Merge bitcoin-core/gui#593: Getting ready to Qt 6 (8/n). Use `QRegularExpression` in `AddressBookSortFilterProxyModel` class

e280087946184b37c8a1eb345fae30ebb07f3384 qt: Use `QRegularExpression` in `AddressBookSortFilterProxyModel` class (Hennadii Stepanov)
5c5d8f2465be70cbc256ec59913ac0a3c7c958be qt, test: Add tests for searching in `AddressBookPage` dialog (Hennadii Stepanov)

Pull request description:

  This is a step in [migration](https://github.com/bitcoin/bitcoin/pull/24798) to Qt 6.

  Related:
  - bitcoin-core/gui#578
  - bitcoin-core/gui#585

  No behavior change. To ensure this, tests have been added.

ACKs for top commit:
  hebasto:
    > tACK [e280087](https://github.com/bitcoin-core/gui/commit/e280087946184b37c8a1eb345fae30ebb07f3384) on Ubuntu 21.10 Qt 5.15.2
  promag:
    Tested ACK e280087946184b37c8a1eb345fae30ebb07f3384 with Qt6 on macOS 12 M1.
  w0xlt:
    tACK https://github.com/bitcoin-core/gui/pull/593/commits/e280087946184b37c8a1eb345fae30ebb07f3384 on Ubuntu 21.10 Qt 5.15.2
  jarolrod:
    Tested ACK https://github.com/bitcoin-core/gui/commit/e280087946184b37c8a1eb345fae30ebb07f3384 on M1 mac, x86 mac, x86 Linux with Qt5 and separately with Qt6

Tree-SHA512: 664baacc1504deb2f7fa651ea4a44f3942f5c9058befe4d2ce292beed032d4b1697710cfd10c0909602d8a4a6eeb680414e4a1f56d2038478c1ae2f34965d74f

2 files changed, 61 insertions, 9 deletions

diff --git a/src/qt/addressbookpage.cpp b/src/qt/addressbookpage.cpp
index d59a4345f3..a82bd5f73e 100644
--- a/src/qt/addressbookpage.cpp
+++ b/src/qt/addressbookpage.cpp
@@ -19,6 +19,11 @@
 #include <QMenu>
 #include <QMessageBox>
 #include <QSortFilterProxyModel>
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+#include <QRegularExpression>
+#else
+#include <QRegExp>
+#endif
 
 class AddressBookSortFilterProxyModel final : public QSortFilterProxyModel
 {
@@ -46,12 +51,13 @@ protected:
 
         auto address = model->index(row, AddressTableModel::Address, parent);
 
-        if (filterRegExp().indexIn(model->data(address).toString()) < 0 &&
-            filterRegExp().indexIn(model->data(label).toString()) < 0) {
-            return false;
-        }
-
-        return true;
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+        const auto pattern = filterRegularExpression();
+#else
+        const auto pattern = filterRegExp();
+#endif
+        return (model->data(address).toString().contains(pattern) ||
+                model->data(label).toString().contains(pattern));
     }
 };
 
diff --git a/src/qt/test/addressbooktests.cpp b/src/qt/test/addressbooktests.cpp
index 45dcc5a2fc..ededde4da9 100644
--- a/src/qt/test/addressbooktests.cpp
+++ b/src/qt/test/addressbooktests.cpp
@@ -24,6 +24,7 @@
 #include <chrono>
 
 #include <QApplication>
+#include <QLineEdit>
 #include <QMessageBox>
 #include <QTableView>
 #include <QTimer>
@@ -102,11 +103,13 @@ void TestAddAddressesToSendBook(interfaces::Node& node)
     QString s_label("already here (s)");
 
     // Define a new address (which should add to the address book successfully).
-    QString new_address;
+    QString new_address_a;
+    QString new_address_b;
 
     std::tie(r_key_dest, preexisting_r_address) = build_address();
     std::tie(s_key_dest, preexisting_s_address) = build_address();
-    std::tie(std::ignore, new_address) = build_address();
+    std::tie(std::ignore, new_address_a) = build_address();
+    std::tie(std::ignore, new_address_b) = build_address();
 
     {
         LOCK(wallet->cs_wallet);
@@ -159,9 +162,52 @@ void TestAddAddressesToSendBook(interfaces::Node& node)
     // Submit a new address which should add successfully - we expect the
     // warning message to be blank.
     EditAddressAndSubmit(
-        &editAddressDialog, QString("new"), new_address, QString(""));
+        &editAddressDialog, QString("io - new A"), new_address_a, QString(""));
     check_addbook_size(3);
     QCOMPARE(table_view->model()->rowCount(), 2);
+
+    EditAddressAndSubmit(
+        &editAddressDialog, QString("io - new B"), new_address_b, QString(""));
+    check_addbook_size(4);
+    QCOMPARE(table_view->model()->rowCount(), 3);
+
+    auto search_line = address_book.findChild<QLineEdit*>("searchLineEdit");
+
+    search_line->setText(r_label);
+    QCOMPARE(table_view->model()->rowCount(), 0);
+
+    search_line->setText(s_label);
+    QCOMPARE(table_view->model()->rowCount(), 1);
+
+    search_line->setText("io");
+    QCOMPARE(table_view->model()->rowCount(), 2);
+
+    // Check wilcard "?".
+    search_line->setText("io?new");
+    QCOMPARE(table_view->model()->rowCount(), 0);
+    search_line->setText("io???new");
+    QCOMPARE(table_view->model()->rowCount(), 2);
+
+    // Check wilcard "*".
+    search_line->setText("io*new");
+    QCOMPARE(table_view->model()->rowCount(), 2);
+    search_line->setText("*");
+    QCOMPARE(table_view->model()->rowCount(), 3);
+
+    search_line->setText(preexisting_r_address);
+    QCOMPARE(table_view->model()->rowCount(), 0);
+
+    search_line->setText(preexisting_s_address);
+    QCOMPARE(table_view->model()->rowCount(), 1);
+
+    search_line->setText(new_address_a);
+    QCOMPARE(table_view->model()->rowCount(), 1);
+
+    search_line->setText(new_address_b);
+    QCOMPARE(table_view->model()->rowCount(), 1);
+
+    search_line->setText("");
+    QCOMPARE(table_view->model()->rowCount(), 3);
 }
 
 } // namespace