Adds a testsuite to Time API.

lib/utils/TimeUtils.dart

@@ -1,3 +1,5 @@
+import 'package:libac_flutter/nbt/Stream.dart';
+
 class Time {
   int hours;
   int minutes;
@@ -119,4 +121,14 @@ class Time {
 
     return Time(hours: hours, minutes: minutes, seconds: seconds);
   }
+
+  @override
+  String toString() {
+    StringBuilder builder = StringBuilder();
+    if (hours > 0) builder.append("${hours}h");
+    if (minutes > 0) builder.append("${minutes}m");
+    if (seconds > 0) builder.append("${seconds}s");
+
+    return "${builder}";
+  }
 }

test/time_test.dart

@@ -0,0 +1,23 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:libac_flutter/utils/TimeUtils.dart';
+
+void main() {
+  test("Parse time notation", () {
+    Time time = Time.fromNotation("4h9s");
+
+    expect(time.toString(), "4h9s");
+    expect(time.hours, 4);
+    expect(time.minutes, 0);
+    expect(time.seconds, 9);
+  });
+
+  test("Add time", () {
+    // Depends on first test working!
+    Time time = Time.fromNotation("4h9s");
+    time.add(Time(hours: 0, minutes: 80, seconds: 1));
+
+    expect(time.hours, 5);
+    expect(time.minutes, 20);
+    expect(time.seconds, 10);
+  });
+}