Clang: Improve updating

If project parts are up to date we send them directly to the indexer, so
the indexer can decide we something needs an update.

Change-Id: I7d4f32794c6b3a861cdefb3653a6dfd4e711f619
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

27 files changed, 154 insertions, 283 deletions

diff --git a/src/libs/clangsupport/clangsupport-lib.pri b/src/libs/clangsupport/clangsupport-lib.pri
index 201c5bf538..df537f5848 100644
--- a/src/libs/clangsupport/clangsupport-lib.pri
+++ b/src/libs/clangsupport/clangsupport-lib.pri
@@ -204,7 +204,6 @@ HEADERS += \
     $$PWD/nativefilepath.h \
     $$PWD/filepathview.h \
     $$PWD/compilermacro.h \
-    $$PWD/projectpartpchproviderinterface.h \
     $$PWD/updategeneratedfilesmessage.h \
     $$PWD/removegeneratedfilesmessage.h \
     $$PWD/generatedfiles.h \
diff --git a/src/libs/clangsupport/precompiledheadersupdatedmessage.h b/src/libs/clangsupport/precompiledheadersupdatedmessage.h
index 9c17a3c9da..5bd24dcd49 100644
--- a/src/libs/clangsupport/precompiledheadersupdatedmessage.h
+++ b/src/libs/clangsupport/precompiledheadersupdatedmessage.h
@@ -25,7 +25,10 @@
 
 #pragma once
 
-#include "projectpartpch.h"
+#include "clangsupport_global.h"
+#include "projectpartid.h"
+
+#include <utils/smallstringio.h>
 
 namespace ClangBackEnd {
 
@@ -33,29 +36,26 @@ class PrecompiledHeadersUpdatedMessage
 {
 public:
     PrecompiledHeadersUpdatedMessage() = default;
-    PrecompiledHeadersUpdatedMessage(ProjectPartPch projectPartPch)
+    PrecompiledHeadersUpdatedMessage(ProjectPartId projectPartId)
     {
-        projectPartPchs.push_back(projectPartPch);
+        projectPartIds.push_back(projectPartId);
     }
-    PrecompiledHeadersUpdatedMessage(ProjectPartPchs &&projectPartPchs)
-        : projectPartPchs(std::move(projectPartPchs))
+    PrecompiledHeadersUpdatedMessage(ProjectPartIds &&projectPartIds)
+        : projectPartIds(std::move(projectPartIds))
     {}
 
-    ProjectPartPchs takeProjectPartPchs() const
-    {
-        return std::move(projectPartPchs);
-    }
+    ProjectPartIds takeProjectPartIds() const { return std::move(projectPartIds); }
 
     friend QDataStream &operator<<(QDataStream &out, const PrecompiledHeadersUpdatedMessage &message)
     {
-        out << message.projectPartPchs;
+        out << message.projectPartIds;
 
         return out;
     }
 
     friend QDataStream &operator>>(QDataStream &in, PrecompiledHeadersUpdatedMessage &message)
     {
-        in >> message.projectPartPchs;
+        in >> message.projectPartIds;
 
         return in;
     }
@@ -63,16 +63,13 @@ public:
     friend bool operator==(const PrecompiledHeadersUpdatedMessage &first,
                            const PrecompiledHeadersUpdatedMessage &second)
     {
-        return first.projectPartPchs == second.projectPartPchs;
+        return first.projectPartIds == second.projectPartIds;
     }
 
-    PrecompiledHeadersUpdatedMessage clone() const
-    {
-        return PrecompiledHeadersUpdatedMessage(Utils::clone(projectPartPchs));
-    }
+    PrecompiledHeadersUpdatedMessage clone() const { return *this; }
 
 public:
-    ProjectPartPchs projectPartPchs;
+    ProjectPartIds projectPartIds;
 };
 
