[FIX] tmp_directory snippet has no main()

test/snippet/test/tmp_directory.cpp

@@ -2,15 +2,13 @@
 // SPDX-FileCopyrightText: 2016-2024, Knut Reinert & MPI für molekulare Genetik
 // SPDX-License-Identifier: CC0-1.0
 
-#include <gtest/gtest.h> // for Test, AssertionResult, TestInfo, EXPECT_TRUE, Message, TEST, TestPar...
-
 #include <filesystem> // for remove
 #include <fstream>    // for char_traits, operator<<, basic_ostream, ofstream
 
 #include <hibf/test/sandboxed_path.hpp> // for operator/, sandboxed_path
 #include <hibf/test/tmp_directory.hpp>  // for tmp_directory
 
-TEST(snippet_tmp_directory, tmp_directory_)
+int main()
 {
     // create a directory folder
     seqan::hibf::test::tmp_directory tmp{};
@@ -24,6 +22,6 @@ TEST(snippet_tmp_directory, tmp_directory_)
         std::filesystem::remove(tmp.path() / "somefile.txt");
     }
 
-    // check that everything was cleanup properly
-    EXPECT_TRUE(tmp.empty());
+    // check that everything was cleaned up properly
+    assert(tmp.empty());
 }