File: builtin_provider_unittest.cc

package info (click to toggle)
chromium 139.0.7258.127-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 6,122,156 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (478 lines) | stat: -rw-r--r-- 20,104 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "components/omnibox/browser/builtin_provider.h"

#include <stddef.h>

#include <array>
#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "base/format_macros.h"
#include "base/strings/strcat.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "components/omnibox/browser/autocomplete_input.h"
#include "components/omnibox/browser/history_url_provider.h"
#include "components/omnibox/browser/mock_autocomplete_provider_client.h"
#include "components/omnibox/browser/test_scheme_classifier.h"
#include "components/search_engines/search_engines_test_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/metrics_proto/omnibox_event.pb.h"
#include "third_party/metrics_proto/omnibox_focus_type.pb.h"
#include "url/gurl.h"

namespace {

const char kEmbedderAboutScheme[] = "chrome";
const char16_t kEmbedderAboutScheme16[] = u"chrome";
const char16_t kDefaultURL1[] = u"chrome://default1/";
const char16_t kDefaultURL2[] = u"chrome://default2/";
const char16_t kDefaultURL3[] = u"chrome://foo/";
const char16_t kSubpageURL[] = u"chrome://subpage/";

// Arbitrary host constants, chosen to start with the letters "b" and "me".
const char16_t kHostBar[] = u"bar";
const char16_t kHostMedia[] = u"media";
const char16_t kHostMemory[] = u"memory";
const char16_t kHostMemoryInternals[] = u"memory-internals";
const char16_t kHostSubpage[] = u"subpage";

const char16_t kSubpageOne[] = u"one";
const char16_t kSubpageTwo[] = u"two";
const char16_t kSubpageThree[] = u"three";

class FakeAutocompleteProviderClient : public MockAutocompleteProviderClient {
 public:
  FakeAutocompleteProviderClient() = default;
  FakeAutocompleteProviderClient(const FakeAutocompleteProviderClient&) =
      delete;
  FakeAutocompleteProviderClient& operator=(
      const FakeAutocompleteProviderClient&) = delete;

  std::string GetEmbedderRepresentationOfAboutScheme() const override {
    return kEmbedderAboutScheme;
  }

  std::vector<std::u16string> GetBuiltinURLs() override {
    std::vector<std::u16string> urls;
    urls.push_back(kHostBar);
    urls.push_back(kHostMedia);
    // The URL that is a superstring of the other is intentionally placed first
    // here. The provider makes no guarantees that shorter URLs will appear
    // first.
    urls.push_back(kHostMemoryInternals);
    urls.push_back(kHostMemory);
    urls.push_back(kHostSubpage);

    std::u16string prefix = base::StrCat({kHostSubpage, u"/"});
    urls.push_back(prefix + kSubpageOne);
    urls.push_back(prefix + kSubpageTwo);
    urls.push_back(prefix + kSubpageThree);
    return urls;
  }

  std::vector<std::u16string> GetBuiltinsToProvideAsUserTypes() override {
    std::vector<std::u16string> urls;
    urls.push_back(kDefaultURL1);
    urls.push_back(kDefaultURL2);
    urls.push_back(kDefaultURL3);
    return urls;
  }
};

}  // namespace

class BuiltinProviderTest : public testing::Test {
 public:
  BuiltinProviderTest(const BuiltinProviderTest&) = delete;
  BuiltinProviderTest& operator=(const BuiltinProviderTest&) = delete;

 protected:
  struct TestData {
    const std::u16string input;
    const std::vector<GURL> output;
  };

