ldb_test.py

#!/usr/bin/env python3
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
from __future__ import absolute_import, division, print_function, unicode_literals

import glob

import os
import os.path
import re
import shutil
import subprocess
import tempfile
import time
import unittest


def my_check_output(*popenargs, **kwargs):
    """
    If we had python 2.7, we should simply use subprocess.check_output.
    This is a stop-gap solution for python 2.6
    """
    if "stdout" in kwargs:
        raise ValueError("stdout argument not allowed, it will be overridden.")
    process = subprocess.Popen(
        stderr=subprocess.PIPE, stdout=subprocess.PIPE, *popenargs, **kwargs
    )
    output, unused_err = process.communicate()
    retcode = process.poll()
    if retcode:
        cmd = kwargs.get("args")
        if cmd is None:
            cmd = popenargs[0]
        raise Exception("Exit code is not 0.  It is %d.  Command: %s" % (retcode, cmd))
    return output.decode("utf-8")


def run_err_null(cmd):
    return os.system(cmd + " 2>/dev/null ")


class LDBTestCase(unittest.TestCase):
    def setUp(self):
        self.TMP_DIR = tempfile.mkdtemp(prefix="ldb_test_")
        self.DB_NAME = "testdb"

    def tearDown(self):
        assert (
            self.TMP_DIR.strip() != "/"
            and self.TMP_DIR.strip() != "/tmp"
            and self.TMP_DIR.strip() != "/tmp/"
        )  # Just some paranoia

        shutil.rmtree(self.TMP_DIR)

    def dbParam(self, dbName):
        return "--db=%s" % os.path.join(self.TMP_DIR, dbName)

    def assertRunOKFull(
        self, params, expectedOutput, unexpected=False, isPattern=False
    ):
        """
        All command-line params must be specified.
        Allows full flexibility in testing; for example: missing db param.
        """
        output = my_check_output(
            './ldb %s |grep -v "Created bg thread"' % params, shell=True
        )
        if not unexpected:
            if isPattern:
                self.assertNotEqual(expectedOutput.search(output.strip()), None)
            else:
                self.assertEqual(output.strip(), expectedOutput.strip())
        else:
            if isPattern:
                self.assertEqual(expectedOutput.search(output.strip()), None)
            else:
                self.assertNotEqual(output.strip(), expectedOutput.strip())

    def assertRunFAILFull(self, params):
        """
        All command-line params must be specified.
        Allows full flexibility in testing; for example: missing db param.
        """
        try:

            my_check_output(
                './ldb %s >/dev/null 2>&1 |grep -v "Created bg \
                thread"'
                % params,
                shell=True,
            )
        except Exception:
            return
        self.fail(
            "Exception should have been raised for command with params: %s" % params
        )

    def assertRunOK(self, params, expectedOutput, unexpected=False):
        """
        Uses the default test db.
        """
        self.assertRunOKFull(
            "%s %s" % (self.dbParam(self.DB_NAME), params), expectedOutput, unexpected
        )

    def assertRunFAIL(self, params):
        """
        Uses the default test db.
        """
        self.assertRunFAILFull("%s %s" % (self.dbParam(self.DB_NAME), params))

    def testSimpleStringPutGet(self):
        print("Running testSimpleStringPutGet...")
        self.assertRunFAIL("put x1 y1")
        self.assertRunOK("put --create_if_missing x1 y1", "OK")
        self.assertRunOK("get x1", "y1")
        self.assertRunFAIL("get x2")

        self.assertRunOK("put x2 y2", "OK")
        self.assertRunOK("get x1", "y1")
        self.assertRunOK("get x2", "y2")
        self.assertRunFAIL("get x3")

        self.assertRunOK("scan --from=x1 --to=z", "x1 : y1\nx2 : y2")
        self.assertRunOK("put x3 y3", "OK")

        self.assertRunOK("scan --from=x1 --to=z", "x1 : y1\nx2 : y2\nx3 : y3")
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3")
        self.assertRunOK("scan --from=x", "x1 : y1\nx2 : y2\nx3 : y3")

        self.assertRunOK("scan --to=x2", "x1 : y1")
        self.assertRunOK("scan --from=x1 --to=z --max_keys=1", "x1 : y1")
        self.assertRunOK("scan --from=x1 --to=z --max_keys=2", "x1 : y1\nx2 : y2")

        self.assertRunOK(
            "scan --from=x1 --to=z --max_keys=3", "x1 : y1\nx2 : y2\nx3 : y3"
        )
        self.assertRunOK(
            "scan --from=x1 --to=z --max_keys=4", "x1 : y1\nx2 : y2\nx3 : y3"
        )
        self.assertRunOK("scan --from=x1 --to=x2", "x1 : y1")
        self.assertRunOK("scan --from=x2 --to=x4", "x2 : y2\nx3 : y3")
        self.assertRunFAIL("scan --from=x4 --to=z")  # No results => FAIL
        self.assertRunFAIL("scan --from=x1 --to=z --max_keys=foo")

