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test_deepcheck.py

import os, simplejson, urllib
from cStringIO import StringIO
from twisted.trial import unittest
from twisted.internet import defer
from twisted.internet import threads # CLI tests use deferToThread
from allmydata.immutable import upload
from allmydata.mutable.common import UnrecoverableFileError
from allmydata.util import idlib
from allmydata.util import base32
from allmydata.scripts import runner
from allmydata.interfaces import ICheckResults, ICheckAndRepairResults, \
     IDeepCheckResults, IDeepCheckAndRepairResults
from allmydata.monitor import Monitor, OperationCancelledError
from allmydata.uri import LiteralFileURI
from twisted.web.client import getPage

from allmydata.test.common import ErrorMixin, _corrupt_mutable_share_data, \
     ShouldFailMixin
from allmydata.test.common_util import StallMixin
from allmydata.test.no_network import GridTestMixin

timeout = 2400 # One of these took 1046.091s on Zandr's ARM box.

class MutableChecker(GridTestMixin, unittest.TestCase, ErrorMixin):
    def _run_cli(self, argv):
        stdout, stderr = StringIO(), StringIO()
        # this can only do synchronous operations
        assert argv[0] == "debug"
        runner.runner(argv, run_by_human=False, stdout=stdout, stderr=stderr)
        return stdout.getvalue()

    def test_good(self):
        self.basedir = "deepcheck/MutableChecker/good"
        self.set_up_grid()
        CONTENTS = "a little bit of data"
        d = self.g.clients[0].create_mutable_file(CONTENTS)
        def _created(node):
            self.node = node
            self.fileurl = "uri/" + urllib.quote(node.get_uri())
            si = self.node.get_storage_index()
        d.addCallback(_created)
        # now make sure the webapi verifier sees no problems
        d.addCallback(lambda ign: self.GET(self.fileurl+"?t=check&verify=true",
                                           method="POST"))
        def _got_results(out):
            self.failUnless("<span>Healthy : Healthy</span>" in out, out)
            self.failUnless("Recoverable Versions: 10*seq1-" in out, out)
            self.failIf("Not Healthy!" in out, out)
            self.failIf("Unhealthy" in out, out)
            self.failIf("Corrupt Shares" in out, out)
        d.addCallback(_got_results)
        d.addErrback(self.explain_web_error)
        return d

    def test_corrupt(self):
        self.basedir = "deepcheck/MutableChecker/corrupt"
        self.set_up_grid()
        CONTENTS = "a little bit of data"
        d = self.g.clients[0].create_mutable_file(CONTENTS)
        def _stash_and_corrupt(node):
            self.node = node
            self.fileurl = "uri/" + urllib.quote(node.get_uri())
            self.corrupt_shares_numbered(node.get_uri(), [0],
                                         _corrupt_mutable_share_data)
        d.addCallback(_stash_and_corrupt)
        # now make sure the webapi verifier notices it
        d.addCallback(lambda ign: self.GET(self.fileurl+"?t=check&verify=true",
                                           method="POST"))
        def _got_results(out):
            self.failUnless("Not Healthy!" in out, out)
            self.failUnless("Unhealthy: best version has only 9 shares (encoding is 3-of-10)" in out, out)
            self.failUnless("Corrupt Shares:" in out, out)
        d.addCallback(_got_results)

        # now make sure the webapi repairer can fix it
        d.addCallback(lambda ign:
                      self.GET(self.fileurl+"?t=check&verify=true&repair=true",
                               method="POST"))
        def _got_repair_results(out):
            self.failUnless("<div>Repair successful</div>" in out, out)
        d.addCallback(_got_repair_results)
        d.addCallback(lambda ign: self.GET(self.fileurl+"?t=check&verify=true",
                                           method="POST"))
        def _got_postrepair_results(out):
            self.failIf("Not Healthy!" in out, out)
            self.failUnless("Recoverable Versions: 10*seq" in out, out)
        d.addCallback(_got_postrepair_results)
        d.addErrback(self.explain_web_error)

        return d

    def test_delete_share(self):
        self.basedir = "deepcheck/MutableChecker/delete_share"
        self.set_up_grid()
        CONTENTS = "a little bit of data"
        d = self.g.clients[0].create_mutable_file(CONTENTS)
        def _stash_and_delete(node):
            self.node = node
            self.fileurl = "uri/" + urllib.quote(node.get_uri())
            self.delete_shares_numbered(node.get_uri(), [0])
        d.addCallback(_stash_and_delete)
        # now make sure the webapi checker notices it
        d.addCallback(lambda ign: self.GET(self.fileurl+"?t=check&verify=false",
                                           method="POST"))
        def _got_results(out):
            self.failUnless("Not Healthy!" in out, out)
            self.failUnless("Unhealthy: best version has only 9 shares (encoding is 3-of-10)" in out, out)
            self.failIf("Corrupt Shares" in out, out)
        d.addCallback(_got_results)

        # now make sure the webapi repairer can fix it
        d.addCallback(lambda ign:
                      self.GET(self.fileurl+"?t=check&verify=false&repair=true",
                               method="POST"))
        def _got_repair_results(out):
            self.failUnless("Repair successful" in out)
        d.addCallback(_got_repair_results)
        d.addCallback(lambda ign: self.GET(self.fileurl+"?t=check&verify=false",
                                           method="POST"))
        def _got_postrepair_results(out):
            self.failIf("Not Healthy!" in out, out)
            self.failUnless("Recoverable Versions: 10*seq" in out)
        d.addCallback(_got_postrepair_results)
        d.addErrback(self.explain_web_error)

        return d


class DeepCheckBase(GridTestMixin, ErrorMixin, StallMixin, ShouldFailMixin):

    def web_json(self, n, **kwargs):
        kwargs["output"] = "json"
        d = self.web(n, "POST", **kwargs)
        d.addCallback(self.decode_json)
        return d

    def decode_json(self, (s,url)):
        try:
            data = simplejson.loads(s)
        except ValueError:
            self.fail("%s: not JSON: '%s'" % (url, s))
        return data

    def parse_streamed_json(self, s):
        for unit in s.split("\n"):
            if not unit:
                # stream should end with a newline, so split returns ""
                continue
            yield simplejson.loads(unit)

    def web(self, n, method="GET", **kwargs):
        # returns (data, url)
        url = (self.client_baseurls[0] + "uri/%s" % urllib.quote(n.get_uri())
               + "?" + "&".join(["%s=%s" % (k,v) for (k,v) in kwargs.items()]))
        d = getPage(url, method=method)
        d.addCallback(lambda data: (data,url))
        return d