  BuiltinProviderTest() = default;
  ~BuiltinProviderTest() override = default;

  void SetUp() override {
    client_ = std::make_unique<FakeAutocompleteProviderClient>();
    provider_ = new BuiltinProvider(client_.get());
  }
  void TearDown() override { provider_ = nullptr; }

  void RunTest(const TestData cases[], size_t num_cases) {
    ACMatches matches;
    for (size_t i = 0; i < num_cases; ++i) {
      SCOPED_TRACE(base::StringPrintf(
          "case %" PRIuS ": %s", i, base::UTF16ToUTF8(cases[i].input).c_str()));
      AutocompleteInput input(cases[i].input, metrics::OmniboxEventProto::OTHER,
                              TestSchemeClassifier());
      input.set_prevent_inline_autocomplete(true);
      provider_->Start(input, false);
      EXPECT_TRUE(provider_->done());
      matches = provider_->matches();
      ASSERT_EQ(cases[i].output.size(), matches.size());
      for (size_t j = 0; j < cases[i].output.size(); ++j) {
        EXPECT_EQ(cases[i].output[j], matches[j].destination_url);
      }
    }
  }

  search_engines::SearchEnginesTestEnvironment search_engines_test_environment_;
  std::unique_ptr<FakeAutocompleteProviderClient> client_;
  scoped_refptr<BuiltinProvider> provider_;
};

TEST_F(BuiltinProviderTest, TypingScheme) {
  const std::u16string kAbout = url::kAboutScheme16;
  const std::u16string kEmbedder = kEmbedderAboutScheme16;
  const std::u16string kSeparator1 = u":";
  const std::u16string kSeparator2 = u":/";
  const std::u16string kSeparator3 = url::kStandardSchemeSeparator16;

  // These default URLs should correspond with those in BuiltinProvider::Start.
  const GURL kURL1(kDefaultURL1);
  const GURL kURL2(kDefaultURL2);
  const GURL kURL3(kDefaultURL3);

  TestData typing_scheme_cases[] = {
      // Typing an unrelated scheme should give nothing.
      {u"h", {}},
      {u"http", {}},
      {u"file", {}},
      {u"abouz", {}},
      {u"aboutt", {}},
      {u"aboutt:", {}},
      {u"chroma", {}},
      {u"chromee", {}},
      {u"chromee:", {}},

      // Typing a portion of about:// should give the default urls.
      {kAbout.substr(0, 1), {kURL1, kURL2, kURL3}},
      {u"A", {kURL1, kURL2, kURL3}},
      {kAbout, {kURL1, kURL2, kURL3}},
      {kAbout + kSeparator1, {kURL1, kURL2, kURL3}},
      {kAbout + kSeparator2, {kURL1, kURL2, kURL3}},
      {kAbout + kSeparator3, {kURL1, kURL2, kURL3}},
      {u"aBoUT://", {kURL1, kURL2, kURL3}},

      // Typing a portion of the embedder scheme should give the default urls.
      {kEmbedder.substr(0, 1), {kURL1, kURL2, kURL3}},
      {u"C", {kURL1, kURL2, kURL3}},
      {kEmbedder, {kURL1, kURL2, kURL3}},
      {kEmbedder + kSeparator1, {kURL1, kURL2, kURL3}},
      {kEmbedder + kSeparator2, {kURL1, kURL2, kURL3}},
      {kEmbedder + kSeparator3, {kURL1, kURL2, kURL3}},
      {u"ChRoMe://", {kURL1, kURL2, kURL3}},
  };

  RunTest(typing_scheme_cases, std::size(typing_scheme_cases));
}

TEST_F(BuiltinProviderTest, NonEmbedderURLs) {
  TestData test_cases[] = {
      // Typing an unrelated scheme should give nothing.
      {u"g@rb@g3", {}},
      {u"www.google.com", {}},
      {u"http:www.google.com", {}},
      {u"http://www.google.com", {}},
      {u"file:filename", {}},
      {u"scheme:", {}},
      {u"scheme://", {}},
      {u"scheme://host", {}},
      {u"scheme:host/path?query#ref", {}},
      {u"scheme://host/path?query#ref", {}},
  };

