nilmdb/tests/test_cmdline.py

# -*- coding: utf-8 -*-

import nilmdb
from nilmdb.utils.printf import *
import nilmdb.cmdline

import unittest
from nose.tools import *
from nose.tools import assert_raises
import itertools
import datetime_tz
import os
import shutil
import sys
import threading
import urllib2
from urllib2 import urlopen, HTTPError
import Queue
import StringIO
import shlex

from testutil.helpers import *

testdb = "tests/cmdline-testdb"

def server_start(max_results = None, bulkdata_args = {}):
    global test_server, test_db
    # Start web app on a custom port
    test_db = nilmdb.NilmDB(testdb, sync = False,
                            max_results = max_results,
                            bulkdata_args = bulkdata_args)
    test_server = nilmdb.Server(test_db, host = "127.0.0.1",
                                port = 12380, stoppable = False,
                                fast_shutdown = True,
                                force_traceback = False)
    test_server.start(blocking = False)

def server_stop():
    global test_server, test_db
    # Close web app
    test_server.stop()
    test_db.close()

def setup_module():
    global test_server, test_db
    # Clear out DB
    recursive_unlink(testdb)
    server_start()

def teardown_module():
    server_stop()

# Add an encoding property to StringIO so Python will convert Unicode
# properly when writing or reading.
class UTF8StringIO(StringIO.StringIO):
    encoding = 'utf-8'

class TestCmdline(object):

    def run(self, arg_string, infile=None, outfile=None):
        """Run a cmdline client with the specified argument string,
        passing the given input.  Returns a tuple with the output and
        exit code"""
        # printf("TZ=UTC ./nilmtool.py %s\n", arg_string)
        class stdio_wrapper:
            def __init__(self, stdin, stdout, stderr):
                self.io = (stdin, stdout, stderr)
            def __enter__(self):
                self.saved = ( sys.stdin, sys.stdout, sys.stderr )
                ( sys.stdin, sys.stdout, sys.stderr ) = self.io
            def __exit__(self, type, value, traceback):
                ( sys.stdin, sys.stdout, sys.stderr ) = self.saved
        # Empty input if none provided
        if infile is None:
            infile = UTF8StringIO("")
        # Capture stderr
        errfile = UTF8StringIO()
        if outfile is None:
            # If no output file, capture stdout with stderr
            outfile = errfile
        with stdio_wrapper(infile, outfile, errfile) as s:
            try:
                # shlex doesn't support Unicode very well.  Encode the
                # string as UTF-8 explicitly before splitting.
                args = shlex.split(arg_string.encode('utf-8'))
                nilmdb.cmdline.Cmdline(args).run()
                sys.exit(0)
            except SystemExit as e:
                exitcode = e.code
        captured = outfile.getvalue()
        self.captured = captured
        self.exitcode = exitcode

    def ok(self, arg_string, infile = None):
        self.run(arg_string, infile)
        if self.exitcode != 0:
            self.dump()
            eq_(self.exitcode, 0)

    def fail(self, arg_string, infile = None, exitcode = None):
        self.run(arg_string, infile)
        if exitcode is not None and self.exitcode != exitcode:
            self.dump()
            eq_(self.exitcode, exitcode)
        if self.exitcode == 0:
            self.dump()
            ne_(self.exitcode, 0)

    def contain(self, checkstring):
        in_(checkstring, self.captured)

    def match(self, checkstring):
        eq_(checkstring, self.captured)

    def matchfile(self, file):
        # Captured data should match file contents exactly
        with open(file) as f:
            contents = f.read()
            if contents != self.captured:
                #print contents[1:1000] + "\n"
                #print self.captured[1:1000] + "\n"
                raise AssertionError("captured data doesn't match " + file)

    def matchfilecount(self, file):
        # Last line of captured data should match the number of
        # non-commented lines in file
        count = 0
        with open(file) as f:
            for line in f:
                if line[0] != '#':
                    count += 1
        eq_(self.captured.splitlines()[-1], sprintf("%d", count))

    def dump(self):
        printf("-----dump start-----\n%s-----dump end-----\n", self.captured)

    def test_01_basic(self):

