Implement Sequence.reset()

assets/js/sequence.mjs

@@ -1,10 +1,17 @@
 "use strict";
 
 export default class Sequence {
+  // Made public to make tests easier
   static value = 0;
 
   static next() {
-    Sequence.value += 1;
-    return Sequence.value;
+    $.value += 1;
+    return $.value;
+  }
+
+  static reset() {
+    $.value = 0;
   }
 }
+
+const $ = Sequence;

test/javascript/sequence_test.mjs

@@ -18,4 +18,11 @@ describe("Sequence", () => {
     assert.equal(Sequence.next(), 1);
     assert.equal(Sequence.next(), 2);
   });
+
+  it("reset()", () => {
+    Sequence.value = 123;
+    Sequence.reset();
+
+    assert.equal(Sequence.value, 0);
+  });
 });