make catch2 a submodule

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "external/ghc-filesystem"]
 	path = external/ghc-filesystem
 	url = https://github.com/gulrak/filesystem.git
+[submodule "test/Catch2"]
+	path = test/Catch2
+	url = https://github.com/catchorg/Catch2

test/CMakeLists.txt

@@ -77,12 +77,14 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
   target_link_directories(${TEST_EXE} PRIVATE /usr/local/lib)
 endif()
 
+add_subdirectory(Catch2)
+
 add_executable(${CHECK_EXE}
   nodedb/test_nodedb.cpp
   path/test_path.cpp
   check_main.cpp)
 
-target_link_libraries(${CHECK_EXE} PUBLIC ${STATIC_LIB})
+target_link_libraries(${CHECK_EXE} PUBLIC ${STATIC_LIB} Catch2::Catch2)
 target_include_directories(${CHECK_EXE} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
 
 add_custom_target(check COMMAND ${CHECK_EXE})

test/Catch2

@@ -0,0 +1 @@
+Subproject commit 81d52c4a5ffc1e527ce158c7570aa94dadc8c002

test/check_main.cpp

@@ -1,2 +1,2 @@
 #define CATCH_CONFIG_MAIN
-#include "catch.hpp"
+#include <catch2/catch.hpp>

test/nodedb/test_nodedb.cpp

@@ -1,4 +1,4 @@
-#include "catch.hpp"
+#include <catch2/catch.hpp>
 #include "config/config.hpp"
 
 #include <router_contact.hpp>
@@ -6,11 +6,10 @@
 
 TEST_CASE("FindClosestTo returns correct number of elements", "[nodedb][dht]")
 {
-
   llarp_nodedb nodeDB(nullptr, "");
 
   constexpr uint64_t numRCs = 3;
-  for (uint64_t i=0; i<numRCs; ++i)
+  for(uint64_t i = 0; i < numRCs; ++i)
   {
     llarp::RouterContact rc;
     rc.pubkey[0] = i;
@@ -29,7 +28,6 @@ TEST_CASE("FindClosestTo returns correct number of elements", "[nodedb][dht]")
 
 TEST_CASE("FindClosestTo returns properly ordered set", "[nodedb][dht]")
 {
-
   llarp_nodedb nodeDB(nullptr, "");
 
   // insert some RCs: a < b < c
@@ -65,4 +63,3 @@ TEST_CASE("FindClosestTo returns properly ordered set", "[nodedb][dht]")
   REQUIRE(c.pubkey == results[0].pubkey);
   REQUIRE(b.pubkey == results[1].pubkey);
 }
-

test/path/test_path.cpp

@@ -1,5 +1,5 @@
 #include <path/path.hpp>
-#include "catch.hpp"
+#include <catch2/catch.hpp>
 
 using Path_t   = llarp::path::Path;
 using Path_ptr = llarp::path::Path_ptr;