Record a group's weight through weigh() alone

src/expiring-groups.ts

@@ -54,10 +54,9 @@ export class ExpiringGroups<T> {
 	}
 
 	/** Starts the group's deadline, and the sweeper if this is the only group held. */
-	set(key: string, group: T, weight = 0): void {
+	set(key: string, group: T): void {
 		this.remove(key);
-		this.entries.set(key, { deadline: this.now() + this.timeout, group, weight });
-		this.total += weight;
+		this.entries.set(key, { deadline: this.now() + this.timeout, group, weight: 0 });
 
 		if (this.sweeper) return;
 

src/held-messages.ts

@@ -106,7 +106,8 @@ export class HeldMessages {
 			this.log.warn('heldMessages - replacing a message on a re-used sequence number', { seqNr: Number(key) });
 		}
 
-		this.held.set(key, pduObjs, pduObjs.reduce((sum, pduObj) => sum + retainedOctets(pduObj), 0));
+		this.held.set(key, pduObjs);
+		this.held.weigh(key, pduObjs.reduce((sum, pduObj) => sum + retainedOctets(pduObj), 0));
 
 		return hold;
 	}

test/session-extras.test.ts

@@ -1508,6 +1508,7 @@ describe('held message bounds', () => {
 		held.hold(message(2), 1);
 
 		assert.equal(held.size, 2);
+		assert.equal(held.octetsHeld, 2 * 1026, 'the replaced message leaves its octets with it');
 		assert.equal(held.full(), true);
 		assert.equal(first.isHeld(), true);