 CLANGSUPPORT_EXPORT QDebug operator<<(QDebug debug, const PrecompiledHeadersUpdatedMessage &message);
diff --git a/src/libs/clangsupport/projectpartid.h b/src/libs/clangsupport/projectpartid.h
index c372682baf..fc5f659605 100644
--- a/src/libs/clangsupport/projectpartid.h
+++ b/src/libs/clangsupport/projectpartid.h
@@ -54,7 +54,7 @@ public:
         return first.projectPathId < second.projectPathId;
     }
 
-    friend QDataStream &operator<<(QDataStream &out, const ProjectPartId &projectPathId)
+    friend QDataStream &operator<<(QDataStream &out, ProjectPartId projectPathId)
     {
         out << projectPathId.projectPathId;
 
diff --git a/src/libs/clangsupport/projectpartpch.cpp b/src/libs/clangsupport/projectpartpch.cpp
index aac672441c..9c870ac572 100644
--- a/src/libs/clangsupport/projectpartpch.cpp
+++ b/src/libs/clangsupport/projectpartpch.cpp
@@ -29,8 +29,7 @@ namespace ClangBackEnd {
 
 QDebug operator<<(QDebug debug, const ProjectPartPch &projectPartPch)
 {
-    debug.nospace() << "FileContainer(" << projectPartPch.projectPartId.projectPathId << ", "
-                    << projectPartPch.pchPath << ")";
+    debug.nospace() << "FileContainer(" << projectPartPch.projectPartId.projectPathId << ")";
 
     return debug;
 }
diff --git a/src/libs/clangsupport/projectpartpch.h b/src/libs/clangsupport/projectpartpch.h
index c471b46b16..213247ae42 100644
--- a/src/libs/clangsupport/projectpartpch.h
+++ b/src/libs/clangsupport/projectpartpch.h
@@ -74,8 +74,7 @@ public:
     friend bool operator==(const ProjectPartPch &first,
                            const ProjectPartPch &second)
     {
-        return first.projectPartId == second.projectPartId
-            && first.pchPath == second.pchPath;
+        return first.projectPartId == second.projectPartId && first.pchPath == second.pchPath;
     }
 
     ProjectPartPch clone() const
diff --git a/src/libs/clangsupport/projectpartpchproviderinterface.h b/src/libs/clangsupport/projectpartpchproviderinterface.h
deleted file mode 100644
index 282e541cfd..0000000000
--- a/src/libs/clangsupport/projectpartpchproviderinterface.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2017 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-****************************************************************************/
-
-#pragma once
-
-#include "projectpartpch.h"
-
-#include <utils/optional.h>
-
-namespace ClangBackEnd {
-
-class ProjectPartPchProviderInterface
-{
-public:
-    ProjectPartPchProviderInterface() = default;
-    ProjectPartPchProviderInterface(const ProjectPartPchProviderInterface &) = delete;
-    ProjectPartPchProviderInterface &operator=(const ProjectPartPchProviderInterface &) = delete;
-
-    virtual Utils::optional<ClangBackEnd::ProjectPartPch> projectPartPch(
-        ClangBackEnd::ProjectPartId projectPartId) const = 0;
-    virtual const ClangBackEnd::ProjectPartPchs &projectPartPchs() const = 0;
-
-
-protected:
-    ~ProjectPartPchProviderInterface() = default;
-};
-
-} // namespace ClangBackEnd
diff --git a/src/plugins/clangpchmanager/pchmanagerclient.cpp b/src/plugins/clangpchmanager/pchmanagerclient.cpp
index c26b871f50..04d1d4a0bf 100644
--- a/src/plugins/clangpchmanager/pchmanagerclient.cpp
+++ b/src/plugins/clangpchmanager/pchmanagerclient.cpp
@@ -43,11 +43,8 @@ void PchManagerClient::alive()
 
