A quick and dirty test with doctest. Should be good enough.

meson.build

@@ -20,6 +20,7 @@ fmt = dependency('fmt')
 ftxui_screen = dependency('ftxui-screen')
 ftxui_dom = dependency('ftxui-dom')
 ftxui_component = dependency('ftxui-component')
+doctest = dependency('doctest')
 
 dependencies = [
   fmt, libgit2package_dep, efsw_dep,
@@ -38,3 +39,7 @@ executable('ftxtest', 'ftxtest.cpp',
 
 executable('ftx_thread_test', 'ftx_thread_test.cpp',
   dependencies: dependencies)
+
+executable('tests', [
+  'tests/test1.cpp'],
+  dependencies: dependencies + [doctest])

tests/test1.cpp

@@ -0,0 +1,11 @@
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+
+int factorial(int number) { return number <= 1 ? number : factorial(number - 1) * number; }
+
+TEST_CASE("testing the factorial function") {
+    CHECK(factorial(1) == 1);
+    CHECK(factorial(2) == 2);
+    CHECK(factorial(3) == 6);
+    CHECK(factorial(10) == 3628800);
+}