QmlDesigner: Extract default property in qml document parser

Change-Id: I2b3576312cc2bec0c2e103fd3f342a5fe059b10c
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Qt CI Patch Build Bot <ci_patchbuild_bot@qt.io>

src/plugins/qmldesigner/designercore/projectstorage/qmldocumentparser.cpp

@@ -353,7 +353,7 @@ Storage::Synchronization::Type QmlDocumentParser::parse(const QString &sourceCon
                                                          m_storage);
 
     type.prototype = createImportedTypeName(qmlObject.name(), qualifiedImports);
-
+    type.defaultPropertyName = qmlObject.localDefaultPropertyName();
     addImports(imports, qmlFile->imports(), sourceId, directoryPath, m_storage);
 
     addPropertyDeclarations(type, qmlObject, qualifiedImports, file);

tests/unit/tests/unittests/projectstorage/qmldocumentparser-test.cpp

@@ -516,4 +516,16 @@ TEST_F(QmlDocumentParser, qualified_list_property)
                     Storage::PropertyDeclarationTraits::IsList)));
 }
 
+TEST_F(QmlDocumentParser, default_property)
+{
+    auto type = parser.parse(R"(import Example 2.1 as Example
+                                Item{
+                                    default property list<Example.Foo> foos
+                                })",
+                             imports,
+                             qmlFileSourceId,
+                             directoryPath);
+
+    ASSERT_THAT(type.defaultPropertyName, Eq("foos"));
+}
 } // namespace