All all unit test call

Makefile

@@ -18,3 +18,25 @@ doc:
 	cd doc/doxygen && doxygen
 	$(MAKE) -C doc html
 
+
+# Iterate through each directory in the unit_tests directory and compile the test files
+# then run them
+test:
+	@echo "Running tests ..."
+	@set -e; \
+	for dir in $(wildcard unit_tests/*); do \
+		if [ -d $$dir ]; then \
+			echo "Entering directory $$dir"; \
+			if $(MAKE) -C $$dir; then \
+				if [ -f "$$dir/rebound" ]; then \
+					(cd $$dir && LD_LIBRARY_PATH=$(REB_DIR):. ./rebound); \
+				else \
+					echo "No rebound executable found in $$dir"; \
+					exit 1; \
+				fi \
+			else \
+				echo "Make failed in $$dir"; \
+				exit 1; \
+			fi \
+		fi \
+	done

src/assist.c

@@ -416,17 +416,14 @@ void assist_integrate_or_interpolate(struct assist_extras* ax, double t){
     if ( !(dts*(sim->t-sim->dt_last_done)  <  dts*t &&  dts*t < dts*sim->t) ){
         // Integrate if requested time not in interval of last timestep
 
-        // reb_simulation_integrate(sim, t);
-
-        // Use reb_simulation_step(r) until t is reached
-        while (sim->t < t){
-            reb_simulation_step(sim);
-            fprintf(stderr, "sim->t: %.17e\n", sim->t);
-            fprintf(stderr, "dt: %.17e\n", sim->dt);
-            fprintf(stderr, "dt_last_done: %.17e\n", sim->dt_last_done);
-        }
+        reb_simulation_integrate(sim, t);
+
     }
 
+    fprintf(stderr, "sim->t: %.17e\n", sim->t);
+    fprintf(stderr, "dt: %.17e\n", sim->dt);
+    fprintf(stderr, "dt_last_done: %.17e\n", sim->dt_last_done);
+    fprintf(stderr, "t: %.17e\n", t);
     double h = 1.0-(sim->t -t) / sim->dt_last_done; 
     if (sim->t - t==0.){
         memcpy(ax->current_state, sim->particles, sizeof(struct reb_particle)*sim->N);