QMimeDatabase: collect glob patterns from all locations

A QMimeTypePrivate used to belong to a single provider, which would
provide the complete data for it.
But since the redesign in commit 7a5644d6481a3c1a741677, each provider
represents is a single mime directory, and the merging happens at the
QMimeDatabase level. So we need a QMimeType[Private] to be just a name
(a "request" for information about this mimetype) and the information
for that mimetype is retrieved on demand by querying the providers
and either stopping at the first one (e.g. for icons) or merging
the data from all of them (e.g. for glob patterns).

The XML provider was using QMimeTypePrivate as data storage,
give it its own struct QMimeTypeXMLData for that purpose instead.

Task-number: QTBUG-116905
Change-Id: Ia0e0d94aa899720dc0b908f40c25317473005af4
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

13 files changed, 258 insertions, 328 deletions

diff --git a/src/corelib/mimetypes/qmimedatabase.cpp b/src/corelib/mimetypes/qmimedatabase.cpp
index 63f398a921..84547ff32e 100644
--- a/src/corelib/mimetypes/qmimedatabase.cpp
+++ b/src/corelib/mimetypes/qmimedatabase.cpp
@@ -190,9 +190,8 @@ QMimeType QMimeDatabasePrivate::mimeTypeForName(const QString &nameOrAlias)
 {
     const QString mimeName = resolveAlias(nameOrAlias);
     for (const auto &provider : providers()) {
-        QMimeType mime = provider->mimeTypeForName(mimeName);
-        if (mime.isValid())
-            return mime;
+        if (provider->knowsMimeType(mimeName))
+            return QMimeType(QMimeTypePrivate(mimeName));
     }
     return {};
 }
@@ -217,54 +216,54 @@ QMimeGlobMatchResult QMimeDatabasePrivate::findByFileName(const QString &fileNam
     return result;
 }
 
-void QMimeDatabasePrivate::loadMimeTypePrivate(QMimeTypePrivate &mimePrivate)
+QMimeTypePrivate::LocaleHash QMimeDatabasePrivate::localeComments(const QString &name)
 {
     QMutexLocker locker(&mutex);
-    if (mimePrivate.name.isEmpty())
-        return; // invalid mimetype
-    if (!mimePrivate.loaded) { // XML provider sets loaded=true, binary provider does this on demand
-        Q_ASSERT(mimePrivate.fromCache);
-        bool found = false;
-        for (const auto &provider : providers()) {
-            if (provider->loadMimeTypePrivate(mimePrivate)) {
-                found = true;
-                break;
-            }
-        }
-        if (!found) {
-            const QString file = mimePrivate.name + ".xml"_L1;
-            qWarning() << "No file found for" << file << ", even though update-mime-info said it would exist.\n"
-                          "Either it was just removed, or the directory doesn't have executable permission..."
-                       << locateMimeDirectories();
-        }
-        mimePrivate.loaded = true;
+    for (const auto &provider : providers()) {
+        auto comments = provider->localeComments(name);
+        if (!comments.isEmpty())
+            return comments; // maybe we want to merge in comments from more global providers, in
+                             // case of more translations?
     }
+    return {};
 }
 
-void QMimeDatabasePrivate::loadGenericIcon(QMimeTypePrivate &mimePrivate)
+QStringList QMimeDatabasePrivate::globPatterns(const QString &name)
 {
     QMutexLocker locker(&mutex);
-    if (mimePrivate.fromCache) {
-        mimePrivate.genericIconName.clear();
-        for (const auto &provider : providers()) {
-            provider->loadGenericIcon(mimePrivate);
-            if (!mimePrivate.genericIconName.isEmpty())
-                break;
-        }
+    QStringList patterns;
+    const auto &providerList = providers();
+    // reverse iteration because we start from most global, add up, clear if delete-all, and add up
+    // again.
+    for (auto rit = providerList.rbegin(); rit != providerList.rend(); ++rit) {
+        auto *provider = rit->get();
+        if (provider->hasGlobDeleteAll(name))
+            patterns.clear();
+        patterns += provider->globPatterns(name);
     }
+    return patterns;
 }
 
-void QMimeDatabasePrivate::loadIcon(QMimeTypePrivate &mimePrivate)
+QString QMimeDatabasePrivate::genericIcon(const QString &name)
 {
     QMutexLocker locker(&mutex);
-    if (mimePrivate.fromCache) {
-        mimePrivate.iconName.clear();
-        for (const auto &provider : providers()) {
-            provider->loadIcon(mimePrivate);
-            if (!mimePrivate.iconName.isEmpty())
-                break;
-        }
+    for (const auto &provider : providers()) {
+        QString genericIconName = provider->genericIcon(name);
+        if (!genericIconName.isEmpty())
+            return genericIconName;
     }
+    return {};
+}
+
+QString QMimeDatabasePrivate::icon(const QString &name)
+{
+    QMutexLocker locker(&mutex);
+    for (const auto &provider : providers()) {
+        QString iconName = provider->icon(name);
+        if (!iconName.isEmpty())
+            return iconName;
+    }
+    return {};
 }
 
 QString QMimeDatabasePrivate::fallbackParent(const QString &mimeTypeName) const
@@ -345,12 +344,12 @@ QMimeType QMimeDatabasePrivate::findByData(const QByteArray &data, int *accuracy
     }
 
     *accuracyPtr = 0;
-    QMimeType candidate;
+    QString candidate;
     for (const auto &provider : providers())
-        provider->findByMagic(data, accuracyPtr, candidate);
+        provider->findByMagic(data, accuracyPtr, &candidate);
 
-    if (candidate.isValid())
-        return candidate;
+    if (!candidate.isEmpty())
+        return QMimeType(QMimeTypePrivate(candidate));
 
     if (isTextFile(data)) {
         *accuracyPtr = 5;
diff --git a/src/corelib/mimetypes/qmimedatabase_p.h b/src/corelib/mimetypes/qmimedatabase_p.h
index 96981ba3fe..cb28f0b791 100644
--- a/src/corelib/mimetypes/qmimedatabase_p.h
+++ b/src/corelib/mimetypes/qmimedatabase_p.h
@@ -66,9 +66,10 @@ public:
     QMimeGlobMatchResult findByFileName(const QString &fileName);
 