    def wait_for_operation(self, ignored, ophandle):
        url = self.client_baseurls[0] + "operations/" + ophandle
        url += "?t=status&output=JSON"
        d = getPage(url)
        def _got(res):
            try:
                data = simplejson.loads(res)
            except ValueError:
                self.fail("%s: not JSON: '%s'" % (url, res))
            if not data["finished"]:
                d = self.stall(delay=1.0)
                d.addCallback(self.wait_for_operation, ophandle)
                return d
            return data
        d.addCallback(_got)
        return d

    def get_operation_results(self, ignored, ophandle, output=None):
        url = self.client_baseurls[0] + "operations/" + ophandle
        url += "?t=status"
        if output:
            url += "&output=" + output
        d = getPage(url)
        def _got(res):
            if output and output.lower() == "json":
                try:
                    return simplejson.loads(res)
                except ValueError:
                    self.fail("%s: not JSON: '%s'" % (url, res))
            return res
        d.addCallback(_got)
        return d

    def slow_web(self, n, output=None, **kwargs):
        # use ophandle=
        handle = base32.b2a(os.urandom(4))
        d = self.web(n, "POST", ophandle=handle, **kwargs)
        d.addCallback(self.wait_for_operation, handle)
        d.addCallback(self.get_operation_results, handle, output=output)
        return d


class DeepCheckWebGood(DeepCheckBase, unittest.TestCase):
    # construct a small directory tree (with one dir, one immutable file, one
    # mutable file, one LIT file, and a loop), and then check/examine it in
    # various ways.

    def set_up_tree(self):
        # 2.9s

        # root
        #   mutable
        #   large
        #   small
        #   small2
        #   loop -> root
        c0 = self.g.clients[0]
        d = c0.create_empty_dirnode()
        def _created_root(n):
            self.root = n
            self.root_uri = n.get_uri()
        d.addCallback(_created_root)
        d.addCallback(lambda ign: c0.create_mutable_file("mutable file contents"))
        d.addCallback(lambda n: self.root.set_node(u"mutable", n))
        def _created_mutable(n):
            self.mutable = n
            self.mutable_uri = n.get_uri()
        d.addCallback(_created_mutable)

        large = upload.Data("Lots of data\n" * 1000, None)
        d.addCallback(lambda ign: self.root.add_file(u"large", large))
        def _created_large(n):
            self.large = n
            self.large_uri = n.get_uri()
        d.addCallback(_created_large)

        small = upload.Data("Small enough for a LIT", None)
        d.addCallback(lambda ign: self.root.add_file(u"small", small))
        def _created_small(n):
            self.small = n
            self.small_uri = n.get_uri()
        d.addCallback(_created_small)

        small2 = upload.Data("Small enough for a LIT too", None)
        d.addCallback(lambda ign: self.root.add_file(u"small2", small2))
        def _created_small2(n):
            self.small2 = n
            self.small2_uri = n.get_uri()
        d.addCallback(_created_small2)

        d.addCallback(lambda ign: self.root.set_node(u"loop", self.root))
        return d

    def check_is_healthy(self, cr, n, where, incomplete=False):
        self.failUnless(ICheckResults.providedBy(cr), where)
        self.failUnless(cr.is_healthy(), where)
        self.failUnlessEqual(cr.get_storage_index(), n.get_storage_index(),
                             where)
        self.failUnlessEqual(cr.get_storage_index_string(),
                             base32.b2a(n.get_storage_index()), where)
        num_servers = len(self.g.all_servers)
        needs_rebalancing = bool( num_servers < 10 )
        if not incomplete:
            self.failUnlessEqual(cr.needs_rebalancing(), needs_rebalancing,
                                 str((where, cr, cr.get_data())))
        d = cr.get_data()
        self.failUnlessEqual(d["count-shares-good"], 10, where)
        self.failUnlessEqual(d["count-shares-needed"], 3, where)
        self.failUnlessEqual(d["count-shares-expected"], 10, where)
        if not incomplete:
            self.failUnlessEqual(d["count-good-share-hosts"], num_servers,
                                 where)
        self.failUnlessEqual(d["count-corrupt-shares"], 0, where)
        self.failUnlessEqual(d["list-corrupt-shares"], [], where)
        if not incomplete:
            self.failUnlessEqual(sorted(d["servers-responding"]),
                                 sorted(self.g.servers_by_id.keys()),
                                 where)
            self.failUnless("sharemap" in d, str((where, d)))
            all_serverids = set()
            for (shareid, serverids) in d["sharemap"].items():
                all_serverids.update(serverids)
            self.failUnlessEqual(sorted(all_serverids),
                                 sorted(self.g.servers_by_id.keys()),
                                 where)

        self.failUnlessEqual(d["count-wrong-shares"], 0, where)
        self.failUnlessEqual(d["count-recoverable-versions"], 1, where)
        self.failUnlessEqual(d["count-unrecoverable-versions"], 0, where)


    def check_and_repair_is_healthy(self, cr, n, where, incomplete=False):
        self.failUnless(ICheckAndRepairResults.providedBy(cr), (where, cr))
        self.failUnless(cr.get_pre_repair_results().is_healthy(), where)
        self.check_is_healthy(cr.get_pre_repair_results(), n, where, incomplete)
        self.failUnless(cr.get_post_repair_results().is_healthy(), where)
        self.check_is_healthy(cr.get_post_repair_results(), n, where, incomplete)
        self.failIf(cr.get_repair_attempted(), where)

    def deep_check_is_healthy(self, cr, num_healthy, where):
        self.failUnless(IDeepCheckResults.providedBy(cr))
        self.failUnlessEqual(cr.get_counters()["count-objects-healthy"],
                             num_healthy, where)

    def deep_check_and_repair_is_healthy(self, cr, num_healthy, where):
        self.failUnless(IDeepCheckAndRepairResults.providedBy(cr), where)
        c = cr.get_counters()
        self.failUnlessEqual(c["count-objects-healthy-pre-repair"],
                             num_healthy, where)
        self.failUnlessEqual(c["count-objects-healthy-post-repair"],
                             num_healthy, where)
        self.failUnlessEqual(c["count-repairs-attempted"], 0, where)

    def test_good(self):
        self.basedir = "deepcheck/DeepCheckWebGood/good"
        self.set_up_grid()
        d = self.set_up_tree()
        d.addCallback(self.do_stats)
        d.addCallback(self.do_web_stream_manifest)
        d.addCallback(self.do_web_stream_check)
        d.addCallback(self.do_test_check_good)
        d.addCallback(self.do_test_web_good)
        d.addCallback(self.do_test_cli_good)
        d.addErrback(self.explain_web_error)
        d.addErrback(self.explain_error)
        return d

