Fix and add test for empty chain and reorg consistency for gettxoutsetinfo. #10445

pull gmaxwell wants to merge 2 commits into bitcoin:master from gmaxwell:test_more_gettxoutset changing 2 files +30 −2
  1. gmaxwell commented at 10:11 pm on May 23, 2017: contributor
  2. gmaxwell commented at 10:11 pm on May 23, 2017: contributor
    This will crash on master. Fix is currently in the per-txout PR. Edit: Sipa asked me to just add the fix here, doing so now.
  3. Fix: make CCoinsViewDbCursor::Seek work for missing keys 
    Thanks to Suhas Daftuar for figuring this out.
    822755a424
  4. fanquake added the label Tests on May 23, 2017
  5. sipa commented at 1:55 am on May 24, 2017: member
    utACK 4b3dd975a303a0d7efaec790c387f0285a4bb8c4
  6. jonasschnelli approved
  7. jonasschnelli commented at 6:29 am on May 24, 2017: contributor
    utACK 4b3dd975a303a0d7efaec790c387f0285a4bb8c4
  8. paveljanik commented at 6:52 am on May 24, 2017: contributor

    ACK https://github.com/bitcoin/bitcoin/commit/4b3dd975a303a0d7efaec790c387f0285a4bb8c4

    FWIW: The new test crashes on master with:

    02017-05-24 06:50:24.034000 TestFramework (INFO): Initializing test directory /var/folders/65/fn0h49r55k7779vg1b_h461r0000gn/T/test0wr7ofxj
1Assertion failed: (valid_), function key, file leveldb/db/db_iter.cc, line 67.

    Fixed in this PR.

  9. in test/functional/blockchain.py:58 in 4b3dd975a3 outdated 
    52@@ -53,6 +53,25 @@ def _test_gettxoutsetinfo(self):
53         assert_equal(len(res['bestblock']), 64)
54         assert_equal(len(res['hash_serialized']), 64)
55 
56+        b1hash = node.getblockhash(1)
    jnewbery commented at 3:52 pm on May 24, 2017:

    Can you add a comment (or info log) here explaining what this test is for:

    0self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
    gmaxwell commented at 9:10 am on May 25, 2017:
    done
  10. in test/functional/blockchain.py:65 in 4b3dd975a3 outdated 
    58+
59+        res2 = node.gettxoutsetinfo()
60+        assert_equal(res2['transactions'], 0)
61+        assert_equal(res2['total_amount'], Decimal('0'))
62+        assert_equal(res2['height'], 0)
63+        assert_equal(res2['txouts'], 0)
    jnewbery commented at 3:54 pm on May 24, 2017:

    Why not test all fields:

    0assert_equal(res2['bestblock'], node.getblockhash(0)))
1assert_equal(len(res2['hash_serialized']), 64)
    gmaxwell commented at 9:10 am on May 25, 2017:
    done (and also added that to the first check)
  11. in test/functional/blockchain.py:71 in 4b3dd975a3 outdated 
    61+        assert_equal(res2['total_amount'], Decimal('0'))
62+        assert_equal(res2['height'], 0)
63+        assert_equal(res2['txouts'], 0)
64+
65+        node.reconsiderblock(b1hash)
66+
    jnewbery commented at 3:54 pm on May 24, 2017:

    Again, a comment/info log would be nice here:

    0self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
    gmaxwell commented at 9:10 am on May 25, 2017:
    done
  12. in test/functional/blockchain.py:73 in 4b3dd975a3 outdated 
    63+        assert_equal(res2['txouts'], 0)
64+
65+        node.reconsiderblock(b1hash)
66+
67+        res3 = node.gettxoutsetinfo()
68+        assert_equal(res['total_amount'], res3['total_amount'])
    jnewbery commented at 3:56 pm on May 24, 2017:

    Consider just testing equality of res and res3 for succinctness:

    0assert_equal(res, res3)
    gmaxwell commented at 1:28 am on May 25, 2017:
    Equality will be the wrong comparison with the disk usage field which is about to be added.
  13. jnewbery commented at 4:01 pm on May 24, 2017: member

    I can’t review the code change in src/txdb.cpp since I don’t know that code, but I can confirm that this test causes bitcoind to crash without the code change, and passes successfully with the code change.

    A few nits inline. Also consider changing line 35 of the test from:

    0        self.num_nodes = 2

    to:

    0        self.num_nodes = 1

    I know that wsan’t changed by this PR, but 2 nodes are unnecessary for this test, and changing it to 1 cuts the test time in half (from 5s to 2.5s on my pc) due to node startup/shutdown time.

  14. sdaftuar commented at 4:06 pm on May 24, 2017: member
    ACK
  15. Add test for empty chain and reorg consistency for gettxoutsetinfo. 513da90cdd
  16. gmaxwell commented at 9:11 am on May 25, 2017: contributor
    updated for @jnewbery ’s nits. (Thanks!)
  18. sdaftuar commented at 6:44 pm on May 25, 2017: member
    utACK 513da90
  19. paveljanik commented at 9:31 am on May 26, 2017: contributor
    reACK 513da90
  20. sipa merged this on May 26, 2017
  21. sipa closed this on May 26, 2017
  22. sipa referenced this in commit b4b057a3e0 on May 26, 2017
  23. gmaxwell renamed this:
    Add test for empty chain and reorg consistency for gettxoutsetinfo.
    Fix and add test for empty chain and reorg consistency for gettxoutsetinfo.
    on Jun 1, 2017
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gmaxwell sipa jonasschnelli paveljanik jnewbery sdaftuar

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