        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3")

        self.assertRunOK("delete x1", "OK")
        self.assertRunOK("scan", "x2 : y2\nx3 : y3")

        self.assertRunOK("delete NonExistentKey", "OK")
        # It is weird that GET and SCAN raise exception for
        # non-existent key, while delete does not

        self.assertRunOK("checkconsistency", "OK")

    def dumpDb(self, params, dumpFile):
        return 0 == run_err_null("./ldb dump %s > %s" % (params, dumpFile))

    def loadDb(self, params, dumpFile):
        return 0 == run_err_null("cat %s | ./ldb load %s" % (dumpFile, params))

    def writeExternSst(self, params, inputDumpFile, outputSst):
        return 0 == run_err_null(
            "cat %s | ./ldb write_extern_sst %s %s" % (inputDumpFile, outputSst, params)
        )

    def ingestExternSst(self, params, inputSst):
        return 0 == run_err_null("./ldb ingest_extern_sst %s %s" % (inputSst, params))

    def testStringBatchPut(self):
        print("Running testStringBatchPut...")
        self.assertRunOK("batchput x1 y1 --create_if_missing", "OK")
        self.assertRunOK("scan", "x1 : y1")
        self.assertRunOK('batchput x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK")
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 abc : y4 xyz")
        self.assertRunFAIL("batchput")
        self.assertRunFAIL("batchput k1")
        self.assertRunFAIL("batchput k1 v1 k2")

    def testBlobBatchPut(self):
        print("Running testBlobBatchPut...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("batchput x1 y1 --create_if_missing --enable_blob_files", "OK")
        self.assertRunOK("scan", "x1 : y1")
        self.assertRunOK(
            'batchput --enable_blob_files x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK"
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 abc : y4 xyz")

        blob_files = self.getBlobFiles(dbPath)
        self.assertTrue(len(blob_files) >= 1)

    def testBlobPut(self):
        print("Running testBlobPut...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put --create_if_missing --enable_blob_files x1 y1", "OK")
        self.assertRunOK("get x1", "y1")
        self.assertRunOK("put --enable_blob_files x2 y2", "OK")
        self.assertRunOK("get x1", "y1")
        self.assertRunOK("get x2", "y2")
        self.assertRunFAIL("get x3")

        blob_files = self.getBlobFiles(dbPath)
        self.assertTrue(len(blob_files) >= 1)

    def testBlobStartingLevel(self):
        print("Running testBlobStartingLevel...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK(
            "put --create_if_missing --enable_blob_files --blob_file_starting_level=10 x1 y1",
            "OK",
        )
        self.assertRunOK("get x1", "y1")

        blob_files = self.getBlobFiles(dbPath)
        self.assertTrue(len(blob_files) == 0)

        self.assertRunOK(
            "put --enable_blob_files --blob_file_starting_level=0 x2 y2", "OK"
        )
        self.assertRunOK("get x1", "y1")
        self.assertRunOK("get x2", "y2")
        self.assertRunFAIL("get x3")

        blob_files = self.getBlobFiles(dbPath)
        self.assertTrue(len(blob_files) >= 1)

    def testCountDelimDump(self):
        print("Running testCountDelimDump...")
        self.assertRunOK("batchput x.1 x1 --create_if_missing", "OK")
        self.assertRunOK("batchput y.abc abc y.2 2 z.13c pqr", "OK")
        self.assertRunOK(
            "dump --count_delim",
            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
        )
        self.assertRunOK(
            'dump --count_delim="."',
            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
        )
        self.assertRunOK("batchput x,2 x2 x,abc xabc", "OK")
        self.assertRunOK(
            'dump --count_delim=","',
            "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8",
        )

    def testCountDelimIDump(self):
        print("Running testCountDelimIDump...")
        self.assertRunOK("batchput x.1 x1 --create_if_missing", "OK")
        self.assertRunOK("batchput y.abc abc y.2 2 z.13c pqr", "OK")
        self.assertRunOK(
            "idump --count_delim",
            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
        )
        self.assertRunOK(
            'idump --count_delim="."',
            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
        )
        self.assertRunOK("batchput x,2 x2 x,abc xabc", "OK")
        self.assertRunOK(
            'idump --count_delim=","',
            "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8",
        )