    def do_stats(self, ignored):
        d = defer.succeed(None)
        d.addCallback(lambda ign: self.root.start_deep_stats().when_done())
        d.addCallback(self.check_stats_good)
        return d

    def check_stats_good(self, s):
        self.failUnlessEqual(s["count-directories"], 1)
        self.failUnlessEqual(s["count-files"], 4)
        self.failUnlessEqual(s["count-immutable-files"], 1)
        self.failUnlessEqual(s["count-literal-files"], 2)
        self.failUnlessEqual(s["count-mutable-files"], 1)
        # don't check directories: their size will vary
        # s["largest-directory"]
        # s["size-directories"]
        self.failUnlessEqual(s["largest-directory-children"], 5)
        self.failUnlessEqual(s["largest-immutable-file"], 13000)
        # to re-use this function for both the local
        # dirnode.start_deep_stats() and the webapi t=start-deep-stats, we
        # coerce the result into a list of tuples. dirnode.start_deep_stats()
        # returns a list of tuples, but JSON only knows about lists., so
        # t=start-deep-stats returns a list of lists.
        histogram = [tuple(stuff) for stuff in s["size-files-histogram"]]
        self.failUnlessEqual(histogram, [(11, 31, 2),
                                         (10001, 31622, 1),
                                         ])
        self.failUnlessEqual(s["size-immutable-files"], 13000)
        self.failUnlessEqual(s["size-literal-files"], 48)

    def do_web_stream_manifest(self, ignored):
        d = self.web(self.root, method="POST", t="stream-manifest")
        d.addCallback(lambda (output,url):
                      self._check_streamed_manifest(output))
        return d

    def _check_streamed_manifest(self, output):
        units = list(self.parse_streamed_json(output))
        files = [u for u in units if u["type"] in ("file", "directory")]
        assert units[-1]["type"] == "stats"
        stats = units[-1]["stats"]
        self.failUnlessEqual(len(files), 5)
        # [root,mutable,large] are distributed, [small,small2] are not
        self.failUnlessEqual(len([f for f in files
                                  if f["verifycap"] is not None]), 3)
        self.failUnlessEqual(len([f for f in files
                                  if f["verifycap"] is None]), 2)
        self.failUnlessEqual(len([f for f in files
                                  if f["repaircap"] is not None]), 3)
        self.failUnlessEqual(len([f for f in files
                                  if f["repaircap"] is None]), 2)
        self.failUnlessEqual(len([f for f in files
                                  if f["storage-index"] is not None]), 3)
        self.failUnlessEqual(len([f for f in files
                                  if f["storage-index"] is None]), 2)
        # make sure that a mutable file has filecap==repaircap!=verifycap
        mutable = [f for f in files
                   if f["cap"] is not None
                   and f["cap"].startswith("URI:SSK:")][0]
        self.failUnlessEqual(mutable["cap"], self.mutable_uri)
        self.failIfEqual(mutable["cap"], mutable["verifycap"])
        self.failUnlessEqual(mutable["cap"], mutable["repaircap"])
        # for immutable file, verifycap==repaircap!=filecap
        large = [f for f in files
                   if f["cap"] is not None
                   and f["cap"].startswith("URI:CHK:")][0]
        self.failUnlessEqual(large["cap"], self.large_uri)
        self.failIfEqual(large["cap"], large["verifycap"])
        self.failUnlessEqual(large["verifycap"], large["repaircap"])
        self.check_stats_good(stats)

    def do_web_stream_check(self, ignored):
        return
        d = self.web(self.root, t="stream-deep-check")
        def _check(res):
            units = list(self.parse_streamed_json(res))
            files = [u for u in units if u["type"] in ("file", "directory")]
            assert units[-1]["type"] == "stats"
            stats = units[-1]["stats"]
            # ...
        d.addCallback(_check)
        return d

    def do_test_check_good(self, ignored):
        d = defer.succeed(None)
        # check the individual items
        d.addCallback(lambda ign: self.root.check(Monitor()))
        d.addCallback(self.check_is_healthy, self.root, "root")
        d.addCallback(lambda ign: self.mutable.check(Monitor()))
        d.addCallback(self.check_is_healthy, self.mutable, "mutable")
        d.addCallback(lambda ign: self.large.check(Monitor()))
        d.addCallback(self.check_is_healthy, self.large, "large")
        d.addCallback(lambda ign: self.small.check(Monitor()))
        d.addCallback(self.failUnlessEqual, None, "small")
        d.addCallback(lambda ign: self.small2.check(Monitor()))
        d.addCallback(self.failUnlessEqual, None, "small2")

        # and again with verify=True
        d.addCallback(lambda ign: self.root.check(Monitor(), verify=True))
        d.addCallback(self.check_is_healthy, self.root, "root")
        d.addCallback(lambda ign: self.mutable.check(Monitor(), verify=True))
        d.addCallback(self.check_is_healthy, self.mutable, "mutable")
        d.addCallback(lambda ign: self.large.check(Monitor(), verify=True))
        d.addCallback(self.check_is_healthy, self.large, "large", incomplete=True)
        d.addCallback(lambda ign: self.small.check(Monitor(), verify=True))
        d.addCallback(self.failUnlessEqual, None, "small")
        d.addCallback(lambda ign: self.small2.check(Monitor(), verify=True))
        d.addCallback(self.failUnlessEqual, None, "small2")

        # and check_and_repair(), which should be a nop
        d.addCallback(lambda ign: self.root.check_and_repair(Monitor()))
        d.addCallback(self.check_and_repair_is_healthy, self.root, "root")
        d.addCallback(lambda ign: self.mutable.check_and_repair(Monitor()))
        d.addCallback(self.check_and_repair_is_healthy, self.mutable, "mutable")
        #TODO d.addCallback(lambda ign: self.large.check_and_repair(Monitor()))
        #TODO d.addCallback(self.check_and_repair_is_healthy, self.large, "large")
        #TODO d.addCallback(lambda ign: self.small.check_and_repair(Monitor()))
        #TODO d.addCallback(self.failUnlessEqual, None, "small")
        #TODO d.addCallback(lambda ign: self.small2.check_and_repair(Monitor()))
        #TODO d.addCallback(self.failUnlessEqual, None, "small2")

