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Side by Side Diff: tests/kernel/unsorted/loop_test.dart

Issue 2451623006: Reland "Merge more Kernel infrastructure from kernel_sdk SDK fork." (Closed)
Patch Set: Fix Created 4 years, 1 month ago
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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
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.
4
5 // Tests of loops.
6
7 import 'expect.dart';
8
9 fact(n) {
10 var f = 1;
11 while (n > 0) {
12 f *= n;
13 --n;
14 }
15 return f;
16 }
17
18 fib(n) {
19 if (n == 0) return 0;
20 var previous = 0, current = 1;
21 while (n > 1) {
22 var temp = current;
23 current += previous;
24 previous = temp;
25 --n;
26 }
27 return current;
28 }
29
30 mkTrue() => true;
31 mkFalse() => false;
32
33 check(b) {
34 Expect.isTrue(b);
35 return b;
36 }
37
38 test0() {
39 while (mkTrue()) {
40 Expect.isTrue(true);
41 return;
42 }
43 Expect.isTrue(false);
44 }
45
46 test1() {
47 while (mkFalse()) {
48 Expect.isTrue(false);
49 }
50 Expect.isTrue(true);
51 }
52
53 test2() {
54 do {
55 Expect.isTrue(true);
56 } while (mkFalse());
57 Expect.isTrue(true);
58 }
59
60 test3() {
61 do {
62 Expect.isTrue(true);
63 return;
64 } while (check(false));
65 Expect.isTrue(false);
66 }
67
68 main() {
69 Expect.isTrue(fact(0) == 1);
70 Expect.isTrue(fact(1) == 1);
71 Expect.isTrue(fact(5) == 120);
72 Expect.isTrue(fact(42) ==
73 1405006117752879898543142606244511569936384000000000);
74 Expect.isTrue(fact(3.14159) == 1.0874982674320444);
75
76 Expect.isTrue(fib(0) == 0);
77 Expect.isTrue(fib(1) == 1);
78 Expect.isTrue(fib(2) == 1);
79 Expect.isTrue(fib(3) == 2);
80 Expect.isTrue(fib(4) == 3);
81 Expect.isTrue(fib(5) == 5);
82 Expect.isTrue(fib(6) == 8);
83 Expect.isTrue(fib(7) == 13);
84 Expect.isTrue(fib(42) == 267914296);
85 Expect.isTrue(fib(3.14159) == 3);
86
87 test0();
88 test1();
89 test2();
90 test3();
91 }
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