tests: Add program dir to path, Custom PyConfig with argv

Author: arman-novikov

tests/test_embed/test_interpreter.cpp

@@ -180,6 +180,44 @@ TEST_CASE("Custom PyConfig") {
     }
     py::initialize_interpreter();
 }
+
+TEST_CASE("Custom PyConfig with argv") {
+    py::finalize_interpreter();
+    {
+        PyConfig config;
+        PyConfig_InitPythonConfig(&config);
+        config.install_signal_handlers = 1;
+        char *argv[] = {strdup("a.out")};
+        py::scoped_interpreter argv_scope{&config, 1, argv};
+        std::free(argv[0]);
+        auto module = py::module::import("test_interpreter");
+        auto py_widget = module.attr("DerivedWidget")("The question");
+        const auto &cpp_widget = py_widget.cast<const Widget &>();
+        REQUIRE(cpp_widget.argv0() == "");
+    }
+    py::initialize_interpreter();
+
+}
+
+TEST_CASE("Add program dir to path") {
+    static auto get_sys_path_size = []() -> size_t {
+        auto sys_path = py::module::import("sys").attr("path");
+        return py::len(sys_path);
+    };
+    py::finalize_interpreter();
+    PyConfig config;
+    PyConfig_InitPythonConfig(&config);
+    size_t sys_path_default_size;
+    {
+        py::scoped_interpreter scoped_interp{&config, 0, nullptr, false};
+        sys_path_default_size = get_sys_path_size();
+    }
+    {
+        py::scoped_interpreter scoped_interp{&config}; // expected to append 1 elem to sys.path
+        REQUIRE(get_sys_path_size() == sys_path_default_size + 1);
+    }
+    py::initialize_interpreter();
+}
 #endif
 
 bool has_pybind11_internals_builtin() {
@@ -412,4 +450,4 @@ TEST_CASE("make_iterator can be called before then after finalizing an interpret
     }());
 
     py::initialize_interpreter();
-}
+}