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1 | #!./perl |
2 | |
3 | BEGIN { |
4 | chdir 't' if -d 't'; |
5 | @INC = '../lib'; |
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6 | require Config; |
7 | if (($Config::Config{'extensions'} !~ /\bB\b/) ){ |
8 | print "1..0 # Skip -- Perl configured without B module\n"; |
9 | exit 0; |
10 | } |
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11 | } |
12 | |
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13 | use Test::More tests => 16; |
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14 | |
15 | use_ok( 'B::Terse' ); |
16 | |
17 | # indent should return a string indented four spaces times the argument |
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18 | is( B::Terse::indent(2), ' ' x 8, 'indent with an argument' ); |
19 | is( B::Terse::indent(), '', 'indent with no argument' ); |
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20 | |
21 | # this should fail without a reference |
22 | eval { B::Terse::terse('scalar') }; |
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23 | like( $@, qr/not a reference/, 'terse() fed bad parameters' ); |
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24 | |
25 | # now point it at a sub and see what happens |
26 | sub foo {} |
27 | |
28 | my $sub; |
29 | eval{ $sub = B::Terse::compile('', 'foo') }; |
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30 | is( $@, '', 'compile()' ); |
31 | ok( defined &$sub, 'valid subref back from compile()' ); |
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32 | |
33 | # and point it at a real sub and hope the returned ops look alright |
34 | my $out = tie *STDOUT, 'TieOut'; |
35 | $sub = B::Terse::compile('', 'bar'); |
36 | $sub->(); |
37 | |
38 | # now build some regexes that should match the dumped ops |
39 | my ($hex, $op) = ('\(0x[a-f0-9]+\)', '\s+\w+'); |
40 | my %ops = map { $_ => qr/$_ $hex$op/ } |
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41 | qw ( OP COP LOOP PMOP UNOP BINOP LOGOP LISTOP PVOP ); |
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42 | |
43 | # split up the output lines into individual ops (terse is, well, terse!) |
44 | # use an array here so $_ is modifiable |
45 | my @lines = split(/\n+/, $out->read); |
46 | foreach (@lines) { |
47 | next unless /\S/; |
48 | s/^\s+//; |
49 | if (/^([A-Z]+)\s+/) { |
50 | my $op = $1; |
51 | next unless exists $ops{$op}; |
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52 | like( $_, $ops{$op}, "$op " ); |
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53 | delete $ops{$op}; |
54 | s/$ops{$op}//; |
55 | redo if $_; |
56 | } |
57 | } |
58 | |
59 | warn "# didn't find " . join(' ', keys %ops) if keys %ops; |
60 | |
61 | # XXX: |
62 | # this tries to get at all tersified optypes in B::Terse |
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63 | # if you can think of a way to produce AV, NULL, PADOP, or SPECIAL, |
64 | # add it to the regex above too. (PADOPs are currently only produced |
65 | # under ithreads, though). |
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66 | # |
67 | use vars qw( $a $b ); |
68 | sub bar { |
69 | # OP SVOP COP IV here or in sub definition |
70 | my @bar = (1, 2, 3); |
71 | |
72 | # got a GV here |
73 | my $foo = $a + $b; |
74 | |
75 | # NV here |
76 | $a = 1.234; |
77 | |
78 | # this is awful, but it gives a PMOP |
79 | my $boo = split('', $foo); |
80 | |
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81 | # PVOP, LOOP |
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82 | LOOP: for (1 .. 10) { |
83 | last LOOP if $_ % 2; |
84 | } |
85 | |
86 | # make a PV |
87 | $foo = "a string"; |
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88 | |
89 | # make an OP_SUBSTCONT |
90 | $foo =~ s/(a)/$1/; |
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91 | } |
92 | |
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93 | # Schwern's example of finding an RV |
94 | my $path = join " ", map { qq["-I$_"] } @INC; |
95 | $path = '-I::lib -MMac::err=unix' if $^O eq 'MacOS'; |
96 | my $redir = $^O eq 'MacOS' ? '' : "2>&1"; |
97 | my $items = qx{$^X $path "-MO=Terse" -le "print \\42" $redir}; |
98 | like( $items, qr/RV $hex \\42/, 'RV' ); |
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99 | |
100 | package TieOut; |
101 | |
102 | sub TIEHANDLE { |
103 | bless( \(my $out), $_[0] ); |
104 | } |
105 | |
106 | sub PRINT { |
107 | my $self = shift; |
108 | $$self .= join('', @_); |
109 | } |
110 | |
111 | sub PRINTF { |
112 | my $self = shift; |
113 | $$self .= sprintf(@_); |
114 | } |
115 | |
116 | sub read { |
117 | my $self = shift; |
118 | return substr($$self, 0, length($$self), ''); |
119 | } |