        # help
        self.ok("--help")
        self.contain("usage:")

        # fail for no args
        self.fail("")

        # fail for no such option
        self.fail("--nosuchoption")

        # fail for bad command
        self.fail("badcommand")

        # try some URL constructions
        self.fail("--url http://nosuchurl/ info")
        self.contain("Couldn't resolve host 'nosuchurl'")

        self.fail("--url nosuchurl info")
        self.contain("Couldn't resolve host 'nosuchurl'")

        self.fail("-u nosuchurl/foo info")
        self.contain("Couldn't resolve host 'nosuchurl'")

        self.fail("-u localhost:0 info")
        self.contain("couldn't connect to host")

        self.ok("-u localhost:12380 info")
        self.ok("info")

        # Duplicated arguments should fail, but this isn't implemented
        # due to it being kind of a pain with argparse.
        if 0:
            self.fail("-u url1 -u url2 info")
            self.contain("duplicated argument")

            self.fail("list --detail --detail")
            self.contain("duplicated argument")

            self.fail("list --detail --path path1 --path path2")
            self.contain("duplicated argument")

            self.fail("extract --start 2000-01-01 --start 2001-01-02")
            self.contain("duplicated argument")

    def test_02_info(self):
        self.ok("info")
        self.contain("Server URL: http://localhost:12380/")
        self.contain("Server version: " + test_server.version)
        self.contain("Server database path")
        self.contain("Server database size")

    def test_03_createlist(self):
        # Basic stream tests, like those in test_client.

        # No streams
        self.ok("list")
        self.match("")

        # Bad paths
        self.fail("create foo/bar/baz PrepData")
        self.contain("paths must start with /")

        self.fail("create /foo PrepData")
        self.contain("invalid path")

        # Bad layout type
        self.fail("create /newton/prep NoSuchLayout")
        self.contain("no such layout")
        self.fail("create /newton/prep float32_0")
        self.contain("no such layout")
        self.fail("create /newton/prep float33_1")
        self.contain("no such layout")

        # Create a few streams
        self.ok("create /newton/zzz/rawnotch RawNotchedData")
        self.ok("create /newton/prep PrepData")
        self.ok("create /newton/raw RawData")

        # Should not be able to create a stream with another stream as
        # its parent
        self.fail("create /newton/prep/blah PrepData")
        self.contain("path is subdir of existing node")

        # Should not be able to create a stream at a location that
        # has other nodes as children
        self.fail("create /newton/zzz PrepData")
        self.contain("subdirs of this path already exist")

        # Verify we got those 3 streams and they're returned in
        # alphabetical order.
        self.ok("list")
        self.match("/newton/prep PrepData\n"
                   "/newton/raw RawData\n"
                   "/newton/zzz/rawnotch RawNotchedData\n")

        # Match just one type or one path.  Also check
        # that --path is optional
        self.ok("list --path /newton/raw")
        self.match("/newton/raw RawData\n")

        self.ok("list /newton/raw")
        self.match("/newton/raw RawData\n")

        self.fail("list -p /newton/raw /newton/raw")
        self.contain("too many paths")

        self.ok("list --layout RawData")
        self.match("/newton/raw RawData\n")

        # Wildcard matches
        self.ok("list --layout Raw*")
        self.match("/newton/raw RawData\n"
                   "/newton/zzz/rawnotch RawNotchedData\n")

        self.ok("list --path *zzz* --layout Raw*")
        self.match("/newton/zzz/rawnotch RawNotchedData\n")

        self.ok("list *zzz* --layout Raw*")
        self.match("/newton/zzz/rawnotch RawNotchedData\n")

        self.ok("list --path *zzz* --layout Prep*")
        self.match("")

