Add tests for CompactStorage

They're too trivial for their own QTestLib-based approach, but we
don't want them in the header, either, reducing the compile times for
all users, so put them into an otherwise empty .cpp file.

Change-Id: Iae7fc4d4a29a0648b91752040854288e02da7045
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/corelib/tools/qfunctionaltools_impl.cpp b/src/corelib/tools/qfunctionaltools_impl.cpp
new file mode 100644
index 0000000000..28148c39a2
--- /dev/null
+++ b/src/corelib/tools/qfunctionaltools_impl.cpp
@@ -0,0 +1,47 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include <QtCore/qfunctionaltools_impl.h>
+
+// Remove this file once we have tests that implicitly test all aspects of
+// CompactStorage
+
+QT_BEGIN_NAMESPACE
+
+namespace QtPrivate {
+
+#define FOR_EACH_CVREF(op) \
+    op(&) \
+    op(const &) \
+    op(&&) \
+    op(const &&) \
+    /* end */
+
+namespace _testing {
+    struct empty {};
+    struct final final {};
+    static_assert(std::is_same_v<CompactStorage<empty>,
+                                 detail::StorageEmptyBaseClassOptimization<empty>>);
+    static_assert(std::is_same_v<CompactStorage<final>,
+                                 detail::StorageByValue<final>>);
+    static_assert(std::is_same_v<CompactStorage<int>,
+                                 detail::StorageByValue<int>>);
+#define CHECK1(Obj, cvref) \
+    static_assert(std::is_same_v<decltype(std::declval<CompactStorage< Obj > cvref>().object()), \
+                                 Obj cvref>);
+#define CHECK(cvref) \
+    CHECK1(empty, cvref) \
+    CHECK1(final, cvref) \
+    CHECK1(int, cvref) \
+    /* end */
+
+    FOR_EACH_CVREF(CHECK)
+#undef CHECK
+#undef CHECK1
+} // namespace _testing
+
+} // namespace QtPrivate
+
+#undef FOR_EACH_CVREF
+
+QT_END_NAMESPACE