  RunTest(test_cases, std::size(test_cases));
}

TEST_F(BuiltinProviderTest, EmbedderProvidedURLs) {
  const std::u16string kAbout = url::kAboutScheme16;
  const std::u16string kEmbedder = kEmbedderAboutScheme16;
  const std::u16string kSep1 = u":";
  const std::u16string kSep2 = u":/";
  const std::u16string kSep3 = url::kStandardSchemeSeparator16;

  // The following hosts are arbitrary, chosen so that they all start with the
  // letters "me".
  const std::u16string kHostM1 = kHostMedia;
  const std::u16string kHostM2 = kHostMemoryInternals;
  const std::u16string kHostM3 = kHostMemory;
  const GURL kURLM1(kEmbedder + kSep3 + kHostM1);
  const GURL kURLM2(kEmbedder + kSep3 + kHostM2);
  const GURL kURLM3(kEmbedder + kSep3 + kHostM3);

  TestData test_cases[] = {
      // Typing an about URL with an unknown host should give nothing.
      {kAbout + kSep1 + u"host", {}},
      {kAbout + kSep2 + u"host", {}},
      {kAbout + kSep3 + u"host", {}},

      // Typing an embedder URL with an unknown host should give nothing.
      {kEmbedder + kSep1 + u"host", {}},
      {kEmbedder + kSep2 + u"host", {}},
      {kEmbedder + kSep3 + u"host", {}},

      // Typing an about URL should provide matching URLs.
      {kAbout + kSep1 + kHostM1.substr(0, 1), {kURLM1, kURLM2, kURLM3}},
      {kAbout + kSep2 + kHostM1.substr(0, 2), {kURLM1, kURLM2, kURLM3}},
      {kAbout + kSep3 + kHostM1.substr(0, 3), {kURLM1}},
      {kAbout + kSep3 + kHostM2.substr(0, 3), {kURLM2, kURLM3}},
      {kAbout + kSep3 + kHostM1, {kURLM1}},
      {kAbout + kSep2 + kHostM2, {kURLM2}},
      {kAbout + kSep2 + kHostM3, {kURLM2, kURLM3}},

      // Typing an embedder URL should provide matching URLs.
      {kEmbedder + kSep1 + kHostM1.substr(0, 1), {kURLM1, kURLM2, kURLM3}},
      {kEmbedder + kSep2 + kHostM1.substr(0, 2), {kURLM1, kURLM2, kURLM3}},
      {kEmbedder + kSep3 + kHostM1.substr(0, 3), {kURLM1}},
      {kEmbedder + kSep3 + kHostM2.substr(0, 3), {kURLM2, kURLM3}},
      {kEmbedder + kSep3 + kHostM1, {kURLM1}},
      {kEmbedder + kSep2 + kHostM2, {kURLM2}},
      {kEmbedder + kSep2 + kHostM3, {kURLM2, kURLM3}},
  };

  RunTest(test_cases, std::size(test_cases));
}

TEST_F(BuiltinProviderTest, AboutBlank) {
  const std::u16string kAbout = url::kAboutScheme16;
  const std::u16string kEmbedder = kEmbedderAboutScheme16;
  const std::u16string kAboutBlank = url::kAboutBlankURL16;
  const std::u16string kBlank = u"blank";
  const std::u16string kSeparator1 = url::kStandardSchemeSeparator16;
  const std::u16string kSeparator2 = u":///";
  const std::u16string kSeparator3 = u";///";

  const GURL kURLBar = GURL(kEmbedder + kSeparator1 + kHostBar);
  const GURL kURLBlank(kAboutBlank);

  TestData about_blank_cases[] = {
      // Typing an about:blank prefix should yield about:blank, among other
      // URLs.
      {kAboutBlank.substr(0, 7), {kURLBlank, kURLBar}},
      {kAboutBlank.substr(0, 8), {kURLBlank}},