    def testInvalidCmdLines(self):
        print("Running testInvalidCmdLines...")
        # db not specified
        self.assertRunFAILFull("put 0x6133 0x6233 --hex --create_if_missing")
        # No param called he
        self.assertRunFAIL("put 0x6133 0x6233 --he --create_if_missing")
        # max_keys is not applicable for put
        self.assertRunFAIL("put 0x6133 0x6233 --max_keys=1 --create_if_missing")
        # hex has invalid boolean value

    def testHexPutGet(self):
        print("Running testHexPutGet...")
        self.assertRunOK("put a1 b1 --create_if_missing", "OK")
        self.assertRunOK("scan", "a1 : b1")
        self.assertRunOK("scan --hex", "0x6131 : 0x6231")
        self.assertRunFAIL("put --hex 6132 6232")
        self.assertRunOK("put --hex 0x6132 0x6232", "OK")
        self.assertRunOK("scan --hex", "0x6131 : 0x6231\n0x6132 : 0x6232")
        self.assertRunOK("scan", "a1 : b1\na2 : b2")
        self.assertRunOK("get a1", "b1")
        self.assertRunOK("get --hex 0x6131", "0x6231")
        self.assertRunOK("get a2", "b2")
        self.assertRunOK("get --hex 0x6132", "0x6232")
        self.assertRunOK("get --key_hex 0x6132", "b2")
        self.assertRunOK("get --key_hex --value_hex 0x6132", "0x6232")
        self.assertRunOK("get --value_hex a2", "0x6232")
        self.assertRunOK(
            "scan --key_hex --value_hex", "0x6131 : 0x6231\n0x6132 : 0x6232"
        )
        self.assertRunOK(
            "scan --hex --from=0x6131 --to=0x6133", "0x6131 : 0x6231\n0x6132 : 0x6232"
        )
        self.assertRunOK("scan --hex --from=0x6131 --to=0x6132", "0x6131 : 0x6231")
        self.assertRunOK("scan --key_hex", "0x6131 : b1\n0x6132 : b2")
        self.assertRunOK("scan --value_hex", "a1 : 0x6231\na2 : 0x6232")
        self.assertRunOK("batchput --hex 0x6133 0x6233 0x6134 0x6234", "OK")
        self.assertRunOK("scan", "a1 : b1\na2 : b2\na3 : b3\na4 : b4")
        self.assertRunOK("delete --hex 0x6133", "OK")
        self.assertRunOK("scan", "a1 : b1\na2 : b2\na4 : b4")
        self.assertRunOK("checkconsistency", "OK")

    def testTtlPutGet(self):
        print("Running testTtlPutGet...")
        self.assertRunOK("put a1 b1 --ttl --create_if_missing", "OK")
        self.assertRunOK("scan --hex", "0x6131 : 0x6231", True)
        self.assertRunOK("dump --ttl ", "a1 ==> b1", True)
        self.assertRunOK("dump --hex --ttl ", "0x6131 ==> 0x6231\nKeys in range: 1")
        self.assertRunOK("scan --hex --ttl", "0x6131 : 0x6231")
        self.assertRunOK("get --value_hex a1", "0x6231", True)
        self.assertRunOK("get --ttl a1", "b1")
        self.assertRunOK("put a3 b3 --create_if_missing", "OK")
        # fails because timstamp's length is greater than value's
        self.assertRunFAIL("get --ttl a3")
        self.assertRunOK("checkconsistency", "OK")

    def testInvalidCmdLines(self):  # noqa: F811 T25377293 Grandfathered in
        print("Running testInvalidCmdLines...")
        # db not specified
        self.assertRunFAILFull("put 0x6133 0x6233 --hex --create_if_missing")
        # No param called he
        self.assertRunFAIL("put 0x6133 0x6233 --he --create_if_missing")
        # max_keys is not applicable for put
        self.assertRunFAIL("put 0x6133 0x6233 --max_keys=1 --create_if_missing")
        # hex has invalid boolean value
        self.assertRunFAIL("put 0x6133 0x6233 --hex=Boo --create_if_missing")

    def testDumpLoad(self):
        print("Running testDumpLoad...")
        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4", "OK")
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
        origDbPath = os.path.join(self.TMP_DIR, self.DB_NAME)

        # Dump and load without any additional params specified
        dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump1")
        self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
        self.assertTrue(
            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
        )
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )

        # Dump and load in hex
        dumpFilePath = os.path.join(self.TMP_DIR, "dump2")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump2")
        self.assertTrue(self.dumpDb("--db=%s --hex" % origDbPath, dumpFilePath))
        self.assertTrue(
            self.loadDb(
                "--db=%s --hex --create_if_missing" % loadedDbPath, dumpFilePath
            )
        )
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )

