[Sui System] Better Test Framework 2/N (#22084)

## Description 

Continues the journey to better tests for the System, adds extra cases
on the way.

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] gRPC:
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

---------

Co-authored-by: Damir <damir@Damirs-MacBook-Pro.local>

Author: damirka

crates/sui-framework/packages/sui-system/tests/builders/test_runner.move

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #[test_only]
+#[allow(unused_const)]
 /// Validator Builder is a helper module which implements a builder pattern for
 /// creating a `Validator` or `ValidatorMetadata` struct.
 ///
@@ -33,12 +34,33 @@ const VALID_ADDRESS: address = @0xaf76afe6f866d8426d2be85d6ef0b11f871a251d043b2f
 const VALID_PUBKEY: vector<u8> = x"99f25ef61f8032b914636460982c5cc6f134ef1ddae76657f2cbfec1ebfc8d097374080df6fcf0dcb8bc4b0d8e0af5d80ebbff2b4c599f54f42d6312dfc314276078c1cc347ebbbec5198be258513f386b930d02c2749a803e2330955ebd1a10";
 // prettier-ignore
 const PROOF_OF_POSSESSION: vector<u8> = x"b01cc86f421beca7ab4cfca87c0799c4d038c199dd399fbec1924d4d4367866dba9e84d514710b91feb65316e4ceef43";
-
 const VALID_NET_ADDR: vector<u8> = b"/ip4/127.0.0.1/tcp/80";
 const VALID_P2P_ADDR: vector<u8> = b"/ip4/127.0.0.1/udp/80";
 const VALID_CONSENSUS_ADDR: vector<u8> = b"/ip4/127.0.0.1/udp/80";
 const VALID_WORKER_ADDR: vector<u8> = b"/ip4/127.0.0.1/udp/80";
 
+// Each of the presets contains the following fields:
+// - Sui address
+// - Protocol pubkey
+// - Proof of possession
+// - Network pubkey
+// - Worker pubkey
+// - Network address
+// - P2P address
+// - Consensus address
+// - Worker address
+const VALIDATOR_PRESET_1: vector<vector<u8>> = vector[
+    x"af76afe6f866d8426d2be85d6ef0b11f871a251d043b2f11e15563bf418f5a5a",
+    VALID_PUBKEY,
+    PROOF_OF_POSSESSION,
+    VALID_NET_PUBKEY,
+    VALID_WORKER_PUBKEY,
+    VALID_NET_ADDR,
+    VALID_P2P_ADDR,
+    VALID_CONSENSUS_ADDR,
+    VALID_WORKER_ADDR,
+];
+
 /// Builder for a Validator. Contains all the fields that can be set for a
 /// validator with default stabs.
 public struct ValidatorBuilder has drop {
@@ -285,11 +307,19 @@ public fun commission_rate(mut builder: ValidatorBuilder, commission_rate: u64):
     builder
 }
 
+/// Set the genesis stake for the validator.
 public fun initial_stake(mut builder: ValidatorBuilder, initial_stake: u64): ValidatorBuilder {
     builder.initial_stake = option::some(initial_stake);
     builder
 }
 
+/// Try to set the genesis stake if it is not already set.
+/// Used by the `TestRunner` to set the initial stake for a validator in genesis.
+public fun try_initial_stake(mut builder: ValidatorBuilder, initial_stake: u64): ValidatorBuilder {
+    if (builder.initial_stake.is_none()) builder.initial_stake.fill(initial_stake);
+    builder
+}
+
 public fun is_active_at_genesis(
     mut builder: ValidatorBuilder,
     is_active_at_genesis: bool,
@@ -300,6 +330,8 @@ public fun is_active_at_genesis(
 
 // === Constants Access ===
 
+public fun valid_protocol_pubkey(): vector<u8> { VALID_PUBKEY }
+
 public fun valid_net_pubkey(): vector<u8> { VALID_NET_PUBKEY }
 
 public fun valid_worker_pubkey(): vector<u8> { VALID_WORKER_PUBKEY }