Rebase the resource loading tests

Update the ResourceLoader tests to reflect the changes
after we merged ResourceLoader with Style.

4 files changed, 327 insertions, 0 deletions

diff --git a/test/style/mock_file_source.cpp b/test/style/mock_file_source.cpp
new file mode 100644
index 0000000000..42067a2a73
--- /dev/null
+++ b/test/style/mock_file_source.cpp
@@ -0,0 +1,82 @@
+#include "../fixtures/util.hpp"
+#include "mock_file_source.hpp"
+
+#include <mbgl/storage/request.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/thread.hpp>
+
+namespace mbgl {
+
+class MockFileSource::Impl {
+public:
+    Impl(uv_loop_t*, Type type, const std::string& match) : type_(type), match_(match) {}
+
+    void handleRequest(Request* req) const;
+
+private:
+    void replyWithFailure(Response* res) const;
+    void replyWithCorruptedData(Response* res, const std::string& url) const;
+    void replyWithSuccess(Response* res, const std::string& url) const;
+
+    Type type_;
+    std::string match_;
+};
+
+void MockFileSource::Impl::replyWithFailure(Response* res) const {
+    res->status = Response::Status::Error;
+    res->message = "Failed by the test case";
+}
+
+void MockFileSource::Impl::replyWithCorruptedData(Response* res, const std::string& url) const {
+    res->status = Response::Status::Successful;
+    res->data = util::read_file(url);
+    res->data.insert(0, "CORRUPTED");
+}
+
+void MockFileSource::Impl::replyWithSuccess(Response* res, const std::string& url) const {
+    res->status = Response::Status::Successful;
+    res->data = util::read_file(url);
+}
+
+void MockFileSource::Impl::handleRequest(Request* req) const {
+    const std::string& url = req->resource.url;
+    std::shared_ptr<Response> response = std::make_shared<Response>();
+
+    if (url.find(match_) == std::string::npos) {
+        replyWithSuccess(response.get(), url);
+        req->notify(response);
+        return;
+    }
+
+    switch (type_) {
+    case Type::Success:
+        replyWithSuccess(response.get(), url);
+        break;
+    case Type::RequestFail:
+        replyWithFailure(response.get());
+        break;
+    case Type::RequestWithCorruptedData:
+        replyWithCorruptedData(response.get(), url);
+        break;
+    default:
+        EXPECT_TRUE(false) << "Should never be reached.";
+    }
+
+    req->notify(response);
+}
+
+MockFileSource::MockFileSource(Type type, const std::string& match)
+    : thread_(std::make_unique<util::Thread<Impl>>("FileSource", util::ThreadPriority::Low, type, match)) {
+}
+
+Request* MockFileSource::request(const Resource& resource, uv_loop_t* loop, Callback callback) {
+    Request* req = new Request(resource, loop, std::move(callback));
+    thread_->invoke(&Impl::handleRequest, req);
+
+    return req;
+}
+
+void MockFileSource::cancel(Request*) {
+}
+
+}
diff --git a/test/style/mock_file_source.hpp b/test/style/mock_file_source.hpp
new file mode 100644
index 0000000000..bb9fb55a30
--- /dev/null
+++ b/test/style/mock_file_source.hpp
@@ -0,0 +1,40 @@
+#ifndef TEST_RESOURCES_MOCK_FILE_SOURCE
+#define TEST_RESOURCES_MOCK_FILE_SOURCE
+
+#include <mbgl/storage/file_source.hpp>
+
+#include <string>
+#include <memory>
+
+namespace mbgl {
+
+namespace util {
+template <typename T> class Thread;
+}
+
+// This mock FileSource will read data from the disk and will fail
+// the request if the URL matches a string.
+class MockFileSource : public FileSource {
+public:
+    enum Type {
+        Success,
+        RequestFail,
+        RequestWithCorruptedData
+    };
+
+    class Impl;
+
+    MockFileSource(Type type, const std::string& match);
+    ~MockFileSource() override = default;
+
+    // FileSource implementation.
+    Request* request(const Resource&, uv_loop_t*, Callback) override;
+    void cancel(Request*) override;
+
+private:
+    const std::unique_ptr<util::Thread<Impl>> thread_;
+};
+
+}
+
+#endif
diff --git a/test/style/mock_view.hpp b/test/style/mock_view.hpp
new file mode 100644
index 0000000000..865cd2da55
--- /dev/null
+++ b/test/style/mock_view.hpp
@@ -0,0 +1,21 @@
+#ifndef TEST_RESOURCES_MOCK_VIEW
+#define TEST_RESOURCES_MOCK_VIEW
+
+#include <mbgl/map/view.hpp>
+
+namespace mbgl {
+
+class MockView : public View {
+public:
+    MockView() = default;
+
+    // View implementation.
+    void activate() override {};
+    void deactivate() override {};
+    void notify() override {};
+    void invalidate(std::function<void()>) override {};
+};
+
+}
+
+#endif
diff --git a/test/style/resource_loading.cpp b/test/style/resource_loading.cpp
new file mode 100644
index 0000000000..5f7195d9b6
--- /dev/null
+++ b/test/style/resource_loading.cpp
@@ -0,0 +1,184 @@
+#include "../fixtures/fixture_log_observer.hpp"
+#include "../fixtures/util.hpp"
+#include "mock_file_source.hpp"
+#include "mock_view.hpp"
+
+#include <mbgl/map/environment.hpp>
+#include <mbgl/map/map_data.hpp>
+#include <mbgl/map/transform_state.hpp>
+#include <mbgl/style/style.hpp>
+#include <mbgl/util/exception.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/run_loop.hpp>
+#include <mbgl/util/texture_pool.hpp>
+#include <mbgl/util/thread.hpp>