        # Dump only a portion of the key range
        dumpFilePath = os.path.join(self.TMP_DIR, "dump3")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump3")
        self.assertTrue(
            self.dumpDb("--db=%s --from=x1 --to=x3" % origDbPath, dumpFilePath)
        )
        self.assertTrue(
            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
        )
        self.assertRunOKFull("scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2")

        # Dump upto max_keys rows
        dumpFilePath = os.path.join(self.TMP_DIR, "dump4")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump4")
        self.assertTrue(self.dumpDb("--db=%s --max_keys=3" % origDbPath, dumpFilePath))
        self.assertTrue(
            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
        )
        self.assertRunOKFull("scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3")

        # Load into an existing db, create_if_missing is not specified
        self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
        self.assertTrue(self.loadDb("--db=%s" % loadedDbPath, dumpFilePath))
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )

        # Dump and load with WAL disabled
        dumpFilePath = os.path.join(self.TMP_DIR, "dump5")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump5")
        self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
        self.assertTrue(
            self.loadDb(
                "--db=%s --disable_wal --create_if_missing" % loadedDbPath, dumpFilePath
            )
        )
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )

        # Dump and load with lots of extra params specified
        extraParams = " ".join(
            [
                "--bloom_bits=14",
                "--block_size=1024",
                "--auto_compaction=true",
                "--write_buffer_size=4194304",
                "--file_size=2097152",
            ]
        )
        dumpFilePath = os.path.join(self.TMP_DIR, "dump6")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump6")
        self.assertTrue(
            self.dumpDb("--db=%s %s" % (origDbPath, extraParams), dumpFilePath)
        )
        self.assertTrue(
            self.loadDb(
                "--db=%s %s --create_if_missing" % (loadedDbPath, extraParams),
                dumpFilePath,
            )
        )
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )

        # Dump with count_only
        dumpFilePath = os.path.join(self.TMP_DIR, "dump7")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump7")
        self.assertTrue(self.dumpDb("--db=%s --count_only" % origDbPath, dumpFilePath))
        self.assertTrue(
            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
        )
        # DB should have atleast one value for scan to work
        self.assertRunOKFull("put --db=%s k1 v1" % loadedDbPath, "OK")
        self.assertRunOKFull("scan --db=%s" % loadedDbPath, "k1 : v1")

        # Dump command fails because of typo in params
        dumpFilePath = os.path.join(self.TMP_DIR, "dump8")
        self.assertFalse(
            self.dumpDb("--db=%s --create_if_missing" % origDbPath, dumpFilePath)
        )

        # Dump and load with BlobDB enabled
        blobParams = " ".join(
            ["--enable_blob_files", "--min_blob_size=1", "--blob_file_size=2097152"]
        )
        dumpFilePath = os.path.join(self.TMP_DIR, "dump9")
        loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump9")
        self.assertTrue(self.dumpDb("--db=%s" % (origDbPath), dumpFilePath))
        self.assertTrue(
            self.loadDb(
                "--db=%s %s --create_if_missing --disable_wal"
                % (loadedDbPath, blobParams),
                dumpFilePath,
            )
        )
        self.assertRunOKFull(
            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
        )
        blob_files = self.getBlobFiles(loadedDbPath)
        self.assertTrue(len(blob_files) >= 1)

    def testIDumpBasics(self):
        print("Running testIDumpBasics...")
        self.assertRunOK("put a val --create_if_missing", "OK")
        self.assertRunOK("put b val", "OK")
        self.assertRunOK(
            "idump",
            "'a' seq:1, type:1 => val\n"
            "'b' seq:2, type:1 => val\nInternal keys in range: 2",
        )
        self.assertRunOK(
            "idump --input_key_hex --from=%s --to=%s" % (hex(ord("a")), hex(ord("b"))),
            "'a' seq:1, type:1 => val\nInternal keys in range: 1",
        )

    def testIDumpDecodeBlobIndex(self):
        print("Running testIDumpDecodeBlobIndex...")
        self.assertRunOK("put a val --create_if_missing", "OK")
        self.assertRunOK("put b val --enable_blob_files", "OK")

        # Pattern to expect from dump with decode_blob_index flag enabled.
        regex = ".*\[blob ref\].*"
        expected_pattern = re.compile(regex)
        cmd = "idump %s --decode_blob_index"
        self.assertRunOKFull(
            (cmd) % (self.dbParam(self.DB_NAME)),
            expected_pattern,
            unexpected=False,
            isPattern=True,
        )

    def testMiscAdminTask(self):
        print("Running testMiscAdminTask...")
        # These tests need to be improved; for example with asserts about
        # whether compaction or level reduction actually took place.
        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4", "OK")
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
        origDbPath = os.path.join(self.TMP_DIR, self.DB_NAME)

        self.assertTrue(0 == run_err_null("./ldb compact --db=%s" % origDbPath))
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

        self.assertTrue(
            0 == run_err_null("./ldb reduce_levels --db=%s --new_levels=2" % origDbPath)
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

        self.assertTrue(
            0 == run_err_null("./ldb reduce_levels --db=%s --new_levels=3" % origDbPath)
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

        self.assertTrue(
            0 == run_err_null("./ldb compact --db=%s --from=x1 --to=x3" % origDbPath)
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

        self.assertTrue(
            0
            == run_err_null(
                "./ldb compact --db=%s --hex --from=0x6131 --to=0x6134" % origDbPath
            )
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

