summaryrefslogtreecommitdiff
path: root/test/map/map.test.cpp
blob: f563aaa548c3ae589df55f8e539dda13810916d2 (plain)
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
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
#include <mbgl/test/util.hpp>
#include <mbgl/test/stub_file_source.hpp>
#include <mbgl/test/fake_file_source.hpp>
#include <mbgl/test/fixture_log_observer.hpp>

#include <mbgl/map/map.hpp>
#include <mbgl/map/backend_scope.hpp>
#include <mbgl/gl/headless_backend.hpp>
#include <mbgl/gl/offscreen_view.hpp>
#include <mbgl/gl/context.hpp>
#include <mbgl/util/default_thread_pool.hpp>
#include <mbgl/sprite/sprite_image.hpp>
#include <mbgl/storage/network_status.hpp>
#include <mbgl/storage/default_file_source.hpp>
#include <mbgl/storage/online_file_source.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/run_loop.hpp>
#include <mbgl/util/async_task.hpp>
#include <mbgl/style/layers/background_layer.hpp>
#include <mbgl/util/color.hpp>

using namespace mbgl;
using namespace mbgl::style;
using namespace std::literals::string_literals;

class BackendTest : public HeadlessBackend {
public:
    BackendTest() : HeadlessBackend(test::sharedDisplay()) {}

    void onDidFailLoadingMap(std::exception_ptr) final {
        if (didFailLoadingMapCallback) {
            didFailLoadingMapCallback();
        }
    }

    void onDidFinishLoadingStyle() final {
        if (didFinishLoadingStyleCallback) {
            didFinishLoadingStyleCallback();
        }
    }

    std::function<void()> didFailLoadingMapCallback;
    std::function<void()> didFinishLoadingStyleCallback;
};

struct MapTest {
    util::RunLoop runLoop;
    BackendTest backend;
    BackendScope scope { backend };
    OffscreenView view { backend.getContext() };
    StubFileSource fileSource;
    ThreadPool threadPool { 4 };
};

TEST(Map, LatLngBehavior) {
    MapTest test;
    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);

    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));

    map.setLatLngZoom({ 1, 1 }, 0);
    auto latLng1 = map.getLatLng();

    map.setLatLng({ 1, 1 });
    auto latLng2 = map.getLatLng();

    ASSERT_DOUBLE_EQ(latLng1.latitude(), latLng2.latitude());
    ASSERT_DOUBLE_EQ(latLng1.longitude(), latLng2.longitude());
}

TEST(Map, LatLngBoundsToCamera) {
    MapTest test;
    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);

    map.setLatLngZoom({ 40.712730, -74.005953 }, 16.0);

    LatLngBounds bounds = LatLngBounds::hull({15.68169,73.499857}, {53.560711, 134.77281});

    CameraOptions virtualCamera = map.cameraForLatLngBounds(bounds, {});
    ASSERT_TRUE(bounds.contains(*virtualCamera.center));
}

TEST(Map, CameraToLatLngBounds) {
    MapTest test;
    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);

    map.setLatLngZoom({ 45, 90 }, 16);

    LatLngBounds bounds = LatLngBounds::hull(
            map.latLngForPixel({}),
            map.latLngForPixel({ double(map.getSize().width), double(map.getSize().height) }));

    CameraOptions camera = map.getCameraOptions({});

    ASSERT_EQ(bounds, map.latLngBoundsForCamera(camera));

    // Map::cameraForLatLngBounds only sets zoom and center.
    CameraOptions virtualCamera = map.cameraForLatLngBounds(bounds, {});
    ASSERT_NEAR(*camera.zoom, *virtualCamera.zoom, 1e-7);
    ASSERT_NEAR(camera.center->latitude(), virtualCamera.center->latitude(), 1e-7);
    ASSERT_NEAR(camera.center->longitude(), virtualCamera.center->longitude(), 1e-7);
}

