Make stake integration tests aware of stake minimum delegation

runtime/tests/stake.rs

@@ -116,14 +116,20 @@ fn test_stake_create_and_split_single_signature() {
 
     let staker_pubkey = staker_keypair.pubkey();
 
-    let bank_client = BankClient::new_shared(&Arc::new(Bank::new_for_tests(&genesis_config)));
+    let bank = Arc::new(Bank::new_for_tests(&genesis_config));
+    let bank_client = BankClient::new_shared(&bank);
 
     let stake_address =
         Pubkey::create_with_seed(&staker_pubkey, "stake", &stake::program::id()).unwrap();
 
     let authorized = Authorized::auto(&staker_pubkey);
 
-    let lamports = 1_000_000;
+    let lamports = {
+        let rent = &bank.rent_collector().rent;
+        let rent_exempt_reserve = rent.minimum_balance(StakeState::size_of());
+        let minimum_delegation = solana_stake_program::get_minimum_delegation(&bank.feature_set);
+        2 * (rent_exempt_reserve + minimum_delegation)
+    };
 
     // Create stake account with seed
     let message = Message::new(
@@ -186,14 +192,20 @@ fn test_stake_create_and_split_to_existing_system_account() {
 
     let staker_pubkey = staker_keypair.pubkey();
 
-    let bank_client = BankClient::new_shared(&Arc::new(Bank::new_for_tests(&genesis_config)));
+    let bank = Arc::new(Bank::new_for_tests(&genesis_config));
+    let bank_client = BankClient::new_shared(&bank);
 
     let stake_address =
         Pubkey::create_with_seed(&staker_pubkey, "stake", &stake::program::id()).unwrap();
 
     let authorized = Authorized::auto(&staker_pubkey);
 
-    let lamports = 1_000_000;
+    let lamports = {
+        let rent = &bank.rent_collector().rent;
+        let rent_exempt_reserve = rent.minimum_balance(StakeState::size_of());
+        let minimum_delegation = solana_stake_program::get_minimum_delegation(&bank.feature_set);
+        2 * (rent_exempt_reserve + minimum_delegation)
+    };
 
     // Create stake account with seed
     let message = Message::new(
@@ -263,7 +275,7 @@ fn test_stake_account_lifetime() {
     } = create_genesis_config_with_leader(
         100_000_000_000,
         &solana_sdk::pubkey::new_rand(),
-        1_000_000,
+        2_000_000_000,
     );
     let bank = Bank::new_for_tests(&genesis_config);
     let mint_pubkey = mint_keypair.pubkey();
@@ -290,6 +302,14 @@ fn test_stake_account_lifetime() {
         .expect("failed to create vote account");
 
     let authorized = Authorized::auto(&stake_pubkey);
+    let minimum_delegation = {
+        let rent = &bank.rent_collector().rent;
+        let rent_exempt_reserve = rent.minimum_balance(StakeState::size_of());
+        assert_eq!(rent_exempt_reserve, 0, "this test assumes rent is free");
+        solana_stake_program::get_minimum_delegation(&bank.feature_set)
+    };
+    let starting_balance = 2 * minimum_delegation;
+
     // Create stake account and delegate to vote account
     let message = Message::new(
         &stake_instruction::create_account_and_delegate_stake(
@@ -298,7 +318,7 @@ fn test_stake_account_lifetime() {
             &vote_pubkey,
             &authorized,
             &Lockup::default(),
-            1_000_000,
+            starting_balance,
         ),
         Some(&mint_pubkey),
     );
@@ -310,7 +330,7 @@ fn test_stake_account_lifetime() {
     let account = bank.get_account(&stake_pubkey).expect("account not found");
     let stake_state = account.state().expect("couldn't unpack account data");
     if let StakeState::Stake(_meta, stake) = stake_state {
-        assert_eq!(stake.delegation.stake, 1_000_000);
+        assert_eq!(stake.delegation.stake, starting_balance);
     } else {
         panic!("wrong account type found")
     }
@@ -334,7 +354,7 @@ fn test_stake_account_lifetime() {
     let account = bank.get_account(&stake_pubkey).expect("account not found");
     let stake_state = account.state().expect("couldn't unpack account data");
     if let StakeState::Stake(_meta, stake) = stake_state {
-        assert_eq!(stake.delegation.stake, 1_000_000);
+        assert_eq!(stake.delegation.stake, starting_balance);
     } else {
         panic!("wrong account type found")
     }
@@ -372,7 +392,7 @@ fn test_stake_account_lifetime() {
     let staked = get_staked(&bank, &stake_pubkey);
     let lamports = bank.get_balance(&stake_pubkey);
     assert!(staked > pre_staked);
-    assert!(lamports > 1_000_000);
+    assert!(lamports > starting_balance);
 
     // split the stake
     let split_stake_keypair = Keypair::new();
@@ -537,6 +557,13 @@ fn test_create_stake_account_from_seed() {
         .expect("failed to create vote account");
 
     let authorized = Authorized::auto(&mint_pubkey);
+    let (balance, delegation) = {
+        let rent = &bank.rent_collector().rent;
+        let rent_exempt_reserve = rent.minimum_balance(StakeState::size_of());
+        let minimum_delegation = solana_stake_program::get_minimum_delegation(&bank.feature_set);
+        (rent_exempt_reserve + minimum_delegation, minimum_delegation)
+    };
+
     // Create stake account and delegate to vote account
     let message = Message::new(
         &stake_instruction::create_account_with_seed_and_delegate_stake(
@@ -547,7 +574,7 @@ fn test_create_stake_account_from_seed() {
             &vote_pubkey,
             &authorized,
             &Lockup::default(),
-            1_000_000,
+            balance,
         ),
         Some(&mint_pubkey),
     );
@@ -559,7 +586,7 @@ fn test_create_stake_account_from_seed() {
     let account = bank.get_account(&stake_pubkey).expect("account not found");
     let stake_state = account.state().expect("couldn't unpack account data");
     if let StakeState::Stake(_meta, stake) = stake_state {
-        assert_eq!(stake.delegation.stake, 1_000_000);
+        assert_eq!(stake.delegation.stake, delegation);
     } else {
         panic!("wrong account type found")
     }