      // Using any separator that is supported by fixup should yield
      // about:blank.
      // For now, BuiltinProvider does not suggest url-what-you-typed matches
      // for
      // for about:blank; check "about:blan" and "about;blan" substrings
      // instead.
      {kAbout + kSeparator2.substr(0, 1) + kBlank.substr(0, 4), {kURLBlank}},
      {kAbout + kSeparator2.substr(0, 2) + kBlank, {kURLBlank}},
      {kAbout + kSeparator2.substr(0, 3) + kBlank, {kURLBlank}},
      {kAbout + kSeparator2 + kBlank, {kURLBlank}},
      {kAbout + kSeparator3.substr(0, 1) + kBlank.substr(0, 4), {kURLBlank}},
      {kAbout + kSeparator3.substr(0, 2) + kBlank, {kURLBlank}},
      {kAbout + kSeparator3.substr(0, 3) + kBlank, {kURLBlank}},
      {kAbout + kSeparator3 + kBlank, {kURLBlank}},

      // Using the embedder scheme should not yield about:blank.
      {kEmbedder + kSeparator1.substr(0, 1) + kBlank, {}},
      {kEmbedder + kSeparator1.substr(0, 2) + kBlank, {}},
      {kEmbedder + kSeparator1.substr(0, 3) + kBlank, {}},
      {kEmbedder + kSeparator1 + kBlank, {}},

      // Adding trailing text should not yield about:blank.
      {kAboutBlank + u"/", {}},
      {kAboutBlank + u"/p", {}},
      {kAboutBlank + u"x", {}},
      {kAboutBlank + u"?q", {}},
      {kAboutBlank + u"#r", {}},

      // Interrupting "blank" with conflicting text should not yield
      // about:blank.
      {kAboutBlank.substr(0, 9) + u"/", {}},
      {kAboutBlank.substr(0, 9) + u"/p", {}},
      {kAboutBlank.substr(0, 9) + u"x", {}},
      {kAboutBlank.substr(0, 9) + u"?q", {}},
      {kAboutBlank.substr(0, 9) + u"#r", {}},
  };

  RunTest(about_blank_cases, std::size(about_blank_cases));
}

TEST_F(BuiltinProviderTest, DoesNotSupportMatchesOnFocus) {
  AutocompleteInput input(u"chrome://m", metrics::OmniboxEventProto::OTHER,
                          TestSchemeClassifier());
  input.set_focus_type(metrics::OmniboxFocusType::INTERACTION_FOCUS);
  provider_->Start(input, false);
  EXPECT_TRUE(provider_->matches().empty());
}

TEST_F(BuiltinProviderTest, Subpages) {
  const std::u16string kSubpage = kSubpageURL;
  const std::u16string kPageOne = kSubpageOne;
  const std::u16string kPageTwo = kSubpageTwo;
  const std::u16string kPageThree = kSubpageThree;
  const GURL kURLOne(kSubpage + kPageOne);
  const GURL kURLTwo(kSubpage + kPageTwo);
  const GURL kURLThree(kSubpage + kPageThree);

  TestData settings_subpage_cases[] = {
      // Typing the settings path should show settings and the first two
      // subpages.
      {kSubpage, {GURL(kSubpage), kURLOne, kURLTwo}},

      // Typing a subpage path should return the appropriate results.
      {kSubpage + kPageTwo.substr(0, 1), {kURLTwo, kURLThree}},
      {kSubpage + kPageTwo.substr(0, 2), {kURLTwo}},
      {kSubpage + kPageThree.substr(0, kPageThree.length() - 1), {kURLThree}},
      {kSubpage + kPageOne, {kURLOne}},
      {kSubpage + kPageTwo, {kURLTwo}},
  };

