Don't truncate QDateTime milliseconds when storing QSettings on Apple platforms

The fix is trivial, but the patch adds a new QSettings tests that iterates most
of the QMetaTypes and verifies that storing and retrieving them again gives the
same value. This is a more complete test than the testVariantTypes tests, which
is limited to a subset of the QVariant types. The new tests borrows logic from
the QMetaType test machinery.

QSettings has been Q_ENUM'ified in the process, for improved debug output.

Note that on backends such as the INI backend, the metatype of the QVariant read
from the settings will be a string, so it won't match the input QVariant type,
but the result of converting that to the original value type should still work.

Task-number: QTBUG-56124
Change-Id: Ib03a26abf77c9fb449b94160d28bc4baeb095f25
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/corelib/io/qsettings.h b/src/corelib/io/qsettings.h
index 21fb9519de..edd59026ed 100644
--- a/src/corelib/io/qsettings.h
+++ b/src/corelib/io/qsettings.h
@@ -80,6 +80,9 @@ public:
         AccessError,
         FormatError
     };
+#ifndef QT_NO_QOBJECT
+    Q_ENUM(Status)
+#endif
 
     enum Format {
         NativeFormat,
@@ -108,11 +111,17 @@ public:
         CustomFormat15,
         CustomFormat16
     };
+#ifndef QT_NO_QOBJECT
+    Q_ENUM(Format)
+#endif
 
     enum Scope {
         UserScope,
         SystemScope
     };
+#ifndef QT_NO_QOBJECT
+    Q_ENUM(Scope)
+#endif
 
 #ifndef QT_NO_QOBJECT
     explicit QSettings(const QString &organization,