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RSpec.describe Magick::Image, "#blur_channel" do
it "works" do
image = described_class.new(20, 20)
expect { image.blur_channel }.not_to raise_error
expect { image.blur_channel(1) }.not_to raise_error
expect { image.blur_channel(1, 2) }.not_to raise_error
expect { image.blur_channel(1, 2, Magick::RedChannel) }.not_to raise_error
expect { image.blur_channel(1, 2, Magick::RedChannel, Magick::BlueChannel, Magick::GreenChannel, Magick::OpacityChannel) }.not_to raise_error
expect { image.blur_channel(1, 2, Magick::CyanChannel, Magick::MagentaChannel, Magick::YellowChannel, Magick::BlackChannel) }.not_to raise_error
expect { image.blur_channel(1, 2, Magick::GrayChannel) }.not_to raise_error
expect { image.blur_channel(1, 2, Magick::AllChannels) }.not_to raise_error
expect { image.blur_channel(1, 2, 2) }.to raise_error(TypeError)
result = image.blur_channel
expect(result).to be_instance_of(described_class)
end
end
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