  RunTest(settings_subpage_cases, std::size(settings_subpage_cases));
}

TEST_F(BuiltinProviderTest, Inlining) {
  const std::u16string kAbout = url::kAboutScheme16;
  const std::u16string kEmbedder = kEmbedderAboutScheme16;
  const std::u16string kSep = url::kStandardSchemeSeparator16;
  const std::u16string kHostM = kHostMedia;
  const std::u16string kHostB = kHostBar;
  const std::u16string kHostMem = kHostMemory;
  const std::u16string kHostMemInt = kHostMemoryInternals;
  const std::u16string kHostSub = kHostSubpage;
  const std::u16string kHostSubTwo =
      base::StrCat({kHostSubpage, u"/", kSubpageTwo});

  struct InliningTestData {
    const std::u16string input;
    const std::u16string expected_inline_autocompletion;
  };
  auto cases = std::to_array<InliningTestData>({
      // Typing along "about://media" should not yield an inline autocompletion
      // until the completion is unique.  We don't bother checking every single
      // character before the first "m" is typed.
      {kAbout.substr(0, 2), std::u16string()},
      {kAbout, std::u16string()},
      {kAbout + kSep, std::u16string()},
      {kAbout + kSep + kHostM.substr(0, 1), std::u16string()},
      {kAbout + kSep + kHostM.substr(0, 2), std::u16string()},
      {kAbout + kSep + kHostM.substr(0, 3), kHostM.substr(3)},
      {kAbout + kSep + kHostM.substr(0, 4), kHostM.substr(4)},

      // Ditto with "chrome://media".
      {kEmbedder.substr(0, 2), std::u16string()},
      {kEmbedder, std::u16string()},
      {kEmbedder + kSep, std::u16string()},
      {kEmbedder + kSep + kHostM.substr(0, 1), std::u16string()},
      {kEmbedder + kSep + kHostM.substr(0, 2), std::u16string()},
      {kEmbedder + kSep + kHostM.substr(0, 3), kHostM.substr(3)},
      {kEmbedder + kSep + kHostM.substr(0, 4), kHostM.substr(4)},

      // The same rules should apply to "about://bar" and "chrome://bar".
      // At the "a" from "bar" in "about://bar", Chrome should be willing to
      // start inlining.  (Before that it conflicts with about:blank.)  At
      // the "b" from "bar" in "chrome://bar", Chrome should be willing to
      // start inlining.  (There is no chrome://blank page.)
      {kAbout + kSep + kHostB.substr(0, 1), std::u16string()},
      {kAbout + kSep + kHostB.substr(0, 2), kHostB.substr(2)},
      {kAbout + kSep + kHostB.substr(0, 3), kHostB.substr(3)},
      {kEmbedder + kSep + kHostB.substr(0, 1), kHostB.substr(1)},
      {kEmbedder + kSep + kHostB.substr(0, 2), kHostB.substr(2)},
      {kEmbedder + kSep + kHostB.substr(0, 3), kHostB.substr(3)},

      // The same rules should apply to "about://memory" and "chrome://memory".
      // At the second "m", an inline autocompletion should be offered. Although
      // this could also be completed with "memory-internals", "memory" is
      // shorter
      // and prefix of the other candidate, so it is preferred.
      {kAbout + kSep + kHostMem.substr(0, 1), std::u16string()},
      {kAbout + kSep + kHostMem.substr(0, 2), std::u16string()},
      {kAbout + kSep + kHostMem.substr(0, 3), kHostMem.substr(3)},
      {kAbout + kSep + kHostMem.substr(0, 4), kHostMem.substr(4)},
      {kEmbedder + kSep + kHostMem.substr(0, 1), std::u16string()},
      {kEmbedder + kSep + kHostMem.substr(0, 2), std::u16string()},
      {kEmbedder + kSep + kHostMem.substr(0, 3), kHostMem.substr(3)},
      {kEmbedder + kSep + kHostMem.substr(0, 4), kHostMem.substr(4)},

      // After "memory-", then "memory-internals" should be inlined.
      {kAbout + kSep + kHostMemInt.substr(0, 7), kHostMemInt.substr(7)},
      {kEmbedder + kSep + kHostMemInt.substr(0, 7), kHostMemInt.substr(7)},

