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27
28// Test of constant folding of boolean-valued expressions.
29
30// See http://code.google.com/p/v8/issues/detail?id=406
31
32assertFalse(typeof(0) == "zero");
33assertTrue(typeof(0) != "zero");
34
35// The and and or truth tables with both operands constant.
36assertFalse(typeof(0) == "zero" && typeof(0) == "zero");
37assertFalse(typeof(0) == "zero" && typeof(0) != "zero");
38assertFalse(typeof(0) != "zero" && typeof(0) == "zero");
39assertTrue(typeof(0) != "zero" && typeof(0) != "zero");
40
41assertFalse(typeof(0) == "zero" || typeof(0) == "zero");
42assertTrue(typeof(0) == "zero" || typeof(0) != "zero");
43assertTrue(typeof(0) != "zero" || typeof(0) == "zero");
44assertTrue(typeof(0) != "zero" || typeof(0) != "zero");
45
46// Same with just the left operand constant.
47// Helper function to prevent simple constant folding.
48function one() { return 1; }
49
50assertFalse(typeof(0) == "zero" && one() < 0);
51assertFalse(typeof(0) == "zero" && one() > 0);
52assertFalse(typeof(0) != "zero" && one() < 0);
53assertTrue(typeof(0) != "zero" && one() > 0);
54
55assertFalse(typeof(0) == "zero" || one() < 0);
56assertTrue(typeof(0) == "zero" || one() > 0);
57assertTrue(typeof(0) != "zero" || one() < 0);
58assertTrue(typeof(0) != "zero" || one() > 0);
59
60// Same with just the right operand constant.
61assertFalse(one() < 0 && typeof(0) == "zero");
62assertFalse(one() < 0 && typeof(0) != "zero");
63assertFalse(one() > 0 && typeof(0) == "zero");
64assertTrue(one() > 0 && typeof(0) != "zero");
65
66assertFalse(one() < 0 || typeof(0) == "zero");
67assertTrue(one() < 0 || typeof(0) != "zero");
68assertTrue(one() > 0 || typeof(0) == "zero");
69assertTrue(one() > 0 || typeof(0) != "zero");
70