From d4b15ce81866d3ee1bf362d5136fc127cf00f87a Mon Sep 17 00:00:00 2001
From: Alfonso Acosta <alfonso@stellar.org>
Date: Tue, 5 Sep 2023 02:53:20 +0200
Subject: [PATCH] Add test to check EXPIRATION_ENTRY_SIZE

---
 soroban-env-host/tests/fees.rs | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/soroban-env-host/tests/fees.rs b/soroban-env-host/tests/fees.rs
index 9bef7d335..08e4f0557 100644
--- a/soroban-env-host/tests/fees.rs
+++ b/soroban-env-host/tests/fees.rs
@@ -1,8 +1,20 @@
-use soroban_env_host::fees::{
-    compute_rent_fee, compute_transaction_resource_fee, compute_write_fee_per_1kb,
-    FeeConfiguration, LedgerEntryRentChange, RentFeeConfiguration, TransactionResources,
-    WriteFeeConfiguration,
-};
+use soroban_env_common::xdr::{Hash, LedgerEntry, LedgerEntryData, LedgerEntryExt, WriteXdr};
+use soroban_env_host::fees::{compute_rent_fee, compute_transaction_resource_fee, compute_write_fee_per_1kb, EXPIRATION_ENTRY_SIZE, FeeConfiguration, LedgerEntryRentChange, RentFeeConfiguration, TransactionResources, WriteFeeConfiguration};
+use soroban_env_host::xdr::ExpirationEntry;
+
+#[test]
+fn expiration_entry_size() {
+    let expiration_entry = LedgerEntry{
+        last_modified_ledger_seq: 0,
+        data: LedgerEntryData::Expiration(ExpirationEntry{
+            key_hash: Hash([0; 32]),
+            expiration_ledger_seq: 0,
+        }),
+        ext: LedgerEntryExt::V0,
+    };
+    assert_eq!(EXPIRATION_ENTRY_SIZE,
+               expiration_entry.to_xdr().unwrap().len() as u32);
+}
 
 #[test]
 fn resource_fee_computation() {