      // Similarly, inline "about://subpage" and "chrome://subpage" even though
      // other, longer completions (e.g. "chrome://subpage/one") are available.
      {kAbout + kSep + kHostSub.substr(0, 1), kHostSub.substr(1)},
      {kAbout + kSep + kHostSub.substr(0, 2), kHostSub.substr(2)},
      {kAbout + kSep + kHostSub.substr(0, 3), kHostSub.substr(3)},
      {kEmbedder + kSep + kHostSub.substr(0, 1), kHostSub.substr(1)},
      {kEmbedder + kSep + kHostSub.substr(0, 2), kHostSub.substr(2)},
      {kEmbedder + kSep + kHostSub.substr(0, 3), kHostSub.substr(3)},

      // Once the user input distinctly matches a longer subpage
      // ("chrome://subpage/two"), inline that. This doesn't happen until the
      // user
      // enters "w" so that it it can be distinguished from
      // "chrome://subpage/three".
      {kAbout + kSep + kHostSubTwo.substr(0, 8), std::u16string()},
      {kAbout + kSep + kHostSubTwo.substr(0, 9), std::u16string()},
      {kAbout + kSep + kHostSubTwo.substr(0, 10), kHostSubTwo.substr(10)},
      {kEmbedder + kSep + kHostSubTwo.substr(0, 8), std::u16string()},
      {kEmbedder + kSep + kHostSubTwo.substr(0, 9), std::u16string()},
      {kEmbedder + kSep + kHostSubTwo.substr(0, 10), kHostSubTwo.substr(10)},

      // Typing something non-match after an inline autocompletion should stop
      // the inline autocompletion from appearing.
      {kAbout + kSep + kHostB.substr(0, 2) + u"/", std::u16string()},
      {kAbout + kSep + kHostB.substr(0, 2) + u"a", std::u16string()},
      {kAbout + kSep + kHostB.substr(0, 2) + u"+", std::u16string()},
  });

  ACMatches matches;
  for (size_t i = 0; i < std::size(cases); ++i) {
    SCOPED_TRACE(base::StringPrintf("case %" PRIuS ": %s", i,
                                    base::UTF16ToUTF8(cases[i].input).c_str()));
    AutocompleteInput input(cases[i].input, metrics::OmniboxEventProto::OTHER,
                            TestSchemeClassifier());
    provider_->Start(input, false);
    EXPECT_TRUE(provider_->done());
    matches = provider_->matches();
    if (cases[i].expected_inline_autocompletion.empty()) {
      // If we're not expecting an inline autocompletion, make sure that no
      // matches are allowed_to_be_default.
      for (size_t j = 0; j < matches.size(); ++j) {
        EXPECT_LT(matches[j].relevance,
                  HistoryURLProvider::kScoreForWhatYouTypedResult);
        EXPECT_FALSE(matches[j].allowed_to_be_default_match);
      }
    } else {
      // If we are expecting an inline autocompletion, confirm that one and only
      // one of the matches is marked as allowed_to_be_default and that its
      // inline autocompletion is equal to the expected inline autocompletion.
      ASSERT_FALSE(matches.empty());
      size_t default_match_index = matches.size();
      for (size_t j = 0; j < matches.size(); ++j) {
        // If we already found a match that is allowed_to_be_default, ensure
        // that subsequent matches are NOT marked as allowed_to_be_default.
        if (default_match_index < matches.size()) {
          ASSERT_FALSE(matches[j].allowed_to_be_default_match)
              << "Only one match should be allowed to be the default match.";
        } else if (matches[j].allowed_to_be_default_match) {
          default_match_index = j;
        }
      }
      ASSERT_LT(default_match_index, matches.size())
          << "One match should be marked as allowed to be default but none is.";
      EXPECT_GT(matches[default_match_index].relevance,
                HistoryURLProvider::kScoreForWhatYouTypedResult);
      EXPECT_EQ(cases[i].expected_inline_autocompletion,
                matches[default_match_index].inline_autocompletion);
    }
  }
}