FAQ sync.

[p5sagit/p5-mst-13.2.git] / t / op / arith.t

diff --git a/t/op/arith.t b/t/op/arith.t
index 2847acb..6e61477 100755 (executable)
--- a/t/op/arith.t
+++ b/t/op/arith.t
@@ -1,6 +1,6 @@
 #!./perl -w
 
-print "1..109\n";
+print "1..130\n";
 
 sub try ($$) {
    print +($_[1] ? "ok" : "not ok"), " $_[0]\n";
@@ -12,6 +12,18 @@ sub tryeq ($$$) {
     print "not ok $_[0] # $_[1] != $_[2]\n";
   }
 }
+sub tryeq_sloppy ($$$) {
+  if ($_[1] == $_[2]) {
+    print "ok $_[0]\n";
+  } else {
+    my $error = abs ($_[1] - $_[2]) / $_[1];
+    if ($error < 1e-10) {
+      print "ok $_[0] # $_[1] is close to $_[2], \$^O eq $^O\n";
+    } else {
+      print "not ok $_[0] # $_[1] != $_[2]\n";
+    }
+  }
+}
 
 tryeq 1,  13 %  4, 1;
 tryeq 2, -13 %  4, 3;
@@ -204,3 +216,36 @@ tryeq 106, 46339 * 46341, 0x7ffea80f;
 tryeq 107, 46339 * -46341, -0x7ffea80f;
 tryeq 108, -46339 * 46341, -0x7ffea80f;
 tryeq 109, -46339 * -46341, 0x7ffea80f;
+
+# leading space should be ignored
+
+tryeq 110, 1 + " 1", 2;
+tryeq 111, 3 + " -1", 2;
+tryeq 112, 1.2, " 1.2";
+tryeq 113, -1.2, " -1.2";
+
+# divide
+
+tryeq 114, 28/14, 2;
+tryeq 115, 28/-7, -4;
+tryeq 116, -28/4, -7;
+tryeq 117, -28/-2, 14;
+
+tryeq 118, 0x80000000/1, 0x80000000;
+tryeq 119, 0x80000000/-1, -0x80000000;
+tryeq 120, -0x80000000/1, -0x80000000;
+tryeq 121, -0x80000000/-1, 0x80000000;
+
+# The example for sloppy divide, rigged to avoid the peephole optimiser.
+tryeq 122, "20." / "5.", 4;
+
+tryeq 123, 2.5 / 2, 1.25;
+tryeq 124, 3.5 / -2, -1.75;
+tryeq 125, -4.5 / 2, -2.25;
+tryeq 126, -5.5 / -2, 2.75;
+
+# Bluuurg if your floating point can't accurately cope with powers of 2
+tryeq_sloppy 127, 18446744073709551616/1, 18446744073709551616; # Bluuurg
+tryeq 128, 18446744073709551616/2, 9223372036854775808;
+tryeq 129, 18446744073709551616/4294967296, 4294967296;
+tryeq 130, 18446744073709551616/9223372036854775808, 2;