X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Flib%2Ftrig.t;h=6949622f0aa1b7b3824115e0e2175b838d9cdf69;hb=22d4bb9ccb8701e68f9243547d7e3a3c55f70908;hp=20669f0bd97e311086eea5faccbae02a9cd74c62;hpb=4b19af017623bfa3bb72bb164598a517f586e0d3;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/lib/trig.t b/t/lib/trig.t
index 20669f0..6949622 100755
--- 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