Tests: Activity driven model test WIP

test/res/2_agents_activity_prob.toml

@@ -0,0 +1,27 @@
+[simulation]
+model = "ActivityDriven"
+rng_seed = 120 # Leaving this empty will pick a random seed
+
+[io]
+n_output_network = 1 # Write the network every 20 iterations
+n_output_agents = 1
+print_progress = true # Print the iteration time ; if not set, then always print
+
+[model]
+max_iterations = 2 # If not set, max iterations is infinite
+
+[ActivityDriven]
+dt = 0.01               # Timestep for the integration of the coupled ODEs
+m = 1                  # Number of agents contacted, when the agent is active
+eps = 1              # Minimum activity epsilon; a_i belongs to [epsilon,1]
+gamma = 2.1             # Exponent of activity power law distribution of activities
+reciprocity = 1       # probability that when agent i contacts j via weighted reservoir sampling, j also sends feedback to i. So every agent can have more than m incoming connections
+homophily = 0.5         # aka beta. if zero, agents pick their interaction partners at random
+alpha = 3.0             # Controversialness of the issue, must be greater than 0.
+K = 3.0                 # Social interaction strength
+mean_activities = false # Use the mean value of the powerlaw distribution for the activities of all agents
+mean_weights = false    # Use the meanfield approximation of the network edges
+
+[network]
+number_of_agents = 2
+connections_per_agent = 1

test/test_activity.cpp

@@ -7,8 +7,7 @@
 #include <simulation.hpp>
 namespace fs = std::filesystem;
 
-#include <fmt/format.h>
-#include <fmt/ostream.h>
+#include <util/io.hpp>
 
 TEST_CASE(
     "Test that you can produce output for the probabilistic acitivity driven model, from a conf file",
@@ -39,4 +38,27 @@ TEST_CASE(
 
     // Cleanup
     fs::remove_all( output_dir_path );
+}
+
+TEST_CASE( "Test the probabilistic activity driven model for two agents", "[activityProbTwoAgents]" )
+{
+    using namespace Seldon;
+    using namespace Catch::Matchers;
+
+    auto proj_root_path = fs::current_path();
+    auto input_file     = proj_root_path / fs::path( "test/res/2_agents_activity_prob.toml" );
+
+    auto options = Config::parse_config_file( input_file.string() );
+
+    auto simulation = Simulation( options, std::nullopt, std::nullopt );
+
+    // We need an output path for Simulation, but we won't write anything out there?
+    fs::path output_dir_path = proj_root_path / fs::path( "test/output" );
+    fs::create_directories( output_dir_path );
+
+    // Zero step
+    auto filename = fmt::format( "opinions_{}.txt", 0 );
+    Seldon::IO::opinions_to_file( simulation, ( output_dir_path / fs::path( filename ) ).string() );
+
+    simulation.run( output_dir_path );
 }