TEST(Map, Offline) {
    MapTest test;
    DefaultFileSource fileSource(":memory:", ".");

    auto expiredItem = [] (const std::string& path) {
        Response response;
        response.data = std::make_shared<std::string>(util::read_file("test/fixtures/map/offline/"s + path));
        response.expires = Timestamp{ Seconds(0) };
        return response;
    };

    const std::string prefix = "http://127.0.0.1:3000/";
    fileSource.put(Resource::style(prefix + "style.json"), expiredItem("style.json"));
    fileSource.put(Resource::source(prefix + "streets.json"), expiredItem("streets.json"));
    fileSource.put(Resource::spriteJSON(prefix + "sprite", 1.0), expiredItem("sprite.json"));
    fileSource.put(Resource::spriteImage(prefix + "sprite", 1.0), expiredItem("sprite.png"));
    fileSource.put(Resource::tile(prefix + "{z}-{x}-{y}.vector.pbf", 1.0, 0, 0, 0, Tileset::Scheme::XYZ), expiredItem("0-0-0.vector.pbf"));
    fileSource.put(Resource::glyphs(prefix + "{fontstack}/{range}.pbf", {{"Helvetica"}}, {0, 255}), expiredItem("glyph.pbf"));
    NetworkStatus::Set(NetworkStatus::Status::Offline);

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL(prefix + "style.json");

    test::checkImage("test/fixtures/map/offline",
                     test::render(map, test.view),
                     0.0015,
                     0.1);

    NetworkStatus::Set(NetworkStatus::Status::Online);
}

TEST(Map, SetStyleInvalidJSON) {
    MapTest test;

    Log::setObserver(std::make_unique<FixtureLogObserver>());

    bool fail = false;
    test.backend.didFailLoadingMapCallback = [&]() {
        fail = true;
    };

    {
        Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool,
                MapMode::Still);
        map.setStyleJSON("invalid");
    }

    EXPECT_TRUE(fail);

    auto observer = Log::removeObserver();
    auto flo = dynamic_cast<FixtureLogObserver*>(observer.get());
    EXPECT_EQ(1u, flo->count({ EventSeverity::Error, Event::ParseStyle, -1,
        "Failed to parse style: 0 - Invalid value." }));
    auto unchecked = flo->unchecked();
    EXPECT_TRUE(unchecked.empty()) << unchecked;
}

TEST(Map, SetStyleInvalidURL) {
    MapTest test;

    test.fileSource.styleResponse = [] (const Resource&) {
        Response response;
        response.error = std::make_unique<Response::Error>(
            Response::Error::Reason::Other,
            "Failed by the test case");
        return response;
    };

    test.backend.didFailLoadingMapCallback = [&]() {
        test.runLoop.stop();
    };

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("mapbox://bar");

    test.runLoop.run();
}

TEST(Map, DoubleStyleLoad) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON("");
    map.setStyleJSON("");
}

TEST(Map, StyleFresh) {
    // The map should not revalidate fresh styles.

    MapTest test;
    FakeFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("mapbox://styles/test");
    EXPECT_EQ(1u, fileSource.requests.size());

    Response response;
    response.data = std::make_shared<std::string>(util::read_file("test/fixtures/api/empty.json"));
    response.expires = Timestamp::max();

    fileSource.respond(Resource::Style, response);
    EXPECT_EQ(0u, fileSource.requests.size());
}

TEST(Map, StyleExpired) {
    // The map should allow expired styles to be revalidated, so long as no mutations are made.

    using namespace std::chrono_literals;

    MapTest test;
    FakeFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("mapbox://styles/test");
    EXPECT_EQ(1u, fileSource.requests.size());

    Response response;
    response.data = std::make_shared<std::string>(util::read_file("test/fixtures/api/empty.json"));
    response.expires = util::now() - 1h;

    fileSource.respond(Resource::Style, response);
    EXPECT_EQ(1u, fileSource.requests.size());

    map.addLayer(std::make_unique<style::BackgroundLayer>("bg"));
    EXPECT_EQ(1u, fileSource.requests.size());

    fileSource.respond(Resource::Style, response);
    EXPECT_EQ(0u, fileSource.requests.size());
    EXPECT_NE(nullptr, map.getLayer("bg"));
}

TEST(Map, StyleExpiredWithAnnotations) {
    // Adding an annotation should not prevent revalidation of an expired style.

    using namespace std::chrono_literals;

