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1 | package Test::Simple; |
2 | |
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3 | use 5.004; |
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4 | |
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5 | use strict 'vars'; |
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6 | use vars qw($VERSION @ISA @EXPORT); |
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7 | $VERSION = '0.63'; |
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8 | $VERSION = eval $VERSION; # make the alpha version come out as a number |
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9 | |
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10 | use Test::Builder::Module; |
11 | @ISA = qw(Test::Builder::Module); |
12 | @EXPORT = qw(ok); |
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13 | |
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14 | my $CLASS = __PACKAGE__; |
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15 | |
16 | |
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17 | =head1 NAME |
18 | |
19 | Test::Simple - Basic utilities for writing tests. |
20 | |
21 | =head1 SYNOPSIS |
22 | |
23 | use Test::Simple tests => 1; |
24 | |
25 | ok( $foo eq $bar, 'foo is bar' ); |
26 | |
27 | |
28 | =head1 DESCRIPTION |
29 | |
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30 | ** If you are unfamiliar with testing B<read Test::Tutorial> first! ** |
31 | |
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32 | This is an extremely simple, extremely basic module for writing tests |
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33 | suitable for CPAN modules and other pursuits. If you wish to do more |
34 | complicated testing, use the Test::More module (a drop-in replacement |
35 | for this one). |
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36 | |
37 | The basic unit of Perl testing is the ok. For each thing you want to |
38 | test your program will print out an "ok" or "not ok" to indicate pass |
39 | or fail. You do this with the ok() function (see below). |
40 | |
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41 | The only other constraint is you must pre-declare how many tests you |
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42 | plan to run. This is in case something goes horribly wrong during the |
43 | test and your test program aborts, or skips a test or whatever. You |
44 | do this like so: |
45 | |
46 | use Test::Simple tests => 23; |
47 | |
48 | You must have a plan. |
49 | |
50 | |
51 | =over 4 |
52 | |
53 | =item B<ok> |
54 | |
55 | ok( $foo eq $bar, $name ); |
56 | ok( $foo eq $bar ); |
57 | |
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58 | ok() is given an expression (in this case C<$foo eq $bar>). If it's |
59 | true, the test passed. If it's false, it didn't. That's about it. |
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60 | |
61 | ok() prints out either "ok" or "not ok" along with a test number (it |
62 | keeps track of that for you). |
63 | |
64 | # This produces "ok 1 - Hell not yet frozen over" (or not ok) |
65 | ok( get_temperature($hell) > 0, 'Hell not yet frozen over' ); |
66 | |
67 | If you provide a $name, that will be printed along with the "ok/not |
68 | ok" to make it easier to find your test when if fails (just search for |
69 | the name). It also makes it easier for the next guy to understand |
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70 | what your test is for. It's highly recommended you use test names. |
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71 | |
72 | All tests are run in scalar context. So this: |
73 | |
74 | ok( @stuff, 'I have some stuff' ); |
75 | |
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76 | will do what you mean (fail if stuff is empty) |
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77 | |
78 | =cut |
79 | |
80 | sub ok ($;$) { |
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81 | $CLASS->builder->ok(@_); |
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82 | } |
83 | |
84 | |
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85 | =back |
86 | |
87 | Test::Simple will start by printing number of tests run in the form |
88 | "1..M" (so "1..5" means you're going to run 5 tests). This strange |
89 | format lets Test::Harness know how many tests you plan on running in |
90 | case something goes horribly wrong. |
91 | |
92 | If all your tests passed, Test::Simple will exit with zero (which is |
93 | normal). If anything failed it will exit with how many failed. If |
94 | you run less (or more) tests than you planned, the missing (or extras) |
95 | will be considered failures. If no tests were ever run Test::Simple |
96 | will throw a warning and exit with 255. If the test died, even after |
97 | having successfully completed all its tests, it will still be |
98 | considered a failure and will exit with 255. |
99 | |
100 | So the exit codes are... |
101 | |
102 | 0 all tests successful |
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103 | 255 test died or all passed but wrong # of tests run |
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104 | any other number how many failed (including missing or extras) |
105 | |
106 | If you fail more than 254 tests, it will be reported as 254. |
107 | |
