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https://issues.apache.org/jira/browse/COUCHDB-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15972433#comment-15972433
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salamani commented on COUCHDB-3261:
-----------------------------------
Hi John,
This is not a real issue with Snappy since snappy compression is meant to
behave differently based on the architecture. We see similar behavior from
other open source package.
So here we will need special casing. Please find attached patch which compares
different compress values for z systems. Let us know your comments.
Thanks,
salamani
> Test case couch_compress_tests failed
> -------------------------------------
>
> Key: COUCHDB-3261
> URL: https://issues.apache.org/jira/browse/COUCHDB-3261
> Project: CouchDB
> Issue Type: Bug
> Components: Test Suite
> Reporter: salamani
> Labels: test
> Attachments: couch_compress_tests.patch
>
>
> CouchDB : 2.0.0
> I have built the CouchDB source for version 2.0.0.
> Test case log of couch_compress_tests:
> module 'couch_compress_tests'
> couch_compress_tests:33: compress_test_...ok
> couch_compress_tests:34: compress_test_...ok
> couch_compress_tests:35: compress_test_...*failed*
> in function couch_compress_tests:'-compress_test_/0-fun-4-'/0
> (test/couch_compress_tests.erl, line 35)
> **error:{assertEqual,[{module,couch_compress_tests},
> {line,35},
> {expression,"couch_compress : compress ( ? TERM , snappy )"},
> {expected,<<1,49,64,131,104,1,108,0,0,0,5,...>>},
> {value,<<1,49,60,131,104,1,108,0,0,0,...>>}]}
> output:<<"">>
> couch_compress_tests:40: decompress_test_...ok
> couch_compress_tests:41: decompress_test_...ok
> couch_compress_tests:42: decompress_test_...ok
> couch_compress_tests:43: decompress_test_...ok
> couch_compress_tests:48: recompress_test_...ok
> couch_compress_tests:49: recompress_test_...*failed*
> in function couch_compress_tests:'-recompress_test_/0-fun-2-'/0
> (test/couch_compress_tests.erl, line 49)
> **error:{assertEqual,[{module,couch_compress_tests},
> {line,49},
> {expression,"couch_compress : compress ( ? NONE , snappy )"},
> {expected,<<1,49,64,131,104,1,108,0,0,0,5,...>>},
> {value,<<1,49,60,131,104,1,108,0,0,0,...>>}]}
> output:<<"">>
> couch_compress_tests:50: recompress_test_...ok
> couch_compress_tests:51: recompress_test_...*failed*
> in function couch_compress_tests:'-recompress_test_/0-fun-6-'/0
> (test/couch_compress_tests.erl, line 51)
> **error:{assertEqual,[{module,couch_compress_tests},
> {line,51},
> {expression,"couch_compress : compress ( ? DEFLATE , snappy )"},
> {expected,<<1,49,64,131,104,1,108,0,0,0,5,...>>},
> {value,<<1,49,60,131,104,1,108,0,0,0,...>>}]}
> output:<<"">>
> couch_compress_tests:52: recompress_test_...ok
> couch_compress_tests:53: recompress_test_...ok
> couch_compress_tests:58: is_compressed_test_...ok
> couch_compress_tests:59: is_compressed_test_...ok
> couch_compress_tests:60: is_compressed_test_...ok
> couch_compress_tests:61: is_compressed_test_...ok
> couch_compress_tests:62: is_compressed_test_...ok
> couch_compress_tests:63: is_compressed_test_...ok
> couch_compress_tests:64: is_compressed_test_...ok
> couch_compress_tests:65: is_compressed_test_...ok
> couch_compress_tests:66: is_compressed_test_...ok
> couch_compress_tests:67: is_compressed_test_...ok
> couch_compress_tests:68: is_compressed_test_...ok
> couch_compress_tests:70: is_compressed_test_...ok
> couch_compress_tests:72: is_compressed_test_...ok
> [done in 0.078 s]
> [done in 0.078 s]
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