    MapTest test;
    FakeFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("mapbox://styles/test");
    EXPECT_EQ(1u, fileSource.requests.size());

    Response response;
    response.data = std::make_shared<std::string>(util::read_file("test/fixtures/api/empty.json"));
    response.expires = util::now() - 1h;

    fileSource.respond(Resource::Style, response);
    EXPECT_EQ(1u, fileSource.requests.size());

    map.addAnnotation(LineAnnotation { LineString<double> {{ { 0, 0 }, { 10, 10 } }} });
    EXPECT_EQ(1u, fileSource.requests.size());

    fileSource.respond(Resource::Style, response);
    EXPECT_EQ(1u, fileSource.requests.size());
}

TEST(Map, StyleEarlyMutation) {
    // An early mutation should not prevent the initial style load.

    MapTest test;
    FakeFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("mapbox://styles/test");
    map.addLayer(std::make_unique<style::BackgroundLayer>("bg"));

    Response response;
    response.data = std::make_shared<std::string>(util::read_file("test/fixtures/api/water.json"));
    fileSource.respond(Resource::Style, response);

    EXPECT_EQ(0u, fileSource.requests.size());
    EXPECT_NE(nullptr, map.getLayer("water"));
}

TEST(Map, StyleLoadedSignal) {
    MapTest test;
    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);

    // The map should emit a signal on style loaded
    bool emitted = false;
    test.backend.didFinishLoadingStyleCallback = [&]() {
        emitted = true;
    };
    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));
    EXPECT_TRUE(emitted);

    // But not when the style couldn't be parsed
    emitted = false;
    map.setStyleJSON("invalid");
    EXPECT_FALSE(emitted);
}

// Test for https://github.com/mapbox/mapbox-gl-native/issues/7902
TEST(Map, TEST_REQUIRES_SERVER(StyleNetworkErrorRetry)) {
    MapTest test;
    OnlineFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("http://127.0.0.1:3000/style-fail-once-500");

    test.backend.didFinishLoadingStyleCallback = [&]() {
        test.runLoop.stop();
    };

    test.runLoop.run();
}

TEST(Map, TEST_REQUIRES_SERVER(StyleNotFound)) {
    MapTest test;
    OnlineFileSource fileSource;

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleURL("http://127.0.0.1:3000/style-fail-once-404");

    using namespace std::chrono_literals;
    util::Timer timer;

    // Not found errors should not trigger a retry like other errors.
    test.backend.didFinishLoadingStyleCallback = [&]() {
        FAIL() << "Should not retry on not found!";
    };

    test.backend.didFailLoadingMapCallback = [&]() {
        timer.start(Milliseconds(1100), 0s, [&] {
            test.runLoop.stop();
        });
    };

    test.runLoop.run();

    // Should also not retry if the response has cache headers.
    map.setStyleURL("http://127.0.0.1:3000/style-fail-once-404-cache");
    test.runLoop.run();
}

TEST(Map, AddLayer) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));

    auto layer = std::make_unique<BackgroundLayer>("background");
    layer->setBackgroundColor({ { 1, 0, 0, 1 } });
    map.addLayer(std::move(layer));

    test::checkImage("test/fixtures/map/add_layer", test::render(map, test.view));
}

TEST(Map, WithoutVAOExtension) {
    MapTest test;

    test.backend.getContext().disableVAOExtension = true;

#ifdef MBGL_ASSET_ZIP
    // Regenerate with `cd test/fixtures/api/ && zip -r assets.zip assets/`
    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets.zip");
#else
    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets");
#endif

    Map map(test.backend, test.view.getSize(), 1, fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON(util::read_file("test/fixtures/api/water.json"));

    test::checkImage("test/fixtures/map/no_vao", test::render(map, test.view), 0.002);
}

TEST(Map, RemoveLayer) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));

    auto layer = std::make_unique<BackgroundLayer>("background");
    layer->setBackgroundColor({{ 1, 0, 0, 1 }});
    map.addLayer(std::move(layer));
    map.removeLayer("background");

    test::checkImage("test/fixtures/map/remove_layer", test::render(map, test.view));
}

