Commit | Line | Data |
54310121 |
1 | #!./perl |
2 | |
3 | BEGIN { |
4 | chdir 't' if -d 't'; |
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5 | @INC = '../lib'; |
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6 | } |
7 | |
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8 | use warnings; |
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9 | use vars qw{ @warnings }; |
10 | BEGIN { # ...and save 'em for later |
11 | $SIG{'__WARN__'} = sub { push @warnings, @_ } |
12 | } |
803b07a7 |
13 | END { print STDERR @warnings } |
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14 | |
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15 | |
16 | use strict; |
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17 | use Test::More tests => 75; |
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18 | my $TB = Test::More->builder; |
19 | |
20 | BEGIN { use_ok('constant'); } |
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21 | |
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22 | use constant PI => 4 * atan2 1, 1; |
23 | |
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24 | ok defined PI, 'basic scalar constant'; |
25 | is substr(PI, 0, 7), '3.14159', ' in substr()'; |
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26 | |
27 | sub deg2rad { PI * $_[0] / 180 } |
28 | |
29 | my $ninety = deg2rad 90; |
30 | |
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31 | cmp_ok abs($ninety - 1.5707), '<', 0.0001, ' in math expression'; |
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32 | |
33 | use constant UNDEF1 => undef; # the right way |
34 | use constant UNDEF2 => ; # the weird way |
35 | use constant 'UNDEF3' ; # the 'short' way |
36 | use constant EMPTY => ( ) ; # the right way for lists |
37 | |
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38 | is UNDEF1, undef, 'right way to declare an undef'; |
39 | is UNDEF2, undef, ' weird way'; |
40 | is UNDEF3, undef, ' short way'; |
41 | |
42 | # XXX Why is this way different than the other ones? |
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43 | my @undef = UNDEF1; |
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44 | is @undef, 1; |
45 | is $undef[0], undef; |
46 | |
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47 | @undef = UNDEF2; |
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48 | is @undef, 0; |
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49 | @undef = UNDEF3; |
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50 | is @undef, 0; |
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51 | @undef = EMPTY; |
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52 | is @undef, 0; |
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53 | |
54 | use constant COUNTDOWN => scalar reverse 1, 2, 3, 4, 5; |
55 | use constant COUNTLIST => reverse 1, 2, 3, 4, 5; |
56 | use constant COUNTLAST => (COUNTLIST)[-1]; |
57 | |
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58 | is COUNTDOWN, '54321'; |
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59 | my @cl = COUNTLIST; |
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60 | is @cl, 5; |
61 | is COUNTDOWN, join '', @cl; |
62 | is COUNTLAST, 1; |
63 | is((COUNTLIST)[1], 4); |
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64 | |
65 | use constant ABC => 'ABC'; |
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66 | is "abc${\( ABC )}abc", "abcABCabc"; |
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67 | |
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68 | use constant DEF => 'D', 'E', chr ord 'F'; |
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69 | is "d e f @{[ DEF ]} d e f", "d e f D E F d e f"; |
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70 | |
71 | use constant SINGLE => "'"; |
72 | use constant DOUBLE => '"'; |
73 | use constant BACK => '\\'; |
74 | my $tt = BACK . SINGLE . DOUBLE ; |
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75 | is $tt, q(\\'"); |
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76 | |
77 | use constant MESS => q('"'\\"'"\\); |
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78 | is MESS, q('"'\\"'"\\); |
79 | is length(MESS), 8; |
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80 | |
81 | use constant TRAILING => '12 cats'; |
82 | { |
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83 | no warnings 'numeric'; |
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84 | cmp_ok TRAILING, '==', 12; |
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85 | } |
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86 | is TRAILING, '12 cats'; |
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87 | |
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88 | use constant LEADING => " \t1234"; |
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89 | cmp_ok LEADING, '==', 1234; |
90 | is LEADING, " \t1234"; |
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91 | |
92 | use constant ZERO1 => 0; |
93 | use constant ZERO2 => 0.0; |
94 | use constant ZERO3 => '0.0'; |
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95 | is ZERO1, '0'; |
96 | is ZERO2, '0'; |
97 | is ZERO3, '0.0'; |
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98 | |
99 | { |
100 | package Other; |
101 | use constant PI => 3.141; |
102 | } |
103 | |
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104 | cmp_ok(abs(PI - 3.1416), '<', 0.0001); |
105 | is Other::PI, 3.141; |
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106 | |
107 | use constant E2BIG => $! = 7; |
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108 | cmp_ok E2BIG, '==', 7; |
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109 | # This is something like "Arg list too long", but the actual message |
110 | # text may vary, so we can't test much better than this. |
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111 | cmp_ok length(E2BIG), '>', 6; |
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112 | |
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113 | is @warnings, 0 or diag join "\n", "unexpected warning", @warnings; |