        # TODO(dilip): Not sure what should be passed to WAL.Currently corrupted.
        self.assertTrue(
            0
            == run_err_null(
                "./ldb dump_wal --db=%s --walfile=%s --header"
                % (origDbPath, os.path.join(origDbPath, "LOG"))
            )
        )
        self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")

    def testCheckConsistency(self):
        print("Running testCheckConsistency...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put x1 y1 --create_if_missing", "OK")
        self.assertRunOK("put x2 y2", "OK")
        self.assertRunOK("get x1", "y1")
        self.assertRunOK("checkconsistency", "OK")

        sstFilePath = my_check_output(
            "ls %s" % os.path.join(dbPath, "*.sst"), shell=True
        )

        # Modify the file
        my_check_output("echo 'evil' > %s" % sstFilePath, shell=True)
        self.assertRunFAIL("checkconsistency")

        # Delete the file
        my_check_output("rm -f %s" % sstFilePath, shell=True)
        self.assertRunFAIL("checkconsistency")

    def dumpLiveFiles(self, params, dumpFile):
        return 0 == run_err_null("./ldb dump_live_files %s > %s" % (params, dumpFile))

    def testDumpLiveFiles(self):
        print("Running testDumpLiveFiles...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put x1 y1 --create_if_missing", "OK")
        self.assertRunOK("put x2 y2 --enable_blob_files", "OK")
        dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
        self.assertTrue(self.dumpLiveFiles("--db=%s" % dbPath, dumpFilePath))
        self.assertRunOK("delete x1", "OK")
        self.assertRunOK("put x3 y3", "OK")
        dumpFilePath = os.path.join(self.TMP_DIR, "dump2")

        # Test that if the user provides a db path that ends with
        # a slash '/', there is no double (or more!) slashes in the
        # SST and manifest file names.

        # Add a '/' at the end of dbPath (which normally shouldnt contain any)
        if dbPath[-1] != "/":
            dbPath += "/"

        # Call the dump_live_files function with the edited dbPath name.
        self.assertTrue(
            self.dumpLiveFiles(
                "--db=%s --decode_blob_index --dump_uncompressed_blobs" % dbPath,
                dumpFilePath,
            )
        )

        # Investigate the output
        with open(dumpFilePath, "r") as tmp:
            data = tmp.read()

        # Check that all the SST filenames have a correct full path (no multiple '/').
        sstFileList = re.findall(r"%s.*\d+.sst" % dbPath, data)
        self.assertTrue(len(sstFileList) >= 1)
        for sstFilename in sstFileList:
            filenumber = re.findall(r"\d+.sst", sstFilename)[0]
            self.assertEqual(sstFilename, dbPath + filenumber)

        # Check that all the Blob filenames have a correct full path (no multiple '/').
        blobFileList = re.findall(r"%s.*\d+.blob" % dbPath, data)
        self.assertTrue(len(blobFileList) >= 1)
        for blobFilename in blobFileList:
            filenumber = re.findall(r"\d+.blob", blobFilename)[0]
            self.assertEqual(blobFilename, dbPath + filenumber)

        # Check that all the manifest filenames
        # have a correct full path (no multiple '/').
        manifestFileList = re.findall(r"%s.*MANIFEST-\d+" % dbPath, data)
        self.assertTrue(len(manifestFileList) >= 1)
        for manifestFilename in manifestFileList:
            filenumber = re.findall(r"(?<=MANIFEST-)\d+", manifestFilename)[0]
            self.assertEqual(manifestFilename, dbPath + "MANIFEST-" + filenumber)

        # Check that the blob file index is decoded.
        decodedBlobIndex = re.findall(r"\[blob ref\]", data)
        self.assertTrue(len(decodedBlobIndex) >= 1)

    def listLiveFilesMetadata(self, params, dumpFile):
        return 0 == run_err_null(
            "./ldb list_live_files_metadata %s > %s" % (params, dumpFile)
        )

    def testListLiveFilesMetadata(self):
        print("Running testListLiveFilesMetadata...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put x1 y1 --create_if_missing", "OK")
        self.assertRunOK("put x2 y2", "OK")