        # check_and_repair(verify=True)
        d.addCallback(lambda ign: self.root.check_and_repair(Monitor(), verify=True))
        d.addCallback(self.check_and_repair_is_healthy, self.root, "root")
        d.addCallback(lambda ign: self.mutable.check_and_repair(Monitor(), verify=True))
        d.addCallback(self.check_and_repair_is_healthy, self.mutable, "mutable")
        #TODO d.addCallback(lambda ign: self.large.check_and_repair(Monitor(), verify=True))
        #TODO d.addCallback(self.check_and_repair_is_healthy, self.large, "large",
        #TODO               incomplete=True)
        #TODO d.addCallback(lambda ign: self.small.check_and_repair(Monitor(), verify=True))
        #TODO d.addCallback(self.failUnlessEqual, None, "small")
        #TODO d.addCallback(lambda ign: self.small2.check_and_repair(Monitor(), verify=True))
        #TODO d.addCallback(self.failUnlessEqual, None, "small2")


        # now deep-check the root, with various verify= and repair= options
        d.addCallback(lambda ign:
                      self.root.start_deep_check().when_done())
        d.addCallback(self.deep_check_is_healthy, 3, "root")
        d.addCallback(lambda ign:
                      self.root.start_deep_check(verify=True).when_done())
        d.addCallback(self.deep_check_is_healthy, 3, "root")
        d.addCallback(lambda ign:
                      self.root.start_deep_check_and_repair().when_done())
        d.addCallback(self.deep_check_and_repair_is_healthy, 3, "root")
        d.addCallback(lambda ign:
                      self.root.start_deep_check_and_repair(verify=True).when_done())
        d.addCallback(self.deep_check_and_repair_is_healthy, 3, "root")

        # and finally, start a deep-check, but then cancel it.
        d.addCallback(lambda ign: self.root.start_deep_check())
        def _checking(monitor):
            monitor.cancel()
            d = monitor.when_done()
            # this should fire as soon as the next dirnode.list finishes.
            # TODO: add a counter to measure how many list() calls are made,
            # assert that no more than one gets to run before the cancel()
            # takes effect.
            def _finished_normally(res):
                self.fail("this was supposed to fail, not finish normally")
            def _cancelled(f):
                f.trap(OperationCancelledError)
            d.addCallbacks(_finished_normally, _cancelled)
            return d
        d.addCallback(_checking)

        return d

    def json_check_is_healthy(self, data, n, where, incomplete=False):

        self.failUnlessEqual(data["storage-index"],
                             base32.b2a(n.get_storage_index()), where)
        self.failUnless("summary" in data, (where, data))
        self.failUnlessEqual(data["summary"].lower(), "healthy",
                             "%s: '%s'" % (where, data["summary"]))
        r = data["results"]
        self.failUnlessEqual(r["healthy"], True, where)
        num_servers = len(self.g.all_servers)
        needs_rebalancing = bool( num_servers < 10 )
        if not incomplete:
            self.failUnlessEqual(r["needs-rebalancing"], needs_rebalancing,
                                 where)
        self.failUnlessEqual(r["count-shares-good"], 10, where)
        self.failUnlessEqual(r["count-shares-needed"], 3, where)
        self.failUnlessEqual(r["count-shares-expected"], 10, where)
        if not incomplete:
            self.failUnlessEqual(r["count-good-share-hosts"], num_servers,
                                 where)
        self.failUnlessEqual(r["count-corrupt-shares"], 0, where)
        self.failUnlessEqual(r["list-corrupt-shares"], [], where)
        if not incomplete:
            self.failUnlessEqual(sorted(r["servers-responding"]),
                                 sorted([idlib.nodeid_b2a(sid)
                                         for sid in self.g.servers_by_id]),
                                 where)
            self.failUnless("sharemap" in r, where)
            all_serverids = set()
            for (shareid, serverids_s) in r["sharemap"].items():
                all_serverids.update(serverids_s)
            self.failUnlessEqual(sorted(all_serverids),
                                 sorted([idlib.nodeid_b2a(sid)
                                         for sid in self.g.servers_by_id]),
                                 where)
        self.failUnlessEqual(r["count-wrong-shares"], 0, where)
        self.failUnlessEqual(r["count-recoverable-versions"], 1, where)
        self.failUnlessEqual(r["count-unrecoverable-versions"], 0, where)

    def json_check_and_repair_is_healthy(self, data, n, where, incomplete=False):
        self.failUnlessEqual(data["storage-index"],
                             base32.b2a(n.get_storage_index()), where)
        self.failUnlessEqual(data["repair-attempted"], False, where)
        self.json_check_is_healthy(data["pre-repair-results"],
                                   n, where, incomplete)
        self.json_check_is_healthy(data["post-repair-results"],
                                   n, where, incomplete)

    def json_full_deepcheck_is_healthy(self, data, n, where):
        self.failUnlessEqual(data["root-storage-index"],
                             base32.b2a(n.get_storage_index()), where)
        self.failUnlessEqual(data["count-objects-checked"], 3, where)
        self.failUnlessEqual(data["count-objects-healthy"], 3, where)
        self.failUnlessEqual(data["count-objects-unhealthy"], 0, where)
        self.failUnlessEqual(data["count-corrupt-shares"], 0, where)
        self.failUnlessEqual(data["list-corrupt-shares"], [], where)
        self.failUnlessEqual(data["list-unhealthy-files"], [], where)
        self.json_check_stats_good(data["stats"], where)

    def json_full_deepcheck_and_repair_is_healthy(self, data, n, where):
        self.failUnlessEqual(data["root-storage-index"],
                             base32.b2a(n.get_storage_index()), where)
        self.failUnlessEqual(data["count-objects-checked"], 3, where)

        self.failUnlessEqual(data["count-objects-healthy-pre-repair"], 3, where)
        self.failUnlessEqual(data["count-objects-unhealthy-pre-repair"], 0, where)
        self.failUnlessEqual(data["count-corrupt-shares-pre-repair"], 0, where)

        self.failUnlessEqual(data["count-objects-healthy-post-repair"], 3, where)
        self.failUnlessEqual(data["count-objects-unhealthy-post-repair"], 0, where)
        self.failUnlessEqual(data["count-corrupt-shares-post-repair"], 0, where)

        self.failUnlessEqual(data["list-corrupt-shares"], [], where)
        self.failUnlessEqual(data["list-remaining-corrupt-shares"], [], where)
        self.failUnlessEqual(data["list-unhealthy-files"], [], where)

        self.failUnlessEqual(data["count-repairs-attempted"], 0, where)
        self.failUnlessEqual(data["count-repairs-successful"], 0, where)
        self.failUnlessEqual(data["count-repairs-unsuccessful"], 0, where)


    def json_check_lit(self, data, n, where):
        self.failUnlessEqual(data["storage-index"], "", where)
        self.failUnlessEqual(data["results"]["healthy"], True, where)

    def json_check_stats_good(self, data, where):
        self.check_stats_good(data)

    def do_test_web_good(self, ignored):
        d = defer.succeed(None)

