Test suite fails

[strzibny]

Hi, I am about to package sprite-factory for fedora, but I am getting a few errors during the build:

+ ruby -rminitest/autorun -rrubygems -Ilib:test -
MiniTest::Unit::TestCase is now Minitest::Test. From /builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/test_case.rb:5:in `<module:SpriteFactory>'
MiniTest::Unit::TestCase is now Minitest::Test. From /builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/library_test.rb:3:in `<top (required)>'
MiniTest::Unit::TestCase is now Minitest::Test. From /builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/integration_test.rb:4:in `<module:SpriteFactory>'
MiniTest::Unit::TestCase is now Minitest::Test. From /builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/style_test.rb:4:in `<module:SpriteFactory>'
MiniTest::Unit::TestCase is now Minitest::Test. From /builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/runner_test.rb:4:in `<module:SpriteFactory>'
Run options: --seed 53921
# Running:
.......FFwhich: no pngcrush in (/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin:/builddir/.local/bin:/builddir/bin)
............................F.....
Finished in 1.929278s, 22.2881 runs/s, 109.3674 assertions/s.
  1) Failure:
SpriteFactory::LibraryTest#test_load_irregular_using_image_magick [/builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/library_test.rb:22]:
 - unexpected width at index 0.
Expected: 60
  Actual: 0
  2) Failure:
SpriteFactory::LibraryTest#test_create_using_chunkypng [/builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/library_test.rb:37]:
generated image does not match pregenerated reference:
 actual:   test/images/regular.horizontal.png
 expected: test/images/reference/regular.horizontal.png.
Expected: 0.0
  Actual: 3.2189052864267654e-20
  3) Failure:
SpriteFactory::RunnerTest#test_invalid_config [/builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/runner_test.rb:133]:
[RuntimeError] exception expected, not
Class: <LocalJumpError>
Message: <"no block given (yield)">
---Backtrace---
-:11:in `assert_raise'
/builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/test_case.rb:81:in `assert_runtime_error'
/builddir/build/BUILD/sprite-factory-1.6.0/usr/share/gems/gems/sprite-factory-1.6.0/test/runner_test.rb:133:in `test_invalid_config'
---------------
43 runs, 211 assertions, 3 failures, 0 errors, 0 skips

Note that we have minitest5 in Fedora so I run the test suite as:

# To run the test suite against minitest 5
ruby -rminitest/autorun -rrubygems -Ilib:test - << \EOF
  module Kernel
    alias orig_require require
    remove_method :require

    def require path
      orig_require path unless path == 'test/unit'
    end
  end
  module MiniTest::Assertions
    def assert_raise(*exp)
      assert_raises(*exp)
    end
  end
  Test = Minitest
  Dir.glob "./test/*_test.rb", &method(:require)
EOF