Add whereami test program

tests/meson.build

@@ -39,6 +39,14 @@ executable(
     include_directories: inc,
 )
 
+executable(
+    'nowide+whereami',
+    'nowide+whereami.cpp',
+    include_sources['whereami'],
+    dependencies: deps,
+    include_directories: inc,
+)
+
 executable(
     'scrollwheel',
     'scrollwheel.cpp',

tests/nowide+whereami.cpp

@@ -0,0 +1,41 @@
+#include <cstddef>
+#include <cstring>
+#include <filesystem>
+#include <iostream>
+
+#include <string>
+#include <nowide/args.hpp>
+#include <nowide/fstream.hpp>
+#include <nowide/iostream.hpp>
+#include <whereami++.hpp>
+
+template <class T>
+void check_file(T& file) {
+	if (not file) {
+        nowide::cerr << "Can't open file" << std::endl;
+        return;
+    }
+    std::size_t total_lines = 0;
+    while (file) {
+        if(file.get() == '\n') {
+            total_lines++;
+        }
+    }
+    nowide::cout << "File has " << total_lines << " lines" << std::endl;
+}
+
+int main() {
+    std::string executable_folder = whereami::executable_dir();
+    nowide::cout << "whereami::executable_dir() = " << executable_folder << std::endl;
+	
+    auto u8string = std::u8string(executable_folder.begin(), executable_folder.end());
+    nowide::cout << "std::u8string{_)} = " << reinterpret_cast<const char*>(u8string.c_str()) << std::endl;
+
+    std::filesystem::path u8path{u8string};
+    nowide::cout << "std::filesystem::path{_} = " << u8path << std::endl;
+
+	nowide::cout << "nowide::ifstream{_} : " << std::endl;
+	nowide::ifstream file_from_path(u8path / "test_file.txt");
+	check_file(file_from_path);
+    return 0;
+}