+
+using namespace mbgl;
+
+namespace {
+
+class MockMapContext : public Style::Observer {
+public:
+    MockMapContext(uv_loop_t* loop,
+                   View& view,
+                   FileSource& fileSource,
+                   const std::function<void(std::exception_ptr error)>& callback)
+        : env_(fileSource),
+          envScope_(env_, ThreadType::Map, "Map"),
+          data_(view, MapMode::Still),
+          asyncUpdate(std::make_unique<uv::async>(loop, [this] { update(); })),
+          callback_(callback) {
+        asyncUpdate->unref();
+
+        data_.transform.resize(1000, 1000, 1.0, 1000, 1000);
+        data_.transform.setLatLngZoom({0, 0}, 16);
+
+        const std::string style = util::read_file("test/fixtures/resources/style.json");
+        style_ = std::make_unique<Style>(style, "", loop, env_),
+        style_->setObserver(this);
+    }
+
+    ~MockMapContext() {
+        style_.reset();
+        env_.performCleanup();
+    }
+
+    void update() {
+        const auto now = Clock::now();
+
+        data_.setAnimationTime(now);
+        data_.transform.updateTransitions(now);
+
+        transformState_ = data_.transform.currentState();
+        style_->update(data_, transformState_, texturePool_);
+    }
+
+    // Style::Observer implementation.
+    void onTileDataChanged() override {
+        if (style_->isLoaded()) {
+            callback_(nullptr);
+        }
+
+        asyncUpdate->send();
+    };
+
+    void onResourceLoadingFailed(std::exception_ptr error) override {
+        callback_(error);
+    }
+
+private:
+    Environment env_;
+    EnvironmentScope envScope_;
+
+    MapData data_;
+    TransformState transformState_;
+    TexturePool texturePool_;
+
+    std::unique_ptr<Style> style_;
+
+    std::unique_ptr<uv::async> asyncUpdate;
+
+    std::function<void(std::exception_ptr error)> callback_;
+};
+
+void runTestCase(MockFileSource::Type type,
+                 const std::string& param,
+                 const std::string& message) {
+    util::RunLoop loop(uv_default_loop());
+
+    MockView view;
+    MockFileSource fileSource(type, param);
+
+    FixtureLogObserver* log = new FixtureLogObserver();
+    Log::setObserver(std::unique_ptr<Log::Observer>(log));
+
+    auto callback = [type, &loop, &param](std::exception_ptr error) {
+        if (type == MockFileSource::Success) {
+            EXPECT_TRUE(error == nullptr);
+        } else {
+            EXPECT_TRUE(error != nullptr);
+        }
+
+        try {
+            if (error) {
+                std::rethrow_exception(error);
+            }
+        } catch (const util::GlyphRangeLoadingException&) {
+            EXPECT_EQ(param, "glyphs.pbf");
+        } catch (const util::SourceLoadingException&) {
+            EXPECT_EQ(param, "source.json");
+        } catch (const util::SpriteLoadingException&) {
+            EXPECT_TRUE(param == "sprite.png" || param == "sprite.json");
+        } catch (const util::TileLoadingException&) {
+            EXPECT_EQ(param, "vector.pbf");
+        } catch (const std::exception&) {
+            EXPECT_TRUE(false) << "Unhandled exception.";
+        }
+
+        loop.stop();
+    };
+
+    std::unique_ptr<util::Thread<MockMapContext>> context(
+        std::make_unique<util::Thread<MockMapContext>>(
+            "Map", util::ThreadPriority::Regular, view, fileSource, callback));
+
+    uv_run(loop.get(), UV_RUN_DEFAULT);
+
+    // Needed because it will make the Map thread
+    // join and cease logging after this point.
+    context.reset();
+
+    const FixtureLogObserver::LogMessage logMessage {
+        EventSeverity::Error,
+        Event::Style,
+        int64_t(-1),
+        message,
+    };
+
+    if (type == MockFileSource::Success) {
+        EXPECT_EQ(log->count(logMessage), 0u);
+    } else {
+        EXPECT_GT(log->count(logMessage), 0u);
+    }
+
+    // Clear the remaining error messages
+    log->unchecked().size();
+}
+
+}
+
+class ResourceLoading : public ::testing::TestWithParam<std::string> {
+};
+
+TEST_P(ResourceLoading, Success) {
+    runTestCase(MockFileSource::Success, GetParam(), std::string());
+}
+
+TEST_P(ResourceLoading, RequestFail) {
+    std::stringstream message;
+    message << "Failed to load [test/fixtures/resources/" << GetParam() << "]: Failed by the test case";
+
+    runTestCase(MockFileSource::RequestFail, GetParam(), message.str());
+}
+
+TEST_P(ResourceLoading, RequestWithCorruptedData) {
+    const std::string param(GetParam());
+
+    std::stringstream message;
+    message << "Failed to parse ";
+
+    if (param == "vector.pbf") {
+        message << "[15/16384/16384]: pbf unknown field type exception";
+    } else {
+        message << "[test/fixtures/resources/" << param << "]";
+    }
+
+    if (param.find("json") != std::string::npos) {
+        message << ": 0 - Expect either an object or array at root";
+    }
+
+    runTestCase(MockFileSource::RequestWithCorruptedData, GetParam(), message.str());
+}
+
+INSTANTIATE_TEST_CASE_P(Style, ResourceLoading,
+    ::testing::Values("source.json", "sprite.json", "sprite.png", "vector.pbf", "glyphs.pbf"));