 void PchManagerClient::precompiledHeadersUpdated(ClangBackEnd::PrecompiledHeadersUpdatedMessage &&message)
 {
-    for (ClangBackEnd::ProjectPartPch &projectPartPch : message.takeProjectPartPchs()) {
-        const QString pchPath{projectPartPch.pchPath};
-        addProjectPartPch(std::move(projectPartPch));
-        precompiledHeaderUpdated(projectPartPch.projectPartId, pchPath, projectPartPch.lastModified);
-    }
+    for (ClangBackEnd::ProjectPartId &projectPartId : message.takeProjectPartIds())
+        precompiledHeaderUpdated(projectPartId);
 }
 
 void PchManagerClient::progress(ClangBackEnd::ProgressMessage &&message)
@@ -66,10 +63,8 @@ void PchManagerClient::progress(ClangBackEnd::ProgressMessage &&message)
 
 void PchManagerClient::precompiledHeaderRemoved(ClangBackEnd::ProjectPartId projectPartId)
 {
-    for (auto notifier : m_notifiers) {
-        removeProjectPartPch(projectPartId);
+    for (auto notifier : m_notifiers)
         notifier->precompiledHeaderRemoved(projectPartId);
-    }
 }
 
 void PchManagerClient::setConnectionClient(PchManagerConnectionClient *connectionClient)
@@ -77,22 +72,6 @@ void PchManagerClient::setConnectionClient(PchManagerConnectionClient *connectio
     m_connectionClient = connectionClient;
 }
 
-Utils::optional<ClangBackEnd::ProjectPartPch> PchManagerClient::projectPartPch(
-    ClangBackEnd::ProjectPartId projectPartId) const
-{
-    auto found = std::lower_bound(m_projectPartPchs.cbegin(),
-                                  m_projectPartPchs.cend(),
-                                  projectPartId,
-                                  [] (const auto &projectPartPch, auto projectPartId) {
-            return projectPartId < projectPartPch.projectPartId;
-    });
-
-    if (found != m_projectPartPchs.end() && found->projectPartId == projectPartId)
-        return *found;
-
-    return Utils::nullopt;
-}
-
 void PchManagerClient::attach(PchManagerNotifierInterface *notifier)
 {
     m_notifiers.push_back(notifier);
@@ -109,47 +88,15 @@ void PchManagerClient::detach(PchManagerNotifierInterface *notifierToBeDeleted)
     m_notifiers.erase(newEnd, m_notifiers.end());
 }
 
-void PchManagerClient::removeProjectPartPch(ClangBackEnd::ProjectPartId projectPartId)
-{
-    auto found = std::lower_bound(m_projectPartPchs.begin(),
-                                  m_projectPartPchs.end(),
-                                  projectPartId,
-                                  [] (const auto &projectPartPch, auto projectPartId) {
-            return projectPartId < projectPartPch.projectPartId;
-    });
-
-    if (found != m_projectPartPchs.end() && found->projectPartId == projectPartId) {
-        *found = std::move(m_projectPartPchs.back());
-        m_projectPartPchs.pop_back();
-    }
-}
-
-void PchManagerClient::addProjectPartPch(ClangBackEnd::ProjectPartPch &&projectPartPch)
-{
-    auto found = std::lower_bound(m_projectPartPchs.begin(),
-                                  m_projectPartPchs.end(),
-                                  projectPartPch.projectPartId,
-                                  [] (const auto &projectPartPch, auto projectPartId) {
-            return projectPartId < projectPartPch.projectPartId;
-    });
-
-    if (found != m_projectPartPchs.end() && found->projectPartId == projectPartPch.projectPartId)
-        *found = std::move(projectPartPch);
-    else
-        m_projectPartPchs.insert(found, std::move(projectPartPch));
-}
-
 const std::vector<PchManagerNotifierInterface *> &PchManagerClient::notifiers() const
 {
     return m_notifiers;
 }
 
-void PchManagerClient::precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId,
-                                                const QString &pchFilePath,
-                                                long long lastModified)
+void PchManagerClient::precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId)
 {
     for (auto notifier : m_notifiers)
-        notifier->precompiledHeaderUpdated(projectPartId, pchFilePath, lastModified);
+        notifier->precompiledHeaderUpdated(projectPartId);
 }
 
