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require "../spec_helper"
require "./spec_helper"
require "digest/crc32"
describe Digest::CRC32 do
it_acts_as_digest_algorithm Digest::CRC32
it "calculates digest from string" do
Digest::CRC32.digest("foo").to_slice.should eq Bytes[0x8c, 0x73, 0x65, 0x21]
end
it "calculates hash from string" do
Digest::CRC32.hexdigest("foo").should eq("8c736521")
end
it "calculates hash from unicode string" do
Digest::CRC32.hexdigest("fooø").should eq("d5f3a18b")
end
it "calculates hash from UInt8 slices" do
s = Bytes[0x66, 0x6f, 0x6f] # f,o,o
Digest::CRC32.hexdigest(s).should eq("8c736521")
end
it "calculates hash of #to_slice" do
buffer = StaticArray(UInt8, 1).new(1_u8)
Digest::CRC32.hexdigest(buffer).should eq("a505df1b")
end
it "can take a block" do
Digest::CRC32.hexdigest do |ctx|
ctx.update "f"
ctx.update Bytes[0x6f, 0x6f]
end.should eq("8c736521")
end
it "calculates base64'd hash from string" do
Digest::CRC32.base64digest("foo").should eq("jHNlIQ==")
end
it "resets" do
digest = Digest::CRC32.new
digest.update "foo"
digest.final.hexstring.should eq("8c736521")
digest.reset
digest.update "foo"
digest.final.hexstring.should eq("8c736521")
end
it "can't call final twice" do
digest = Digest::CRC32.new
digest.final
expect_raises(Digest::FinalizedError) do
digest.final
end
end
it "return the digest size" do
Digest::CRC32.new.digest_size.should eq 4
end
it "should be able to calculate crc32" do
crc = Digest::CRC32.checksum("foo").to_s(16)
crc.should eq("8c736521")
end
it "should be able to calculate crc32 combined" do
crc1 = Digest::CRC32.checksum("hello")
crc2 = Digest::CRC32.checksum(" world!")
combined = Digest::CRC32.combine(crc1, crc2, " world!".size)
Digest::CRC32.checksum("hello world!").should eq(combined)
end
end
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