services/api/test/unit/collection_test.rb

   1 # Copyright (C) The Arvados Authors. All rights reserved.
   2 #
   3 # SPDX-License-Identifier: AGPL-3.0
   4
   5 require 'test_helper'
   6 require 'sweep_trashed_objects'
   7
   8 class CollectionTest < ActiveSupport::TestCase
   9   include DbCurrentTime
  10
  11   def create_collection name, enc=nil
  12     txt = ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:#{name}.txt\n"
  13     txt.force_encoding(enc) if enc
  14     return Collection.create(manifest_text: txt)
  15   end
  16
  17   test 'accept ASCII manifest_text' do
  18     act_as_system_user do
  19       c = create_collection 'foo', Encoding::US_ASCII
  20       assert c.valid?
  21     end
  22   end
  23
  24   test 'accept UTF-8 manifest_text' do
  25     act_as_system_user do
  26       c = create_collection "f\xc3\x98\xc3\x98", Encoding::UTF_8
  27       assert c.valid?
  28     end
  29   end
  30
  31   test 'refuse manifest_text with invalid UTF-8 byte sequence' do
  32     act_as_system_user do
  33       c = create_collection "f\xc8o", Encoding::UTF_8
  34       assert !c.valid?
  35       assert_equal [:manifest_text], c.errors.messages.keys
  36       assert_match(/UTF-8/, c.errors.messages[:manifest_text].first)
  37     end
  38   end
  39
  40   test 'refuse manifest_text with non-UTF-8 encoding' do
  41     act_as_system_user do
  42       c = create_collection "f\xc8o", Encoding::ASCII_8BIT
  43       assert !c.valid?
  44       assert_equal [:manifest_text], c.errors.messages.keys
  45       assert_match(/UTF-8/, c.errors.messages[:manifest_text].first)
  46     end
  47   end
  48
  49   [
  50     ". 0:0:foo.txt",
  51     ". d41d8cd98f00b204e9800998ecf8427e foo.txt",
  52     "d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt",
  53     ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt",
  54   ].each do |manifest_text|
  55     test "create collection with invalid manifest text #{manifest_text} and expect error" do
  56       act_as_system_user do
  57         c = Collection.create(manifest_text: manifest_text)
  58         assert !c.valid?
  59       end
  60     end
  61   end
  62
  63   [
  64     nil,
  65     "",
  66     ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt\n",
  67   ].each do |manifest_text|
  68     test "create collection with valid manifest text #{manifest_text.inspect} and expect success" do
  69       act_as_system_user do
  70         c = Collection.create(manifest_text: manifest_text)
  71         assert c.valid?
  72       end
  73     end
  74   end
  75
  76   [
  77     ". 0:0:foo.txt",
  78     ". d41d8cd98f00b204e9800998ecf8427e foo.txt",
  79     "d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt",
  80     ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt",
  81   ].each do |manifest_text|
  82     test "update collection with invalid manifest text #{manifest_text} and expect error" do
  83       act_as_system_user do
  84         c = create_collection 'foo', Encoding::US_ASCII
  85         assert c.valid?
  86
  87         c.update_attribute 'manifest_text', manifest_text
  88         assert !c.valid?
  89       end
  90     end
  91   end
  92
  93   [
  94     nil,
  95     "",
  96     ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo.txt\n",
  97   ].each do |manifest_text|
  98     test "update collection with valid manifest text #{manifest_text.inspect} and expect success" do
  99       act_as_system_user do
 100         c = create_collection 'foo', Encoding::US_ASCII
 101         assert c.valid?
 102
 103         c.update_attribute 'manifest_text', manifest_text
 104         assert c.valid?
 105       end
 106     end
 107   end
 108
 109   test 'create and update collection and verify file_names' do
 110     act_as_system_user do
 111       c = create_collection 'foo', Encoding::US_ASCII
 112       assert c.valid?
