SYN SYN

[p5sagit/p5-mst-13.2.git] / t / lib / trig.t

diff --git a/t/lib/trig.t b/t/lib/trig.t
index 20669f0..6949622 100755 (executable)
--- a/t/lib/trig.t
+++ b/t/lib/trig.t
@@ -10,7 +10,7 @@
 
 BEGIN {
     chdir 't' if -d 't';
-    unshift @INC, '../lib';
+    @INC = '../lib';
 }
 
 use Math::Trig;
@@ -26,10 +26,11 @@ if ($^O eq 'unicos') { # See lib/Math/Complex.pm and t/lib/complex.t.
 }
 
 sub near ($$;$) {
-    abs($_[0] - $_[1]) < (defined $_[2] ? $_[2] : $eps);
+    my $e = defined $_[2] ? $_[2] : $eps;
+    $_[1] ? (abs($_[0]/$_[1] - 1) < $e) : abs($_[0]) < $e;
 }
 
-print "1..20\n";
+print "1..23\n";
 
 $x = 0.9;
 print 'not ' unless (near(tan($x), sin($x) / cos($x)));
@@ -137,24 +138,42 @@ use Math::Trig ':radial';
 }
 
 {
-        use Math::Trig 'great_circle_distance';
+    use Math::Trig 'great_circle_distance';
 
-       print 'not '
-           unless (near(great_circle_distance(0, 0, 0, pi/2), pi/2));
-       print "ok 18\n";
+    print 'not '
+       unless (near(great_circle_distance(0, 0, 0, pi/2), pi/2));
+    print "ok 18\n";
 
-       print 'not '
-           unless (near(great_circle_distance(0, 0, pi, pi), pi));
-       print "ok 19\n";
+    print 'not '
+       unless (near(great_circle_distance(0, 0, pi, pi), pi));
+    print "ok 19\n";
 
-       # London to Tokyo.
-       my @L = (deg2rad(-0.5), deg2rad(90 - 51.3));
-        my @T = (deg2rad(139.8),deg2rad(90 - 35.7));
+    # London to Tokyo.
+    my @L = (deg2rad(-0.5), deg2rad(90 - 51.3));
+    my @T = (deg2rad(139.8),deg2rad(90 - 35.7));
 
-       my $km = great_circle_distance(@L, @T, 6378);
+    my $km = great_circle_distance(@L, @T, 6378);
 
-        print 'not ' unless (near($km, 9605.26637021388));
-       print "ok 20\n";
+    print 'not ' unless (near($km, 9605.26637021388));
+    print "ok 20\n";
+}
+
+{
+    my $R2D = 57.295779513082320876798154814169;
+
+    sub frac { $_[0] - int($_[0]) }
+
+    my $lotta_radians = deg2rad(1E+20, 1);
+    print "not " unless near($lotta_radians,  1E+20/$R2D);
+    print "ok 21\n";
+
+    my $negat_degrees = rad2deg(-1E20, 1);
+    print "not " unless near($negat_degrees, -1E+20*$R2D);
+    print "ok 22\n";
+
+    my $posit_degrees = rad2deg(-10000, 1);
+    print "not " unless near($posit_degrees, -10000*$R2D);
+    print "ok 23\n";
 }
 
 # eof