy_command}")
+        endif()
+    endforeach()
+
+    set(${output_file} "${testdatadst}" PARENT_SCOPE)
+endfunction()
+
+test_copy_file_command(output_file1K testdata1K 1024)
+test_copy_file_command(output_file2GB testdata2GB 2147483648)
+
+add_executable(test_copy_if_different_command main.cpp)
+
+enable_testing()
+add_test(NAME "test_copy_if_different_command" COMMAND test_copy_if_different_command "${output_file1K}" "${output_file2GB}")
diff --git a/tests/manual/cmake/test_copy_file_if_different_command/main.cpp b/tests/manual/cmake/test_copy_file_if_different_command/main.cpp
new file mode 100644
index 0000000000..eeb641a36b
--- /dev/null
+++ b/tests/manual/cmake/test_copy_file_if_different_command/main.cpp
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <fstream>
+#include <iostream>
+
+int checkFileLastByte(const std::string &filename, std::fstream::off_type offset)
+{
+    std::ifstream file(filename, std::ios_base::in);
+    if (!file.is_open()) {
+        std::cerr << "Unable to open test data file: " << filename << std::endl;
+        return 1;
+    }
+    file.seekg(offset, std::ios_base::beg);
+    char data = 0;
+    file.read(&data, sizeof(data));
+    if (data != '2') { // We always expect it's the second copy of the file
+        std::cerr << "Invalid data inside the file: " << filename << std::endl;
+        return 2;
+    }
+
+    return 0;
+};
+
+int main(int argc, char *argv[])
+{
+    if (argc != 3) {
+        std::cerr << "Test requires exact 2 arguments that point to the test data" << std::endl;
+        return 1;
+    }
+
+    int result = checkFileLastByte(argv[1], 1024);
+    if (result != 0)
+        return result;
+    return checkFileLastByte(argv[2], 2147483648);
+}