add rust litesvm test for checking account

basics/checking-accounts/native/program/Cargo.toml

@@ -11,10 +11,17 @@ 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 = "0.8.1"
+solana-keypair = "3.0.1"
+solana-native-token = "3.0.0"
+solana-pubkey = "3.0.0"
+solana-sdk = "3.0.0"
+solana-transaction = "3.0.1"

basics/checking-accounts/native/program/tests/test.rs

@@ -0,0 +1,62 @@
+use litesvm::LiteSVM;
+use solana_keypair::{Keypair, Signer};
+use solana_native_token::LAMPORTS_PER_SOL;
+use solana_pubkey::Pubkey;
+use solana_system_interface::instruction::create_account;
+use solana_transaction::{AccountMeta, Instruction, Transaction};
+
+#[test]
+fn test_checking_accounts() {
+    let mut svm = LiteSVM::new();
+
+    let payer = Keypair::new();
+    let account_to_change = Keypair::new();
+    let account_to_create = Keypair::new();
+
+    svm.airdrop(&payer.pubkey(), LAMPORTS_PER_SOL * 10).unwrap();
+
+    let program_id = Pubkey::new_unique();
+    let program_bytes =
+        include_bytes!("../../../../../target/deploy/checking_accounts_native_program.so");
+
+    svm.add_program(program_id, program_bytes).unwrap();
+
+    let create_account_ix = create_account(
+        &payer.pubkey(),
+        &account_to_change.pubkey(),
+        LAMPORTS_PER_SOL,
+        0,
+        &program_id,
+    );
+
+    let tx = Transaction::new_signed_with_payer(
+        &[create_account_ix],
+        Some(&payer.pubkey()),
+        &[&payer, &account_to_change],
+        svm.latest_blockhash(),
+    );
+
+    // verify tx was sent successfully
+    let _ = svm.send_transaction(tx).is_ok();
+
+    let ix = Instruction {
+        program_id,
+        accounts: vec![
+            AccountMeta::new(payer.pubkey(), true),
+            AccountMeta::new(account_to_create.pubkey(), true),
+            AccountMeta::new(account_to_change.pubkey(), true),
+            AccountMeta::new(solana_system_interface::program::ID, false),
+        ],
+        data: vec![0],
+    };
+
+    let tx = Transaction::new_signed_with_payer(
+        &[ix],
+        Some(&payer.pubkey()),
+        &[payer, account_to_change, account_to_create],
+        svm.latest_blockhash(),
+    );
+
+    // verify tx was sent successfully
+    let _ = svm.send_transaction(tx).is_ok();
+}