     // API for QMimeType. Takes care of locking the mutex.
-    void loadMimeTypePrivate(QMimeTypePrivate &mimePrivate);
-    void loadGenericIcon(QMimeTypePrivate &mimePrivate);
-    void loadIcon(QMimeTypePrivate &mimePrivate);
+    QMimeTypePrivate::LocaleHash localeComments(const QString &name);
+    QStringList globPatterns(const QString &name);
+    QString genericIcon(const QString &name);
+    QString icon(const QString &name);
     QStringList mimeParents(const QString &mimeName);
     QStringList listAliases(const QString &mimeName);
     bool mimeInherits(const QString &mime, const QString &parent);
@@ -81,7 +82,7 @@ private:
     QString fallbackParent(const QString &mimeTypeName) const;
 
     const QString m_defaultMimeType;
-    mutable Providers m_providers;
+    mutable Providers m_providers; // most local first, most global last
     QElapsedTimer m_lastCheck;
 
 public:
diff --git a/src/corelib/mimetypes/qmimeprovider.cpp b/src/corelib/mimetypes/qmimeprovider.cpp
index 9013cdf161..a55f8314df 100644
--- a/src/corelib/mimetypes/qmimeprovider.cpp
+++ b/src/corelib/mimetypes/qmimeprovider.cpp
@@ -186,25 +186,11 @@ void QMimeBinaryProvider::ensureLoaded()
         m_cacheFile.reset();
 }
 
-static QMimeType mimeTypeForNameUnchecked(const QString &name)
-{
-    QMimeTypePrivate data;
-    data.name = name;
-    data.fromCache = true;
-    // The rest is retrieved on demand.
-    // comment and globPatterns: in loadMimeTypePrivate
-    // iconName: in loadIcon
-    // genericIconName: in loadGenericIcon
-    return QMimeType(data);
-}
-
-QMimeType QMimeBinaryProvider::mimeTypeForName(const QString &name)
+bool QMimeBinaryProvider::knowsMimeType(const QString &name)
 {
     if (!m_mimetypeListLoaded)
         loadMimeTypeList();
-    if (!m_mimetypeNames.contains(name))
-        return QMimeType(); // unknown mimetype
-    return mimeTypeForNameUnchecked(name);
+    return m_mimetypeNames.contains(name);
 }
 
 void QMimeBinaryProvider::addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result)
@@ -354,7 +340,7 @@ bool QMimeBinaryProvider::matchMagicRule(QMimeBinaryProvider::CacheFile *cacheFi
     return false;
 }
 
-void QMimeBinaryProvider::findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate)
+void QMimeBinaryProvider::findByMagic(const QByteArray &data, int *accuracyPtr, QString *candidate)
 {
     const int magicListOffset = m_cacheFile->getUint32(PosMagicListOffset);
     const int numMatches = m_cacheFile->getUint32(magicListOffset);
@@ -371,7 +357,7 @@ void QMimeBinaryProvider::findByMagic(const QByteArray &data, int *accuracyPtr,
             *accuracyPtr = m_cacheFile->getUint32(off);
             // Return the first match. We have no rules for conflicting magic data...
             // (mime.cache itself is sorted, but what about local overrides with a lower prio?)
-            candidate = mimeTypeForNameUnchecked(QLatin1StringView(mimeType));
+            *candidate = QString::fromLatin1(mimeType);
             return;
         }
     }
@@ -480,35 +466,63 @@ void QMimeBinaryProvider::addAllMimeTypes(QList<QMimeType> &result)
     if (result.isEmpty()) {
         result.reserve(m_mimetypeNames.size());
         for (const QString &name : std::as_const(m_mimetypeNames))
-            result.append(mimeTypeForNameUnchecked(name));
+            result.append(QMimeType(QMimeTypePrivate(name)));
     } else {
         for (const QString &name : std::as_const(m_mimetypeNames))
             if (std::find_if(result.constBegin(), result.constEnd(), [name](const QMimeType &mime) -> bool { return mime.name() == name; })
                     == result.constEnd())
-                result.append(mimeTypeForNameUnchecked(name));
+                result.append(QMimeType(QMimeTypePrivate(name)));
     }
 }
 
-bool QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
+QMimeTypePrivate::LocaleHash QMimeBinaryProvider::localeComments(const QString &name)
 {
-#if QT_CONFIG(xmlstreamreader)
-    if (data.loaded)
-        return true;
+    MimeTypeExtraMap::const_iterator it = loadMimeTypeExtra(name);
+    if (it != m_mimetypeExtra.constEnd()) {
+        const MimeTypeExtra &e = it.value();
+        return e.localeComments;
+    }
+    return {};
+}
 
-    auto it = m_mimetypeExtra.constFind(data.name);
+bool QMimeBinaryProvider::hasGlobDeleteAll(const QString &name)
+{
+    MimeTypeExtraMap::const_iterator it = loadMimeTypeExtra(name);
+    if (it != m_mimetypeExtra.constEnd()) {
+        const MimeTypeExtra &e = it.value();
+        return e.hasGlobDeleteAll;
+    }
+    return {};
+}
+
+QStringList QMimeBinaryProvider::globPatterns(const QString &name)
+{
+    MimeTypeExtraMap::const_iterator it = loadMimeTypeExtra(name);
+    if (it != m_mimetypeExtra.constEnd()) {
+        const MimeTypeExtra &e = it.value();
+        return e.globPatterns;
+    }
+    return {};
+}
+
+QMimeBinaryProvider::MimeTypeExtraMap::const_iterator
+QMimeBinaryProvider::loadMimeTypeExtra(const QString &mimeName)
+{
+#if QT_CONFIG(xmlstreamreader)
+    auto it = m_mimetypeExtra.constFind(mimeName);
     if (it == m_mimetypeExtra.constEnd()) {
         // load comment and globPatterns
 