 113       created_file_names = c.file_names
 114       assert created_file_names
 115       assert_match(/foo.txt/, c.file_names)
 116
 117       c.update_attribute 'manifest_text', ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo2.txt\n"
 118       assert_not_equal created_file_names, c.file_names
 119       assert_match(/foo2.txt/, c.file_names)
 120     end
 121   end
 122
 123   [
 124     [2**8, false],
 125     [2**18, true],
 126   ].each do |manifest_size, allow_truncate|
 127     test "create collection with manifest size #{manifest_size} with allow_truncate=#{allow_truncate},
 128           and not expect exceptions even on very large manifest texts" do
 129       # file_names has a max size, hence there will be no errors even on large manifests
 130       act_as_system_user do
 131         manifest_text = ''
 132         index = 0
 133         while manifest_text.length < manifest_size
 134           manifest_text += "./blurfl d41d8cd98f00b204e9800998ecf8427e+0 0:0:veryverylongfilename000000000000#{index}.txt\n"
 135           index += 1
 136         end
 137         manifest_text += "./laststreamname d41d8cd98f00b204e9800998ecf8427e+0 0:0:veryverylastfilename.txt\n"
 138         c = Collection.create(manifest_text: manifest_text)
 139
 140         assert c.valid?
 141         assert c.file_names
 142         assert_match(/veryverylongfilename0000000000001.txt/, c.file_names)
 143         assert_match(/veryverylongfilename0000000000002.txt/, c.file_names)
 144         if not allow_truncate
 145           assert_match(/veryverylastfilename/, c.file_names)
 146           assert_match(/laststreamname/, c.file_names)
 147         end
 148       end
 149     end
 150   end
 151
 152   test "full text search for collections" do
 153     # file_names column does not get populated when fixtures are loaded, hence setup test data
 154     act_as_system_user do
 155       Collection.create(manifest_text: ". acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:foo\n")
 156       Collection.create(manifest_text: ". 37b51d194a7513e45b56f6524f2d51f2+3 0:3:bar\n")
 157       Collection.create(manifest_text: ". 85877ca2d7e05498dd3d109baf2df106+95+A3a4e26a366ee7e4ed3e476ccf05354761be2e4ae@545a9920 0:95:file_in_subdir1\n./subdir2/subdir3 2bbc341c702df4d8f42ec31f16c10120+64+A315d7e7bad2ce937e711fc454fae2d1194d14d64@545a9920 0:32:file1.txt 32:32:file2.txt\n./subdir2/subdir3/subdir4 2bbc341c702df4d8f42ec31f16c10120+64+A315d7e7bad2ce937e711fc454fae2d1194d14d64@545a9920 0:32:file3.txt 32:32:file4.txt\n")
 158     end
 159
 160     [
 161       ['foo', true],
 162       ['foo bar', false],                     # no collection matching both
 163       ['foo&bar', false],                     # no collection matching both
 164       ['foo|bar', true],                      # works only no spaces between the words
 165       ['Gnu public', true],                   # both prefixes found, though not consecutively
 166       ['Gnu&public', true],                   # both prefixes found, though not consecutively
 167       ['file4', true],                        # prefix match
 168       ['file4.txt', true],                    # whole string match
 169       ['filex', false],                       # no such prefix
 170       ['subdir', true],                       # prefix matches
 171       ['subdir2', true],
 172       ['subdir2/', true],
 173       ['subdir2/subdir3', true],
 174       ['subdir2/subdir3/subdir4', true],
 175       ['subdir2 file4', true],                # look for both prefixes
 176       ['subdir4', false],                     # not a prefix match
 177     ].each do |search_filter, expect_results|
 178       search_filters = search_filter.split.each {|s| s.concat(':*')}.join('&')
 179       results = Collection.where("#{Collection.full_text_tsvector} @@ to_tsquery(?)",
 180                                  "#{search_filters}")
 181       if expect_results
 182         refute_empty results
 183       else
 184         assert_empty results
 185       end
 186     end
 187   end
 188
 189   test 'portable data hash with missing size hints' do
 190     [[". d41d8cd98f00b204e9800998ecf8427e+0+Bar 0:0:x\n",
 191       ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:x\n"],
 192      [". d41d8cd98f00b204e9800998ecf8427e+Foo 0:0:x\n",
 193       ". d41d8cd98f00b204e9800998ecf8427e 0:0:x\n"],
 194      [". d41d8cd98f00b204e9800998ecf8427e 0:0:x\n",
 195       ". d41d8cd98f00b204e9800998ecf8427e 0:0:x\n"],
 196     ].each do |unportable, portable|
 197       c = Collection.new(manifest_text: unportable)
 198       assert c.valid?
