note the purpose of a complex test

[imager.git] / t / t1000files.t

diff --git a/t/t1000files.t b/t/t1000files.t
index b0baac61c20a23c05b6a2b09dd46649d7781c9b3..10bbc4746a1738786eb93a5e351bcc2273c3c65c 100644 (file)
--- a/t/t1000files.t
+++ b/t/t1000files.t
@@ -4,7 +4,7 @@
 # the file format
 
 use strict;
-use Test::More tests => 35;
+use Test::More tests => 43;
 use Imager;
 
 -d "testout" or mkdir "testout";
@@ -13,6 +13,8 @@ Imager->open_log(log => "testout/t1000files.log");
 
 SKIP:
 {
+  # Test that i_test_format_probe() doesn't pollute stdout
+
   # Initally I tried to write this test using open to redirect files,
   # but there was a buffering problem that made it so the data wasn't
   # being written to the output file.  This external perl call avoids
@@ -67,6 +69,42 @@ ok(Imager->set_file_limits(reset=>1),
 is_deeply([ Imager->get_file_limits() ], [ 0, 0, 0 ],
          "check all are reset");
 
+# test error handling for loading file handers
+{
+  # first, no module at all
+  {
+    my $data = "abc";
+    ok(!Imager->new(data => $data, filetype => "unknown"),
+       "try to read an unknown file type");
+   like(Imager->errstr, qr(^format 'unknown' not supported - formats .* - Can't locate Imager/File/UNKNOWN.pm or Imager/File/UNKNOWNReader.pm$),
+       "check error message");
+  }
+  {
+    my $data;
+    my $im = Imager->new(xsize => 10, ysize => 10);
+    ok(!$im->write(data => \$data, type => "unknown"),
+       "try to write an unknown file type");
+   like($im->errstr, qr(^format 'unknown' not supported - formats .* - Can't locate Imager/File/UNKNOWN.pm or Imager/File/UNKNOWNWriter.pm$),
+       "check error message");
+  }
+  push @INC, "t/t1000lib";
+  {
+    my $data = "abc";
+    ok(!Imager->new(data => $data, filetype => "bad"),
+       "try to read an bad (other load failure) file type");
+   like(Imager->errstr, qr(^format 'bad' not supported - formats .* available for reading - This module fails to load$),
+       "check error message");
+  }
+  {
+    my $data;
+    my $im = Imager->new(xsize => 10, ysize => 10);
+    ok(!$im->write(data => \$data, type => "bad"),
+       "try to write an bad file type");
+   like($im->errstr, qr(^format 'bad' not supported - formats .* available for writing - This module fails to load$),
+       "check error message");
+  }
+}
+
 # check file type probe
 probe_ok("49492A41", undef, "not quite tiff");
 probe_ok("4D4D0041", undef, "not quite tiff");