        # reversed range
        self.fail("list /newton/prep --start 2020-01-01 --end 2000-01-01")
        self.contain("start is after end")

    def test_04_metadata(self):
        # Set / get metadata
        self.fail("metadata")
        self.fail("metadata --get")

        self.ok("metadata /newton/prep")
        self.match("")

        self.ok("metadata /newton/raw --get")
        self.match("")

        self.ok("metadata /newton/prep --set "
                "'description=The Data' "
                "v_scale=1.234")
        self.ok("metadata /newton/raw --update "
                "'description=The Data'")
        self.ok("metadata /newton/raw --update "
                "v_scale=1.234")

        # various parsing tests
        self.ok("metadata /newton/raw --update foo=")
        self.fail("metadata /newton/raw --update =bar")
        self.fail("metadata /newton/raw --update foo==bar")
        self.fail("metadata /newton/raw --update foo;bar")

        # errors
        self.fail("metadata /newton/nosuchstream foo=bar")
        self.contain("unrecognized arguments")
        self.fail("metadata /newton/nosuchstream")
        self.contain("No stream at path")
        self.fail("metadata /newton/nosuchstream --set foo=bar")
        self.contain("No stream at path")

        self.ok("metadata /newton/prep")
        self.match("description=The Data\nv_scale=1.234\n")

        self.ok("metadata /newton/prep --get")
        self.match("description=The Data\nv_scale=1.234\n")

        self.ok("metadata /newton/prep --get descr")
        self.match("descr=\n")

        self.ok("metadata /newton/prep --get description")
        self.match("description=The Data\n")

        self.ok("metadata /newton/prep --get description v_scale")
        self.match("description=The Data\nv_scale=1.234\n")

        self.ok("metadata /newton/prep --set "
                "'description=The Data'")

        self.ok("metadata /newton/prep --get")
        self.match("description=The Data\n")

        self.fail("metadata /newton/nosuchpath")
        self.contain("No stream at path /newton/nosuchpath")

    def test_05_parsetime(self):
        os.environ['TZ'] = "America/New_York"
        cmd = nilmdb.cmdline.Cmdline(None)
        test = datetime_tz.datetime_tz.now()
        eq_(cmd.parse_time(str(test)), test)
        test = datetime_tz.datetime_tz.smartparse("20120405 1400-0400")
        eq_(cmd.parse_time("hi there 20120405 1400-0400 testing! 123"), test)
        eq_(cmd.parse_time("20120405 1800 UTC"), test)
        eq_(cmd.parse_time("20120405 1400-0400 UTC"), test)
        for badtime in [ "20120405 1400-9999", "hello", "-", "", "14:00" ]:
            with assert_raises(ValueError):
                x = cmd.parse_time(badtime)
        eq_(cmd.parse_time("snapshot-20120405-140000.raw.gz"), test)
        eq_(cmd.parse_time("prep-20120405T1400"), test)

    def test_06_insert(self):
        self.ok("insert --help")

        self.fail("insert /foo/bar baz qwer")
        self.contain("Error getting stream info")

        self.fail("insert /newton/prep baz qwer")
        self.match("Error opening input file baz\n")

        self.fail("insert /newton/prep")
        self.contain("Error extracting time")

        self.fail("insert --start 19801205 /newton/prep 1 2 3 4")
        self.contain("--start can only be used with one input file")

        self.fail("insert /newton/prep "
                  "tests/data/prep-20120323T1000")

        # insert pre-timestamped data, from stdin
        os.environ['TZ'] = "UTC"
        with open("tests/data/prep-20120323T1004-timestamped") as input:
            self.ok("insert --none /newton/prep", input)

        # insert data with normal timestamper from filename
        os.environ['TZ'] = "UTC"
        self.ok("insert --rate 120 /newton/prep "
                "tests/data/prep-20120323T1000 "
                "tests/data/prep-20120323T1002")