        # Compare the SST filename and the level of list_live_files_metadata
        # with the data collected from dump_live_files.
        dumpFilePath1 = os.path.join(self.TMP_DIR, "dump1")
        self.assertTrue(self.dumpLiveFiles("--db=%s" % dbPath, dumpFilePath1))
        dumpFilePath2 = os.path.join(self.TMP_DIR, "dump2")
        self.assertTrue(
            self.listLiveFilesMetadata(
                "--sort_by_filename --db=%s" % dbPath, dumpFilePath2
            )
        )

        # Collect SST filename and level from dump_live_files
        with open(dumpFilePath1, "r") as tmp:
            data = tmp.read()
            filename1 = re.findall(r".*\d+\.sst", data)[0]
            level1 = re.findall(r"level:\d+", data)[0].split(":")[1]

        # Collect SST filename and level from list_live_files_metadata
        with open(dumpFilePath2, "r") as tmp:
            data = tmp.read()
            filename2 = re.findall(r".*\d+\.sst", data)[0]
            level2 = re.findall(r"level \d+", data)[0].split(" ")[1]

        # Assert equality between filenames and levels.
        self.assertEqual(filename1, filename2)
        self.assertEqual(level1, level2)

        # Create multiple column families and compare the output
        # of list_live_files_metadata with dump_live_files once again.
        # Create new CF, and insert data:
        self.assertRunOK("create_column_family mycol1", "OK")
        self.assertRunOK("put --column_family=mycol1 v1 v2", "OK")
        self.assertRunOK("create_column_family mycol2", "OK")
        self.assertRunOK("put --column_family=mycol2 h1 h2", "OK")
        self.assertRunOK("put --column_family=mycol2 h3 h4", "OK")

        # Call dump_live_files and list_live_files_metadata
        # and pipe the output to compare them later.
        dumpFilePath3 = os.path.join(self.TMP_DIR, "dump3")
        self.assertTrue(self.dumpLiveFiles("--db=%s" % dbPath, dumpFilePath3))
        dumpFilePath4 = os.path.join(self.TMP_DIR, "dump4")
        self.assertTrue(
            self.listLiveFilesMetadata(
                "--sort_by_filename --db=%s" % dbPath, dumpFilePath4
            )
        )

        # dump_live_files:
        # parse the output and create a map:
        # [key: sstFilename]->[value:[LSM level, Column Family Name]]
        referenceMap = {}
        with open(dumpFilePath3, "r") as tmp:
            data = tmp.read()
            # Note: the following regex are contingent on what the
            # dump_live_files outputs.
            namesAndLevels = re.findall(r"\d+.sst level:\d+", data)
            cfs = re.findall(r"(?<=column family name=)\w+", data)
            # re.findall should not reorder the data.
            # Therefore namesAndLevels[i] matches the data from cfs[i].
            for count, nameAndLevel in enumerate(namesAndLevels):
                sstFilename = re.findall(r"\d+.sst", nameAndLevel)[0]
                sstLevel = re.findall(r"(?<=level:)\d+", nameAndLevel)[0]
                cf = cfs[count]
                referenceMap[sstFilename] = [sstLevel, cf]

        # list_live_files_metadata:
        # parse the output and create a map:
        # [key: sstFilename]->[value:[LSM level, Column Family Name]]
        testMap = {}
        with open(dumpFilePath4, "r") as tmp:
            data = tmp.read()
            # Since for each SST file, all the information is contained
            # on one line, the parsing is easy to perform and relies on
            # the appearance of an "00xxx.sst" pattern.
            sstLines = re.findall(r".*\d+.sst.*", data)
            for line in sstLines:
                sstFilename = re.findall(r"\d+.sst", line)[0]
                sstLevel = re.findall(r"(?<=level )\d+", line)[0]
                cf = re.findall(r"(?<=column family \')\w+(?=\')", line)[0]
                testMap[sstFilename] = [sstLevel, cf]

        # Compare the map obtained from dump_live_files and the map
        # obtained from list_live_files_metadata. Everything should match.
        self.assertEqual(referenceMap, testMap)

    def getManifests(self, directory):
        return glob.glob(directory + "/MANIFEST-*")

    def getSSTFiles(self, directory):
        return glob.glob(directory + "/*.sst")

    def getWALFiles(self, directory):
        return glob.glob(directory + "/*.log")

    def getBlobFiles(self, directory):
        return glob.glob(directory + "/*.blob")

    def copyManifests(self, src, dest):
        return 0 == run_err_null("cp " + src + " " + dest)