         // shared-mime-info since 1.3 lowercases the xml files
-        QString mimeFile = m_directory + u'/' + data.name.toLower() + ".xml"_L1;
+        QString mimeFile = m_directory + u'/' + mimeName.toLower() + ".xml"_L1;
         if (!QFile::exists(mimeFile))
-            mimeFile = m_directory + u'/' + data.name + ".xml"_L1; // pre-1.3
+            mimeFile = m_directory + u'/' + mimeName + ".xml"_L1; // pre-1.3
 
         QFile qfile(mimeFile);
         if (!qfile.open(QFile::ReadOnly))
-            return false;
+            return m_mimetypeExtra.constEnd();
 
-        auto insertIt = m_mimetypeExtra.insert(data.name, MimeTypeExtra{});
+        auto insertIt = m_mimetypeExtra.insert(mimeName, MimeTypeExtra{});
         it = insertIt;
         MimeTypeExtra &extra = insertIt.value();
         QString mainPattern;
@@ -516,13 +530,13 @@ bool QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
         QXmlStreamReader xml(&qfile);
         if (xml.readNextStartElement()) {
             if (xml.name() != "mime-type"_L1) {
-                return false;
+                return m_mimetypeExtra.constEnd();
             }
             const auto name = xml.attributes().value("type"_L1);
             if (name.isEmpty())
-                return false;
-            if (name.compare(data.name, Qt::CaseInsensitive))
-                qWarning() << "Got name" << name << "in file" << mimeFile << "expected" << data.name;
+                return m_mimetypeExtra.constEnd();
+            if (name.compare(mimeName, Qt::CaseInsensitive))
+                qWarning() << "Got name" << name << "in file" << mimeFile << "expected" << mimeName;
 
             while (xml.readNextStartElement()) {
                 const auto tag = xml.name();
@@ -535,8 +549,7 @@ bool QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
                     extra.localeComments.insert(lang, text);
                     continue; // we called readElementText, so we're at the EndElement already.
                 } else if (tag == "glob-deleteall"_L1) { // as written out by shared-mime-info >= 0.70
-                    extra.globPatterns.clear();
-                    mainPattern.clear();
+                    extra.hasGlobDeleteAll = true;
                 } else if (tag == "glob"_L1) { // as written out by shared-mime-info >= 0.70
                     const QString pattern = xml.attributes().value("pattern"_L1).toString();
                     if (mainPattern.isEmpty() && pattern.startsWith(u'*')) {
@@ -558,14 +571,11 @@ bool QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
             extra.globPatterns.prepend(mainPattern);
         }
     }
-    const MimeTypeExtra &e = it.value();
-    data.localeComments = e.localeComments;
-    data.globPatterns = e.globPatterns;
-    return true;
+    return it;
 #else
-    Q_UNUSED(data);
+    Q_UNUSED(mimeName);
     qWarning("Cannot load mime type since QXmlStreamReader is not available.");
-    return false;
+    return m_mimetypeExtra.constEnd();
 #endif // feature xmlstreamreader
 }
 
@@ -595,22 +605,16 @@ QLatin1StringView QMimeBinaryProvider::iconForMime(CacheFile *cacheFile, int pos
     return QLatin1StringView();
 }
 
-void QMimeBinaryProvider::loadIcon(QMimeTypePrivate &data)
+QString QMimeBinaryProvider::icon(const QString &name)
 {
-    const QByteArray inputMime = data.name.toLatin1();
-    const QLatin1StringView icon = iconForMime(m_cacheFile.get(), PosIconsListOffset, inputMime);
-    if (!icon.isEmpty()) {
-        data.iconName = icon;
-    }
+    const QByteArray inputMime = name.toLatin1();
+    return iconForMime(m_cacheFile.get(), PosIconsListOffset, inputMime);
 }
 
-void QMimeBinaryProvider::loadGenericIcon(QMimeTypePrivate &data)
+QString QMimeBinaryProvider::genericIcon(const QString &name)
 {
-    const QByteArray inputMime = data.name.toLatin1();
-    const QLatin1StringView icon = iconForMime(m_cacheFile.get(), PosGenericIconsListOffset, inputMime);
-    if (!icon.isEmpty()) {
-        data.genericIconName = icon;
-    }
+    const QByteArray inputMime = name.toLatin1();
+    return iconForMime(m_cacheFile.get(), PosGenericIconsListOffset, inputMime);
 }
 
 ////
@@ -695,9 +699,9 @@ bool QMimeXMLProvider::isInternalDatabase() const
 #endif
 }
 
-QMimeType QMimeXMLProvider::mimeTypeForName(const QString &name)
+bool QMimeXMLProvider::knowsMimeType(const QString &name)
 {
-    return m_nameMimeTypeMap.value(name);
+    return m_nameMimeTypeMap.contains(name);
 }
 
 void QMimeXMLProvider::addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result)
@@ -705,22 +709,17 @@ void QMimeXMLProvider::addFileNameMatches(const QString &fileName, QMimeGlobMatc
     m_mimeTypeGlobs.matchingGlobs(fileName, result);
 }
 
-void QMimeXMLProvider::findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate)
+void QMimeXMLProvider::findByMagic(const QByteArray &data, int *accuracyPtr, QString *candidate)
 {
-    QString candidateName;
-    bool foundOne = false;
     for (const QMimeMagicRuleMatcher &matcher : std::as_const(m_magicMatchers)) {
         if (matcher.matches(data)) {
             const int priority = matcher.priority();
             if (priority > *accuracyPtr) {
                 *accuracyPtr = priority;
-                candidateName = matcher.mimetype();
-                foundOne = true;
+                *candidate = matcher.mimetype();
             }
         }
     }
-    if (foundOne)
-        candidate = mimeTypeForName(candidateName);
 }
 
 void QMimeXMLProvider::ensureLoaded()
@@ -750,6 +749,31 @@ void QMimeXMLProvider::ensureLoaded()
         load(file);
 }
 
