NetworkGeneration: Added this to test directory

This is actually part of Seldon, but some functions here could be useful
for testing. Also axed the main.cpp. Will use catch2 tests for testing.

graph_lib/include/directed_network.hpp

@@ -2,7 +2,7 @@
 #include "network_base.hpp"
 #include <utility>
 
-namespace Seldon {
+namespace Graph {
 
 /*
     A class that represents a directed graph using adjacency lists.
@@ -228,4 +228,4 @@ class DirectedNetwork : public NetworkBase<AgentType, WeightType> {
   EdgeDirection _direction{};
 };
 
-} // namespace Seldon
+} // namespace Graph

meson.build

@@ -7,21 +7,20 @@ compiler = meson.get_compiler('cpp')
 inc = include_directories('graph_lib/include')
 graphlib_dep = declare_dependency(include_directories : inc)
 
-exe_verification = executable('exe', 'verification/main.cpp',
-  install : true,
-  include_directories : inc
-  )
-
 tests = [
   ['Test', 'test/test.cpp'],
 ]
 
+test_inc = []
+test_inc += inc
+test_inc += 'test/util'
+
 Catch2 = dependency('Catch2', method : 'cmake', modules : ['Catch2::Catch2WithMain', 'Catch2::Catch2'])
 
 foreach t : tests
   exe = executable(t.get(0), t.get(1),
     dependencies : [Catch2],
-    include_directories : inc
+    include_directories : test_inc
   )
   test(t.get(0), exe, workdir : meson.project_source_root())
 endforeach

test/test.cpp

@@ -1,4 +1,5 @@
 #include "undirected_network.hpp"
+#include "util/network_generation.hpp"
 #include <catch2/catch_test_macros.hpp>
 #include <catch2/matchers/catch_matchers_range_equals.hpp>
 #include <cstddef>