blob: df011194bdbdf374830725e42125bbfb94c8a245 [file] [log] [blame]
// Copyright (c) 2016, 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 = 2.9
import "dart:async";
import "package:async_helper/async_helper.dart";
import "package:expect/expect.dart";
// TODO(rnystrom): Unify with assert_with_message_test.dart.
main() {
// Only run with asserts enabled mode.
bool assertsEnabled = false;
assert(assertsEnabled = true);
if (!assertsEnabled) return;
// Basics.
assert(true, "");
int x = null;
// Successful asserts won't execute message.
assert(true, x + 42);
assert(true, throw "unreachable");
// Can use any value as message.
try {
assert(false, 42);
} on AssertionError catch (e) {
Expect.equals(42, e.message);
}
try {
assert(false, "");
} on AssertionError catch (e) {
Expect.equals("", e.message);
}
try {
assert(false, null);
} on AssertionError catch (e) {
Expect.equals(null, e.message);
}
// Test expression can throw.
try {
assert(throw "test", throw "message");
} on String catch (e) {
Expect.equals("test", e);
}
// Message expression can throw.
try {
assert(false, throw "message");
} on String catch (e) {
Expect.equals("message", e);
}
// Failing asserts evaluate message after test.
var list = [];
try {
assert((list..add(1)).isEmpty, (list..add(3)).length);
} on AssertionError catch (e) {
Expect.equals(2, e.message);
Expect.listEquals([1, 3], list);
}
asyncStart();
asyncTests().then((_) {
asyncEnd();
});
}
Future asyncTests() async {
// You can await in both condition and message.
assert(true, await 0);
assert(await true, 1);
assert(await true, await 2);
// Successful asserts won't await/evaluate message.
Future unreachable() => throw "unreachable";
assert(await true, await unreachable());
try {
assert(false, await 3);
} on AssertionError catch (e) {
Expect.equals(3, e.message);
}
var falseFuture = new Future.value(false);
var numFuture = new Future.value(4);
try {
assert(await falseFuture, await numFuture);
} on AssertionError catch (e) {
Expect.equals(4, e.message);
}
try {
assert(await falseFuture, await new Future.error("error"));
} on String catch (e) {
Expect.equals("error", e);
}
}