46 lines
1.5 KiB
Ruby
46 lines
1.5 KiB
Ruby
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require 'test_helper'
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require 'fileutils'
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class CommandLineTest < Test::Unit::TestCase
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def test_class_crc_table
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assert_equal 256, Compass::PNG::CRC_TABLE.length
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{0 => 0, 1 => 1996959894, 22 => 4107580753, 133 => 2647816111, 255 => 755167117}.each do |i, crc|
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assert_equal crc, Compass::PNG::CRC_TABLE[i]
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end
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end
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def test_class_crc
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assert_equal 2666930069, Compass::PNG.crc('foobar')
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assert_equal 2035837995, Compass::PNG.crc('A721dasdN')
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end
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def test_class_chunk
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chunk = Compass::PNG.chunk 'IHDR', [10, 10, 8, 6, 0, 0, 0 ].pack('N2C5')
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header_crc = "\2152\317\275"
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header_data = "\000\000\000\n\000\000\000\n\b\006\000\000\000"
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header_length = "\000\000\000\r"
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header_chunk = "#{header_length}IHDR#{header_data}#{header_crc}"
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assert_equal header_chunk, chunk
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end
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def test_class_chunk_empty
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chunk = Compass::PNG.chunk 'IHDR'
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expected = "#{0.chr * 4}IHDR#{[Compass::PNG.crc("IHDR")].pack 'N'}"
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assert_equal expected, chunk
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end
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def test_to_blob
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png = Compass::PNG.new(5,10, [255,255,255])
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blob = 'iVBORw0KGgoAAAANSUhEUgAAAAUAAAAKCAIAAADzWwNnAAAAD0lEQVR4nGP4jwoYBhkfALRylWv4Dj0LAAAAAElFTkSuQmCC'.unpack('m*').first
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assert_equal blob, png.to_blob
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png = Compass::PNG.new(10,5, [32,64,128])
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blob = 'iVBORw0KGgoAAAANSUhEUgAAAAoAAAAFCAIAAADzBuo/AAAAEUlEQVR4nGNQcGjAgxgGUBoALT4rwRTA0gkAAAAASUVORK5CYII='.unpack('m*').first
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assert_equal blob, png.to_blob
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end
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end
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