 199       assert_equal(Digest::MD5.hexdigest(portable)+"+#{portable.length}",
 200                    c.portable_data_hash)
 201     end
 202   end
 203
 204   pdhmanifest = ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:x\n"
 205   pdhmd5 = Digest::MD5.hexdigest pdhmanifest
 206   [[true, nil],
 207    [true, pdhmd5],
 208    [true, pdhmd5+'+12345'],
 209    [true, pdhmd5+'+'+pdhmanifest.length.to_s],
 210    [true, pdhmd5+'+12345+Foo'],
 211    [true, pdhmd5+'+Foo'],
 212    [false, Digest::MD5.hexdigest(pdhmanifest.strip)],
 213    [false, Digest::MD5.hexdigest(pdhmanifest.strip)+'+'+pdhmanifest.length.to_s],
 214    [false, pdhmd5[0..30]],
 215    [false, pdhmd5[0..30]+'z'],
 216    [false, pdhmd5[0..24]+'000000000'],
 217    [false, pdhmd5[0..24]+'000000000+0']].each do |isvalid, pdh|
 218     test "portable_data_hash #{pdh.inspect} valid? == #{isvalid}" do
 219       c = Collection.new manifest_text: pdhmanifest, portable_data_hash: pdh
 220       assert_equal isvalid, c.valid?, c.errors.full_messages.to_s
 221     end
 222   end
 223
 224   test "storage_classes_desired cannot be empty" do
 225     act_as_user users(:active) do
 226       c = collections(:collection_owned_by_active)
 227       c.update_attributes storage_classes_desired: ["hot"]
 228       assert_equal ["hot"], c.storage_classes_desired
 229       assert_raise ArvadosModel::InvalidStateTransitionError do
 230         c.update_attributes storage_classes_desired: []
 231       end
 232     end
 233   end
 234
 235   test "storage classes lists should only contain non-empty strings" do
 236     c = collections(:storage_classes_desired_default_unconfirmed)
 237     act_as_user users(:admin) do
 238       assert c.update_attributes(storage_classes_desired: ["default", "a_string"],
 239                                  storage_classes_confirmed: ["another_string"])
 240       [
 241         ["storage_classes_desired", ["default", 42]],
 242         ["storage_classes_confirmed", [{the_answer: 42}]],
 243         ["storage_classes_desired", ["default", ""]],
 244         ["storage_classes_confirmed", [""]],
 245       ].each do |attr, val|
 246         assert_raise ArvadosModel::InvalidStateTransitionError do
 247           assert c.update_attributes({attr => val})
 248         end
 249       end
 250     end
 251   end
 252
 253   test "storage_classes_confirmed* can be set by admin user" do
 254     c = collections(:storage_classes_desired_default_unconfirmed)
 255     act_as_user users(:admin) do
 256       assert c.update_attributes(storage_classes_confirmed: ["default"],
 257                                  storage_classes_confirmed_at: Time.now)
 258     end
 259   end
 260
 261   test "storage_classes_confirmed* cannot be set by non-admin user" do
 262     act_as_user users(:active) do
 263       c = collections(:storage_classes_desired_default_unconfirmed)
 264       # Cannot set just one at a time.
 265       assert_raise ArvadosModel::PermissionDeniedError do
 266         c.update_attributes storage_classes_confirmed: ["default"]
 267       end
 268       c.reload
 269       assert_raise ArvadosModel::PermissionDeniedError do
 270         c.update_attributes storage_classes_confirmed_at: Time.now
 271       end
 272       # Cannot set bot at once, either.
 273       c.reload
 274       assert_raise ArvadosModel::PermissionDeniedError do
 275         assert c.update_attributes(storage_classes_confirmed: ["default"],
 276                                    storage_classes_confirmed_at: Time.now)
 277       end
 278     end
 279   end
 280
 281   test "storage_classes_confirmed* can be cleared (but only together) by non-admin user" do
 282     act_as_user users(:active) do
 283       c = collections(:storage_classes_desired_default_confirmed_default)
 284       # Cannot clear just one at a time.
 285       assert_raise ArvadosModel::PermissionDeniedError do
 286         c.update_attributes storage_classes_confirmed: []
 287       end
 288       c.reload
 289       assert_raise ArvadosModel::PermissionDeniedError do
 290         c.update_attributes storage_classes_confirmed_at: nil
 291       end
 292       # Can clear both at once.