    def testManifestDump(self):
        print("Running testManifestDump...")
        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put 1 1 --create_if_missing", "OK")
        self.assertRunOK("put 2 2", "OK")
        self.assertRunOK("put 3 3", "OK")
        # Pattern to expect from manifest_dump.
        num = "[0-9]+"
        st = ".*"
        subpat = st + " seq:" + num + ", type:" + num
        regex = num + ":" + num + "\[" + subpat + ".." + subpat + "\]"
        expected_pattern = re.compile(regex)
        cmd = "manifest_dump --db=%s"
        manifest_files = self.getManifests(dbPath)
        self.assertTrue(len(manifest_files) == 1)
        # Test with the default manifest file in dbPath.
        self.assertRunOKFull(
            cmd % dbPath, expected_pattern, unexpected=False, isPattern=True
        )
        self.copyManifests(manifest_files[0], manifest_files[0] + "1")
        manifest_files = self.getManifests(dbPath)
        self.assertTrue(len(manifest_files) == 2)
        # Test with multiple manifest files in dbPath.
        self.assertRunFAILFull(cmd % dbPath)
        # Running it with the copy we just created should pass.
        self.assertRunOKFull(
            (cmd + " --path=%s") % (dbPath, manifest_files[1]),
            expected_pattern,
            unexpected=False,
            isPattern=True,
        )
        # Make sure that using the dump with --path will result in identical
        # output as just using manifest_dump.
        cmd = "dump --path=%s"
        self.assertRunOKFull(
            (cmd) % (manifest_files[1]),
            expected_pattern,
            unexpected=False,
            isPattern=True,
        )

        # Check if null characters doesn't infer with output format.
        self.assertRunOK("put a1 b1", "OK")
        self.assertRunOK("put a2 b2", "OK")
        self.assertRunOK("put --hex 0x12000DA0 0x80C0000B", "OK")
        self.assertRunOK("put --hex 0x7200004f 0x80000004", "OK")
        self.assertRunOK("put --hex 0xa000000a 0xf000000f", "OK")
        self.assertRunOK("put a3 b3", "OK")
        self.assertRunOK("put a4 b4", "OK")

        # Verifies that all "levels" are printed out.
        # There should be 66 mentions of levels.
        expected_verbose_output = re.compile("matched")
        # Test manifest_dump verbose and verify that key 0x7200004f
        # is present. Note that we are forced to use grep here because
        # an output with a non-terminating null character in it isn't piped
        # correctly through the Python subprocess object.
        # Also note that 0x72=r and 0x4f=O, hence the regex \'r.{2}O\'
        # (we cannot use null character in the subprocess input either,
        # so we have to use '.{2}')
        cmd_verbose = (
            "manifest_dump --verbose --db=%s | grep -aq $''r.{2}O'' && echo 'matched' || echo 'not matched'"
            % dbPath
        )

        self.assertRunOKFull(
            cmd_verbose, expected_verbose_output, unexpected=False, isPattern=True
        )

    def testGetProperty(self):
        print("Running testGetProperty...")
        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put 1 1 --create_if_missing", "OK")
        self.assertRunOK("put 2 2", "OK")
        # A "string" property
        cmd = "--db=%s get_property rocksdb.estimate-num-keys"
        self.assertRunOKFull(cmd % dbPath, "rocksdb.estimate-num-keys: 2")
        # A "map" property
        # FIXME: why doesn't this pick up two entries?
        cmd = "--db=%s get_property rocksdb.aggregated-table-properties"
        part = "rocksdb.aggregated-table-properties.num_entries: "
        expected_pattern = re.compile(part)
        self.assertRunOKFull(
            cmd % dbPath, expected_pattern, unexpected=False, isPattern=True
        )
        # An invalid property
        cmd = "--db=%s get_property rocksdb.this-property-does-not-exist"
        self.assertRunFAILFull(cmd % dbPath)

    def testSSTDump(self):
        print("Running testSSTDump...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put sst1 sst1_val --create_if_missing", "OK")
        self.assertRunOK("put sst2 sst2_val --enable_blob_files", "OK")
        self.assertRunOK("get sst1", "sst1_val")

        # Pattern to expect from SST dump.
        regex = ".*Sst file format:.*\n.*\[blob ref\].*"
        expected_pattern = re.compile(regex)

        sst_files = self.getSSTFiles(dbPath)
        self.assertTrue(len(sst_files) >= 1)
        cmd = "dump --path=%s --decode_blob_index"
        self.assertRunOKFull(
            (cmd) % (sst_files[0]), expected_pattern, unexpected=False, isPattern=True
        )

    def testBlobDump(self):
        print("Running testBlobDump")
        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("batchput x1 y1 --create_if_missing --enable_blob_files", "OK")
        self.assertRunOK(
            'batchput --enable_blob_files x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK"
        )

        # Pattern to expect from blob file dump.
        regex = ".*Blob log header[\s\S]*Blob log footer[\s\S]*Read record[\s\S]*Summary"  # noqa
        expected_pattern = re.compile(regex)
        blob_files = self.getBlobFiles(dbPath)
        self.assertTrue(len(blob_files) >= 1)
        cmd = "dump --path=%s --dump_uncompressed_blobs"
        self.assertRunOKFull(
            (cmd) % (blob_files[0]), expected_pattern, unexpected=False, isPattern=True
        )

    def testWALDump(self):
        print("Running testWALDump...")