+QMimeTypePrivate::LocaleHash QMimeXMLProvider::localeComments(const QString &name)
+{
+    return m_nameMimeTypeMap.value(name).localeComments;
+}
+
+bool QMimeXMLProvider::hasGlobDeleteAll(const QString &name)
+{
+    return m_nameMimeTypeMap.value(name).hasGlobDeleteAll;
+}
+
+QStringList QMimeXMLProvider::globPatterns(const QString &name)
+{
+    return m_nameMimeTypeMap.value(name).globPatterns;
+}
+
+QString QMimeXMLProvider::icon(const QString &name)
+{
+    return m_nameMimeTypeMap.value(name).iconName;
+}
+
+QString QMimeXMLProvider::genericIcon(const QString &name)
+{
+    return m_nameMimeTypeMap.value(name).genericIconName;
+}
+
 void QMimeXMLProvider::load(const QString &fileName)
 {
     QString errorMessage;
@@ -791,14 +815,11 @@ void QMimeXMLProvider::addGlobPattern(const QMimeGlobPattern &glob)
     m_mimeTypeGlobs.addGlob(glob);
 }
 
-void QMimeXMLProvider::addMimeType(const QMimeType &mt)
+void QMimeXMLProvider::addMimeType(const QMimeTypeXMLData &mt)
 {
-    Q_ASSERT(!mt.d.data()->fromCache);
-
-    QString name = mt.name();
-    if (mt.d->hasGlobDeleteAll)
-        appendIfNew(m_mimeTypesWithDeletedGlobs, name);
-    m_nameMimeTypeMap.insert(mt.name(), mt);
+    if (mt.hasGlobDeleteAll)
+        appendIfNew(m_mimeTypesWithDeletedGlobs, mt.name);
+    m_nameMimeTypeMap.insert(mt.name, mt);
 }
 
 /*
@@ -814,7 +835,7 @@ void QMimeXMLProvider::excludeMimeTypeGlobs(const QStringList &toExclude)
     for (const auto &mt : toExclude) {
         auto it = m_nameMimeTypeMap.find(mt);
         if (it != m_nameMimeTypeMap.end())
-            it->d->globPatterns.clear();
+            it->globPatterns.clear();
         m_mimeTypeGlobs.removeMimeType(mt);
     }
 }
@@ -854,13 +875,16 @@ void QMimeXMLProvider::addAlias(const QString &alias, const QString &name)
 void QMimeXMLProvider::addAllMimeTypes(QList<QMimeType> &result)
 {
     if (result.isEmpty()) { // fast path
-        result = m_nameMimeTypeMap.values();
+        for (auto it = m_nameMimeTypeMap.constBegin(), end = m_nameMimeTypeMap.constEnd();
+             it != end; ++it) {
+            result.append(QMimeType(QMimeTypePrivate(it.value().name)));
+        }
     } else {
         for (auto it = m_nameMimeTypeMap.constBegin(), end = m_nameMimeTypeMap.constEnd() ; it != end ; ++it) {
             const QString newMime = it.key();
             if (std::find_if(result.constBegin(), result.constEnd(), [newMime](const QMimeType &mime) -> bool { return mime.name() == newMime; })
                     == result.constEnd())
-                result.append(it.value());
+                result.append(QMimeType(QMimeTypePrivate(it.value().name)));
         }
     }
 }
diff --git a/src/corelib/mimetypes/qmimeprovider_p.h b/src/corelib/mimetypes/qmimeprovider_p.h
index e498cf8c39..755737eaaf 100644
--- a/src/corelib/mimetypes/qmimeprovider_p.h
+++ b/src/corelib/mimetypes/qmimeprovider_p.h
@@ -28,6 +28,7 @@ QT_REQUIRE_CONFIG(mimetype);
 QT_BEGIN_NAMESPACE
 
 class QMimeMagicRuleMatcher;
+class QMimeTypeXMLData;
 
 class QMimeProviderBase
 {
@@ -39,18 +40,20 @@ public:
 
     virtual bool isValid() = 0;
     virtual bool isInternalDatabase() const = 0;
-    virtual QMimeType mimeTypeForName(const QString &name) = 0;
+    virtual bool knowsMimeType(const QString &name) = 0;
     virtual void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) = 0;
     virtual void addParents(const QString &mime, QStringList &result) = 0;
     virtual QString resolveAlias(const QString &name) = 0;
     virtual void addAliases(const QString &name, QStringList &result) = 0;
-    virtual void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) = 0;
+    virtual void findByMagic(const QByteArray &data, int *accuracyPtr, QString *candidate) = 0;
     virtual void addAllMimeTypes(QList<QMimeType> &result) = 0;
-    virtual bool loadMimeTypePrivate(QMimeTypePrivate &) { return false; }
-    virtual void loadIcon(QMimeTypePrivate &) {}
-    virtual void loadGenericIcon(QMimeTypePrivate &) {}
-    virtual void ensureLoaded() {}
-    virtual void excludeMimeTypeGlobs(const QStringList &) {}
+    virtual QMimeTypePrivate::LocaleHash localeComments(const QString &name) = 0;
+    virtual bool hasGlobDeleteAll(const QString &name) = 0;
+    virtual QStringList globPatterns(const QString &name) = 0;
+    virtual QString icon(const QString &name) = 0;
+    virtual QString genericIcon(const QString &name) = 0;
+    virtual void ensureLoaded() { }
+    virtual void excludeMimeTypeGlobs(const QStringList &) { }
 
     QString directory() const { return m_directory; }
 
@@ -60,9 +63,9 @@ public:
     /*
         MimeTypes with "glob-deleteall" tags are handled differently by each provider
         sub-class:
-        - QMimeBinaryProvider parses glob-deleteall tags lazily, i.e. only when loadMimeTypePrivate()
+        - QMimeBinaryProvider parses glob-deleteall tags lazily, i.e. only when hasGlobDeleteAll()
           is called, and clears the glob patterns associated with mimetypes that have this tag
-        - QMimeXMLProvider parses glob-deleteall from the the start, i.e. when a XML file is
+        - QMimeXMLProvider parses glob-deleteall from the start, i.e. when a XML file is
           parsed with QMimeTypeParser
 