 } // namespace ClangPchManager
diff --git a/src/plugins/clangpchmanager/pchmanagerclient.h b/src/plugins/clangpchmanager/pchmanagerclient.h
index 308370356e..7d986a0ab6 100644
--- a/src/plugins/clangpchmanager/pchmanagerclient.h
+++ b/src/plugins/clangpchmanager/pchmanagerclient.h
@@ -28,7 +28,7 @@
 #include "clangpchmanager_global.h"
 
 #include <pchmanagerclientinterface.h>
-#include <projectpartpchproviderinterface.h>
+#include <projectpartid.h>
 
 #include <vector>
 
@@ -37,8 +37,7 @@ class PchManagerConnectionClient;
 class ProgressManagerInterface;
 class PchManagerNotifierInterface;
 
-class CLANGPCHMANAGER_EXPORT PchManagerClient final : public ClangBackEnd::PchManagerClientInterface,
-                                                      public ClangBackEnd::ProjectPartPchProviderInterface
+class CLANGPCHMANAGER_EXPORT PchManagerClient final : public ClangBackEnd::PchManagerClientInterface
 {
     friend class PchManagerNotifierInterface;
 public:
@@ -56,27 +55,13 @@ public:
 
     void setConnectionClient(PchManagerConnectionClient *connectionClient);
 
-    Utils::optional<ClangBackEnd::ProjectPartPch> projectPartPch(
-        ClangBackEnd::ProjectPartId projectPartId) const override;
-
-    const ClangBackEnd::ProjectPartPchs &projectPartPchs() const override
-    {
-        return m_projectPartPchs;
-    }
-
     unittest_public : const std::vector<PchManagerNotifierInterface *> &notifiers() const;
-    void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId,
-                                  const QString &pchFilePath,
-                                  long long lastModified);
+    void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId);
 
     void attach(PchManagerNotifierInterface *notifier);
     void detach(PchManagerNotifierInterface *notifier);
 
-    void addProjectPartPch(ClangBackEnd::ProjectPartPch &&projectPartPch);
-    void removeProjectPartPch(ClangBackEnd::ProjectPartId projectPartId);
-
 private:
-    ClangBackEnd::ProjectPartPchs m_projectPartPchs;
     std::vector<PchManagerNotifierInterface*> m_notifiers;
     PchManagerConnectionClient *m_connectionClient=nullptr;
     ProgressManagerInterface &m_pchCreationProgressManager;
diff --git a/src/plugins/clangpchmanager/pchmanagernotifierinterface.h b/src/plugins/clangpchmanager/pchmanagernotifierinterface.h
index 04461186d6..780ec5a2cd 100644
--- a/src/plugins/clangpchmanager/pchmanagernotifierinterface.h
+++ b/src/plugins/clangpchmanager/pchmanagernotifierinterface.h
@@ -42,10 +42,7 @@ public:
     PchManagerNotifierInterface(const PchManagerNotifierInterface &) = delete;
     PchManagerNotifierInterface &operator=(const PchManagerNotifierInterface &) = delete;
 
-    virtual void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId,
-                                          const QString &pchFilePath,
-                                          long long lastModified)
-        = 0;
+    virtual void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId) = 0;
     virtual void precompiledHeaderRemoved(ClangBackEnd::ProjectPartId projectPartId) = 0;
 
