Add BPF Sanity program-test based test (#19159)

programs/bpf/rust/sanity/tests/lib.rs

@@ -0,0 +1,35 @@
+#![cfg(feature = "test-bpf")]
+
+use solana_bpf_rust_sanity::process_instruction;
+use solana_program_test::*;
+use solana_sdk::{
+    instruction::{AccountMeta, Instruction},
+    pubkey::Pubkey,
+    signature::{Keypair, Signer},
+    transaction::Transaction,
+};
+
+#[tokio::test]
+async fn test_sysvars() {
+    let program_id = Pubkey::new_unique();
+    let program_test = ProgramTest::new(
+        "solana_bpf_rust_sanity",
+        program_id,
+        processor!(process_instruction),
+    );
+    let (mut banks_client, payer_keypair, recent_blockhash) = program_test.start().await;
+
+    let mut transaction = Transaction::new_with_payer(
+        &[Instruction::new_with_bincode(
+            program_id,
+            &(),
+            vec![
+                AccountMeta::new(payer_keypair.pubkey(), true),
+                AccountMeta::new(Keypair::new().pubkey(), false),
+            ],
+        )],
+        Some(&payer_keypair.pubkey()),
+    );
+    transaction.sign(&[&payer_keypair], recent_blockhash);
+    banks_client.process_transaction(transaction).await.unwrap();
+}