         The two lists below are used to let both provider types (XML and Binary) communicate
@@ -95,16 +98,18 @@ public:
 
     bool isValid() override;
     bool isInternalDatabase() const override;
-    QMimeType mimeTypeForName(const QString &name) override;
+    bool knowsMimeType(const QString &name) override;
     void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) override;
     void addParents(const QString &mime, QStringList &result) override;
     QString resolveAlias(const QString &name) override;
     void addAliases(const QString &name, QStringList &result) override;
-    void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) override;
+    void findByMagic(const QByteArray &data, int *accuracyPtr, QString *candidate) override;
     void addAllMimeTypes(QList<QMimeType> &result) override;
-    bool loadMimeTypePrivate(QMimeTypePrivate &) override;
-    void loadIcon(QMimeTypePrivate &) override;
-    void loadGenericIcon(QMimeTypePrivate &) override;
+    QMimeTypePrivate::LocaleHash localeComments(const QString &name) override;
+    bool hasGlobDeleteAll(const QString &name) override;
+    QStringList globPatterns(const QString &name) override;
+    QString icon(const QString &name) override;
+    QString genericIcon(const QString &name) override;
     void ensureLoaded() override;
     void excludeMimeTypeGlobs(const QStringList &toExclude) override;
 
@@ -116,8 +121,9 @@ private:
     bool matchSuffixTree(QMimeGlobMatchResult &result, CacheFile *cacheFile, int numEntries,
                          int firstOffset, const QString &fileName, qsizetype charPos,
                          bool caseSensitiveCheck);
-    bool matchMagicRule(CacheFile *cacheFile, int numMatchlets, int firstOffset, const QByteArray &data);
     bool isMimeTypeGlobsExcluded(const char *name);
+    bool matchMagicRule(CacheFile *cacheFile, int numMatchlets, int firstOffset,
+                        const QByteArray &data);
     QLatin1StringView iconForMime(CacheFile *cacheFile, int posListOffset, const QByteArray &inputMime);
     void loadMimeTypeList();
     bool checkCacheChanged();
@@ -128,11 +134,14 @@ private:
     bool m_mimetypeListLoaded;
     struct MimeTypeExtra
     {
-        // Both retrieved on demand in loadMimeTypePrivate
         QHash<QString, QString> localeComments;
         QStringList globPatterns;
+        bool hasGlobDeleteAll = false;
     };
-    QMap<QString, MimeTypeExtra> m_mimetypeExtra;
+    using MimeTypeExtraMap = QMap<QString, MimeTypeExtra>;
+    MimeTypeExtraMap m_mimetypeExtra;
+
+    MimeTypeExtraMap::const_iterator loadMimeTypeExtra(const QString &mimeName);
 };
 
 /*
@@ -153,19 +162,24 @@ public:
 
     bool isValid() override;
     bool isInternalDatabase() const override;
-    QMimeType mimeTypeForName(const QString &name) override;
+    bool knowsMimeType(const QString &name) override;
     void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) override;
     void addParents(const QString &mime, QStringList &result) override;
     QString resolveAlias(const QString &name) override;
     void addAliases(const QString &name, QStringList &result) override;
-    void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) override;
+    void findByMagic(const QByteArray &data, int *accuracyPtr, QString *candidate) override;
     void addAllMimeTypes(QList<QMimeType> &result) override;
     void ensureLoaded() override;
+    QMimeTypePrivate::LocaleHash localeComments(const QString &name) override;
+    bool hasGlobDeleteAll(const QString &name) override;
+    QStringList globPatterns(const QString &name) override;
+    QString icon(const QString &name) override;
+    QString genericIcon(const QString &name) override;
 
     bool load(const QString &fileName, QString *errorMessage);
 
     // Called by the mimetype xml parser
-    void addMimeType(const QMimeType &mt);
+    void addMimeType(const QMimeTypeXMLData &mt);
     void excludeMimeTypeGlobs(const QStringList &toExclude) override;
     void addGlobPattern(const QMimeGlobPattern &glob);
     void addParent(const QString &child, const QString &parent);
@@ -176,7 +190,7 @@ private:
     void load(const QString &fileName);
     void load(const char *data, qsizetype len);
 
-    typedef QHash<QString, QMimeType> NameMimeTypeMap;
+    typedef QHash<QString, QMimeTypeXMLData> NameMimeTypeMap;
     NameMimeTypeMap m_nameMimeTypeMap;
 
     typedef QHash<QString, QString> AliasHash;
diff --git a/src/corelib/mimetypes/qmimetype.cpp b/src/corelib/mimetypes/qmimetype.cpp
index 39cdfaec5e..543fbeb28c 100644
--- a/src/corelib/mimetypes/qmimetype.cpp
+++ b/src/corelib/mimetypes/qmimetype.cpp
@@ -6,9 +6,6 @@
 
 #include "qmimetype_p.h"
 #include "qmimedatabase_p.h"
-#include "qmimeprovider_p.h"
-
-#include "qmimeglobpattern_p.h"
 
 #include <QtCore/QDebug>
 #include <QtCore/QLocale>
@@ -20,33 +17,6 @@ QT_BEGIN_NAMESPACE
 
 using namespace Qt::StringLiterals;
 
-QMimeTypePrivate::QMimeTypePrivate()
-    : loaded(false), fromCache(false)
-{}
-
-QMimeTypePrivate::QMimeTypePrivate(const QMimeType &other)
-      : loaded(other.d->loaded),
-        name(other.d->name),
-        localeComments(other.d->localeComments),
-        genericIconName(other.d->genericIconName),
-        iconName(other.d->iconName),
-        globPatterns(other.d->globPatterns)
-{}
-
-void QMimeTypePrivate::clear()
-{
-    name.clear();
-    localeComments.clear();
-    genericIconName.clear();
-    iconName.clear();
-    globPatterns.clear();
-}
-
-void QMimeTypePrivate::addGlobPattern(const QString &pattern)
-{
-    globPatterns.append(pattern);
-}
-
 /*!
     \class QMimeType
     \inmodule QtCore
@@ -219,7 +189,7 @@ QString QMimeType::name() const
  */
 QString QMimeType::comment() const
 {
-    QMimeDatabasePrivate::instance()->loadMimeTypePrivate(const_cast<QMimeTypePrivate&>(*d));
+    const auto localeComments = QMimeDatabasePrivate::instance()->localeComments(d->name);
 
