program-test: Add large bootstrap stake for realistic warmups (backport

#16739) (#16741)

* program-test: Add large bootstrap stake for realistic warmups (#16739)

(cherry picked from commit f421463)

# Conflicts:
#	program-test/Cargo.toml

* Fix merge conflict

Co-authored-by: Jon Cinque <jon.cinque@gmail.com>

program-test/Cargo.toml

@@ -28,4 +28,5 @@ thiserror = "1.0"
 tokio = { version = "1", features = ["full"] }
 
 [dev-dependencies]
+assert_matches = "1.3.0"
 solana-stake-program = { path = "../programs/stake", version = "=1.6.7" }

program-test/src/lib.rs

@@ -662,7 +662,8 @@ impl ProgramTest {
         let rent = Rent::default();
         let fee_rate_governor = FeeRateGovernor::default();
         let bootstrap_validator_pubkey = Pubkey::new_unique();
-        let bootstrap_validator_stake_lamports = rent.minimum_balance(VoteState::size_of());
+        let bootstrap_validator_stake_lamports =
+            rent.minimum_balance(VoteState::size_of()) + sol_to_lamports(1_000_000.0);
 
         let mint_keypair = Keypair::new();
         let voting_keypair = Keypair::new();

program-test/tests/warp.rs

@@ -1,5 +1,7 @@
 #![allow(clippy::integer_arithmetic)]
 use {
+    assert_matches::assert_matches,
+    bincode::deserialize,
     solana_program_test::{processor, ProgramTest, ProgramTestError},
     solana_sdk::{
         account_info::{next_account_info, AccountInfo},
@@ -11,12 +13,16 @@ use {
         rent::Rent,
         signature::{Keypair, Signer},
         system_instruction, system_program,
-        sysvar::{clock, Sysvar},
+        sysvar::{
+            clock,
+            stake_history::{self, StakeHistory},
+            Sysvar,
+        },
         transaction::{Transaction, TransactionError},
     },
     solana_stake_program::{
         stake_instruction,
-        stake_state::{Authorized, Lockup},
+        stake_state::{Authorized, Lockup, StakeState},
     },
     solana_vote_program::{
         vote_instruction,
@@ -248,4 +254,30 @@ async fn stake_rewards_from_warp() {
         .expect("account exists")
         .unwrap();
     assert!(account.lamports > stake_lamports);
+
+    // check that stake is fully active
+    let stake_history_account = context
+        .banks_client
+        .get_account(stake_history::id())
+        .await
+        .expect("account exists")
+        .unwrap();
+
+    let clock_account = context
+        .banks_client
+        .get_account(clock::id())
+        .await
+        .expect("account exists")
+        .unwrap();
+
+    let stake_state: StakeState = deserialize(&account.data).unwrap();
+    let stake_history: StakeHistory = deserialize(&stake_history_account.data).unwrap();
+    let clock: Clock = deserialize(&clock_account.data).unwrap();
+    let stake = stake_state.stake().unwrap();
+    assert_matches!(
+        stake
+            .delegation
+            .stake_activating_and_deactivating(clock.epoch, Some(&stake_history), true,),
+        (_, 0, 0)
+    );
 }