test(bluetooth): keep the installed network plugin and FishUI's icon provider out of the QML test

bluetooth/tests/CMakeLists.txt

@@ -30,8 +30,11 @@ if(TARGET cutefish-framework-bluetooth AND EXISTS "${settings_page}")
     find_package(Qt6 REQUIRED COMPONENTS Quick)
     add_executable(tst_bluetoothqml tst_bluetoothqml.cpp)
     target_link_libraries(tst_bluetoothqml PRIVATE cutefish-framework-bluetooth Qt6::Quick Qt6::Test)
+    # An unversioned import would load the installed network plugin over the stubs.
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/stubs/Cutefish/Network/qmldir" "module Cutefish.Network\n")
     target_compile_definitions(tst_bluetoothqml PRIVATE
         BLUETOOTH_IMPORT_PATH="${CMAKE_CURRENT_BINARY_DIR}/.."
+        STUB_IMPORT_PATH="${CMAKE_CURRENT_BINARY_DIR}/stubs"
         SETTINGS_BLUETOOTH_PAGE="${settings_page}"
     )
     add_test(NAME bluetooth-qml COMMAND ${DBUS_RUN_SESSION} -- $<TARGET_FILE:tst_bluetoothqml>)

bluetooth/tests/tst_bluetoothqml.cpp

@@ -105,6 +105,7 @@ private slots:
         QVERIFY(bus.registerVirtualObject(QStringLiteral("/"), &fake, QDBusConnection::SubPath));
         QQmlEngine engine;
         engine.addImportPath(QStringLiteral(BLUETOOTH_IMPORT_PATH));
+        engine.addImportPath(QStringLiteral(STUB_IMPORT_PATH));
         QQmlComponent host(&engine);
         host.setData(R"(
             import QtQuick
@@ -172,12 +173,13 @@ private slots:
         QVERIFY(bus.registerService(QStringLiteral("org.bluez")));
         QQmlEngine engine;
         engine.addImportPath(QStringLiteral(BLUETOOTH_IMPORT_PATH));
-        engine.addImageProvider(QStringLiteral("icontheme"), new TestIconProvider);
+        engine.addImportPath(QStringLiteral(STUB_IMPORT_PATH));
         QSignalSpy warnings(&engine, &QQmlEngine::warnings);
         QQmlComponent host(&engine);
         host.setData(R"(
             import QtQuick
             import QtQuick.Controls
+            import FishUI
             ApplicationWindow {
                 width: 900
                 height: 650
@@ -190,6 +192,8 @@ private slots:
                      QUrl());
         std::unique_ptr<QObject> window(host.create());
         QVERIFY2(window, qPrintable(host.errorString()));
+        // After FishUI's import, which installs the real provider in its place.
+        engine.addImageProvider(QStringLiteral("icontheme"), new TestIconProvider);
         engine.rootContext()->setContextProperty(QStringLiteral("rootWindow"), window.get());
         QQmlComponent component(&engine,
                                 QUrl::fromLocalFile(QStringLiteral(SETTINGS_BLUETOOTH_PAGE)));