Add focused cache and prepared media rendering checks to desktop tests

tools/chatgui/CMakeLists.txt

@@ -145,6 +145,11 @@ target_include_directories(chatgui_preview_cache PRIVATE ${FFMPEG_INCLUDE_DIRS})
 if(FFMPEG_FOUND)
     target_compile_definitions(chatgui_preview_cache PRIVATE HAVE_FFMPEG)
 endif()
+add_executable(test_media_preview_cache tests/test_media_preview_cache.cpp)
+target_link_libraries(test_media_preview_cache PRIVATE chatgui_preview_cache ${QT_TEST_LIB})
+target_compile_definitions(test_media_preview_cache PRIVATE TEST_PREVIEW_FFMPEG=$<BOOL:${FFMPEG_FOUND}>)
+add_test(NAME test_media_preview_cache COMMAND test_media_preview_cache)
+set_tests_properties(test_media_preview_cache PROPERTIES TIMEOUT 30)
 
 add_library(chatgui_live_video STATIC src/live_video_encoder.cpp src/call_video_encoder.cpp src/call_video_decoder.cpp)
 target_link_libraries(chatgui_live_video PUBLIC ${QT_LIBS} utun PRIVATE ${FFMPEG_TARGET} ${FFMPEG_LIBRARIES})

tools/chatgui/tests/test_invite_links.cpp

@@ -11,6 +11,7 @@
 #include <QPainter>
 #include <QDir>
 #include <QScopedValueRollback>
+#include <QTemporaryDir>
 extern "C" {
 #include "chat/invite_link.h"
 #include "chat/chat_member.h"
@@ -19,6 +20,25 @@ extern "C" {
 class InviteLinksTest : public QObject {
     Q_OBJECT
 private slots:
+    void preparedMediaPaint_data() {
+        QTest::addColumn<QString>("type"); QTest::newRow("image") << QString("image/png"); QTest::newRow("video") << QString("video/mp4");
+    }
+    void preparedMediaPaint() {
+        QFETCH(QString, type); QTemporaryDir temporary; QVERIFY(temporary.isValid());
+        QStandardItemModel model; auto* item = new QStandardItem;
+        item->setData(type, MsgContentTypeRole); item->setData("Alice", MsgAuthorRole); item->setData("12:34", MsgTimeRole);
+        item->setData(temporary.filePath("removed-original"), MsgVoiceFileRole); item->setData(2, MsgFileDownloadStateRole);
+        item->setData(1234, MsgFileSizeRole); item->setData(120, MsgImageWidthRole); item->setData(80, MsgImageHeightRole);
+        const QColor green(35, 170, 95); QImage preview(120, 80, QImage::Format_RGB32); preview.fill(green);
+        item->setData(preview, MsgImagePreviewRole); model.appendRow(item);
+        MessageDelegate delegate; QStyleOptionViewItem option; option.font = QApplication::font(); option.rect = QRect(0, 0, 600, 400);
+        QImage output(option.rect.size(), QImage::Format_ARGB32); output.fill(Qt::white);
+        QPainter painter(&output); delegate.paint(&painter, option, model.index(0, 0)); painter.end();
+        int preparedPixels = 0;
+        for (int y = 0; y < output.height(); ++y) for (int x = 0; x < output.width(); ++x)
+            if (output.pixelColor(x, y) == green) ++preparedPixels;
+        QVERIFY(preparedPixels > 100); // Готовые пиксели рисуются даже без оригинала и соседнего .jpg.
+    }
     void replyClick_data() {
         QTest::addColumn<QString>("type"); QTest::addColumn<bool>("outgoing"); QTest::addColumn<int>("width");
         for (const auto* type : {"text/plain", "audio/opus", "image/png", "video/mp4", "application/octet-stream", "poll", "emoji"})