        # overlap
        os.environ['TZ'] = "UTC"
        self.fail("insert --rate 120 /newton/prep "
                  "tests/data/prep-20120323T1004")
        self.contain("overlap")

        # Just to help test more situations -- stop and restart
        # the server now.  This tests nilmdb's interval caching,
        # at the very least.
        server_stop()
        server_start()

        # still an overlap if we specify a different start
        os.environ['TZ'] = "America/New_York"
        self.fail("insert --rate 120 --start '03/23/2012 06:05:00' /newton/prep"
                  " tests/data/prep-20120323T1004")
        self.contain("overlap")

        # wrong format
        os.environ['TZ'] = "UTC"
        self.fail("insert --rate 120 /newton/raw "
                  "tests/data/prep-20120323T1004")
        self.contain("Error parsing input data")

        # empty data does nothing
        self.ok("insert --rate 120 --start '03/23/2012 06:05:00' /newton/prep "
                "/dev/null")

        # bad start time
        self.fail("insert --rate 120 --start 'whatever' /newton/prep /dev/null")

    def test_07_detail(self):
        # Just count the number of lines, it's probably fine
        self.ok("list --detail")
        lines_(self.captured, 8)

        self.ok("list --detail --path *prep")
        lines_(self.captured, 4)

        self.ok("list --detail --path *prep --start='23 Mar 2012 10:02'")
        lines_(self.captured, 3)

        self.ok("list --detail --path *prep --start='23 Mar 2012 10:05'")
        lines_(self.captured, 2)

        self.ok("list --detail --path *prep --start='23 Mar 2012 10:05:15'")
        lines_(self.captured, 2)
        self.contain("10:05:15.000")

        self.ok("list --detail --path *prep --start='23 Mar 2012 10:05:15.50'")
        lines_(self.captured, 2)
        self.contain("10:05:15.500")

        self.ok("list --detail --path *prep --start='23 Mar 2012 19:05:15.50'")
        lines_(self.captured, 2)
        self.contain("no intervals")

        self.ok("list --detail --path *prep --start='23 Mar 2012 10:05:15.50'"
                + " --end='23 Mar 2012 10:05:15.50'")
        lines_(self.captured, 2)
        self.contain("10:05:15.500")

        self.ok("list --detail")
        lines_(self.captured, 8)

    def test_08_extract(self):
        # nonexistent stream
        self.fail("extract /no/such/foo --start 2000-01-01 --end 2020-01-01")
        self.contain("Error getting stream info")

        # reversed range
        self.fail("extract -a /newton/prep --start 2020-01-01 --end 2000-01-01")
        self.contain("start is after end")

        # empty ranges return error 2
        self.fail("extract -a /newton/prep " +
                  "--start '23 Mar 2012 10:00:30' " +
                  "--end '23 Mar 2012 10:00:30'", exitcode = 2)
        self.contain("no data")
        self.fail("extract -a /newton/prep " +
                  "--start '23 Mar 2012 10:00:30.000001' " +
                  "--end '23 Mar 2012 10:00:30.000001'", exitcode = 2)
        self.contain("no data")
        self.fail("extract -a /newton/prep " +
                  "--start '23 Mar 2022 10:00:30' " +
                  "--end '23 Mar 2022 10:00:30'", exitcode = 2)
        self.contain("no data")

        # but are ok if we're just counting results
        self.ok("extract --count /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:00:30'")
        self.match("0\n")
        self.ok("extract -c /newton/prep " +
                "--start '23 Mar 2012 10:00:30.000001' " +
                "--end '23 Mar 2012 10:00:30.000001'")
        self.match("0\n")

