Fixed test for PNG generation.
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@ -4,6 +4,7 @@ use File::Temp qw(tempfile);
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use Time::Local;
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use Data::Dumper;
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$VERSION = do { my @r=(q$Revision: 1.3 $=~/\d+/g);sprintf "%d."."%02d"x$#r,@r};
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sub new {
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my ($class, %opts) = @_;
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@ -35,7 +35,7 @@ $ts->add(1.002E9, 3);
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$test = 3;
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my $g = $ts->plot();
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print STDERR "length \$g = ", length($g), "\n";
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if (length($g) > 0 && substr($g, 0, 3) eq "PNG") {
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if (length($g) > 0 && substr($g, 0, 4) eq "\211PNG") {
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print "ok $test\n";
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} else {
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print "not ok $test\n";
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