        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put wal1 wal1_val --create_if_missing", "OK")
        self.assertRunOK("put wal2 wal2_val", "OK")
        self.assertRunOK("get wal1", "wal1_val")

        # Pattern to expect from WAL dump.
        regex = "^Sequence,Count,ByteSize,Physical Offset,Key\(s\).*"
        expected_pattern = re.compile(regex)

        wal_files = self.getWALFiles(dbPath)
        self.assertTrue(len(wal_files) >= 1)
        cmd = "dump --path=%s"
        self.assertRunOKFull(
            (cmd) % (wal_files[0]), expected_pattern, unexpected=False, isPattern=True
        )

    def testListColumnFamilies(self):
        print("Running testListColumnFamilies...")
        self.assertRunOK("put x1 y1 --create_if_missing", "OK")
        cmd = 'list_column_families | grep -v "Column families"'
        # Test on valid dbPath.
        self.assertRunOK(cmd, "{default}")
        # Test on empty path.
        self.assertRunFAIL(cmd)

    def testColumnFamilies(self):
        print("Running testColumnFamilies...")
        _ = os.path.join(self.TMP_DIR, self.DB_NAME)
        self.assertRunOK("put cf1_1 1 --create_if_missing", "OK")
        self.assertRunOK("put cf1_2 2 --create_if_missing", "OK")
        self.assertRunOK("put cf1_3 3 --try_load_options", "OK")
        # Given non-default column family to single CF DB.
        self.assertRunFAIL("get cf1_1 --column_family=two")
        self.assertRunOK("create_column_family two", "OK")
        self.assertRunOK("put cf2_1 1 --create_if_missing --column_family=two", "OK")
        self.assertRunOK("put cf2_2 2 --create_if_missing --column_family=two", "OK")
        self.assertRunOK("delete cf1_2", "OK")
        self.assertRunOK("create_column_family three", "OK")
        self.assertRunOK("delete cf2_2 --column_family=two", "OK")
        self.assertRunOK("put cf3_1 3 --create_if_missing --column_family=three", "OK")
        self.assertRunOK("get cf1_1 --column_family=default", "1")
        self.assertRunOK("dump --column_family=two", "cf2_1 ==> 1\nKeys in range: 1")
        self.assertRunOK(
            "dump --column_family=two --try_load_options",
            "cf2_1 ==> 1\nKeys in range: 1",
        )
        self.assertRunOK("dump", "cf1_1 ==> 1\ncf1_3 ==> 3\nKeys in range: 2")
        self.assertRunOK("get cf2_1 --column_family=two", "1")
        self.assertRunOK("get cf3_1 --column_family=three", "3")
        self.assertRunOK("drop_column_family three", "OK")
        # non-existing column family.
        self.assertRunFAIL("get cf3_1 --column_family=four")
        self.assertRunFAIL("drop_column_family four")

    def testIngestExternalSst(self):
        print("Running testIngestExternalSst...")

        # Dump, load, write external sst and ingest it in another db
        dbPath = os.path.join(self.TMP_DIR, "db1")
        self.assertRunOK(
            "batchput --db=%s --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4" % dbPath,
            "OK",
        )
        self.assertRunOK("scan --db=%s" % dbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
        dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
        with open(dumpFilePath, "w") as f:
            f.write("x1 ==> y10\nx2 ==> y20\nx3 ==> y30\nx4 ==> y40")
        externSstPath = os.path.join(self.TMP_DIR, "extern_data1.sst")
        self.assertTrue(
            self.writeExternSst(
                "--create_if_missing --db=%s" % dbPath, dumpFilePath, externSstPath
            )
        )
        # cannot ingest if allow_global_seqno is false
        self.assertFalse(
            self.ingestExternSst(
                "--create_if_missing --allow_global_seqno=false --db=%s" % dbPath,
                externSstPath,
            )
        )
        self.assertTrue(
            self.ingestExternSst(
                "--create_if_missing --allow_global_seqno --db=%s" % dbPath,
                externSstPath,
            )
        )
        self.assertRunOKFull(
            "scan --db=%s" % dbPath, "x1 : y10\nx2 : y20\nx3 : y30\nx4 : y40"
        )


if __name__ == "__main__":
    unittest.main()