- Adding StdOutLogger and adding tests for DAG execution to verify it works.

- Roughing in FileSystemLogger
- Deleting Scheduler code and associated unit tests as being too complicated for maintenance.
- Refactoring namespaces for loggers and executors.

tests/unit_utilities.cpp

@@ -6,9 +6,11 @@
 
 #include "daggy/Utilities.hpp"
 #include "daggy/Serialization.hpp"
+#include "daggy/executors/task/ForkingTaskExecutor.hpp"
+#include "daggy/loggers/dag_run/StdOutLogger.hpp"
 
 TEST_CASE("Parameter Expansion", "[utilities_parameter_expansion]") {
-    SECTION("Basic Parse") {
+    SECTION("Basic expansion") {
         std::string testParams{R"({"DATE": ["2021-05-06", "2021-05-07" ], "SOURCE": "name", "TYPE": ["a", "b", "c"]})"};
         auto params = daggy::parametersFromJSON(testParams);
         std::vector<std::string> cmd{"/usr/bin/echo", "{{DATE}}", "{{SOURCE}}", "{{TYPE}}"};
@@ -26,4 +28,16 @@ TEST_CASE("Parameter Expansion", "[utilities_parameter_expansion]") {
         // TYPE isn't used, so it's just |DATE| * |SOURCE|
         REQUIRE(allCommands.size() == 2);
     }
+}
+
+TEST_CASE("DAG Runner", "[utilities_dag_runner]") {
+    daggy::executors::task::ForkingTaskExecutor ex(10);
+    daggy::loggers::dag_run::StdOutLogger logger;
+
+    std::string taskJSON = R"([{"name": "A", "command": ["/bin/echo", "A"], "children": ["C"]}, {"name": "B", "command": ["/bin/echo", "B"], "children": ["C"]},{"name": "C", "command": ["/bin/echo", "C"]}])";
+    auto tasks = daggy::tasksFromJSON(taskJSON);
+    auto dag = daggy::buildDAGFromTasks(tasks);
+
+    auto runID = logger.startDAGRun("test_run", tasks);
+    daggy::runDAG(runID, tasks, ex, logger, dag);
 }