contracts: Remove wat support from test fixtures (#3588)

In order to prepare for PolkaVM support I removed the wat support from
our test fixture crate.

- Removed redundant tests (invalid module checks are already inside the
prepare module where they belong
- Converted the gas_sync tests to Rust
- Moved the start function test to the `wasm` module

substrate/frame/contracts/src/tests.rs

@@ -852,27 +852,6 @@ fn deposit_event_max_value_limit() {
 	});
 }
 
-// Fail out of fuel (ref_time weight) inside the start function.
-#[test]
-fn run_out_of_fuel_start_fun() {
-	let (wasm, _code_hash) = compile_module::<Test>("run_out_of_gas_start_fn").unwrap();
-	ExtBuilder::default().existential_deposit(50).build().execute_with(|| {
-		let _ = <Test as Config>::Currency::set_balance(&ALICE, 1_000_000);
-		assert_err_ignore_postinfo!(
-			Contracts::instantiate_with_code(
-				RuntimeOrigin::signed(ALICE),
-				0,
-				Weight::from_parts(1_000_000_000_000, u64::MAX),
-				None,
-				wasm,
-				vec![],
-				vec![],
-			),
-			Error::<Test>::OutOfGas,
-		);
-	});
-}
-
 // Fail out of fuel (ref_time weight) in the engine.
 #[test]
 fn run_out_of_fuel_engine() {
@@ -956,50 +935,15 @@ fn run_out_of_fuel_host() {
 
 #[test]
 fn gas_syncs_work() {
-	let (wasm0, _code_hash) = compile_module::<Test>("seal_input_noop").unwrap();
-	let (wasm1, _code_hash) = compile_module::<Test>("seal_input_once").unwrap();
-	let (wasm2, _code_hash) = compile_module::<Test>("seal_input_twice").unwrap();
+	let (code, _code_hash) = compile_module::<Test>("caller_is_origin_n").unwrap();
 	ExtBuilder::default().existential_deposit(200).build().execute_with(|| {
 		let _ = <Test as Config>::Currency::set_balance(&ALICE, 1_000_000);
-		// Instantiate noop contract.
-		let addr0 = Contracts::bare_instantiate(
+		let addr = Contracts::bare_instantiate(
 			ALICE,
 			0,
 			GAS_LIMIT,
 			None,
-			Code::Upload(wasm0),
-			vec![],
-			vec![],
-			DebugInfo::Skip,
-			CollectEvents::Skip,
-		)
-		.result
-		.unwrap()
-		.account_id;
-
-		// Instantiate 1st contract.
-		let addr1 = Contracts::bare_instantiate(
-			ALICE,
-			0,
-			GAS_LIMIT,
-			None,
-			Code::Upload(wasm1),
-			vec![],
-			vec![],
-			DebugInfo::Skip,
-			CollectEvents::Skip,
-		)
-		.result
-		.unwrap()
-		.account_id;
-
-		// Instantiate 2nd contract.
-		let addr2 = Contracts::bare_instantiate(
-			ALICE,
-			0,
-			GAS_LIMIT,
-			None,
-			Code::Upload(wasm2),
+			Code::Upload(code),
 			vec![],
 			vec![],
 			DebugInfo::Skip,
@@ -1011,11 +955,11 @@ fn gas_syncs_work() {
 
 		let result = Contracts::bare_call(
 			ALICE,
-			addr0,
+			addr.clone(),
 			0,
 			GAS_LIMIT,
 			None,
-			1u8.to_le_bytes().to_vec(),
+			0u32.encode(),
 			DebugInfo::Skip,
 			CollectEvents::Skip,
 			Determinism::Enforced,
@@ -1025,27 +969,28 @@ fn gas_syncs_work() {
 
