test::harness::straps.3

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.\" ========================================================================
.\"
.IX Title "Test::Harness::Straps 3"
.TH Test::Harness::Straps 3 "2007-12-18" "perl v5.10.0" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Test::Harness::Straps \- detailed analysis of test results
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Test::Harness::Straps;
\&
\&  my $strap = Test::Harness::Straps\->new;
\&
\&  # Various ways to interpret a test
\&  my $results = $strap\->analyze($name, \e@test_output);
\&  my $results = $strap\->analyze_fh($name, $test_filehandle);
\&  my $results = $strap\->analyze_file($test_file);
\&
\&  # UNIMPLEMENTED
\&  my %total = $strap\->total_results;
\&
\&  # Altering the behavior of the strap  UNIMPLEMENTED
\&  my $verbose_output = $strap\->dump_verbose();
\&  $strap\->dump_verbose_fh($output_filehandle);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fB\s-1THIS\s0 \s-1IS\s0 \s-1ALPHA\s0 \s-1SOFTWARE\s0\fR in that the interface is subject to change
in incompatible ways.  It is otherwise stable.
.PP
Test::Harness is limited to printing out its results.  This makes
analysis of the test results difficult for anything but a human.  To
make it easier for programs to work with test results, we provide
Test::Harness::Straps.  Instead of printing the results, straps
provide them as raw data.  You can also configure how the tests are to
be run.
.PP
The interface is currently incomplete.  \fIPlease\fR contact the author
if you'd like a feature added or something change or just have
comments.
.SH "CONSTRUCTION"
.IX Header "CONSTRUCTION"
.Sh "\fInew()\fP"
.IX Subsection "new()"
.Vb 1
\&  my $strap = Test::Harness::Straps\->new;
.Ve
.PP
Initialize a new strap.
.PP
.Vb 1
\&  $strap\->_init;
.Ve
.PP
Initialize the internal state of a strap to make it ready for parsing.
.SH "ANALYSIS"
.IX Header "ANALYSIS"
.ie n .Sh "$strap\fP\->analyze( \f(CW$name, \e@output_lines )"
.el .Sh "\f(CW$strap\fP\->analyze( \f(CW$name\fP, \e@output_lines )"
.IX Subsection "$strap->analyze( $name, @output_lines )"
.Vb 1
\&    my $results = $strap\->analyze($name, \e@test_output);
.Ve
.PP
Analyzes the output of a single test, assigning it the given \f(CW$name\fR
for use in the total report.  Returns the \f(CW$results\fR of the test.
See Results.
.PP
\&\f(CW@test_output\fR should be the raw output from the test, including
newlines.
.PP
.Vb 1
\&    my $results = $strap\->analyze_fh($name, $test_filehandle);
.Ve
.PP
Like \f(CW\*(C`analyze\*(C'\fR, but it reads from the given filehandle.
.ie n .Sh "$strap\fP\->analyze_file( \f(CW$test_file )"
.el .Sh "\f(CW$strap\fP\->analyze_file( \f(CW$test_file\fP )"
.IX Subsection "$strap->analyze_file( $test_file )"
.Vb 1
\&    my $results = $strap\->analyze_file($test_file);
.Ve
.PP
Like \f(CW\*(C`analyze\*(C'\fR, but it runs the given \f(CW$test_file\fR and parses its
results.  It will also use that name for the total report.
.PP
Returns the full command line that will be run to test \fI\f(CI$file\fI\fR.
.PP
Returns the command that runs the test.  Combine this with \f(CW\*(C`_switches()\*(C'\fR
to build a command line.
.PP
Typically this is \f(CW$^X\fR, but you can set \f(CW$ENV{HARNESS_PERL}\fR
to use a different Perl than what you're running the harness under.
This might be to run a threaded Perl, for example.
.PP
You can also overload this method if you've built your own strap subclass,
such as a \s-1PHP\s0 interpreter for a PHP-based strap.
.PP
Formats and returns the switches necessary to run the test.
.PP
Returns only defined, non-blank, trimmed switches from the parms passed.
.PP
.Vb 1
\&  local $ENV{PERL5LIB} = $self\->_INC2PERL5LIB;
.Ve
.PP
Takes the current value of \f(CW@INC\fR and turns it into something suitable
for putting onto \f(CW\*(C`PERL5LIB\*(C'\fR.
.PP
.Vb 1
\&  my @filtered_inc = $self\->_filtered_INC;
.Ve
.PP
Shortens \f(CW@INC\fR by removing redundant and unnecessary entries.
Necessary for OSes with limited command line lengths, like \s-1VMS\s0.
.PP
.Vb 1
\&  $self\->_restore_PERL5LIB;
.Ve
.PP
This restores the original value of the \f(CW\*(C`PERL5LIB\*(C'\fR environment variable.
Necessary on \s-1VMS\s0, otherwise a no-op.
.SH "Parsing"
.IX Header "Parsing"
Methods for identifying what sort of line you're looking at.
.PP
.Vb 1
\&    my $is_diagnostic = $strap\->_is_diagnostic($line, \e$comment);
.Ve
.PP
Checks if the given line is a comment.  If so, it will place it into
\&\f(CW$comment\fR (sans #).
.PP
.Vb 1
\&  my $is_header = $strap\->_is_header($line);
.Ve
.PP
Checks if the given line is a header (1..M) line.  If so, it places how
many tests there will be in \f(CW\*(C`$strap\->{max}\*(C'\fR, a list of which tests
are todo in \f(CW\*(C`$strap\->{todo}\*(C'\fR and if the whole test was skipped
\&\f(CW\*(C`$strap\->{skip_all}\*(C'\fR contains the reason.
.PP
.Vb 1
\&  my $is_bail_out = $strap\->_is_bail_out($line, \e$reason);
.Ve
.PP
Checks if the line is a \*(L"Bail out!\*(R".  Places the reason for bailing
(if any) in \f(CW$reason\fR.
.PP
.Vb 1
\&  $strap\->_reset_file_state;
.Ve
.PP
Resets things like \f(CW\*(C`$strap\->{max}\*(C'\fR , \f(CW\*(C`$strap\->{skip_all}\*(C'\fR,
etc. so it's ready to parse the next file.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
See \fIexamples/mini_harness.plx\fR for an example of use.
.SH "AUTHOR"
.IX Header "AUTHOR"
Michael G Schwern \f(CW\*(C`<schwern at pobox.com>\*(C'\fR, currently maintained by
Andy Lester \f(CW\*(C`<andy at petdance.com>\*(C'\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Test::Harness