 293       c.reload
 294       assert c.update_attributes(storage_classes_confirmed: [],
 295                                  storage_classes_confirmed_at: nil)
 296     end
 297   end
 298
 299   [0, 2, 4, nil].each do |ask|
 300     test "set replication_desired to #{ask.inspect}" do
 301       Rails.configuration.default_collection_replication = 2
 302       act_as_user users(:active) do
 303         c = collections(:replication_undesired_unconfirmed)
 304         c.update_attributes replication_desired: ask
 305         assert_equal ask, c.replication_desired
 306       end
 307     end
 308   end
 309
 310   test "replication_confirmed* can be set by admin user" do
 311     c = collections(:replication_desired_2_unconfirmed)
 312     act_as_user users(:admin) do
 313       assert c.update_attributes(replication_confirmed: 2,
 314                                  replication_confirmed_at: Time.now)
 315     end
 316   end
 317
 318   test "replication_confirmed* cannot be set by non-admin user" do
 319     act_as_user users(:active) do
 320       c = collections(:replication_desired_2_unconfirmed)
 321       # Cannot set just one at a time.
 322       assert_raise ArvadosModel::PermissionDeniedError do
 323         c.update_attributes replication_confirmed: 1
 324       end
 325       assert_raise ArvadosModel::PermissionDeniedError do
 326         c.update_attributes replication_confirmed_at: Time.now
 327       end
 328       # Cannot set both at once, either.
 329       assert_raise ArvadosModel::PermissionDeniedError do
 330         c.update_attributes(replication_confirmed: 1,
 331                             replication_confirmed_at: Time.now)
 332       end
 333     end
 334   end
 335
 336   test "replication_confirmed* can be cleared (but only together) by non-admin user" do
 337     act_as_user users(:active) do
 338       c = collections(:replication_desired_2_confirmed_2)
 339       # Cannot clear just one at a time.
 340       assert_raise ArvadosModel::PermissionDeniedError do
 341         c.update_attributes replication_confirmed: nil
 342       end
 343       c.reload
 344       assert_raise ArvadosModel::PermissionDeniedError do
 345         c.update_attributes replication_confirmed_at: nil
 346       end
 347       # Can clear both at once.
 348       c.reload
 349       assert c.update_attributes(replication_confirmed: nil,
 350                                  replication_confirmed_at: nil)
 351     end
 352   end
 353
 354   test "clear replication_confirmed* when introducing a new block in manifest" do
 355     c = collections(:replication_desired_2_confirmed_2)
 356     act_as_user users(:active) do
 357       assert c.update_attributes(manifest_text: collections(:user_agreement).signed_manifest_text)
 358       assert_nil c.replication_confirmed
 359       assert_nil c.replication_confirmed_at
 360     end
 361   end
 362
 363   test "don't clear replication_confirmed* when just renaming a file" do
 364     c = collections(:replication_desired_2_confirmed_2)
 365     act_as_user users(:active) do
 366       new_manifest = c.signed_manifest_text.sub(':bar', ':foo')
 367       assert c.update_attributes(manifest_text: new_manifest)
 368       assert_equal 2, c.replication_confirmed
 369       assert_not_nil c.replication_confirmed_at
 370     end
 371   end
 372
 373   test "don't clear replication_confirmed* when just deleting a data block" do
 374     c = collections(:replication_desired_2_confirmed_2)
 375     act_as_user users(:active) do
 376       new_manifest = c.signed_manifest_text
 377       new_manifest.sub!(/ \S+:bar/, '')
 378       new_manifest.sub!(/ acbd\S+/, '')
 379
 380       # Confirm that we did just remove a block from the manifest (if
 381       # not, this test would pass without testing the relevant case):
 382       assert_operator new_manifest.length+40, :<, c.signed_manifest_text.length
 383
 384       assert c.update_attributes(manifest_text: new_manifest)
 385       assert_equal 2, c.replication_confirmed
 386       assert_not_nil c.replication_confirmed_at
 387     end
 388   end
 389
 390   test 'signature expiry does not exceed trash_at' do
 391     act_as_user users(:active) do
 392       t0 = db_current_time
 393       c = Collection.create!(manifest_text: ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:x\n", name: 'foo')
 394       c.update_attributes! trash_at: (t0 + 1.hours)
 395       c.reload
 396       sig_exp = /\+A[0-9a-f]{40}\@([0-9]+)/.match(c.signed_manifest_text)[1].to_i
 397       assert_operator sig_exp.to_i, :<=, (t0 + 1.hours).to_i
 398     end
 399   end
 400
 401   test 'far-future expiry date cannot be used to circumvent configured permission ttl' do
 402     act_as_user users(:active) do
 403       c = Collection.create!(manifest_text: ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:x\n",
 404                              name: 'foo',
 405                              trash_at: db_current_time + 1.years)
 406       sig_exp = /\+A[0-9a-f]{40}\@([0-9]+)/.match(c.signed_manifest_text)[1].to_i
 407       expect_max_sig_exp = db_current_time.to_i + Rails.configuration.blob_signature_ttl
 408       assert_operator c.trash_at.to_i, :>, expect_max_sig_exp
 409       assert_operator sig_exp.to_i, :<=, expect_max_sig_exp
 410     end
 411   end
 412
 413   test "create collection with properties" do
 414     act_as_system_user do
 415       c = Collection.create(manifest_text: ". acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:foo\n",
 416                             properties: {'property_1' => 'value_1'})
 417       assert c.valid?