 		let result = Contracts::bare_call(
 			ALICE,
-			addr1,
+			addr.clone(),
 			0,
 			GAS_LIMIT,
 			None,
-			1u8.to_le_bytes().to_vec(),
+			1u32.encode(),
 			DebugInfo::Skip,
 			CollectEvents::Skip,
 			Determinism::Enforced,
 		);
 		assert_ok!(result.result);
 		let gas_consumed_once = result.gas_consumed.ref_time();
-		let host_consumed_once = <Test as Config>::Schedule::get().host_fn_weights.input.ref_time();
+		let host_consumed_once =
+			<Test as Config>::Schedule::get().host_fn_weights.caller_is_origin.ref_time();
 		let engine_consumed_once = gas_consumed_once - host_consumed_once - engine_consumed_noop;
 
 		let result = Contracts::bare_call(
 			ALICE,
-			addr2,
+			addr,
 			0,
 			GAS_LIMIT,
 			None,
-			1u8.to_le_bytes().to_vec(),
+			2u32.encode(),
 			DebugInfo::Skip,
 			CollectEvents::Skip,
 			Determinism::Enforced,
@@ -4453,96 +4398,6 @@ fn contract_reverted() {
 	});
 }
 
-#[test]
-fn code_rejected_error_works() {
-	ExtBuilder::default().existential_deposit(200).build().execute_with(|| {
-		let _ = <Test as Config>::Currency::set_balance(&ALICE, 1_000_000);
-
-		let (wasm, _) = compile_module::<Test>("invalid_module").unwrap();
-		assert_noop!(
-			Contracts::upload_code(
-				RuntimeOrigin::signed(ALICE),
-				wasm.clone(),
-				None,
-				Determinism::Enforced
-			),
-			<Error<Test>>::CodeRejected,
-		);
-		let result = Contracts::bare_instantiate(
-			ALICE,
-			0,
-			GAS_LIMIT,
-			None,
-			Code::Upload(wasm),
-			vec![],
-			vec![],
-			DebugInfo::UnsafeDebug,
-			CollectEvents::Skip,
-		);
-		assert_err!(result.result, <Error<Test>>::CodeRejected);
-		assert_eq!(
-			std::str::from_utf8(&result.debug_message).unwrap(),
-			"Can't load the module into wasmi!"
-		);
-
-		let (wasm, _) = compile_module::<Test>("invalid_contract_no_call").unwrap();
-		assert_noop!(
-			Contracts::upload_code(
-				RuntimeOrigin::signed(ALICE),
-				wasm.clone(),
-				None,
-				Determinism::Enforced
-			),
-			<Error<Test>>::CodeRejected,
-		);
-
-		let result = Contracts::bare_instantiate(
-			ALICE,
-			0,
-			GAS_LIMIT,
-			None,
-			Code::Upload(wasm),
-			vec![],
-			vec![],
-			DebugInfo::UnsafeDebug,
-			CollectEvents::Skip,
-		);
-		assert_err!(result.result, <Error<Test>>::CodeRejected);
-		assert_eq!(
-			std::str::from_utf8(&result.debug_message).unwrap(),
-			"call function isn't exported"
-		);
-
-		let (wasm, _) = compile_module::<Test>("invalid_contract_no_memory").unwrap();
-		assert_noop!(
-			Contracts::upload_code(
-				RuntimeOrigin::signed(ALICE),
-				wasm.clone(),
-				None,
-				Determinism::Enforced
-			),
-			<Error<Test>>::CodeRejected,
-		);
-
-		let result = Contracts::bare_instantiate(
-			ALICE,
-			0,
-			GAS_LIMIT,
-			None,
-			Code::Upload(wasm),
-			vec![],
-			vec![],
-			DebugInfo::UnsafeDebug,
-			CollectEvents::Skip,
-		);
-		assert_err!(result.result, <Error<Test>>::CodeRejected);
-		assert_eq!(
-			std::str::from_utf8(&result.debug_message).unwrap(),
-			"No memory import found in the module"
-		);
-	});
-}
-
 #[test]
 fn set_code_hash() {
 	let (wasm, code_hash) = compile_module::<Test>("set_code_hash").unwrap();