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// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
//
// Dart test program for testing error handling with dart:ffi functions.
//
// SharedObjects=ffi_test_functions
// @dart = 2.9
import 'dart:ffi' as ffi;
import 'dylib_utils.dart';
import "package:expect/expect.dart";
main() {
testWrongArity();
testWrongTypes();
testDynamicAsFunction();
testDynamicLookupFunction();
}
ffi.DynamicLibrary ffiTestFunctions =
dlopenPlatformSpecific("ffi_test_functions");
typedef NativeBinaryOp = ffi.Int32 Function(ffi.Int32, ffi.Int32);
typedef BinaryOp = int Function(int, int);
typedef NativeUnaryOp = ffi.Int64 Function(ffi.Pointer<ffi.Int64>);
typedef UnaryOp = int Function(ffi.Pointer<ffi.Int64>);
void testWrongArity() {
{
dynamic sumPlus42 =
ffiTestFunctions.lookupFunction<NativeBinaryOp, BinaryOp>("SumPlus42");
Expect.throwsNoSuchMethodError(() => sumPlus42(10));
Expect.throwsNoSuchMethodError(() => sumPlus42(10, 11, 12));
Expect.throwsNoSuchMethodError(() => sumPlus42(10, 11, 12, y: 13));
}
{
Function sumPlus42 =
ffiTestFunctions.lookupFunction<NativeBinaryOp, BinaryOp>("SumPlus42");
Expect.throwsNoSuchMethodError(() => sumPlus42(10));
Expect.throwsNoSuchMethodError(() => sumPlus42(10, 11, 12));
Expect.throwsNoSuchMethodError(() => sumPlus42(10, 11, 12, y: 13));
}
}
void testWrongTypes() {
{
dynamic sumPlus42 =
ffiTestFunctions.lookupFunction<NativeBinaryOp, BinaryOp>("SumPlus42");
Expect.throwsTypeError(() => sumPlus42("abc", "def"));
}
{
Function sumPlus42 =
ffiTestFunctions.lookupFunction<NativeBinaryOp, BinaryOp>("SumPlus42");
Expect.throwsTypeError(() => sumPlus42("abc", "def"));
}
{
dynamic pointerOp = ffiTestFunctions
.lookupFunction<NativeUnaryOp, UnaryOp>("Assign1337Index1");
Expect.throwsTypeError(() => pointerOp(0));
}
}
// Test that invoking 'Pointer.asFunction' with a dynamic receiver type throws
// an exception.
void testDynamicAsFunction() {
dynamic x = ffi.nullptr.cast<ffi.NativeFunction<ffi.Void Function()>>();
Expect.throwsNoSuchMethodError(() {
x.asFunction<void Function()>();
});
}
// Test that invoking 'DynamicLibrary.lookupFunction' with a dynamic receiver
// type throws an exception.
void testDynamicLookupFunction() {
dynamic lib = ffiTestFunctions;
Expect.throwsNoSuchMethodError(() {
lib.lookupFunction<ffi.Void Function(), void Function()>("_");
});
}