        # Check various dumps against stored copies of how they should appear
        def test(file, start, end, extra=""):
            self.ok("extract " + extra + " /newton/prep " +
                    "--start '23 Mar 2012 " + start + "' " +
                    "--end '23 Mar 2012 " + end + "'")
            self.matchfile("tests/data/extract-" + str(file))
            self.ok("extract --count " + extra + " /newton/prep " +
                    "--start '23 Mar 2012 " + start + "' " +
                    "--end '23 Mar 2012 " + end + "'")
            self.matchfilecount("tests/data/extract-" + str(file))
        test(1, "10:00:30", "10:00:31", extra="-a")
        test(1, "10:00:30.000000", "10:00:31", extra="-a")
        test(2, "10:00:30.000001", "10:00:31")
        test(2, "10:00:30.008333", "10:00:31")
        test(3, "10:00:30.008333", "10:00:30.008334")
        test(3, "10:00:30.008333", "10:00:30.016667")
        test(4, "10:00:30.008333", "10:00:30.025")
        test(5, "10:00:30", "10:00:31", extra="--annotate --bare")
        test(6, "10:00:30", "10:00:31", extra="-b")

        # all data put in by tests
        self.ok("extract -a /newton/prep --start 2000-01-01 --end 2020-01-01")
        lines_(self.captured, 43204)
        self.ok("extract -c /newton/prep --start 2000-01-01 --end 2020-01-01")
        self.match("43200\n")

    def test_09_truncated(self):
        # Test truncated responses by overriding the nilmdb max_results
        server_stop()
        server_start(max_results = 2)
        self.ok("list --detail")
        lines_(self.captured, 8)
        server_stop()
        server_start()

    def test_10_remove(self):
        # Removing data

        # Try nonexistent stream
        self.fail("remove /no/such/foo --start 2000-01-01 --end 2020-01-01")
        self.contain("Error getting stream info")

        self.fail("remove /newton/prep --start 2020-01-01 --end 2000-01-01")
        self.contain("start is after end")

        # empty ranges return success, backwards ranges return error
        self.ok("remove /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:00:30'")
        self.match("")
        self.ok("remove /newton/prep " +
                "--start '23 Mar 2012 10:00:30.000001' " +
                "--end '23 Mar 2012 10:00:30.000001'")
        self.match("")
        self.ok("remove /newton/prep " +
                "--start '23 Mar 2022 10:00:30' " +
                "--end '23 Mar 2022 10:00:30'")
        self.match("")

        # Verbose
        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:00:30'")
        self.match("0\n")
        self.ok("remove --count /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:00:30'")
        self.match("0\n")

        # Make sure we have the data we expect
        self.ok("list --detail /newton/prep")
        self.match("/newton/prep PrepData\n" +
                   "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:01:59.991668 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:02:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:03:59.991668 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:04:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:05:59.991668 +0000 ]\n")

        # Remove various chunks of prep data and make sure
        # they're gone.
        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:00:40'")
        self.match("1200\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:10' " +
                "--end '23 Mar 2012 10:00:20'")
        self.match("1200\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:05' " +
                "--end '23 Mar 2012 10:00:25'")
        self.match("1200\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:03:50' " +
                "--end '23 Mar 2012 10:06:50'")
        self.match("15600\n")

        self.ok("extract -c /newton/prep --start 2000-01-01 --end 2020-01-01")
        self.match("24000\n")

        # See the missing chunks in list output
        self.ok("list --detail /newton/prep")
        self.match("/newton/prep PrepData\n" +
                   "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:00:05.000000 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:00:25.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:00:30.000000 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:00:40.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:01:59.991668 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:02:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:03:50.000000 +0000 ]\n")

        # Remove all data, verify it's missing
        self.ok("remove /newton/prep --start 2000-01-01 --end 2020-01-01")
        self.match("")  # no count requested this time
        self.ok("list --detail /newton/prep")
        self.match("/newton/prep PrepData\n" +
                   "  (no intervals)\n")

