Test for more than one type of whitespace character in aws_checksum_u…

…tils_spec.rb

spec/atc/utils/aws_checksum_utils_spec.rb

@@ -28,13 +28,13 @@
     end
 
     # NOTE: We ran into this issue in the past, so that's why this test exists
-    it 'properly handles chunks that are made entirely of line tabulation (0x0B) elements' do
+    it 'properly handles parts that are made entirely of whitespace characters (0x0B line tab, 0x0C form feed, etc.)' do
       Tempfile.create('example-file-to-checksum') do |f|
         f.write('A' * multipart_threshold)
-        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * multipart_threshold)
-        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * multipart_threshold)
+        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * (multipart_threshold - 10))
+        f.write(Atc::Utils::HexUtils.hex_to_bin('0C') * 10)
         f.write('A' * multipart_threshold)
-        expect(described_class.checksum_string_for_file(f.path, multipart_threshold)).to eq('YjA5PQ==-4')
+        expect(described_class.checksum_string_for_file(f.path, multipart_threshold)).to eq('OdsyWA==-3')
       end
     end
   end
@@ -45,18 +45,18 @@
     let(:part_size) { 5.megabytes }
 
     # NOTE: We ran into this issue in the past, so that's why this test exists
-    it 'properly handles chunks that are made entirely of line tabulation (0x0B) elements' do
+    it 'properly handles parts that are made entirely of whitespace characters (0x0B line tab, 0x0C form feed, etc.)' do
       Tempfile.create('example-file-to-checksum') do |f|
         f.write('A' * part_size)
-        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * part_size)
-        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * part_size)
+        f.write(Atc::Utils::HexUtils.hex_to_bin('0B') * (part_size - 10))
+        f.write(Atc::Utils::HexUtils.hex_to_bin('0C') * 10)
         f.write('A' * part_size)
         described_class.digest_file(f.path, part_size, crc32c_accumulator, whole_object_digester)
       end
       expect(
         crc32c_accumulator.map { |checksum_bin_value| Base64.strict_encode64(checksum_bin_value) }
-      ).to eq(['MDaLrw==', '6TPWQg==', '6TPWQg==', 'MDaLrw=='])
-      expect(whole_object_digester.base64digest).to eq('vobXrQ==')
+      ).to eq(['MDaLrw==', 'X/yhqA==', 'MDaLrw=='])
+      expect(whole_object_digester.base64digest).to eq('NIRe3g==')
     end
   end