[core] Split style image collection from SpriteAtlas

test/sprite/sprite_loader.test.cpp

@@ -0,0 +1,164 @@
+#include <mbgl/test/util.hpp>
+#include <mbgl/test/fixture_log_observer.hpp>
+#include <mbgl/test/stub_file_source.hpp>
+#include <mbgl/test/stub_style_observer.hpp>
+
+#include <mbgl/sprite/sprite_loader.hpp>
+#include <mbgl/sprite/sprite_parser.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/image.hpp>
+#include <mbgl/util/run_loop.hpp>
+#include <mbgl/util/default_thread_pool.hpp>
+#include <mbgl/util/string.hpp>
+
+#include <utility>
+
+using namespace mbgl;
+
+class SpriteLoaderTest {
+public:
+    SpriteLoaderTest() = default;
+
+    util::RunLoop loop;
+    StubFileSource fileSource;
+    StubStyleObserver observer;
+    ThreadPool threadPool { 1 };
+    SpriteLoader spriteLoader{ 1 };
+
+    void run() {
+        // Squelch logging.
+        Log::setObserver(std::make_unique<Log::NullObserver>());
+
+        spriteLoader.setObserver(&observer);
+        spriteLoader.load("test/fixtures/resources/sprite", threadPool, fileSource);
+
+        loop.run();
+    }
+
+    void end() {
+        loop.stop();
+    }
+};
+
+Response successfulSpriteImageResponse(const Resource& resource) {
+    EXPECT_EQ("test/fixtures/resources/sprite.png", resource.url);
+    Response response;
+    response.data = std::make_unique<std::string>(util::read_file(resource.url));
+    return response;
+}
+
+Response successfulSpriteJSONResponse(const Resource& resource) {
+    EXPECT_EQ("test/fixtures/resources/sprite.json", resource.url);
+    Response response;
+    response.data = std::make_unique<std::string>(util::read_file(resource.url));
+    return response;
+}
+
+Response failedSpriteResponse(const Resource&) {
+    Response response;
+    response.error = std::make_unique<Response::Error>(
+        Response::Error::Reason::Other,
+        "Failed by the test case");
+    return response;
+}
+
+Response corruptSpriteResponse(const Resource&) {
+    Response response;
+    response.data = std::make_unique<std::string>("CORRUPT");
+    return response;
+}
+
+TEST(SpriteLoader, LoadingSuccess) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse = successfulSpriteImageResponse;
+    test.fileSource.spriteJSONResponse = successfulSpriteJSONResponse;
+
+    test.observer.spriteError = [&] (std::exception_ptr error) {
+        FAIL() << util::toString(error);
+        test.end();
+    };
+
+    test.observer.spriteLoaded = [&] (SpriteLoaderObserver::Images&& images) {
+        EXPECT_EQ(images.size(), Images::size_type(367));
+        test.end();
+    };
+
+    test.run();
+}
+
+TEST(SpriteLoader, JSONLoadingFail) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse = successfulSpriteImageResponse;
+    test.fileSource.spriteJSONResponse = failedSpriteResponse;
+
+    test.observer.spriteError = [&] (std::exception_ptr error) {
+        EXPECT_TRUE(error != nullptr);
+        EXPECT_EQ("Failed by the test case", util::toString(error));
+        test.end();
+    };
+
+    test.run();
+}
+
+TEST(SpriteLoader, ImageLoadingFail) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse = failedSpriteResponse;
+    test.fileSource.spriteJSONResponse = successfulSpriteJSONResponse;
+
+    test.observer.spriteError = [&] (std::exception_ptr error) {
+        EXPECT_TRUE(error != nullptr);
+        EXPECT_EQ("Failed by the test case", util::toString(error));
+        test.end();
+    };
+
+    test.run();
+}
+
+TEST(SpriteLoader, JSONLoadingCorrupted) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse = successfulSpriteImageResponse;
+    test.fileSource.spriteJSONResponse = corruptSpriteResponse;
+
+    test.observer.spriteError = [&] (std::exception_ptr error) {
+        EXPECT_TRUE(error != nullptr);
+        EXPECT_EQ("Failed to parse JSON: Invalid value. at offset 0", util::toString(error));
+        test.end();
+    };
+
+    test.run();
+}
+
+TEST(SpriteLoader, ImageLoadingCorrupted) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse = corruptSpriteResponse;
+    test.fileSource.spriteJSONResponse = successfulSpriteJSONResponse;
+
+    test.observer.spriteError = [&] (std::exception_ptr error) {
+        EXPECT_TRUE(error != nullptr);
+        // Not asserting on platform-specific error text.
+        test.end();
+    };
+
+    test.run();
+}
+
+TEST(SpriteLoader, LoadingCancel) {
+    SpriteLoaderTest test;
+
+    test.fileSource.spriteImageResponse =
+    test.fileSource.spriteJSONResponse = [&] (const Resource&) {
+        test.end();
+        return optional<Response>();
+    };
+
+    test.observer.spriteLoaded = [&] (const SpriteLoaderObserver::Images&) {
+        FAIL() << "Should never be called";
+    };
+
+    test.run();
+}