Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
51 lines
1.3 KiB
Dart
51 lines
1.3 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Dart test program for the "is" type test operator.
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import "package:expect/expect.dart";
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testTryCatch(x) {
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try {
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throw x;
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Expect.fail("Exception '$x' should've been thrown");
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} on Object catch (obj) {
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Expect.equals(obj, x);
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}
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}
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main() {
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var evalCount = 0;
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testEval(x) {
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evalCount++;
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return x;
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}
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// Test that types that match JS primitive types compare correctly to Object
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var x = 1;
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Expect.isTrue(x is Object);
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var x2 = 'hi';
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Expect.isTrue(x2 is Object);
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var x3 = true;
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Expect.isTrue(x3 is Object);
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var x4 = null;
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Expect.isTrue(x4 is Object);
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var y;
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Expect.isTrue(y is Object);
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// Verify that operand is evaluated
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Expect.isTrue(testEval(123) is Object);
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Expect.equals(1, evalCount);
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Expect.isTrue(testEval('world') is Object);
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Expect.equals(2, evalCount);
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Expect.isTrue(testEval(false) is Object);
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Expect.equals(3, evalCount);
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Expect.isTrue(testEval(null) is Object);
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Expect.equals(4, evalCount);
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// Verify that these objects are catchable
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testTryCatch(444);
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testTryCatch('abc');
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testTryCatch(true);
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}
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