     QStringList languageList = QLocale().uiLanguages(QLocale::TagSeparator::Underscore);
     qsizetype defaultIndex = languageList.indexOf(u"en_US"_s);
@@ -242,13 +212,13 @@ QString QMimeType::comment() const
 
     for (const QString &language : std::as_const(languageList)) {
         const QString lang = language == "C"_L1 ? u"en_US"_s : language;
-        QString comm = d->localeComments.value(lang);
+        QString comm = localeComments.value(lang);
         if (!comm.isEmpty())
             return comm;
         const qsizetype cut = lang.indexOf(u'_');
         // If "de_CH" is missing, check for "de" (and similar):
         if (cut != -1) {
-            comm = d->localeComments.value(lang.left(cut));
+            comm = localeComments.value(lang.left(cut));
             if (!comm.isEmpty())
                 return comm;
         }
@@ -274,8 +244,8 @@ QString QMimeType::comment() const
  */
 QString QMimeType::genericIconName() const
 {
-    QMimeDatabasePrivate::instance()->loadGenericIcon(const_cast<QMimeTypePrivate&>(*d));
-    if (d->genericIconName.isEmpty()) {
+    QString genericIconName = QMimeDatabasePrivate::instance()->genericIcon(d->name);
+    if (genericIconName.isEmpty()) {
         // From the spec:
         // If the generic icon name is empty (not specified by the mimetype definition)
         // then the mimetype is used to generate the generic icon by using the top-level
@@ -288,7 +258,7 @@ QString QMimeType::genericIconName() const
             groupRef = groupRef.left(slashindex);
         return groupRef + "-x-generic"_L1;
     }
-    return d->genericIconName;
+    return genericIconName;
 }
 
 static QString make_default_icon_name_from_mimetype_name(QString iconName)
@@ -310,11 +280,11 @@ static QString make_default_icon_name_from_mimetype_name(QString iconName)
  */
 QString QMimeType::iconName() const
 {
-    QMimeDatabasePrivate::instance()->loadIcon(const_cast<QMimeTypePrivate&>(*d));
-    if (d->iconName.isEmpty()) {
+    QString iconName = QMimeDatabasePrivate::instance()->icon(d->name);
+    if (iconName.isEmpty()) {
         return make_default_icon_name_from_mimetype_name(name());
     }
-    return d->iconName;
+    return iconName;
 }
 
 /*!
@@ -326,8 +296,7 @@ QString QMimeType::iconName() const
  */
 QStringList QMimeType::globPatterns() const
 {
-    QMimeDatabasePrivate::instance()->loadMimeTypePrivate(const_cast<QMimeTypePrivate&>(*d));
-    return d->globPatterns;
+    return QMimeDatabasePrivate::instance()->globPatterns(d->name);
 }
 
 /*!
@@ -421,10 +390,11 @@ QStringList QMimeType::aliases() const
  */
 QStringList QMimeType::suffixes() const
 {
-    QMimeDatabasePrivate::instance()->loadMimeTypePrivate(const_cast<QMimeTypePrivate&>(*d));
+    const QStringList patterns = globPatterns();
 
     QStringList result;
-    for (const QString &pattern : std::as_const(d->globPatterns)) {
+    result.reserve(patterns.size());
+    for (const QString &pattern : patterns) {
         // Not a simple suffix if it looks like: README or *. or *.* or *.JP*G or *.JP?
         if (pattern.startsWith("*."_L1) &&
             pattern.size() > 2 &&
@@ -464,15 +434,15 @@ QString QMimeType::preferredSuffix() const
 */
 QString QMimeType::filterString() const
 {
-    QMimeDatabasePrivate::instance()->loadMimeTypePrivate(const_cast<QMimeTypePrivate&>(*d));
+    const QStringList patterns = globPatterns();
     QString filter;
 
-    if (!d->globPatterns.empty()) {
+    if (!patterns.empty()) {
         filter += comment() + " ("_L1;
-        for (int i = 0; i < d->globPatterns.size(); ++i) {
+        for (int i = 0; i < patterns.size(); ++i) {
             if (i != 0)
                 filter += u' ';
-            filter += d->globPatterns.at(i);
+            filter += patterns.at(i);
         }
         filter +=  u')';
     }
diff --git a/src/corelib/mimetypes/qmimetype_p.h b/src/corelib/mimetypes/qmimetype_p.h
index 7b5ed77f40..b6040098a9 100644
--- a/src/corelib/mimetypes/qmimetype_p.h
+++ b/src/corelib/mimetypes/qmimetype_p.h
@@ -16,13 +16,14 @@
 //
 
 #include <QtCore/private/qglobal_p.h>
-#include "qmimetype.h"
+#include <QtCore/qshareddata.h>
 
 QT_REQUIRE_CONFIG(mimetype);
 
 #include <QtCore/qhash.h>
 #include <QtCore/qstringlist.h>
 
+class QMimeBinaryProvider;
 QT_BEGIN_NAMESPACE
 
 class Q_AUTOTEST_EXPORT QMimeTypePrivate : public QSharedData
@@ -30,42 +31,12 @@ class Q_AUTOTEST_EXPORT QMimeTypePrivate : public QSharedData
 public:
     typedef QHash<QString, QString> LocaleHash;
 
-    QMimeTypePrivate();
-    explicit QMimeTypePrivate(const QMimeType &other);
+    QMimeTypePrivate() { }
+    explicit QMimeTypePrivate(const QString &name) : name(name) { }
 
-    void clear();
-
-    void addGlobPattern(const QString &pattern);
-
-    bool loaded; // QSharedData leaves a 4 byte gap, so don't put 8 byte members first
-    bool fromCache; // true if this comes from the binary provider
-    bool hasGlobDeleteAll = false; // true if the mimetype has a glob-deleteall tag
     QString name;
-    LocaleHash localeComments;
-    QString genericIconName;
-    QString iconName;
-    QStringList globPatterns;
 };
 