        # Reinsert some data, to verify that no overlaps with deleted
        # data are reported
        os.environ['TZ'] = "UTC"
        self.ok("insert --rate 120 /newton/prep "
                "tests/data/prep-20120323T1000 "
                "tests/data/prep-20120323T1002")

    def test_11_destroy(self):
        # Delete records
        self.ok("destroy --help")

        self.fail("destroy")
        self.contain("too few arguments")

        self.fail("destroy /no/such/stream")
        self.contain("No stream at path")

        self.fail("destroy asdfasdf")
        self.contain("No stream at path")

        # From previous tests, we have:
        self.ok("list")
        self.match("/newton/prep PrepData\n"
                   "/newton/raw RawData\n"
                   "/newton/zzz/rawnotch RawNotchedData\n")

        # Notice how they're not empty
        self.ok("list --detail")
        lines_(self.captured, 7)

        # Delete some
        self.ok("destroy /newton/prep")
        self.ok("list")
        self.match("/newton/raw RawData\n"
                   "/newton/zzz/rawnotch RawNotchedData\n")

        self.ok("destroy /newton/zzz/rawnotch")
        self.ok("list")
        self.match("/newton/raw RawData\n")

        self.ok("destroy /newton/raw")
        self.ok("create /newton/raw RawData")
        self.ok("destroy /newton/raw")
        self.ok("list")
        self.match("")

        # Re-create a previously deleted location, and some new ones
        rebuild = [ "/newton/prep", "/newton/zzz",
                    "/newton/raw", "/newton/asdf/qwer" ]
        for path in rebuild:
            # Create the path
            self.ok("create " + path + " PrepData")
            self.ok("list")
            self.contain(path)
            # Make sure it was created empty
            self.ok("list --detail --path " + path)
            self.contain("(no intervals)")

    def test_12_unicode(self):
        # Unicode paths.
        self.ok("destroy /newton/asdf/qwer")
        self.ok("destroy /newton/prep")
        self.ok("destroy /newton/raw")
        self.ok("destroy /newton/zzz")

        self.ok(u"create /düsseldorf/raw uint16_6")
        self.ok("list --detail")
        self.contain(u"/düsseldorf/raw uint16_6")
        self.contain("(no intervals)")

        # Unicode metadata
        self.ok(u"metadata /düsseldorf/raw --set α=beta 'γ=δ'")
        self.ok(u"metadata /düsseldorf/raw --update 'α=β ε τ α'")
        self.ok(u"metadata /düsseldorf/raw")
        self.match(u"α=β ε τ α\nγ=δ\n")

        self.ok(u"destroy /düsseldorf/raw")

    def test_13_files(self):
        # Test BulkData's ability to split into multiple files,
        # by forcing the file size to be really small.
        server_stop()
        server_start(bulkdata_args = { "file_size" : 920, # 23 rows per file
                                       "files_per_dir" : 3 })

        # Fill data
        self.ok("create /newton/prep float32_8")
        os.environ['TZ'] = "UTC"
        with open("tests/data/prep-20120323T1004-timestamped") as input:
            self.ok("insert --none /newton/prep", input)

        # Extract it
        self.ok("extract /newton/prep --start '2000-01-01' " +
                "--end '2012-03-23 10:04:01'")
        lines_(self.captured, 120)
        self.ok("extract /newton/prep --start '2000-01-01' " +
                "--end '2022-03-23 10:04:01'")
        lines_(self.captured, 14400)

        # Make sure there were lots of files generated in the database
        # dir
        nfiles = 0
        for (dirpath, dirnames, filenames) in os.walk(testdb):
            nfiles += len(filenames)
        assert(nfiles > 500)

        # Make sure we can restart the server with a different file
        # size and have it still work
        server_stop()
        server_start()
        self.ok("extract /newton/prep --start '2000-01-01' " +
                "--end '2022-03-23 10:04:01'")
        lines_(self.captured, 14400)