        # stats
        d.addCallback(lambda ign:
                      self.slow_web(self.root,
                                    t="start-deep-stats", output="json"))
        d.addCallback(self.json_check_stats_good, "deep-stats")

        # check, no verify
        d.addCallback(lambda ign: self.web_json(self.root, t="check"))
        d.addCallback(self.json_check_is_healthy, self.root, "root")
        d.addCallback(lambda ign: self.web_json(self.mutable, t="check"))
        d.addCallback(self.json_check_is_healthy, self.mutable, "mutable")
        d.addCallback(lambda ign: self.web_json(self.large, t="check"))
        d.addCallback(self.json_check_is_healthy, self.large, "large")
        d.addCallback(lambda ign: self.web_json(self.small, t="check"))
        d.addCallback(self.json_check_lit, self.small, "small")
        d.addCallback(lambda ign: self.web_json(self.small2, t="check"))
        d.addCallback(self.json_check_lit, self.small2, "small2")

        # check and verify
        d.addCallback(lambda ign:
                      self.web_json(self.root, t="check", verify="true"))
        d.addCallback(self.json_check_is_healthy, self.root, "root+v")
        d.addCallback(lambda ign:
                      self.web_json(self.mutable, t="check", verify="true"))
        d.addCallback(self.json_check_is_healthy, self.mutable, "mutable+v")
        d.addCallback(lambda ign:
                      self.web_json(self.large, t="check", verify="true"))
        d.addCallback(self.json_check_is_healthy, self.large, "large+v",
                      incomplete=True)
        d.addCallback(lambda ign:
                      self.web_json(self.small, t="check", verify="true"))
        d.addCallback(self.json_check_lit, self.small, "small+v")
        d.addCallback(lambda ign:
                      self.web_json(self.small2, t="check", verify="true"))
        d.addCallback(self.json_check_lit, self.small2, "small2+v")

        # check and repair, no verify
        d.addCallback(lambda ign:
                      self.web_json(self.root, t="check", repair="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.root, "root+r")
        d.addCallback(lambda ign:
                      self.web_json(self.mutable, t="check", repair="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.mutable, "mutable+r")
        d.addCallback(lambda ign:
                      self.web_json(self.large, t="check", repair="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.large, "large+r")
        d.addCallback(lambda ign:
                      self.web_json(self.small, t="check", repair="true"))
        d.addCallback(self.json_check_lit, self.small, "small+r")
        d.addCallback(lambda ign:
                      self.web_json(self.small2, t="check", repair="true"))
        d.addCallback(self.json_check_lit, self.small2, "small2+r")

        # check+verify+repair
        d.addCallback(lambda ign:
                      self.web_json(self.root, t="check", repair="true", verify="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.root, "root+vr")
        d.addCallback(lambda ign:
                      self.web_json(self.mutable, t="check", repair="true", verify="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.mutable, "mutable+vr")
        d.addCallback(lambda ign:
                      self.web_json(self.large, t="check", repair="true", verify="true"))
        d.addCallback(self.json_check_and_repair_is_healthy, self.large, "large+vr", incomplete=True)
        d.addCallback(lambda ign:
                      self.web_json(self.small, t="check", repair="true", verify="true"))
        d.addCallback(self.json_check_lit, self.small, "small+vr")
        d.addCallback(lambda ign:
                      self.web_json(self.small2, t="check", repair="true", verify="true"))
        d.addCallback(self.json_check_lit, self.small2, "small2+vr")

        # now run a deep-check, with various verify= and repair= flags
        d.addCallback(lambda ign:
                      self.slow_web(self.root, t="start-deep-check", output="json"))
        d.addCallback(self.json_full_deepcheck_is_healthy, self.root, "root+d")
        d.addCallback(lambda ign:
                      self.slow_web(self.root, t="start-deep-check", verify="true",
                                    output="json"))
        d.addCallback(self.json_full_deepcheck_is_healthy, self.root, "root+dv")
        d.addCallback(lambda ign:
                      self.slow_web(self.root, t="start-deep-check", repair="true",
                                    output="json"))
        d.addCallback(self.json_full_deepcheck_and_repair_is_healthy, self.root, "root+dr")
        d.addCallback(lambda ign:
                      self.slow_web(self.root, t="start-deep-check", verify="true", repair="true", output="json"))
        d.addCallback(self.json_full_deepcheck_and_repair_is_healthy, self.root, "root+dvr")

        # now look at t=info
        d.addCallback(lambda ign: self.web(self.root, t="info"))
        # TODO: examine the output
        d.addCallback(lambda ign: self.web(self.mutable, t="info"))
        d.addCallback(lambda ign: self.web(self.large, t="info"))
        d.addCallback(lambda ign: self.web(self.small, t="info"))
        d.addCallback(lambda ign: self.web(self.small2, t="info"))

        return d

    def _run_cli(self, argv, stdin=""):
        #print "CLI:", argv
        stdout, stderr = StringIO(), StringIO()
        d = threads.deferToThread(runner.runner, argv, run_by_human=False,
                                  stdin=StringIO(stdin),
                                  stdout=stdout, stderr=stderr)
        def _done(res):
            return stdout.getvalue(), stderr.getvalue()
        d.addCallback(_done)
        return d

    def do_test_cli_good(self, ignored):
        d = defer.succeed(None)
        d.addCallback(lambda ign: self.do_cli_manifest_stream1())
        d.addCallback(lambda ign: self.do_cli_manifest_stream2())
        d.addCallback(lambda ign: self.do_cli_manifest_stream3())
        d.addCallback(lambda ign: self.do_cli_manifest_stream4())
        d.addCallback(lambda ign: self.do_cli_manifest_stream5())
        d.addCallback(lambda ign: self.do_cli_stats1())
        d.addCallback(lambda ign: self.do_cli_stats2())
        return d

    def _check_manifest_storage_index(self, out):
        lines = [l for l in out.split("\n") if l]
        self.failUnlessEqual(len(lines), 3)
        self.failUnless(base32.b2a(self.root.get_storage_index()) in lines)
        self.failUnless(base32.b2a(self.mutable.get_storage_index()) in lines)
        self.failUnless(base32.b2a(self.large.get_storage_index()) in lines)

