1Log::Any::Adapter::TAP(U3s)er Contributed Perl DocumentatLioogn::Any::Adapter::TAP(3)
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NAME

6       Log::Any::Adapter::TAP - Logging adapter suitable for use in TAP
7       testcases
8

VERSION

10       version 0.003003
11

DESCRIPTION

13       When running testcases, you probably want to see some of your logging
14       output.  One sensible approach is to have all "warn" and more serious
15       messages emitted as "diag" output on STDERR, and less serious messages
16       emitted as "note" comments on STDOUT.
17
18       So, thats what this logging adapter does.  Simply say
19
20         use Log::Any::Adapter 'TAP';
21
22       at the start of your testcase, and now you have your logging output as
23       part of your TAP stream.
24
25       By default, "debug" and "trace" are suppressed, but you can enable them
26       with "TAP_LOG_FILTER" or the "filter" attribute.  See below.
27

ENVIRONMENT

29   TAP_LOG_FILTER
30       Specify the default filter value.  See attribute "filter" for details.
31
32       You may also specify defaults per-category, using this syntax:
33
34         $default_level,$package_1=$level,...,$package_n=$level
35
36       So, for example:
37
38         TAP_LOG_FILTER=trace,MyPackage=none,NoisyPackage=warn prove -lv
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40   TAP_LOG_ORIGIN
41       Set this variable to 1 to show which category the message came from, or
42       2 to see the file and line number it came from, or 3 to see both.
43
44   TAP_LOG_SHOW_USAGE
45       Defaults to true, which prints a TAP comment briefing the user about
46       these environment variables when Log::Any::Adapter::TAP is first
47       loaded.
48
49       Set TAP_LOG_SHOW_USAGE=0 to suppress this message.
50

ATTRIBUTES

52   filter
53         use Log::Any::Adapter 'TAP', filter => 'info';
54         use Log::Any::Adapter 'TAP', filter => 'debug+3';
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56       Messages with a log level equal to or less than the filter are
57       suppressed.
58
59       Defaults to "TAP_LOG_FILTER", or "debug" which suppresses "debug" and
60       "trace" messages.
61
62       Filter may be:
63
64       ·   Any of the log level names or level aliases defined in Log::Any.
65
66       ·   "none" or "undef", to filter nothing (print all log levels).
67
68       ·   A value of "all", to filter everything (print nothing).
69
70       The filter level may end with a "+N" or "-N" indicating an offset from
71       the named level.  The numeric values increase with importance of the
72       message, so "debug-1" is equivalent to "trace" and "debug+1" is
73       equivalent to "info".  This differs from syslog, where increasing
74       numbers are less important.  (why did they choose that??)
75
76   dumper (DEPRECATED, unusable in Log::Any >= 0.9)
77         use Log::Any::Adapter 'TAP', dumper => sub { my $val=shift; ... };
78
79       This feature lets you use a custom dumper in the printf-style logging
80       functions.  However, these are no longer handled by the adapter in new
81       versions of Log::Any, so you need to use a custom Proxy class in your
82       log-producing module.
83

METHODS

85   new
86       See "new" in Log::Any::Adapter::Base.  Accepts the above attributes.
87
88   write_msg
89         $self->write_msg( $level_name, $message_string )
90
91       This is an internal method which all the other logging methods call.
92       You can override it if you want to create a derived logger that handles
93       line wrapping differently, or write to different file handles.
94
95   default_dumper
96         $dumper= $class->default_dumper;
97         $string = $dumper->( $perl_data );
98
99       Default value for the 'dumper' attribute.
100
101       This returns a coderef which can dump a value in "some human readable
102       format".  Currently it uses Data::Dumper with a max depth of 4.  Do not
103       depend on this default; it is only for human consumption, and might
104       change to a more friendly format in the future.
105

LOGGING METHODS

107       This module has all the standard logging methods from "LOG LEVELS" in
108       Log::Any.
109
110       Note that the regular logging methods are only specified to take a
111       single string.  This module in the past supported passing objects as
112       additional parameters, and having them stringified with a custom
113       dumper, caatching exceptions thrown during stringification.  With the
114       new Log::Any design, these things are decided in the producing module,
115       so these features are no longer possible.
116
117       If this module does receive multiple arguments or have its printf-
118       formatting methods called, it does the following:
119
120       For regular logging functions (i.e. "warn", "info") the arguments are
121       stringified and concatenated.  Errors during stringify or printing are
122       not caught.
123
124       For printf-like logging functions (i.e. "warnf", "infof") reference
125       arguments are passed to "$self->dumper" before passing them to sprintf.
126       Errors are not caught here either.
127
128       For any log level below "info", errors ARE caught with an "eval" and
129       printed as a warning.  This is to prevent sloppy debugging code from
130       ever crashing a production system.  Also, references are passed to
131       "$self->dumper" even for the regular methods.
132

AUTHOR

134       Michael Conrad <mike@nrdvana.net>
135

137       This software is copyright (c) 2016 by Michael Conrad.
138
139       This is free software; you can redistribute it and/or modify it under
140       the same terms as the Perl 5 programming language system itself.
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144perl v5.30.0                      2019-07-26         Log::Any::Adapter::TAP(3)
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