     PchManagerClient &m_pchManagerClient;
diff --git a/src/plugins/clangrefactoring/refactoringprojectupdater.cpp b/src/plugins/clangrefactoring/refactoringprojectupdater.cpp
index 8cfd5b942a..20a9fce730 100644
--- a/src/plugins/clangrefactoring/refactoringprojectupdater.cpp
+++ b/src/plugins/clangrefactoring/refactoringprojectupdater.cpp
@@ -30,9 +30,7 @@
 
 namespace ClangRefactoring {
 
-void RefactoringProjectUpdater::precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId,
-                                                         const QString &,
-                                                         long long)
+void RefactoringProjectUpdater::precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId)
 {
     const QString projectPartName = fetchProjectPartName(projectPartId);
 
diff --git a/src/plugins/clangrefactoring/refactoringprojectupdater.h b/src/plugins/clangrefactoring/refactoringprojectupdater.h
index a9559ef94e..0986e35cb0 100644
--- a/src/plugins/clangrefactoring/refactoringprojectupdater.h
+++ b/src/plugins/clangrefactoring/refactoringprojectupdater.h
@@ -47,9 +47,7 @@ public:
     {
     }
 
-    void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId,
-                                  const QString &pchFilePath,
-                                  long long lastModified) override;
+    void precompiledHeaderUpdated(ClangBackEnd::ProjectPartId projectPartId) override;
     void precompiledHeaderRemoved(ClangBackEnd::ProjectPartId projectPartId) override;
 
 private:
diff --git a/src/tools/clangpchmanagerbackend/source/pchcreator.cpp b/src/tools/clangpchmanagerbackend/source/pchcreator.cpp
index 9dd1bf3647..9416e310aa 100644
--- a/src/tools/clangpchmanagerbackend/source/pchcreator.cpp
+++ b/src/tools/clangpchmanagerbackend/source/pchcreator.cpp
@@ -180,7 +180,7 @@ void PchCreator::doInMainThreadAfterFinished()
         m_buildDependenciesStorage.updatePchCreationTimeStamp(m_projectPartPch.lastModified,
                                                               m_projectPartPch.projectPartId);
         m_clangPathwatcher.updateIdPaths({{m_projectPartPch.projectPartId, existingSources}});
-        m_pchManagerClient.precompiledHeadersUpdated({m_projectPartPch});
+        m_pchManagerClient.precompiledHeadersUpdated({m_projectPartPch.projectPartId});
     }
 }
 
diff --git a/src/tools/clangpchmanagerbackend/source/pchmanagerserver.cpp b/src/tools/clangpchmanagerbackend/source/pchmanagerserver.cpp
index c1c12121aa..9cce6ef469 100644
--- a/src/tools/clangpchmanagerbackend/source/pchmanagerserver.cpp
+++ b/src/tools/clangpchmanagerbackend/source/pchmanagerserver.cpp
@@ -34,6 +34,7 @@
 #include <updategeneratedfilesmessage.h>
 #include <updateprojectpartsmessage.h>
 
+#include <utils/algorithm.h>
 #include <utils/smallstring.h>
 
 #include <QApplication>
@@ -57,18 +58,29 @@ void PchManagerServer::end()
     QCoreApplication::exit();
 }
 
+namespace {
+ProjectPartIds toProjectPartIds(const ProjectPartContainers &projectParts)
+{
+    return Utils::transform<ProjectPartIds>(projectParts, [](const auto &projectPart) {
+        return projectPart.projectPartId;
+    });
+}
+} // namespace
+
 void PchManagerServer::updateProjectParts(UpdateProjectPartsMessage &&message)
 {
     m_toolChainsArgumentsCache.update(message.projectsParts, message.toolChainArguments);
 
-    ProjectPartContainers newProjectParts = m_projectPartsManager.update(message.takeProjectsParts());
+    auto upToDateProjectParts = m_projectPartsManager.update(message.takeProjectsParts());
 
     if (m_generatedFiles.isValid()) {
-        m_pchTaskGenerator.addProjectParts(std::move(newProjectParts),
+        m_pchTaskGenerator.addProjectParts(std::move(upToDateProjectParts.notUpToDate),
                                            std::move(message.toolChainArguments));
     } else  {
-        m_projectPartsManager.updateDeferred(newProjectParts);
+        m_projectPartsManager.updateDeferred(upToDateProjectParts.notUpToDate);
     }
+
+    client()->precompiledHeadersUpdated(toProjectPartIds(upToDateProjectParts.upToDate));
 }
 