 418       assert_equal 'value_1', c.properties['property_1']
 419     end
 420   end
 421
 422   test 'create, delete, recreate collection with same name and owner' do
 423     act_as_user users(:active) do
 424       # create collection with name
 425       c = Collection.create(manifest_text: '',
 426                             name: "test collection name")
 427       assert c.valid?
 428       uuid = c.uuid
 429
 430       c = Collection.readable_by(current_user).where(uuid: uuid)
 431       assert_not_empty c, 'Should be able to find live collection'
 432
 433       # mark collection as expired
 434       c.first.update_attributes!(trash_at: Time.new.strftime("%Y-%m-%d"))
 435       c = Collection.readable_by(current_user).where(uuid: uuid)
 436       assert_empty c, 'Should not be able to find expired collection'
 437
 438       # recreate collection with the same name
 439       c = Collection.create(manifest_text: '',
 440                             name: "test collection name")
 441       assert c.valid?
 442     end
 443   end
 444
 445   test 'trash_at cannot be set too far in the past' do
 446     act_as_user users(:active) do
 447       t0 = db_current_time
 448       c = Collection.create!(manifest_text: '', name: 'foo')
 449       c.update_attributes! trash_at: (t0 - 2.weeks)
 450       c.reload
 451       assert_operator c.trash_at, :>, t0
 452     end
 453   end
 454
 455   now = Time.now
 456   [['trash-to-delete interval negative',
 457     :collection_owned_by_active,
 458     {trash_at: now+2.weeks, delete_at: now},
 459     {state: :invalid}],
 460    ['now-to-delete interval short',
 461     :collection_owned_by_active,
 462     {trash_at: now+3.days, delete_at: now+7.days},
 463     {state: :trash_future}],
 464    ['now-to-delete interval short, trash=delete',
 465     :collection_owned_by_active,
 466     {trash_at: now+3.days, delete_at: now+3.days},
 467     {state: :trash_future}],
 468    ['trash-to-delete interval ok',
 469     :collection_owned_by_active,
 470     {trash_at: now, delete_at: now+15.days},
 471     {state: :trash_now}],
 472    ['trash-to-delete interval short, but far enough in future',
 473     :collection_owned_by_active,
 474     {trash_at: now+13.days, delete_at: now+15.days},
 475     {state: :trash_future}],
 476    ['trash by setting is_trashed bool',
 477     :collection_owned_by_active,
 478     {is_trashed: true},
 479     {state: :trash_now}],
 480    ['trash in future by setting just trash_at',
 481     :collection_owned_by_active,
 482     {trash_at: now+1.week},
 483     {state: :trash_future}],
 484    ['trash in future by setting trash_at and delete_at',
 485     :collection_owned_by_active,
 486     {trash_at: now+1.week, delete_at: now+4.weeks},
 487     {state: :trash_future}],
 488    ['untrash by clearing is_trashed bool',
 489     :expired_collection,
 490     {is_trashed: false},
 491     {state: :not_trash}],
 492   ].each do |test_name, fixture_name, updates, expect|
 493     test test_name do
 494       act_as_user users(:active) do
 495         min_exp = (db_current_time +
 496                    Rails.configuration.blob_signature_ttl.seconds)
 497         if fixture_name == :expired_collection
 498           # Fixture-finder shorthand doesn't find trashed collections
 499           # because they're not in the default scope.
