1#!./perl 2 3BEGIN { 4 chdir 't' if -d 't'; 5 @INC = '../lib'; 6 require './test.pl'; 7} 8 9plan tests => 16; 10 11# compile time evaluation 12 13$s = sqrt(2); 14is(substr($s,0,5), '1.414'); 15 16$s = exp(1); 17is(substr($s,0,7), '2.71828'); 18 19cmp_ok(exp(log(1)), '==', 1); 20 21# run time evaluation 22 23$x1 = 1; 24$x2 = 2; 25$s = sqrt($x2); 26is(substr($s,0,5), '1.414'); 27 28$s = exp($x1); 29is(substr($s,0,7), '2.71828'); 30 31cmp_ok(exp(log($x1)), '==', 1); 32 33# tests for transcendental functions 34 35my $pi = 3.1415926535897931160; 36my $pi_2 = 1.5707963267948965580; 37 38sub round { 39 my $result = shift; 40 return sprintf("%.9f", $result); 41} 42 43# sin() tests 44cmp_ok(sin(0), '==', 0.0); 45cmp_ok(round(sin($pi)), '==', 0.0); 46cmp_ok(round(sin(-1 * $pi)), '==', 0.0); 47cmp_ok(round(sin($pi_2)), '==', 1.0); 48cmp_ok(round(sin(-1 * $pi_2)), '==', -1.0); 49 50# cos() tests 51cmp_ok(cos(0), '==', 1.0); 52cmp_ok(round(cos($pi)), '==', -1.0); 53cmp_ok(round(cos(-1 * $pi)), '==', -1.0); 54cmp_ok(round(cos($pi_2)), '==', 0.0); 55cmp_ok(round(cos(-1 * $pi_2)), '==', 0.0); 56 57# atan2() tests were removed due to differing results from calls to 58# atan2() on various OS's and architectures. See perlport.pod for 59# more information. 60