 void PchManagerServer::removeProjectParts(RemoveProjectPartsMessage &&message)
diff --git a/src/tools/clangpchmanagerbackend/source/projectpartsmanager.cpp b/src/tools/clangpchmanagerbackend/source/projectpartsmanager.cpp
index cc4ca53d7d..191a13e16b 100644
--- a/src/tools/clangpchmanagerbackend/source/projectpartsmanager.cpp
+++ b/src/tools/clangpchmanagerbackend/source/projectpartsmanager.cpp
@@ -44,34 +44,35 @@ ProjectPartIds toProjectPartIds(const ProjectPartContainers &projectsParts)
     return ids;
 }
 
-ProjectPartContainers ProjectPartsManager::update(ProjectPartContainers &&projectsParts)
+ProjectPartsManager::UpToDataProjectParts ProjectPartsManager::update(ProjectPartContainers &&projectsParts)
 {
-    auto updatedProjectParts = filterNewProjectParts(std::move(projectsParts), m_projectParts);
+    auto notUpToDateProjectParts = filterProjectParts(projectsParts, m_projectParts);
 
-    if (updatedProjectParts.empty())
-        return {};
+    if (notUpToDateProjectParts.empty())
+        return {std::move(projectsParts), {}};
 
     auto persistentProjectParts = m_projectPartsStorage.fetchProjectParts(
-        toProjectPartIds(updatedProjectParts));
+        toProjectPartIds(notUpToDateProjectParts));
 
     if (persistentProjectParts.size() > 0) {
         mergeProjectParts(persistentProjectParts);
 
-        updatedProjectParts = filterNewProjectParts(std::move(updatedProjectParts),
-                                                    persistentProjectParts);
+        notUpToDateProjectParts = filterProjectParts(notUpToDateProjectParts, persistentProjectParts);
 
-        if (updatedProjectParts.empty())
+        if (notUpToDateProjectParts.empty())
             return {};
     }
 
-    m_projectPartsStorage.updateProjectParts(updatedProjectParts);
-    m_projectPartsStorage.resetIndexingTimeStamps(updatedProjectParts);
+    m_projectPartsStorage.updateProjectParts(notUpToDateProjectParts);
+    m_projectPartsStorage.resetIndexingTimeStamps(notUpToDateProjectParts);
     m_precompiledHeaderStorage.deleteProjectPrecompiledHeaders(
-        toProjectPartIds(updatedProjectParts));
+        toProjectPartIds(notUpToDateProjectParts));
 
-    mergeProjectParts(updatedProjectParts);
+    mergeProjectParts(notUpToDateProjectParts);
 
-    return updatedProjectParts;
+    auto upToDateProjectParts = filterProjectParts(projectsParts, notUpToDateProjectParts);
+
+    return {upToDateProjectParts, notUpToDateProjectParts};
 }
 
 void ProjectPartsManager::remove(const ProjectPartIds &projectPartIds)
@@ -176,8 +177,8 @@ ProjectPartContainers ProjectPartsManager::deferredUpdates()
     return deferredProjectParts;
 }
 
-ProjectPartContainers ProjectPartsManager::filterNewProjectParts(
-    ProjectPartContainers &&projectsParts, const ProjectPartContainers &oldProjectParts)
+ProjectPartContainers ProjectPartsManager::filterProjectParts(
+    const ProjectPartContainers &projectsParts, const ProjectPartContainers &oldProjectParts)
 {
     ProjectPartContainers updatedProjectPartContainers;
     updatedProjectPartContainers.reserve(projectsParts.size());
diff --git a/src/tools/clangpchmanagerbackend/source/projectpartsmanager.h b/src/tools/clangpchmanagerbackend/source/projectpartsmanager.h
index 323e6c6825..35d9e41c1c 100644
--- a/src/tools/clangpchmanagerbackend/source/projectpartsmanager.h
+++ b/src/tools/clangpchmanagerbackend/source/projectpartsmanager.h
@@ -36,6 +36,7 @@
 namespace ClangBackEnd {
 
 inline namespace Pch {
+
 class ProjectPartsManager final : public ProjectPartsManagerInterface
 {
 public:
@@ -45,14 +46,14 @@ public:
         , m_precompiledHeaderStorage(precompiledHeaderStorage)
     {}
 