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114 | @warnings = (); # just in case |
115 | undef &PI; |
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116 | ok @warnings && ($warnings[0] =~ /Constant sub.* undefined/) or |
117 | diag join "\n", "unexpected warning", @warnings; |
118 | shift @warnings; |
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119 | |
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120 | is @warnings, 0, "unexpected warning"; |
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121 | |
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122 | my $curr_test = $TB->current_test; |
123 | use constant CSCALAR => \"ok 37\n"; |
124 | use constant CHASH => { foo => "ok 38\n" }; |
125 | use constant CARRAY => [ undef, "ok 39\n" ]; |
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126 | use constant CCODE => sub { "ok $_[0]\n" }; |
127 | |
128 | print ${+CSCALAR}; |
129 | print CHASH->{foo}; |
130 | print CARRAY->[1]; |
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131 | print CCODE->($curr_test+4); |
132 | |
133 | $TB->current_test($curr_test+4); |
134 | |
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135 | eval q{ CCODE->{foo} }; |
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136 | ok scalar($@ =~ /^Constant is not a HASH/); |
137 | |
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138 | |
139 | # Allow leading underscore |
140 | use constant _PRIVATE => 47; |
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141 | is _PRIVATE, 47; |
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142 | |
143 | # Disallow doubled leading underscore |
144 | eval q{ |
145 | use constant __DISALLOWED => "Oops"; |
146 | }; |
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147 | like $@, qr/begins with '__'/; |
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148 | |
149 | # Check on declared() and %declared. This sub should be EXACTLY the |
150 | # same as the one quoted in the docs! |
151 | sub declared ($) { |
152 | use constant 1.01; # don't omit this! |
153 | my $name = shift; |
154 | $name =~ s/^::/main::/; |
155 | my $pkg = caller; |
156 | my $full_name = $name =~ /::/ ? $name : "${pkg}::$name"; |
157 | $constant::declared{$full_name}; |
158 | } |
159 | |
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160 | ok declared 'PI'; |
161 | ok $constant::declared{'main::PI'}; |
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162 | |
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163 | ok !declared 'PIE'; |
164 | ok !$constant::declared{'main::PIE'}; |
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165 | |
166 | { |
167 | package Other; |
168 | use constant IN_OTHER_PACK => 42; |
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169 | ::ok ::declared 'IN_OTHER_PACK'; |
170 | ::ok $constant::declared{'Other::IN_OTHER_PACK'}; |
171 | ::ok ::declared 'main::PI'; |
172 | ::ok $constant::declared{'main::PI'}; |
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173 | } |
174 | |
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175 | ok declared 'Other::IN_OTHER_PACK'; |
176 | ok $constant::declared{'Other::IN_OTHER_PACK'}; |
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177 | |
178 | @warnings = (); |
179 | eval q{ |
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180 | no warnings; |
d3a7d8c7 |
181 | use warnings 'constant'; |
182 | use constant 'BEGIN' => 1 ; |
183 | use constant 'INIT' => 1 ; |
184 | use constant 'CHECK' => 1 ; |
185 | use constant 'END' => 1 ; |
186 | use constant 'DESTROY' => 1 ; |
187 | use constant 'AUTOLOAD' => 1 ; |
188 | use constant 'STDIN' => 1 ; |
189 | use constant 'STDOUT' => 1 ; |
190 | use constant 'STDERR' => 1 ; |
191 | use constant 'ARGV' => 1 ; |
192 | use constant 'ARGVOUT' => 1 ; |
193 | use constant 'ENV' => 1 ; |
194 | use constant 'INC' => 1 ; |
195 | use constant 'SIG' => 1 ; |
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196 | }; |
197 | |
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198 | is @warnings, 15 ; |
199 | my @Expected_Warnings = |
200 | ( |
201 | qr/^Constant name 'BEGIN' is a Perl keyword at/, |
202 | qr/^Constant subroutine BEGIN redefined at/, |
203 | qr/^Constant name 'INIT' is a Perl keyword at/, |
204 | qr/^Constant name 'CHECK' is a Perl keyword at/, |
205 | qr/^Constant name 'END' is a Perl keyword at/, |
206 | qr/^Constant name 'DESTROY' is a Perl keyword at/, |
207 | qr/^Constant name 'AUTOLOAD' is a Perl keyword at/, |
208 | qr/^Constant name 'STDIN' is forced into package main:: a/, |
209 | qr/^Constant name 'STDOUT' is forced into package main:: at/, |
210 | qr/^Constant name 'STDERR' is forced into package main:: at/, |
211 | qr/^Constant name 'ARGV' is forced into package main:: at/, |
212 | qr/^Constant name 'ARGVOUT' is forced into package main:: at/, |
213 | qr/^Constant name 'ENV' is forced into package main:: at/, |
214 | qr/^Constant name 'INC' is forced into package main:: at/, |
215 | qr/^Constant name 'SIG' is forced into package main:: at/, |
216 | ); |
217 | for my $idx (0..$#warnings) { |
218 | like $warnings[$idx], $Expected_Warnings[$idx]; |
219 | } |
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220 | @warnings = (); |
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221 | |
222 | |
223 | use constant { |
224 | THREE => 3, |
225 | FAMILY => [ qw( John Jane Sally ) ], |
226 | AGES => { John => 33, Jane => 28, Sally => 3 }, |
227 | RFAM => [ [ qw( John Jane Sally ) ] ], |
228 | SPIT => sub { shift }, |
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229 | }; |
230 | |
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231 | is @{+FAMILY}, THREE; |
232 | is @{+FAMILY}, @{RFAM->[0]}; |
233 | is FAMILY->[2], RFAM->[0]->[2]; |
234 | is AGES->{FAMILY->[1]}, 28; |
235 | is THREE**3, SPIT->(@{+FAMILY}**3); |
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236 | |
237 | # Allow name of digits/underscores only if it begins with underscore |
238 | { |
239 | use warnings FATAL => 'constant'; |
240 | eval q{ |
241 | use constant _1_2_3 => 'allowed'; |
242 | }; |
243 | ok( $@ eq '' ); |
244 | } |