From 92e0480d9d209ddf2f5f416ac0a267e47e621162 Mon Sep 17 00:00:00 2001
From: Thomas Debrunner <thomas.debrunner@auterion.com>
Date: Tue, 2 Apr 2024 15:06:54 +0200
Subject: [PATCH] make tests build under mingw

---
 cmake/toolchain-mingw64.cmake | 17 +++++++++++++++++
 tests/CMakeLists.txt          |  6 ++++++
 tests/MessageSet.cpp          | 16 ++++++++++++++++
 tests/test_main.cpp           |  1 +
 4 files changed, 40 insertions(+)
 create mode 100644 cmake/toolchain-mingw64.cmake

diff --git a/cmake/toolchain-mingw64.cmake b/cmake/toolchain-mingw64.cmake
new file mode 100644
index 0000000..cb3e5fa
--- /dev/null
+++ b/cmake/toolchain-mingw64.cmake
@@ -0,0 +1,17 @@
+# the name of the target operating system
+set(CMAKE_SYSTEM_NAME Windows)
+
+# which compilers to use for C and C++
+set(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc-posix)
+set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++-posix)
+
+# here we specify the root directory of the target environment
+set(CMAKE_FIND_ROOT_PATH /usr/x86_64-w64-mingw32)
+
+# adjust the default behaviour of the FIND_ commands:
+# search programs in the host environment
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# for libraries and headers in the target environment
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a46f263..9f97c3e 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -14,3 +14,9 @@ target_compile_options(tests PRIVATE -O0 -g --coverage -Wall -Wextra -pedantic)
 target_link_options(tests PRIVATE --coverage)
 target_include_directories(tests PRIVATE ../include)
 target_link_libraries(tests PRIVATE Threads::Threads)
+
+if(WIN32)
+    message(STATUS "Building for Windows")
+    add_compile_definitions(WINVER=0x0601 _WIN32_WINNT=0x0601) # require at least Windows 7
+    target_link_libraries(tests PRIVATE wsock32 ws2_32)
+endif()
diff --git a/tests/MessageSet.cpp b/tests/MessageSet.cpp
index 46093ed..e37de35 100644
--- a/tests/MessageSet.cpp
+++ b/tests/MessageSet.cpp
@@ -9,6 +9,7 @@
 
 using namespace mav;
 
+#ifndef _NO_STD_FILESYSTEM
 std::string dump_minimal_xml() {
     // write temporary file
     auto temp_path = std::filesystem::temp_directory_path();
@@ -18,12 +19,20 @@ std::string dump_minimal_xml() {
     out.close();
     return xml_file.u8string();
 }
+#endif
 
 TEST_CASE("Message set creation") {
 
+#ifndef _NO_STD_FILESYSTEM
+    // test loading from file for systems with std::filesystem
     auto file_name = dump_minimal_xml();
     MessageSet message_set{file_name};
     std::remove(file_name.c_str());
+#else
+    // just load from the string for systems without filesystem
+    MessageSet message_set;
+    message_set.addFromXMLString(minimal_xml);
+#endif
 
     CHECK_EQ(message_set.size(), 2);
 
@@ -65,9 +74,16 @@ TEST_CASE("Message set creation") {
 }
 
 TEST_CASE("Create messages from set") {
+#ifndef _NO_STD_FILESYSTEM
+    // test loading from file for systems with std::filesystem
     auto file_name = dump_minimal_xml();
     MessageSet message_set{file_name};
     std::remove(file_name.c_str());
+#else
+    // just load from the string for systems without filesystem
+    MessageSet message_set;
+    message_set.addFromXMLString(minimal_xml);
+#endif
 
     REQUIRE(message_set.contains("HEARTBEAT"));
     SUBCASE("Can create message from name") {
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 1058417..db6d3a8 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -2,4 +2,5 @@
 // Created by thomas on 01.02.23.
 //
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include <windows.h>
 #include "doctest.h"