        # Now recreate the data one more time and make sure there are
        # fewer files.
        self.ok("destroy /newton/prep")
        self.fail("destroy /newton/prep") # already destroyed
        self.ok("create /newton/prep float32_8")
        os.environ['TZ'] = "UTC"
        with open("tests/data/prep-20120323T1004-timestamped") as input:
            self.ok("insert --none /newton/prep", input)
        nfiles = 0
        for (dirpath, dirnames, filenames) in os.walk(testdb):
            nfiles += len(filenames)
        lt_(nfiles, 50)
        self.ok("destroy /newton/prep") # destroy again

    def test_14_remove_files(self):
        # Test BulkData's ability to remove when data is split into
        # multiple files.  Should be a fairly comprehensive test of
        # remove functionality.
        server_stop()
        server_start(bulkdata_args = { "file_size" : 920, # 23 rows per file
                                       "files_per_dir" : 3 })

        # Insert data.  Just for fun, insert out of order
        self.ok("create /newton/prep PrepData")
        os.environ['TZ'] = "UTC"
        self.ok("insert --rate 120 /newton/prep "
                "tests/data/prep-20120323T1002 "
                "tests/data/prep-20120323T1000")

        # Should take up about 2.8 MB here (including directory entries)
        du_before = nilmdb.utils.diskusage.du_bytes(testdb)

        # Make sure we have the data we expect
        self.ok("list --detail")
        self.match("/newton/prep PrepData\n" +
                   "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:01:59.991668 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:02:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:03:59.991668 +0000 ]\n")

        # Remove various chunks of prep data and make sure
        # they're gone.
        self.ok("extract -c /newton/prep --start 2000-01-01 --end 2020-01-01")
        self.match("28800\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:30' " +
                "--end '23 Mar 2012 10:03:30'")
        self.match("21600\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:10' " +
                "--end '23 Mar 2012 10:00:20'")
        self.match("1200\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:00:05' " +
                "--end '23 Mar 2012 10:00:25'")
        self.match("1200\n")

        self.ok("remove -c /newton/prep " +
                "--start '23 Mar 2012 10:03:50' " +
                "--end '23 Mar 2012 10:06:50'")
        self.match("1200\n")

        self.ok("extract -c /newton/prep --start 2000-01-01 --end 2020-01-01")
        self.match("3600\n")

        # See the missing chunks in list output
        self.ok("list --detail")
        self.match("/newton/prep PrepData\n" +
                   "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:00:05.000000 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:00:25.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:00:30.000000 +0000 ]\n"
                   "  [ Fri, 23 Mar 2012 10:03:30.000000 +0000"
                   " -> Fri, 23 Mar 2012 10:03:50.000000 +0000 ]\n")

        # We have 1/8 of the data that we had before, so the file size
        # should have dropped below 1/4 of what it used to be
        du_after = nilmdb.utils.diskusage.du_bytes(testdb)
        lt_(du_after, (du_before / 4))

        # Remove anything that came from the 10:02 data file
        self.ok("remove /newton/prep " +
                "--start '23 Mar 2012 10:02:00' --end '2020-01-01'")

        # Re-insert 19 lines from that file, then remove them again.
        # With the specific file_size above, this will cause the last
        # file in the bulk data storage to be exactly file_size large,
        # so removing the data should also remove that last file.
        self.ok("insert --rate 120 /newton/prep " +
                "tests/data/prep-20120323T1002-first19lines")
        self.ok("remove /newton/prep " +
                "--start '23 Mar 2012 10:02:00' --end '2020-01-01'")

        # Shut down and restart server, to force nrows to get refreshed.
        server_stop()
        server_start()

        # Re-add the full 10:02 data file.  This tests adding new data once
        # we removed data near the end.
        self.ok("insert --rate 120 /newton/prep tests/data/prep-20120323T1002")

        # See if we can extract it all
        self.ok("extract /newton/prep --start 2000-01-01 --end 2020-01-01")
        lines_(self.captured, 15600)