TEST(Map, DisabledSources) {
    MapTest test;

    // Always load the same image tile for raster layers.
    test.fileSource.response = [] (const Resource& res) -> optional<Response> {
        if (res.url == "asset://tile.png") {
            Response response;
            response.data = std::make_shared<std::string>(
                util::read_file("test/fixtures/map/disabled_layers/tile.png"));
            return {std::move(response)};
        }
        return {};
    };

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setZoom(1);

    // This stylesheet has two raster layers, one that starts at zoom 1, the other at zoom 0.
    // We first render a map at zoom level 1, which should show both layers (both are "visible" due
    // to an opacity of 0.5). Then, we are zooming back out to a zoom level of 0.5 and rerender.
    // The "raster1" layer should not be visible anymore since it has minzoom 1, while "raster2"
    // should still be there. Both layers have a distinct color through "raster-hue-rotate".
    map.setStyleJSON(R"STYLE(
{
  "version": 8,
  "name": "Test",
  "sources": {
    "raster": {
      "type": "raster",
      "tiles": [ "asset://tile.png" ],
      "tileSize": 256
    }
  },
  "layers": [{
    "id": "background",
    "type": "background",
    "paint": {
      "background-color": "white"
    }
  }, {
    "id": "raster1",
    "type": "raster",
    "source": "raster",
    "minzoom": 0
  }, {
    "id": "raster2",
    "type": "raster",
    "source": "raster",
    "minzoom": 1,
    "paint": {
      "raster-hue-rotate": 180
    }
  }]
}
)STYLE");

    test::checkImage("test/fixtures/map/disabled_layers/first", test::render(map, test.view));
    map.setZoom(0.5);
    test::checkImage("test/fixtures/map/disabled_layers/second", test::render(map, test.view));
}

TEST(Map, Classes) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));

    EXPECT_FALSE(map.getTransitionOptions().duration);

    auto duration = mbgl::Duration(mbgl::Milliseconds(300));
    map.setTransitionOptions({ duration });
    EXPECT_EQ(map.getTransitionOptions().duration, duration);

    map.addClass("test");
    EXPECT_TRUE(map.hasClass("test"));

    map.removeClass("test");
    EXPECT_TRUE(map.getClasses().empty());

    std::vector<std::string> classes = { "foo", "bar" };
    map.setClasses(classes);
    EXPECT_FALSE(map.hasClass("test"));
    EXPECT_TRUE(map.hasClass("foo"));
    EXPECT_TRUE(map.hasClass("bar"));

    // Does nothing - same style JSON.
    map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"));
    EXPECT_TRUE(map.hasClass("foo"));
    EXPECT_EQ(map.getTransitionOptions().duration, duration);

    map.setStyleJSON(util::read_file("test/fixtures/api/water.json"));
    EXPECT_TRUE(map.getClasses().empty());
    EXPECT_FALSE(map.getTransitionOptions().duration);
}

TEST(Map, AddImage) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    auto decoded1 = decodeImage(util::read_file("test/fixtures/sprites/default_marker.png"));
    auto decoded2 = decodeImage(util::read_file("test/fixtures/sprites/default_marker.png"));
    auto image1 = std::make_unique<SpriteImage>(std::move(decoded1), 1.0);
    auto image2 = std::make_unique<SpriteImage>(std::move(decoded2), 1.0);

    // No-op.
    map.addImage("test-icon", std::move(image1));

    map.setStyleJSON(util::read_file("test/fixtures/api/icon_style.json"));
    map.addImage("test-icon", std::move(image2));
    test::checkImage("test/fixtures/map/add_icon", test::render(map, test.view));
}

TEST(Map, RemoveImage) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    auto decoded = decodeImage(util::read_file("test/fixtures/sprites/default_marker.png"));
    auto image = std::make_unique<SpriteImage>(std::move(decoded), 1.0);

    map.setStyleJSON(util::read_file("test/fixtures/api/icon_style.json"));
    map.addImage("test-icon", std::move(image));
    map.removeImage("test-icon");
    test::checkImage("test/fixtures/map/remove_icon", test::render(map, test.view));
}