 500           c = Collection.find_by_uuid('zzzzz-4zz18-mto52zx1s7sn3ih')
 501         else
 502           c = collections(fixture_name)
 503         end
 504         updates_ok = c.update_attributes(updates)
 505         expect_valid = expect[:state] != :invalid
 506         assert_equal expect_valid, updates_ok, c.errors.full_messages.to_s
 507         case expect[:state]
 508         when :invalid
 509           refute c.valid?
 510         when :trash_now
 511           assert c.is_trashed
 512           assert_not_nil c.trash_at
 513           assert_operator c.trash_at, :<=, db_current_time
 514           assert_not_nil c.delete_at
 515           assert_operator c.delete_at, :>=, min_exp
 516         when :trash_future
 517           refute c.is_trashed
 518           assert_not_nil c.trash_at
 519           assert_operator c.trash_at, :>, db_current_time
 520           assert_not_nil c.delete_at
 521           assert_operator c.delete_at, :>=, c.trash_at
 522           # Currently this minimum interval is needed to prevent early
 523           # garbage collection:
 524           assert_operator c.delete_at, :>=, min_exp
 525         when :not_trash
 526           refute c.is_trashed
 527           assert_nil c.trash_at
 528           assert_nil c.delete_at
 529         else
 530           raise "bad expect[:state]==#{expect[:state].inspect} in test case"
 531         end
 532       end
 533     end
 534   end
 535
 536   test 'default trash interval > blob signature ttl' do
 537     Rails.configuration.default_trash_lifetime = 86400 * 21 # 3 weeks
 538     start = db_current_time
 539     act_as_user users(:active) do
 540       c = Collection.create!(manifest_text: '', name: 'foo')
 541       c.update_attributes!(trash_at: start + 86400.seconds)
 542       assert_operator c.delete_at, :>=, start + (86400*22).seconds
 543       assert_operator c.delete_at, :<, start + (86400*22 + 30).seconds
 544       c.destroy
 545
 546       c = Collection.create!(manifest_text: '', name: 'foo')
 547       c.update_attributes!(is_trashed: true)
 548       assert_operator c.delete_at, :>=, start + (86400*21).seconds
 549     end
 550   end
 551
 552   test "find_all_for_docker_image resolves names that look like hashes" do
 553     coll_list = Collection.
 554       find_all_for_docker_image('a' * 64, nil, [users(:active)])
 555     coll_uuids = coll_list.map(&:uuid)
 556     assert_includes(coll_uuids, collections(:docker_image).uuid)
 557   end
 558
 559   test "move collections to trash in SweepTrashedObjects" do
 560     c = collections(:trashed_on_next_sweep)
 561     refute_empty Collection.where('uuid=? and is_trashed=false', c.uuid)
 562     assert_raises(ActiveRecord::RecordNotUnique) do
 563       act_as_user users(:active) do
 564         Collection.create!(owner_uuid: c.owner_uuid,
 565                            name: c.name)
 566       end
 567     end
 568     SweepTrashedObjects.sweep_now
 569     c = Collection.where('uuid=? and is_trashed=true', c.uuid).first
 570     assert c
 571     act_as_user users(:active) do
 572       assert Collection.create!(owner_uuid: c.owner_uuid,
 573                                 name: c.name)
 574     end
 575   end
 576
 577   test "delete collections in SweepTrashedObjects" do
 578     uuid = 'zzzzz-4zz18-3u1p5umicfpqszp' # deleted_on_next_sweep
 579     assert_not_empty Collection.where(uuid: uuid)
 580     SweepTrashedObjects.sweep_now
 581     assert_empty Collection.where(uuid: uuid)
 582   end
 583
 584   test "delete referring links in SweepTrashedObjects" do
 585     uuid = collections(:trashed_on_next_sweep).uuid
 586     act_as_system_user do
 587       Link.create!(head_uuid: uuid,
 588                    tail_uuid: system_user_uuid,
 589                    link_class: 'whatever',
 590                    name: 'something')
 591     end
 592     past = db_current_time
 593     Collection.where(uuid: uuid).
 594       update_all(is_trashed: true, trash_at: past, delete_at: past)
 595     assert_not_empty Collection.where(uuid: uuid)
 596     SweepTrashedObjects.sweep_now
 597     assert_empty Collection.where(uuid: uuid)
 598   end
 599 end