Add basic setup test

frame/evm-balances/src/mock.rs

@@ -37,6 +37,14 @@ use crate::{self as pallet_evm_balances, *};
 
 pub(crate) const INIT_BALANCE: u64 = 10_000_000;
 
+pub(crate) fn alice() -> H160 {
+	H160::from_str("1000000000000000000000000000000000000000").unwrap()
+}
+
+pub(crate) fn bob() -> H160 {
+	H160::from_str("2000000000000000000000000000000000000000").unwrap()
+}
+
 type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;
 type Block = frame_system::mocking::MockBlock<Test>;
 
@@ -193,14 +201,8 @@ pub fn new_test_ext() -> sp_io::TestExternalities {
 					nonce: Default::default(),
 					storage: Default::default(),
 				};
-				map.insert(
-					H160::from_str("1000000000000000000000000000000000000000").unwrap(),
-					init_genesis_account.clone(),
-				);
-				map.insert(
-					H160::from_str("2000000000000000000000000000000000000000").unwrap(),
-					init_genesis_account,
-				);
+				map.insert(alice(), init_genesis_account.clone());
+				map.insert(bob(), init_genesis_account);
 				map
 			},
 		},

frame/evm-balances/src/tests.rs

@@ -1 +1,27 @@
 //! Unit tests.
+
+use crate::{mock::*, *};
+
+#[test]
+fn basic_setup_works() {
+	new_test_ext().execute_with_ext(|_| {
+		// Check the accounts.
+		assert_eq!(
+			<EvmSystem>::full_account(&alice()),
+			pallet_evm_system::AccountInfo {
+				nonce: 0,
+				data: account_data::AccountData { free: INIT_BALANCE }
+			}
+		);
+		assert_eq!(
+			<EvmSystem>::full_account(&bob()),
+			pallet_evm_system::AccountInfo {
+				nonce: 0,
+				data: account_data::AccountData { free: INIT_BALANCE }
+			}
+		);
+
+		// Check the total balance value.
+		assert_eq!(EvmBalances::total_issuance(), 2 * INIT_BALANCE);
+	});
+}