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Issue 11358203: Library syntax updates. Covers all remaining files in ~/tests aprt from ~/tests/language and ~/test… (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 8 years, 1 month ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 // Test that the default PRNG does converge towards Pi when doing a Monte Carlo 5 // Test that the default PRNG does converge towards Pi when doing a Monte Carlo
6 // simulation. 6 // simulation.
7 7
8 // Library tag to allow Dartium to run the test. 8 // Library tag to allow Dartium to run the test.
9 #library("pi_test.dart"); 9 library pi_test;
10 10
11 #import("dart:math"); 11 import 'dart:math';
12 12
13 void main() { 13 void main() {
14 var seed = new Random().nextInt((1<<32) - 1); 14 var seed = new Random().nextInt((1<<32) - 1);
15 print("pi_test seed: $seed"); 15 print("pi_test seed: $seed");
16 var prng = new Random(seed); 16 var prng = new Random(seed);
17 var outside = 0; 17 var outside = 0;
18 var inside = 0; 18 var inside = 0;
19 for (var i = 0; i < 600000; i++) { 19 for (var i = 0; i < 600000; i++) {
20 var x = prng.nextDouble(); 20 var x = prng.nextDouble();
21 var y = prng.nextDouble(); 21 var y = prng.nextDouble();
22 if ((x*x) + (y*y) < 1.0) { 22 if ((x*x) + (y*y) < 1.0) {
23 inside++; 23 inside++;
24 } else { 24 } else {
25 outside++; 25 outside++;
26 } 26 }
27 } 27 }
28 // Mmmmh, Pie! 28 // Mmmmh, Pie!
29 var pie = 4.0 * (inside/(inside + outside)); 29 var pie = 4.0 * (inside/(inside + outside));
30 print("$pie"); 30 print("$pie");
31 Expect.isTrue(((PI - 0.009) < pie) && (pie < (PI + 0.009))); 31 Expect.isTrue(((PI - 0.009) < pie) && (pie < (PI + 0.009)));
32 } 32 }
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