dart-sdk/tests/corelib_2/null_test.dart
Ben Konyi 8b36c83a10 Migrated test block 17 to Dart 2.0.
Fairly minor changes to print_test, and num_clamp_test was split into
two tests to isolate compile time errors.

BUG=
R=rnystrom@google.com

Review-Url: https://codereview.chromium.org/2987203002 .
2017-07-31 15:04:00 -07:00

33 lines
875 B
Dart

// Copyright (c) 2012, 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.
import "package:expect/expect.dart";
// Test that Null inherits properties from Object.
main() {
var x;
Expect.isTrue(x is Object);
Expect.isTrue(x is dynamic);
Expect.isTrue(x is! String);
Expect.isTrue(x is! int);
// These shouldn't throw.
x.runtimeType;
x.toString();
x.hashCode;
// operator== is inherited from Object. It's the same as identical.
// It's not really testable.
Expect.isTrue(identical(x, null));
Expect.isTrue(x == null);
// Methods can be closurized and yields the same result.
var ts = x.toString;
Expect.equals(null.toString(), ts());
// noSuchMethod is tested in null_nosuchmethod_test.dart.
}