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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 dart:ffi dynamic library loading.
//
// SharedObjects=ffi_test_dynamic_library ffi_test_functions
// @dart = 2.9
import 'dart:io';
import 'dart:ffi';
import 'package:expect/expect.dart';
import 'dylib_utils.dart';
void main() {
testOpen();
testOpenError();
testLookup();
testLookupError();
testToString();
testEquality();
testHandle();
}
void testOpen() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
}
void testOpenError() {
Expect.throws(
() => dlopenPlatformSpecific("doesnotexistforsurelibrary123409876"));
}
typedef NativeDoubleUnOp = Double Function(Double);
typedef DoubleUnOp = double Function(double);
void testLookup() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
var timesFour = l.lookupFunction<NativeDoubleUnOp, DoubleUnOp>("timesFour");
Expect.approxEquals(12.0, timesFour(3));
if (Platform.isMacOS ||
Platform.isIOS ||
Platform.isAndroid ||
Platform.isLinux) {
// Lookup a symbol from 'libc' since it's loaded with global visibility.
DynamicLibrary p = DynamicLibrary.process();
Expect.isTrue(p.lookup<Void>("strcmp") != nullptr);
} else {
Expect.throws<UnsupportedError>(() => DynamicLibrary.process());
}
DynamicLibrary e = DynamicLibrary.executable();
Expect.isTrue(e.lookup("Dart_Invoke") != nullptr);
}
void testLookupError() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
Expect.throws(() => l.lookupFunction<NativeDoubleUnOp, DoubleUnOp>(
"functionnamethatdoesnotexistforsure749237593845"));
}
void testToString() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
Expect.stringEquals(
"DynamicLibrary: handle=0x", l.toString().substring(0, 25));
}
void testEquality() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
DynamicLibrary l2 = dlopenPlatformSpecific("ffi_test_dynamic_library");
Expect.equals(l, l2);
Expect.equals(l.hashCode, l2.hashCode);
DynamicLibrary l3 = dlopenPlatformSpecific("ffi_test_functions");
Expect.notEquals(l, l3);
}
void testHandle() {
DynamicLibrary l = dlopenPlatformSpecific("ffi_test_dynamic_library");
DynamicLibrary l2 = dlopenPlatformSpecific("ffi_test_dynamic_library");
Pointer<Void> h = l.handle;
Pointer<Void> h2 = l2.handle;
Expect.equals(h, h2);
DynamicLibrary l3 = dlopenPlatformSpecific("ffi_test_functions");
Pointer<Void> h3 = l3.handle;
Expect.notEquals(h, h3);
}