Re added the batch size argument

In preparation for the use of the set generation tactic I mentioned
for better load balancing in the children

include/config/Config.h

@@ -55,6 +55,7 @@ class Config {
   // Config int getters.
   int64_t getTimeout() const { return timeout; }
   int64_t getNumThreads() const { return numThreads; }
+  int8_t getBatchSize() const { return batchSize; }
 
   // Initialisation verification.
   bool isInitialised() const { return initialised; }
@@ -88,6 +89,7 @@ class Config {
   // Number of threads on which to run tests
   int64_t numThreads;
   // Number of tests for each thread to grab on each run
+  int8_t batchSize;
 
   // Is the config initialised or not and an appropriate error code. This
   // could be due to asking for help or a missing config file.

src/config/Config.cpp

@@ -17,7 +17,7 @@ using JSON = nlohmann::json;
 
 namespace tester {
 
-Config::Config(int argc, char** argv) : timeout(2l), numThreads(1) {
+Config::Config(int argc, char** argv) : timeout(2l), numThreads(1), batchSize(5) {
 
   CLI::App app{"CMPUT 415 testing utility"};
 
@@ -40,6 +40,7 @@ Config::Config(int argc, char** argv) : timeout(2l), numThreads(1) {
 
   // multithreading options
   app.add_option("-j", numThreads, "The number of threads on which to execute tests.");
+  app.add_option("--batch-size", batchSize, "(ADVANCED) the number of tests for each thread to grab per iteration. (default = 5)");
 
   // Enforce that if a grade path is supplied, then a log file should be as well and vice versa
   gradeOpt->needs(solutionFailureLogOpt);