add rust test for pda rent payer

Cargo.toml

@@ -67,3 +67,11 @@ spl-token-2022-interface = "2.0.0"
 # pinocchio
 pinocchio = "=0.8.1"
 pinocchio-log = "0.4.0"
+
+# testing
+litesvm = "0.8.1"
+solana-instruction = "3.0.0"
+solana-keypair = "3.0.1"
+solana-pubkey = "3.0.0"
+solana-transaction = "3.0.1"
+solana-native-token = "3.0.0"

basics/pda-rent-payer/native/program/Cargo.toml

@@ -13,9 +13,16 @@ solana-system-interface.workspace = true
 crate-type = ["cdylib", "lib"]
 
 [features]
-anchor-debug = []
 custom-heap = []
 custom-panic = []
 
 [lints.rust]
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(target_os, values("solana"))'] }
+
+[dev-dependencies]
+litesvm.workspace = true
+solana-instruction.workspace = true
+solana-keypair.workspace = true
+solana-pubkey.workspace = true
+solana-transaction.workspace = true
+solana-native-token.workspace = true

basics/pda-rent-payer/native/program/src/instructions/init_rent_vault.rs

@@ -12,7 +12,7 @@ use crate::state::RentVault;
 
 #[derive(BorshDeserialize, BorshSerialize)]
 pub struct InitRentVaultArgs {
-    fund_lamports: u64,
+    pub fund_lamports: u64,
 }
 
 pub fn init_rent_vault(

basics/pda-rent-payer/native/program/tests/test.rs

@@ -0,0 +1,70 @@
+use litesvm::LiteSVM;
+use pda_rent_payer_program::instructions::InitRentVaultArgs;
+use pda_rent_payer_program::processor::MyInstruction;
+use solana_instruction::{AccountMeta, Instruction};
+use solana_keypair::{Keypair, Signer};
+use solana_native_token::LAMPORTS_PER_SOL;
+use solana_pubkey::Pubkey;
+use solana_transaction::Transaction;
+
+#[test]
+fn test_pda_rent_payer() {
+    let program_id = Pubkey::new_unique();
+    let program_bytes = include_bytes!("../../../../../target/deploy/pda_rent_payer_program.so");
+
+    let mut svm = LiteSVM::new();
+    svm.add_program(program_id, program_bytes).unwrap();
+
+    let payer = Keypair::new();
+    svm.airdrop(&payer.pubkey(), LAMPORTS_PER_SOL * 10).unwrap();
+
+    let rent_value_pda = Pubkey::find_program_address(&[b"rent_vault"], &program_id).0;
+
+    let args = InitRentVaultArgs {
+        fund_lamports: 1000000000,
+    };
+
+    let data = borsh::to_vec(&MyInstruction::InitRentVault(args)).unwrap();
+
+    let ix = Instruction {
+        program_id,
+        accounts: vec![
+            AccountMeta::new(rent_value_pda, false),
+            AccountMeta::new(payer.pubkey(), true),
+            AccountMeta::new(solana_system_interface::program::ID, false),
+        ],
+        data,
+    };
+
+    let tx = Transaction::new_signed_with_payer(
+        &[ix],
+        Some(&payer.pubkey()),
+        &[&payer],
+        svm.latest_blockhash(),
+    );
+
+    let _ = svm.send_transaction(tx).is_ok();
+
+    let new_account = Keypair::new();
+
+    let data = borsh::to_vec(&MyInstruction::CreateNewAccount).unwrap();
+
+    let ix = Instruction {
+        program_id,
+        accounts: vec![
+            AccountMeta::new(new_account.pubkey(), true),
+            AccountMeta::new(rent_value_pda, false),
+            AccountMeta::new(solana_system_interface::program::ID, false),
+        ],
+        data,
+    };
+
+    let tx = Transaction::new_signed_with_payer(
+        &[ix],
+        Some(&payer.pubkey()),
+        &[&payer, &new_account],
+        svm.latest_blockhash(),
+    );
+
+    let _ = svm.send_transaction(tx).is_ok();
+}