add a couple more tests

SimpleTimer/tests/TestEnableDisable/TestEnableDisable.ino

@@ -0,0 +1,42 @@
+#include <ArduinoUnit.h>
+#include <SimpleTimer.h>
+
+// if when calling disable(), the timer callback doesn't get executed.
+
+// the timer object
+SimpleTimer timer;
+
+bool all_done = false;
+
+int counter = 0;
+
+void callMeOnce() {
+    Serial.print("callMeOnce: counter=");
+    counter++;
+    Serial.println(counter);
+}
+
+void setup() {
+    Serial.begin(9600);
+
+    for (int i = 0; i < timer.MAX_TIMERS; i++) {
+        int id = timer.setTimer(10, callMeOnce, 1);
+        assertNotEqual(id, -1);
+    }
+
+    int id = timer.setTimer(10, callMeOnce, 1);
+    assertEqual(id, -1);
+
+    timer.disable(4);
+
+    assertEqual(timer.getNumTimers(), timer.MAX_TIMERS);
+}
+
+void loop() {
+    timer.run();
+
+    if (counter == (timer.MAX_TIMERS - 1)) {
+        Serial.println("Tests finished.");
+        while (true);
+    }
+}

SimpleTimer/tests/TestFillTimerTable/TestFillTimerTable.ino

@@ -0,0 +1,37 @@
+#include <ArduinoUnit.h>
+#include <SimpleTimer.h>
+
+// the timer object
+SimpleTimer timer;
+
+bool all_done = false;
+
+int counter = 0;
+
+void callMeOnce() {
+    Serial.print("callMeOnce: counter=");
+    counter++;
+    Serial.println(counter);
+}
+
+void setup() {
+    Serial.begin(9600);
+
+    for (int i = 0; i < timer.MAX_TIMERS; i++) {
+        int id = timer.setTimer(10, callMeOnce, 1);
+        assertNotEqual(id, -1);
+    }
+
+    int id = timer.setTimer(10, callMeOnce, 1);
+    assertEqual(id, -1);
+    assertEqual(timer.getNumTimers(), timer.MAX_TIMERS);
+}
+
+void loop() {
+    timer.run();
+
+    if (counter == timer.MAX_TIMERS) {
+        Serial.println("Tests finished.");
+        while (true);
+    }
+}