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108 | This module is by no means trying to be a complete testing system. |
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109 | It's just to get you started. Once you're off the ground its |
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110 | recommended you look at L<Test::More>. |
111 | |
112 | |
113 | =head1 EXAMPLE |
114 | |
115 | Here's an example of a simple .t file for the fictional Film module. |
116 | |
117 | use Test::Simple tests => 5; |
118 | |
119 | use Film; # What you're testing. |
120 | |
121 | my $btaste = Film->new({ Title => 'Bad Taste', |
122 | Director => 'Peter Jackson', |
123 | Rating => 'R', |
124 | NumExplodingSheep => 1 |
125 | }); |
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126 | ok( defined($btaste) && ref $btaste eq 'Film, 'new() works' ); |
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127 | |
128 | ok( $btaste->Title eq 'Bad Taste', 'Title() get' ); |
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129 | ok( $btaste->Director eq 'Peter Jackson', 'Director() get' ); |
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130 | ok( $btaste->Rating eq 'R', 'Rating() get' ); |
131 | ok( $btaste->NumExplodingSheep == 1, 'NumExplodingSheep() get' ); |
132 | |
133 | It will produce output like this: |
134 | |
135 | 1..5 |
136 | ok 1 - new() works |
137 | ok 2 - Title() get |
138 | ok 3 - Director() get |
139 | not ok 4 - Rating() get |
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140 | # Failed test 'Rating() get' |
141 | # in t/film.t at line 14. |
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142 | ok 5 - NumExplodingSheep() get |
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143 | # Looks like you failed 1 tests of 5 |
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144 | |
145 | Indicating the Film::Rating() method is broken. |
146 | |
147 | |
148 | =head1 CAVEATS |
149 | |
150 | Test::Simple will only report a maximum of 254 failures in its exit |
151 | code. If this is a problem, you probably have a huge test script. |
152 | Split it into multiple files. (Otherwise blame the Unix folks for |
153 | using an unsigned short integer as the exit status). |
154 | |
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155 | Because VMS's exit codes are much, much different than the rest of the |
156 | universe, and perl does horrible mangling to them that gets in my way, |
157 | it works like this on VMS. |
158 | |
159 | 0 SS$_NORMAL all tests successful |
160 | 4 SS$_ABORT something went wrong |
161 | |
162 | Unfortunately, I can't differentiate any further. |
163 | |
164 | |
165 | =head1 NOTES |
166 | |
167 | Test::Simple is B<explicitly> tested all the way back to perl 5.004. |
168 | |
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169 | Test::Simple is thread-safe in perl 5.8.0 and up. |
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170 | |
171 | =head1 HISTORY |
172 | |
173 | This module was conceived while talking with Tony Bowden in his |
174 | kitchen one night about the problems I was having writing some really |
175 | complicated feature into the new Testing module. He observed that the |
176 | main problem is not dealing with these edge cases but that people hate |
177 | to write tests B<at all>. What was needed was a dead simple module |
178 | that took all the hard work out of testing and was really, really easy |
179 | to learn. Paul Johnson simultaneously had this idea (unfortunately, |
180 | he wasn't in Tony's kitchen). This is it. |
181 | |
182 | |
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183 | =head1 SEE ALSO |
184 | |
185 | =over 4 |
186 | |
187 | =item L<Test::More> |
188 | |
189 | More testing functions! Once you outgrow Test::Simple, look at |
190 | Test::More. Test::Simple is 100% forward compatible with Test::More |
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191 | (i.e. you can just use Test::More instead of Test::Simple in your |
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192 | programs and things will still work). |
193 | |
194 | =item L<Test> |
195 | |
196 | The original Perl testing module. |
197 | |
198 | =item L<Test::Unit> |
199 | |
200 | Elaborate unit testing. |
201 | |
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202 | =item L<Test::Inline>, L<SelfTest> |
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203 | |
204 | Embed tests in your code! |
205 | |
206 | =item L<Test::Harness> |
207 | |
208 | Interprets the output of your test program. |
209 | |
210 | =back |
211 | |
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212 | |
213 | =head1 AUTHORS |
214 | |
215 | Idea by Tony Bowden and Paul Johnson, code by Michael G Schwern |
216 | E<lt>schwern@pobox.comE<gt>, wardrobe by Calvin Klein. |
217 | |
218 | |
219 | =head1 COPYRIGHT |
220 | |
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221 | Copyright 2001, 2002, 2004 by Michael G Schwern E<lt>schwern@pobox.comE<gt>. |
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222 | |
223 | This program is free software; you can redistribute it and/or |
224 | modify it under the same terms as Perl itself. |
225 | |
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226 | See F<http://www.perl.com/perl/misc/Artistic.html> |
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227 | |
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228 | =cut |
229 | |
230 | 1; |