    def do_cli_manifest_stream1(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["manifest",
                           "--node-directory", basedir,
                           self.root_uri])
        def _check((out,err)):
            self.failUnlessEqual(err, "")
            lines = [l for l in out.split("\n") if l]
            self.failUnlessEqual(len(lines), 5)
            caps = {}
            for l in lines:
                try:
                    cap, path = l.split(None, 1)
                except ValueError:
                    cap = l.strip()
                    path = ""
                caps[cap] = path
            self.failUnless(self.root.get_uri() in caps)
            self.failUnlessEqual(caps[self.root.get_uri()], "")
            self.failUnlessEqual(caps[self.mutable.get_uri()], "mutable")
            self.failUnlessEqual(caps[self.large.get_uri()], "large")
            self.failUnlessEqual(caps[self.small.get_uri()], "small")
            self.failUnlessEqual(caps[self.small2.get_uri()], "small2")
        d.addCallback(_check)
        return d

    def do_cli_manifest_stream2(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["manifest",
                           "--node-directory", basedir,
                           "--raw",
                           self.root_uri])
        def _check((out,err)):
            self.failUnlessEqual(err, "")
            # this should be the same as the POST t=stream-manifest output
            self._check_streamed_manifest(out)
        d.addCallback(_check)
        return d

    def do_cli_manifest_stream3(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["manifest",
                           "--node-directory", basedir,
                           "--storage-index",
                           self.root_uri])
        def _check((out,err)):
            self.failUnlessEqual(err, "")
            self._check_manifest_storage_index(out)
        d.addCallback(_check)
        return d

    def do_cli_manifest_stream4(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["manifest",
                           "--node-directory", basedir,
                           "--verify-cap",
                           self.root_uri])
        def _check((out,err)):
            self.failUnlessEqual(err, "")
            lines = [l for l in out.split("\n") if l]
            self.failUnlessEqual(len(lines), 3)
            self.failUnless(self.root.get_verify_cap().to_string() in lines)
            self.failUnless(self.mutable.get_verify_cap().to_string() in lines)
            self.failUnless(self.large.get_verify_cap().to_string() in lines)
        d.addCallback(_check)
        return d

    def do_cli_manifest_stream5(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["manifest",
                           "--node-directory", basedir,
                           "--repair-cap",
                           self.root_uri])
        def _check((out,err)):
            self.failUnlessEqual(err, "")
            lines = [l for l in out.split("\n") if l]
            self.failUnlessEqual(len(lines), 3)
            self.failUnless(self.root.get_repair_cap().to_string() in lines)
            self.failUnless(self.mutable.get_repair_cap().to_string() in lines)
            self.failUnless(self.large.get_repair_cap().to_string() in lines)
        d.addCallback(_check)
        return d

    def do_cli_stats1(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["stats",
                           "--node-directory", basedir,
                           self.root_uri])
        def _check3((out,err)):
            lines = [l.strip() for l in out.split("\n") if l]
            self.failUnless("count-immutable-files: 1" in lines)
            self.failUnless("count-mutable-files: 1" in lines)
            self.failUnless("count-literal-files: 2" in lines)
            self.failUnless("count-files: 4" in lines)
            self.failUnless("count-directories: 1" in lines)
            self.failUnless("size-immutable-files: 13000    (13.00 kB, 12.70 kiB)" in lines, lines)
            self.failUnless("size-literal-files: 48" in lines)
            self.failUnless("   11-31    : 2    (31 B, 31 B)".strip() in lines)
            self.failUnless("10001-31622 : 1    (31.62 kB, 30.88 kiB)".strip() in lines)
        d.addCallback(_check3)
        return d

    def do_cli_stats2(self):
        basedir = self.get_clientdir(0)
        d = self._run_cli(["stats",
                           "--node-directory", basedir,
                           "--raw",
                           self.root_uri])
        def _check4((out,err)):
            data = simplejson.loads(out)
            self.failUnlessEqual(data["count-immutable-files"], 1)
            self.failUnlessEqual(data["count-immutable-files"], 1)
            self.failUnlessEqual(data["count-mutable-files"], 1)
            self.failUnlessEqual(data["count-literal-files"], 2)
            self.failUnlessEqual(data["count-files"], 4)
            self.failUnlessEqual(data["count-directories"], 1)
            self.failUnlessEqual(data["size-immutable-files"], 13000)
            self.failUnlessEqual(data["size-literal-files"], 48)
            self.failUnless([11,31,2] in data["size-files-histogram"])
            self.failUnless([10001,31622,1] in data["size-files-histogram"])
        d.addCallback(_check4)
        return d


class DeepCheckWebBad(DeepCheckBase, unittest.TestCase):
    def test_bad(self):
        self.basedir = "deepcheck/DeepCheckWebBad/bad"
        self.set_up_grid()
        d = self.set_up_damaged_tree()
        d.addCallback(self.do_check)
        d.addCallback(self.do_deepcheck)
        d.addCallback(self.do_deepcheck_broken)
        d.addCallback(self.do_test_web_bad)
        d.addErrback(self.explain_web_error)
        d.addErrback(self.explain_error)
        return d



    def set_up_damaged_tree(self):
        # 6.4s

        # root
        #   mutable-good
        #   mutable-missing-shares
        #   mutable-corrupt-shares
        #   mutable-unrecoverable
        #   large-good
        #   large-missing-shares
        #   large-corrupt-shares
        #   large-unrecoverable
        # broken
        #   large1-good
        #   subdir-good
        #     large2-good
        #   subdir-unrecoverable
        #     large3-good

        self.nodes = {}

        c0 = self.g.clients[0]
        d = c0.create_empty_dirnode()
        def _created_root(n):
            self.root = n
            self.root_uri = n.get_uri()
        d.addCallback(_created_root)
        d.addCallback(self.create_mangled, "mutable-good")
        d.addCallback(self.create_mangled, "mutable-missing-shares")
        d.addCallback(self.create_mangled, "mutable-corrupt-shares")
        d.addCallback(self.create_mangled, "mutable-unrecoverable")
        d.addCallback(self.create_mangled, "large-good")
        d.addCallback(self.create_mangled, "large-missing-shares")
        d.addCallback(self.create_mangled, "large-corrupt-shares")
        d.addCallback(self.create_mangled, "large-unrecoverable")
        d.addCallback(lambda ignored: c0.create_empty_dirnode())
        d.addCallback(self._stash_node, "broken")
        large1 = upload.Data("Lots of data\n" * 1000 + "large1" + "\n", None)
        d.addCallback(lambda ignored:
                      self.nodes["broken"].add_file(u"large1", large1))
        d.addCallback(lambda ignored:
                      self.nodes["broken"].create_empty_directory(u"subdir-good"))
        large2 = upload.Data("Lots of data\n" * 1000 + "large2" + "\n", None)
        d.addCallback(lambda subdir: subdir.add_file(u"large2-good", large2))
        d.addCallback(lambda ignored:
                      self.nodes["broken"].create_empty_directory(u"subdir-unrecoverable"))
        d.addCallback(self._stash_node, "subdir-unrecoverable")
        large3 = upload.Data("Lots of data\n" * 1000 + "large3" + "\n", None)
        d.addCallback(lambda subdir: subdir.add_file(u"large3-good", large3))
        d.addCallback(lambda ignored:
                      self._delete_most_shares(self.nodes["broken"]))
        return d