 QT_END_NAMESPACE
 
-#define QMIMETYPE_BUILDER_FROM_RVALUE_REFS \
-    QT_BEGIN_NAMESPACE \
-    static QMimeType buildQMimeType ( \
-                         QString &&name, \
-                         QString &&genericIconName, \
-                         QString &&iconName, \
-                         QStringList &&globPatterns \
-                     ) \
-    { \
-        QMimeTypePrivate qMimeTypeData; \
-        qMimeTypeData.loaded = true; \
-        qMimeTypeData.name = std::move(name); \
-        qMimeTypeData.genericIconName = std::move(genericIconName); \
-        qMimeTypeData.iconName = std::move(iconName); \
-        qMimeTypeData.globPatterns = std::move(globPatterns); \
-        return QMimeType(qMimeTypeData); \
-    } \
-    QT_END_NAMESPACE
-
-#endif   // QMIMETYPE_P_H
+#endif // QMIMETYPE_P_H
diff --git a/src/corelib/mimetypes/qmimetypeparser.cpp b/src/corelib/mimetypes/qmimetypeparser.cpp
index 66cbc32b5c..3f1e53b25d 100644
--- a/src/corelib/mimetypes/qmimetypeparser.cpp
+++ b/src/corelib/mimetypes/qmimetypeparser.cpp
@@ -165,8 +165,7 @@ static CreateMagicMatchRuleResult createMagicMatchRule(const QXmlStreamAttribute
 bool QMimeTypeParserBase::parse(QIODevice *dev, const QString &fileName, QString *errorMessage)
 {
 #if QT_CONFIG(xmlstreamreader)
-    QMimeTypePrivate data;
-    data.loaded = true;
+    QMimeTypeXMLData data;
     int priority = 50;
     QStack<QMimeMagicRule *> currentRules; // stack for the nesting of rules
     QList<QMimeMagicRule> rules; // toplevel rules
@@ -273,7 +272,7 @@ bool QMimeTypeParserBase::parse(QIODevice *dev, const QString &fileName, QString
         {
             const auto elementName = reader.name();
             if (elementName == QLatin1StringView(mimeTypeTagC)) {
-                if (!process(QMimeType(data), errorMessage))
+                if (!process(data, errorMessage))
                     return false;
                 data.clear();
             } else if (elementName == QLatin1StringView(matchTagC)) {
@@ -314,4 +313,19 @@ bool QMimeTypeParserBase::parse(QIODevice *dev, const QString &fileName, QString
 #endif // feature xmlstreamreader
 }
 
+void QMimeTypeXMLData::clear()
+{
+    hasGlobDeleteAll = false;
+    name.clear();
+    localeComments.clear();
+    genericIconName.clear();
+    iconName.clear();
+    globPatterns.clear();
+}
+
+void QMimeTypeXMLData::addGlobPattern(const QString &pattern)
+{
+    globPatterns.append(pattern);
+}
+
 QT_END_NAMESPACE
diff --git a/src/corelib/mimetypes/qmimetypeparser_p.h b/src/corelib/mimetypes/qmimetypeparser_p.h
index c9698e149f..d4266ffcc0 100644
--- a/src/corelib/mimetypes/qmimetypeparser_p.h
+++ b/src/corelib/mimetypes/qmimetypeparser_p.h
@@ -16,7 +16,7 @@
 // We mean it.
 //
 
-#include "qmimedatabase_p.h"
+#include <QtCore/qtconfigmacros.h>
 
 QT_REQUIRE_CONFIG(mimetype);
 
@@ -24,6 +24,21 @@ QT_REQUIRE_CONFIG(mimetype);
 
 QT_BEGIN_NAMESPACE
 
+class QMimeTypeXMLData
+{
+public:
+    void clear();
+
+    void addGlobPattern(const QString &pattern);
+
+    bool hasGlobDeleteAll = false; // true if the mimetype has a glob-deleteall tag
+    QString name;
+    QMimeTypePrivate::LocaleHash localeComments;
+    QString genericIconName; // TODO move to a struct that's specific to the XML provider
+    QString iconName; // TODO move to a struct that's specific to the XML provider
+    QStringList globPatterns;
+};
+
 class QIODevice;
 
 class QMimeTypeParserBase
@@ -39,7 +54,7 @@ public:
     static bool parseNumber(QStringView n, int *target, QString *errorMessage);
 
 protected:
-    virtual bool process(const QMimeType &t, QString *errorMessage) = 0;
+    virtual bool process(const QMimeTypeXMLData &t, QString *errorMessage) = 0;
     virtual bool process(const QMimeGlobPattern &t, QString *errorMessage) = 0;
     virtual void processParent(const QString &child, const QString &parent) = 0;
     virtual void processAlias(const QString &alias, const QString &name) = 0;
@@ -73,7 +88,7 @@ public:
     explicit QMimeTypeParser(QMimeXMLProvider &provider) : m_provider(provider) {}
 
 protected:
-    inline bool process(const QMimeType &t, QString *) override
+    inline bool process(const QMimeTypeXMLData &t, QString *) override
     { m_provider.addMimeType(t); return true; }
 
     inline bool process(const QMimeGlobPattern &glob, QString *) override
diff --git a/tests/auto/corelib/mimetypes/qmimedatabase/add-extension.xml b/tests/auto/corelib/mimetypes/qmimedatabase/add-extension.xml
new file mode 100644
index 0000000000..c4141e0f70
--- /dev/null
+++ b/tests/auto/corelib/mimetypes/qmimedatabase/add-extension.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+  <mime-type type="image/jpeg">
+    <glob pattern="*.jnewext"/>
+    <comment>JPEG Image</comment>
+  </mime-type>
+</mime-info>
diff --git a/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-cache/CMakeLists.txt b/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-cache/CMakeLists.txt
index 7d83bd2c2f..9a70666b07 100644
--- a/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-cache/CMakeLists.txt
+++ b/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-cache/CMakeLists.txt
@@ -30,6 +30,7 @@ qt_internal_add_test(tst_qmimedatabase-cache
     #"mime/packages/freedesktop.org.xml"
 #)
 set(testdata_resource_files
+    "../add-extension.xml"
     "../invalid-magic1.xml"
     "../invalid-magic2.xml"
     "../invalid-magic3.xml"
diff --git a/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-xml/CMakeLists.txt b/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-xml/CMakeLists.txt
index e9819cbb1e..205d3c362b 100644
--- a/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-xml/CMakeLists.txt
+++ b/tests/auto/corelib/mimetypes/qmimedatabase/qmimedatabase-xml/CMakeLists.txt
@@ -30,6 +30,7 @@ qt_internal_add_test(tst_qmimedatabase-xml
     #"mime/packages/freedesktop.org.xml"
 #)
 set(testdata_resource_files
+    "../add-extension.xml"
     "../invalid-magic1.xml"
     "../invalid-magic2.xml"
     "../invalid-magic3.xml"
diff --git a/tests/auto/corelib/mimetypes/qmimedatabase/tst_qmimedatabase.cpp b/tests/auto/corelib/mimetypes/qmimedatabase/tst_qmimedatabase.cpp
index afd31210b2..660ebf9680 100644
--- a/tests/auto/corelib/mimetypes/qmimedatabase/tst_qmimedatabase.cpp
+++ b/tests/auto/corelib/mimetypes/qmimedatabase/tst_qmimedatabase.cpp
@@ -38,6 +38,7 @@ static const std::array additionalGlobalMimeFiles = {
 };
 