TEST(Map, GetImage) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    auto decoded = decodeImage(util::read_file("test/fixtures/sprites/default_marker.png"));
    auto image = std::make_unique<SpriteImage>(std::move(decoded), 1.0);

    map.setStyleJSON(util::read_file("test/fixtures/api/icon_style.json"));
    map.addImage("test-icon", std::move(image));
    test::checkImage("test/fixtures/map/get_icon", map.getImage("test-icon")->image);
}

TEST(Map, DontLoadUnneededTiles) {
    MapTest test;

    Map map(test.backend, test.view.getSize(), 1, test.fileSource, test.threadPool, MapMode::Still);
    map.setStyleJSON(R"STYLE({
  "sources": {
    "a": { "type": "vector", "tiles": [ "a/{z}/{x}/{y}" ] }
  },
  "layers": [{
    "id": "a",
    "type": "fill",
    "source": "a",
    "source-layer": "a",
    "minzoom": 0.3,
    "maxzoom": 1.6
  }]
})STYLE");

    using Tiles = std::unordered_set<std::string>;
    Tiles tiles;

    test.fileSource.tileResponse = [&](const Resource& rsc) {
        tiles.emplace(rsc.url);
        Response res;
        res.noContent = true;
        return res;
    };

    std::unordered_map<double, Tiles> referenceTiles = {
        // Since the layer's minzoom is 0.3, we shouldn't load tiles before z0.3
        { 0.3, { "a/0/0/0" } },
        { 1.0, { "a/1/1/0", "a/1/0/1", "a/1/0/0", "a/1/1/1" } },
        // Since the layer's maxzoom is 1.6, we should never load z2 or z3 tiles.
    };

    // Loop through zoom levels from 0 to 3 and check that the correct tiles are loaded at every
    // step. The source is marked with maxzoom 1.0, which means that it won't be visible anymore
    // after z1.0, so we should under no circumstances attempt to load z2 tiles.
    for (unsigned zoom = 0; zoom <= 30; zoom++) { // times 10
        // Note: using z += 0.1 in the loop doesn't produce accurate floating point numbers.
        const double z = double(zoom) / 10;
        tiles.clear();
        map.setZoom(z);
        test::render(map, test.view);
        EXPECT_EQ(referenceTiles[z], tiles) << "zoom level " << z;
    }
}


class MockBackend : public HeadlessBackend {
public:
    MockBackend(std::shared_ptr<HeadlessDisplay> display_)
            : HeadlessBackend(display_) {
    }

    std::function<void()> callback;
    void invalidate() override {
        if (callback) {
            callback();
        }
    }
};

TEST(Map, TEST_DISABLED_ON_CI(ContinuousRendering)) {
    util::RunLoop runLoop;
    MockBackend backend { test::sharedDisplay() };
    BackendScope scope { backend };
    OffscreenView view { backend.getContext() };
    ThreadPool threadPool { 4 };

#ifdef MBGL_ASSET_ZIP
    // Regenerate with `cd test/fixtures/api/ && zip -r assets.zip assets/`
    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets.zip");
#else
    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets");
#endif

    Map map(backend, view.getSize(), 1, fileSource, threadPool, MapMode::Continuous);

    using namespace std::chrono_literals;

    util::Timer emergencyShutoff;
    emergencyShutoff.start(10s, 0s, [&] {
        util::RunLoop::Get()->stop();
        FAIL() << "Did not stop rendering";
    });

    util::Timer timer;
    util::AsyncTask render{[&] {
        if (map.isFullyLoaded()) {
            // Abort the test after 1 second after the map loading fully. Note that a "fully loaded
            // map" doesn't mean that we won't render anymore: we could still render fade in/fade
            // out or other animations.
            // If we are continuing to render indefinitely, the emergency shutoff above will trigger
            // and the test will fail since the regular time will be constantly reset.
            timer.start(1s, 0s, [&] {
                util::RunLoop::Get()->stop();
            });
        }

        BackendScope scope2(backend);
        map.render(view);
    }};

    backend.callback = [&] {
        render.send();
    };

    map.setStyleJSON(util::read_file("test/fixtures/api/water.json"));
    util::RunLoop::Get()->run();
}