    def _stash_node(self, node, name):
        self.nodes[name] = node
        return node

    def create_mangled(self, ignored, name):
        nodetype, mangletype = name.split("-", 1)
        if nodetype == "mutable":
            d = self.g.clients[0].create_mutable_file("mutable file contents")
            d.addCallback(lambda n: self.root.set_node(unicode(name), n))
        elif nodetype == "large":
            large = upload.Data("Lots of data\n" * 1000 + name + "\n", None)
            d = self.root.add_file(unicode(name), large)
        elif nodetype == "small":
            small = upload.Data("Small enough for a LIT", None)
            d = self.root.add_file(unicode(name), small)

        d.addCallback(self._stash_node, name)

        if mangletype == "good":
            pass
        elif mangletype == "missing-shares":
            d.addCallback(self._delete_some_shares)
        elif mangletype == "corrupt-shares":
            d.addCallback(self._corrupt_some_shares)
        else:
            assert mangletype == "unrecoverable"
            d.addCallback(self._delete_most_shares)

        return d

    def _run_cli(self, argv):
        stdout, stderr = StringIO(), StringIO()
        # this can only do synchronous operations
        assert argv[0] == "debug"
        runner.runner(argv, run_by_human=False, stdout=stdout, stderr=stderr)
        return stdout.getvalue()

    def _delete_some_shares(self, node):
        self.delete_shares_numbered(node.get_uri(), [0,1])

    def _corrupt_some_shares(self, node):
        for (shnum, serverid, sharefile) in self.find_shares(node.get_uri()):
            if shnum in (0,1):
                self._run_cli(["debug", "corrupt-share", sharefile])

    def _delete_most_shares(self, node):
        self.delete_shares_numbered(node.get_uri(), range(1,10))


    def check_is_healthy(self, cr, where):
        try:
            self.failUnless(ICheckResults.providedBy(cr), (cr, type(cr), where))
            self.failUnless(cr.is_healthy(), (cr.get_report(), cr.is_healthy(), cr.get_summary(), where))
            self.failUnless(cr.is_recoverable(), where)
            d = cr.get_data()
            self.failUnlessEqual(d["count-recoverable-versions"], 1, where)
            self.failUnlessEqual(d["count-unrecoverable-versions"], 0, where)
            return cr
        except Exception, le:
            le.args = tuple(le.args + (where,))
            raise

    def check_is_missing_shares(self, cr, where):
        self.failUnless(ICheckResults.providedBy(cr), where)
        self.failIf(cr.is_healthy(), where)
        self.failUnless(cr.is_recoverable(), where)
        d = cr.get_data()
        self.failUnlessEqual(d["count-recoverable-versions"], 1, where)
        self.failUnlessEqual(d["count-unrecoverable-versions"], 0, where)
        return cr

    def check_has_corrupt_shares(self, cr, where):
        # by "corrupt-shares" we mean the file is still recoverable
        self.failUnless(ICheckResults.providedBy(cr), where)
        d = cr.get_data()
        self.failIf(cr.is_healthy(), (where, cr))
        self.failUnless(cr.is_recoverable(), where)
        d = cr.get_data()
        self.failUnless(d["count-shares-good"] < 10, where)
        self.failUnless(d["count-corrupt-shares"], where)
        self.failUnless(d["list-corrupt-shares"], where)
        return cr

    def check_is_unrecoverable(self, cr, where):
        self.failUnless(ICheckResults.providedBy(cr), where)
        d = cr.get_data()
        self.failIf(cr.is_healthy(), where)
        self.failIf(cr.is_recoverable(), where)
        self.failUnless(d["count-shares-good"] < d["count-shares-needed"], (d["count-shares-good"], d["count-shares-needed"], where))
        self.failUnlessEqual(d["count-recoverable-versions"], 0, where)
        self.failUnlessEqual(d["count-unrecoverable-versions"], 1, where)
        return cr

    def do_check(self, ignored):
        d = defer.succeed(None)

        # check the individual items, without verification. This will not
        # detect corrupt shares.
        def _check(which, checker):
            d = self.nodes[which].check(Monitor())
            d.addCallback(checker, which + "--check")
            return d

        d.addCallback(lambda ign: _check("mutable-good", self.check_is_healthy))
        d.addCallback(lambda ign: _check("mutable-missing-shares",
                                         self.check_is_missing_shares))
        d.addCallback(lambda ign: _check("mutable-corrupt-shares",
                                         self.check_is_healthy))
        d.addCallback(lambda ign: _check("mutable-unrecoverable",
                                         self.check_is_unrecoverable))
        d.addCallback(lambda ign: _check("large-good", self.check_is_healthy))
        d.addCallback(lambda ign: _check("large-missing-shares",
                                         self.check_is_missing_shares))
        d.addCallback(lambda ign: _check("large-corrupt-shares",
                                         self.check_is_healthy))
        d.addCallback(lambda ign: _check("large-unrecoverable",
                                         self.check_is_unrecoverable))

        # and again with verify=True, which *does* detect corrupt shares.
        def _checkv(which, checker):
            d = self.nodes[which].check(Monitor(), verify=True)
            d.addCallback(checker, which + "--check-and-verify")
            return d

        d.addCallback(lambda ign: _checkv("mutable-good", self.check_is_healthy))
        d.addCallback(lambda ign: _checkv("mutable-missing-shares",
                                         self.check_is_missing_shares))
        d.addCallback(lambda ign: _checkv("mutable-corrupt-shares",
                                         self.check_has_corrupt_shares))
        d.addCallback(lambda ign: _checkv("mutable-unrecoverable",
                                         self.check_is_unrecoverable))
        d.addCallback(lambda ign: _checkv("large-good", self.check_is_healthy))
        d.addCallback(lambda ign: _checkv("large-missing-shares", self.check_is_missing_shares))
        d.addCallback(lambda ign: _checkv("large-corrupt-shares", self.check_has_corrupt_shares))
        d.addCallback(lambda ign: _checkv("large-unrecoverable",
                                         self.check_is_unrecoverable))

        return d

    def do_deepcheck(self, ignored):
        d = defer.succeed(None)

