Android: activate tst_QPlugin

- Use QT_ANDROID_EXTRA_LIBS to correctly deploy libraries on Android.
- Update the test code to use the application libraries directory
  instead of resources on Android.

This allows to enable the test for Android in CMakeLists.txt

Task-number: QTBUG-87438
Pick-to: 6.3 6.2
Change-Id: I2f6d2d4f3ab3872cf7d7fad1668b5c2c3eef3aad
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

tests/auto/corelib/plugin/CMakeLists.txt

@@ -10,7 +10,6 @@ if(QT_FEATURE_library AND NOT ANDROID)
     add_subdirectory(qpluginloader)
     add_subdirectory(qlibrary)
 endif()
-# QTBUG-87438 # special case
-if(QT_BUILD_SHARED_LIBS AND QT_FEATURE_library AND NOT ANDROID)
+if(QT_BUILD_SHARED_LIBS AND QT_FEATURE_library)
     add_subdirectory(qplugin)
 endif()

tests/auto/corelib/plugin/qplugin/CMakeLists.txt

@@ -1,27 +1,41 @@
 # Generated from qplugin.pro.
 
 add_subdirectory(invalidplugin)
-
-# special case begin
 add_subdirectory(debugplugin)
 add_subdirectory(releaseplugin)
 
-# The contents below are generated from ./tst_qplugin.pro
-# Collect test data
-file(GLOB_RECURSE test_data_glob
-    RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
-    plugins/*)
-list(APPEND test_data ${test_data_glob})
-
 qt_internal_add_test(tst_qplugin
     SOURCES
         tst_qplugin.cpp
     LIBRARIES
         Qt::CorePrivate
-    TESTDATA ${test_data}
 )
 
+if(NOT ANDROID)
+    # Collect test data
+    file(GLOB_RECURSE test_data_glob
+        RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
+        plugins/*)
+    list(APPEND test_data ${test_data_glob})
+    set_target_properties(tst_qplugin PROPERTIES TESTDATA "${test_data}")
+else()
+    # On Android the plugins must be located in the libs subdir of the APK.
+    # Use QT_ANDROID_EXTRA_LIBS to achieve that.
+    set(plugins
+        invalidplugin
+        debugplugin
+        releaseplugin
+    )
+    set(extra_libs)
+    foreach(plugin IN LISTS plugins)
+        list(APPEND extra_libs
+            "${CMAKE_CURRENT_BINARY_DIR}/plugins/lib${plugin}_${CMAKE_ANDROID_ARCH_ABI}.so")
+    endforeach()
+    set_target_properties(tst_qplugin PROPERTIES
+        QT_ANDROID_EXTRA_LIBS "${extra_libs}"
+    )
+endif()
+
 target_compile_definitions(tst_qplugin PRIVATE CMAKE_BUILD=1)
 
 add_dependencies(tst_qplugin invalidplugin debugplugin releaseplugin)
-# special case end

tests/auto/corelib/plugin/qplugin/tst_qplugin.cpp

@@ -54,8 +54,15 @@ private slots:
 };
 
 tst_QPlugin::tst_QPlugin()
-    : dir(QFINDTESTDATA("plugins"))
 {
+    // On Android the plugins must be located in the APK's libs subdir
+#ifndef Q_OS_ANDROID
+    dir = QFINDTESTDATA("plugins");
+#else
+    const QStringList paths = QCoreApplication::libraryPaths();
+    if (!paths.isEmpty())
+        dir = paths.first();
+#endif
 }
 
 void tst_QPlugin::initTestCase()