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