feat: add mock application for testing

README.md

@@ -29,3 +29,12 @@ meson setup --cross-file=cross/i686-w64-mingw32.txt build
 # x86_64/64bit
 meson setup --cross-file=cross/x86_64-w64-mingw32.txt build
 ```
+
+## Mock Application
+
+A simple application for loading the built dll and calling the usual entrypoint
+with some sample text can optionally be built and started via meson.
+
+    meson configure build -Dbuild_mock=enabled
+    ninja -Cbuild run_mock
+    # build/mock/mock_textractor.exe <path to dll>

meson.build

@@ -1,5 +1,6 @@
 project('Textractor-TCPSender', 'cpp',
-  default_options : ['cpp_std=c++17'])
+  meson_version : '>=0.56.0',
+  default_options : ['cpp_std=c++17', 'warning_level=3'])
 
 add_project_arguments('-DUNICODE', language : 'cpp')
 
@@ -16,5 +17,10 @@ src += windows.compile_resources('TCPSender/resource.rc')
 deps = []
 deps +=  compiler.find_library('ws2_32')
 
-library('tcpsender', src,
+tcpsender = library('TCPSender', src,
+  name_prefix : '', name_suffix : 'xdll',
   dependencies : deps)
+
+if get_option('build_mock').enabled()
+  subdir('mock')
+endif

meson_options.txt

@@ -0,0 +1,2 @@
+option('build_mock', type : 'feature', value : 'disabled',
+  description : 'build a mock application using this Textractor extension')

mock/meson.build

@@ -0,0 +1,6 @@
+mock_exe = executable('mock_textractor', 'mock.cpp',
+  include_directories : '../TCPSender',
+  win_subsystem : 'windows')
+
+run_target('run_mock', command : [mock_exe, tcpsender.full_path()],
+  depends : tcpsender)

mock/mock.cpp

@@ -0,0 +1,67 @@
+#include "Extension.h"
+
+#include <chrono>
+#include <filesystem>
+#include <iostream>
+#include <string>
+#include <system_error>
+#include <thread>
+
+#include <cstdlib>
+#include <cwchar>
+
+#include <errhandlingapi.h>
+#include <libloaderapi.h>
+#include <winuser.h>
+
+using namespace std::chrono_literals;
+
+using std::cerr;
+using std::endl;
+
+namespace fs = std::filesystem;
+
+typedef wchar_t *(*entrypoint)(wchar_t *, const InfoForExtension *);
+
+int main(int argc, char *argv[])
+{
+        if (argc < 2) {
+                cerr << "err: no dll given; usage: " << argv[0] << " <dll>" << endl;
+                return 1;
+        }
+
+        auto const dll_path = fs::path(argv[1]).make_preferred();
+
+        cerr << "info: loading " << dll_path << endl;
+        HMODULE mod = LoadLibrary(dll_path.c_str());
+        if (mod == NULL) {
+                DWORD err = GetLastError();
+                auto err_msg = std::system_category().message(err);
+
+                cerr << "err: unable to load " << dll_path << ": [" << err << "] " << err_msg << endl;
+                return 2;
+        }
+        cerr << "info: success" << endl;
+
+        auto func = reinterpret_cast<entrypoint>(
+                        reinterpret_cast<void *>(
+                                GetProcAddress(mod, "OnNewSentence")
+                        )
+        );
+        if (func == NULL) {
+                cerr << "err: unable to find dll entrypoint" << endl;
+                return 3;
+        }
+
+        InfoForExtension info{"current select", 1};
+        wchar_t word[20];
+
+
+        while (IDOK == MessageBox(NULL, L"Send message?", L"Mock", MB_OKCANCEL)) {
+                std::wmemcpy(word, L"FOOBAR", 7); // swprintf non-conforming in mingw
+                cerr << "info: sending msg to dll" << endl;
+                func(word, &info);
+        }
+
+        return 0;
+}