        # now deep-check the root, with various verify= and repair= options
        d.addCallback(lambda ign:
                      self.root.start_deep_check().when_done())
        def _check1(cr):
            self.failUnless(IDeepCheckResults.providedBy(cr))
            c = cr.get_counters()
            self.failUnlessEqual(c["count-objects-checked"], 9)
            self.failUnlessEqual(c["count-objects-healthy"], 5)
            self.failUnlessEqual(c["count-objects-unhealthy"], 4)
            self.failUnlessEqual(c["count-objects-unrecoverable"], 2)
        d.addCallback(_check1)

        d.addCallback(lambda ign:
                      self.root.start_deep_check(verify=True).when_done())
        def _check2(cr):
            self.failUnless(IDeepCheckResults.providedBy(cr))
            c = cr.get_counters()
            self.failUnlessEqual(c["count-objects-checked"], 9)
            self.failUnlessEqual(c["count-objects-healthy"], 3)
            self.failUnlessEqual(c["count-objects-unhealthy"], 6)
            self.failUnlessEqual(c["count-objects-healthy"], 3) # root, mutable good, large good
            self.failUnlessEqual(c["count-objects-unrecoverable"], 2) # mutable unrecoverable, large unrecoverable
        d.addCallback(_check2)

        return d

    def do_deepcheck_broken(self, ignored):
        # deep-check on the broken directory should fail, because of the
        # untraversable subdir
        def _do_deep_check():
            return self.nodes["broken"].start_deep_check().when_done()
        d = self.shouldFail(UnrecoverableFileError, "do_deep_check",
                            "no recoverable versions",
                            _do_deep_check)
        return d

    def json_is_healthy(self, data, where):
        r = data["results"]
        self.failUnless(r["healthy"], where)
        self.failUnless(r["recoverable"], where)
        self.failUnlessEqual(r["count-recoverable-versions"], 1, where)
        self.failUnlessEqual(r["count-unrecoverable-versions"], 0, where)

    def json_is_missing_shares(self, data, where):
        r = data["results"]
        self.failIf(r["healthy"], where)
        self.failUnless(r["recoverable"], where)
        self.failUnlessEqual(r["count-recoverable-versions"], 1, where)
        self.failUnlessEqual(r["count-unrecoverable-versions"], 0, where)

    def json_has_corrupt_shares(self, data, where):
        # by "corrupt-shares" we mean the file is still recoverable
        r = data["results"]
        self.failIf(r["healthy"], where)
        self.failUnless(r["recoverable"], where)
        self.failUnless(r["count-shares-good"] < 10, where)
        self.failUnless(r["count-corrupt-shares"], where)
        self.failUnless(r["list-corrupt-shares"], where)

    def json_is_unrecoverable(self, data, where):
        r = data["results"]
        self.failIf(r["healthy"], where)
        self.failIf(r["recoverable"], where)
        self.failUnless(r["count-shares-good"] < r["count-shares-needed"],
                        where)
        self.failUnlessEqual(r["count-recoverable-versions"], 0, where)
        self.failUnlessEqual(r["count-unrecoverable-versions"], 1, where)

    def do_test_web_bad(self, ignored):
        d = defer.succeed(None)

        # check, no verify
        def _check(which, checker):
            d = self.web_json(self.nodes[which], t="check")
            d.addCallback(checker, which + "--webcheck")
            return d

        d.addCallback(lambda ign: _check("mutable-good",
                                         self.json_is_healthy))
        d.addCallback(lambda ign: _check("mutable-missing-shares",
                                         self.json_is_missing_shares))
        d.addCallback(lambda ign: _check("mutable-corrupt-shares",
                                         self.json_is_healthy))
        d.addCallback(lambda ign: _check("mutable-unrecoverable",
                                         self.json_is_unrecoverable))
        d.addCallback(lambda ign: _check("large-good",
                                         self.json_is_healthy))
        d.addCallback(lambda ign: _check("large-missing-shares",
                                         self.json_is_missing_shares))
        d.addCallback(lambda ign: _check("large-corrupt-shares",
                                         self.json_is_healthy))
        d.addCallback(lambda ign: _check("large-unrecoverable",
                                         self.json_is_unrecoverable))

        # check and verify
        def _checkv(which, checker):
            d = self.web_json(self.nodes[which], t="check", verify="true")
            d.addCallback(checker, which + "--webcheck-and-verify")
            return d

        d.addCallback(lambda ign: _checkv("mutable-good",
                                          self.json_is_healthy))
        d.addCallback(lambda ign: _checkv("mutable-missing-shares",
                                         self.json_is_missing_shares))
        d.addCallback(lambda ign: _checkv("mutable-corrupt-shares",
                                         self.json_has_corrupt_shares))
        d.addCallback(lambda ign: _checkv("mutable-unrecoverable",
                                         self.json_is_unrecoverable))
        d.addCallback(lambda ign: _checkv("large-good",
                                          self.json_is_healthy))
        d.addCallback(lambda ign: _checkv("large-missing-shares", self.json_is_missing_shares))
        d.addCallback(lambda ign: _checkv("large-corrupt-shares", self.json_has_corrupt_shares))
        d.addCallback(lambda ign: _checkv("large-unrecoverable",
                                         self.json_is_unrecoverable))

        return d

class Large(DeepCheckBase, unittest.TestCase):
    def test_lots_of_lits(self):
        self.basedir = "deepcheck/Large/lots_of_lits"
        self.set_up_grid()
        # create the following directory structure:
        #  root/
        #   subdir/
        #    000-large (CHK)
        #    001-small (LIT)
        #    002-small
        #    ...
        #    399-small
        # then do a deepcheck and make sure it doesn't cause a
        # Deferred-tail-recursion stack overflow

        COUNT = 400
        c0 = self.g.clients[0]
        d = c0.create_empty_dirnode()
        self.stash = {}
        def _created_root(n):
            self.root = n
            return n
        d.addCallback(_created_root)
        d.addCallback(lambda root: root.create_empty_directory(u"subdir"))
        def _add_children(subdir_node):
            self.subdir_node = subdir_node
            kids = []
            for i in range(1, COUNT):
                litnode = LiteralFileURI("%03d-data" % i)
                kids.append( (u"%03d-small" % i, litnode) )
            return subdir_node.set_children(kids)
        d.addCallback(_add_children)
        up = upload.Data("large enough for CHK" * 100, "")
        d.addCallback(lambda ign: self.subdir_node.add_file(u"0000-large", up))

        def _start_deepcheck(ignored):
            return self.web(self.root, method="POST", t="stream-deep-check")
        d.addCallback(_start_deepcheck)
        def _check( (output, url) ):
            units = list(self.parse_streamed_json(output))
            self.failUnlessEqual(len(units), 2+COUNT+1)
        d.addCallback(_check)

        return d

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