 static const std::array additionalLocalMimeFiles = {
+    "add-extension.xml", // adds *.jnewext to image/jpeg
     "yast2-metapackage-handler-mimetypes.xml",
     "qml-again.xml",
     "text-x-objcsrc.xml",
@@ -1229,6 +1230,11 @@ void tst_QMimeDatabase::installNewLocalMimeType()
         QCOMPARE(mimes.at(0).name(), u"video/webm");
     }
 
+    // QTBUG-116905: globPatterns() should merge all locations
+    // add-extension.xml adds *.jnewext
+    const QStringList expectedJpegPatterns{ "*.jpg", "*.jpeg", "*.jpe", "*.jnewext" };
+    QCOMPARE(db.mimeTypeForName(QStringLiteral("image/jpeg")).globPatterns(), expectedJpegPatterns);
+
     // Now that we have two directories with mime definitions, check that everything still works
     inheritance();
     if (QTest::currentTestFailed())
diff --git a/tests/auto/corelib/mimetypes/qmimetype/tst_qmimetype.cpp b/tests/auto/corelib/mimetypes/qmimetype/tst_qmimetype.cpp
index fda12298fe..50183ca4e0 100644
--- a/tests/auto/corelib/mimetypes/qmimetype/tst_qmimetype.cpp
+++ b/tests/auto/corelib/mimetypes/qmimetype/tst_qmimetype.cpp
@@ -21,7 +21,6 @@ private slots:
     void name();
     void genericIconName();
     void iconName();
-    void suffixes();
     void gadget();
 };
 
@@ -36,52 +35,15 @@ void tst_qmimetype::initTestCase()
 
 static QString qMimeTypeName()
 {
-    static const QString result ("No name of the MIME type");
+    static const QString result("group/fake-mime");
     return result;
 }
 
-static QString qMimeTypeGenericIconName()
-{
-    static const QString result ("No file name of an icon image that represents the MIME type");
-    return result;
-}
-
-static QString qMimeTypeIconName()
-{
-    static const QString result ("No file name of an icon image that represents the MIME type");
-    return result;
-}
-
-static QStringList buildQMimeTypeFilenameExtensions()
-{
-    QStringList result;
-    result << QString::fromLatin1("*.png");
-    return result;
-}
-
-static QStringList qMimeTypeGlobPatterns()
-{
-    static const QStringList result (buildQMimeTypeFilenameExtensions());
-    return result;
-}
-
-// ------------------------------------------------------------------------------------------------
-
-QMIMETYPE_BUILDER_FROM_RVALUE_REFS
-
 // ------------------------------------------------------------------------------------------------
 
 void tst_qmimetype::isValid()
 {
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
-
+    QMimeType instantiatedQMimeType{ QMimeTypePrivate(qMimeTypeName()) };
     QVERIFY(instantiatedQMimeType.isValid());
 
     QMimeType otherQMimeType (instantiatedQMimeType);
@@ -98,23 +60,8 @@ void tst_qmimetype::isValid()
 
 void tst_qmimetype::name()
 {
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
-
-    QMimeType otherQMimeType (
-                  buildQMimeType (
-                      QString(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
+    QMimeType instantiatedQMimeType{ QMimeTypePrivate(qMimeTypeName()) };
+    QMimeType otherQMimeType{ QMimeTypePrivate(QString()) };
 
     // Verify that the Name is part of the equality test:
     QCOMPARE(instantiatedQMimeType.name(), qMimeTypeName());
@@ -127,63 +74,23 @@ void tst_qmimetype::name()
 
 void tst_qmimetype::genericIconName()
 {
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
-
-    QCOMPARE(instantiatedQMimeType.genericIconName(), qMimeTypeGenericIconName());
+    const QMimeType instantiatedQMimeType{ QMimeTypePrivate(qMimeTypeName()) };
+    QCOMPARE(instantiatedQMimeType.genericIconName(), "group-x-generic");
 }
 
 // ------------------------------------------------------------------------------------------------
 
 void tst_qmimetype::iconName()
 {
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
-
-    QCOMPARE(instantiatedQMimeType.iconName(), qMimeTypeIconName());
-}
-
-// ------------------------------------------------------------------------------------------------
-
-void tst_qmimetype::suffixes()
-{
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
-
-    QCOMPARE(instantiatedQMimeType.globPatterns(), qMimeTypeGlobPatterns());
-    QCOMPARE(instantiatedQMimeType.suffixes(), QStringList() << QString::fromLatin1("png"));
+    const QMimeType instantiatedQMimeType{ QMimeTypePrivate(qMimeTypeName()) };
+    QCOMPARE(instantiatedQMimeType.iconName(), "group-fake-mime");
 }
 
 // ------------------------------------------------------------------------------------------------
 
 void tst_qmimetype::gadget()
 {
-    QMimeType instantiatedQMimeType (
-                  buildQMimeType (
-                      qMimeTypeName(),
-                      qMimeTypeGenericIconName(),
-                      qMimeTypeIconName(),
-                      qMimeTypeGlobPatterns()
-                  )
-              );
+    QMimeType instantiatedQMimeType = QMimeDatabase().mimeTypeForName("text/plain");
 
     const QMetaObject *metaObject = &instantiatedQMimeType.staticMetaObject;