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coverage.perl
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coverage.perl
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#!/usr/bin/perl -w
# $Id$
# Runs t/*.t with the custom Devel::Trace to check for source
# coverage.
use strict;
use lib qw( . .. ../mylib );
sub DEBUG () { 0 } # skip running tests to better debug this one
sub UNLINK () { 1 } # unlink coverage files when done (disable for testing)
sub SRC_COUNT () { 0 }
sub SRC_LINE () { 1 }
sub SRC_SRC () { 2 }
my (%counts, %uncalled);
# Find the tests.
use File::Find;
my @test_files;
sub wanted {
return unless -f;
return unless /\.t$/;
push @test_files, $File::Find::dir . "/" . $_;
}
my $test_directory =
( (-d './t')
? './t'
: ( (-d '../t')
? '../t'
: die "can't find the test directory at ./t or ../t"
)
);
find(\&wanted, $test_directory);
# -><- For testing, limit the report to a single file.
#@test_files = (
# "./t/01_sessions.t",
# "./t/03_aliases.t",
# "./t/04_selects.t",
#);
#@test_files = ( "./t/11_signals_poe.t", "./t/12_signals_ev.t" );
#@test_files = ( "./t/23_nfa.t" );
# Run each test with coverage statistics.
# Skip actual runs for testing.
if (DEBUG) {
warn "not running test programs";
goto SPANG;
}
foreach my $test_file (@test_files) {
unlink "$test_file.coverage";
$test_file =~ /\/(\d+)_/;
my $test_number = $1 + 0;
if (@ARGV) {
next unless grep /^0*$test_number$/, @ARGV;
}
print "*** Testing $test_file ...\n";
# System returns 0 on success.
my $result =
system( '/usr/bin/perl',
'-Imylib', '-I../mylib', '-I.', '-I..', '-d:Trace', $test_file
);
warn "error running $test_file: ($result) $!" if $result;
}
SPANG:
# Combine coverage statistics across all files.
foreach my $test_file (@test_files) {
my $results_file = $test_file . '.coverage';
unless (-f $results_file) {
warn "can't find expected file: $results_file";
next;
}
unless (open R, "<$results_file") {
warn "couldn't open $results_file for reading: $!";
next;
}
while (<R>) {
chomp;
my ($file, $line, $count, $sub, $source) = split /\t/;
$file =~ s/^lib\///;
my $report_source = $source;
$source =~ s/\s+/ /g;
$source =~ s/^\s+//;
$source =~ s/\s+$//;
# Ignore preprocessor BEGIN lines.
next if $source =~ /^BEGIN.*\#\s*include\s*$/;
# -><- Might be proper to ignore these things when outside any
# sub.
# Ignore constants.
next if $source =~ /^sub\s+\S+\s*\([^\)]*\)\s*\{.*?\};?(\s*\#.*?)?$/;
# Ignore the 1; line at the end of a module.
next if $source =~ /^\s*1\s*;\s*$/;
# Ignore C<use> lines, which often falsely appear as uninstrumented.
next if $source =~ /^use\s+/;
# Ignore $VERSION lines.
next if $source =~ /^\$VERSION\s*=\s*/;
# Ignore uninitialized lines. Sanity check them, too.
if ($source eq '(uninitialized)') {
die( "instrumented uninitialized line in sub $sub ",
"in $file at line $line\n"
)
if $count;
next;
}
# Count the initialized line.
if (exists $counts{$file}->{$sub}->{$source}) {
$counts{$file}->{$sub}->{$source}->[SRC_COUNT] += $count;
$counts{$file}->{$sub}->{$source}->[SRC_LINE] = $line
if $counts{$file}->{$sub}->{$source}->[SRC_LINE] < $line;
}
else {
$counts{$file}->{$sub}->{$source} = [ $count, $line, $report_source ];
}
}
close R;
if (UNLINK) {
unlink $results_file;
}
}
# Summary first.
open REPORT, '>coverage.report' or die "can't open coverage.report: $!";
print REPORT "***\n*** Coverage Summary\n***\n\n";
printf( REPORT
"%-35.35s = %5s / %5s = %7s\n",
'Source File', 'Ran', 'Total', 'Covered'
);
my $ueber_total = 0;
my $ueber_called = 0;
foreach my $file (sort keys %counts) {
next unless $file =~ /^POE.*\.pm$/;
my $file_total = 0;
my $file_called = 0;
my $subs = $counts{$file};
foreach my $sub (sort keys %$subs) {
my $sub_rec = $subs->{$sub};
foreach my $line_rec ( sort { $a->[SRC_LINE] <=> $b->[SRC_LINE] }
values %$sub_rec
) {
$file_total++;
if ($line_rec->[SRC_COUNT]) {
$file_called++;
}
else {
$uncalled{$file}->{$sub} = [ ] unless exists $uncalled{$file}->{$sub};
push @{$uncalled{$file}->{$sub}}, $line_rec;
}
}
}
$ueber_total += $file_total;
$ueber_called += $file_called;
# Division by 0 is generally frowned upon.
$file_total = 1 unless $file_total;
printf( REPORT
"%-35.35s = %5d / %5d = %6.2f%%\n",
$file, $file_called, $file_total, ($file_called / $file_total) * 100
);
}
# Division by 0 is generally frowned upon.
$ueber_total = 1 unless $ueber_total;
printf( REPORT
"%-35.35s = %5d / %5d = %6.2f%%\n", 'All Told',
$ueber_called, $ueber_total, ($ueber_called / $ueber_total) * 100
);
# Now detail.
foreach my $file (sort keys %uncalled) {
foreach my $sub (sort keys %{$uncalled{$file}}) {
print REPORT "\n*** Uninstrumented lines in $file sub $sub:\n\n";
my $sub_rec = $uncalled{$file}->{$sub};
foreach my $line (@$sub_rec) {
printf REPORT "%5d : %-70.70s\n", $line->[SRC_LINE], $line->[SRC_SRC];
}
}
}
close REPORT;
print "\nA coverage report has been written to coverage.report.\n";
exit;