-    ProjectPartContainers update(ProjectPartContainers &&projectsParts) override;
+    UpToDataProjectParts update(ProjectPartContainers &&projectsParts) override;
     void remove(const ProjectPartIds &projectPartIds) override;
     ProjectPartContainers projects(const ProjectPartIds &projectPartIds) const override;
     void updateDeferred(const ProjectPartContainers &projectsParts) override;
     ProjectPartContainers deferredUpdates() override;
 
-    static ProjectPartContainers filterNewProjectParts(ProjectPartContainers &&newProjectsParts,
-                                                       const ProjectPartContainers &oldProjectParts);
+    static ProjectPartContainers filterProjectParts(const ProjectPartContainers &newProjectsParts,
+                                                    const ProjectPartContainers &oldProjectParts);
     void mergeProjectParts(const ProjectPartContainers &projectsParts);
     const ProjectPartContainers &projectParts() const;
 
diff --git a/src/tools/clangpchmanagerbackend/source/projectpartsmanagerinterface.h b/src/tools/clangpchmanagerbackend/source/projectpartsmanagerinterface.h
index ee80173f8a..54bae58c1a 100644
--- a/src/tools/clangpchmanagerbackend/source/projectpartsmanagerinterface.h
+++ b/src/tools/clangpchmanagerbackend/source/projectpartsmanagerinterface.h
@@ -32,11 +32,18 @@ namespace ClangBackEnd {
 class ProjectPartsManagerInterface
 {
 public:
+    class UpToDataProjectParts
+    {
+    public:
+        ProjectPartContainers upToDate;
+        ProjectPartContainers notUpToDate;
+    };
+
     ProjectPartsManagerInterface() = default;
     ProjectPartsManagerInterface(const ProjectPartsManagerInterface &) = delete;
     ProjectPartsManagerInterface &operator=(const ProjectPartsManagerInterface &) = delete;
 
-    virtual ProjectPartContainers update(ProjectPartContainers &&projectsParts) = 0;
+    virtual UpToDataProjectParts update(ProjectPartContainers &&projectsParts) = 0;
     virtual void remove(const ProjectPartIds &projectPartIds) = 0;
     virtual ProjectPartContainers projects(const ProjectPartIds &projectPartIds) const = 0;
     virtual void updateDeferred(const ProjectPartContainers &projectsParts) = 0;
diff --git a/src/tools/clangrefactoringbackend/source/indexdataconsumer.cpp b/src/tools/clangrefactoringbackend/source/indexdataconsumer.cpp
index 86e5fb597c..f44b3134a2 100644
--- a/src/tools/clangrefactoringbackend/source/indexdataconsumer.cpp
+++ b/src/tools/clangrefactoringbackend/source/indexdataconsumer.cpp
@@ -32,6 +32,8 @@
 
 #include <llvm/ADT/ArrayRef.h>
 
+#include <iostream>
+
 namespace ClangBackEnd {
 
 namespace  {
@@ -136,9 +138,10 @@ bool IndexDataConsumer::handleDeclOccurence(
         if (!namedDeclaration->getIdentifier())
             return true;
 
-        if (skipSymbol(m_sourceManager->getFileID(sourceLocation), symbolRoles))
-
+        if (skipSymbol(m_sourceManager->getFileID(sourceLocation), symbolRoles)) {
+            namedDeclaration->getDeclName().dump();
             return true;
+        }
 
         SymbolIndex globalId = toSymbolIndex(declaration->getCanonicalDecl());
 
diff --git a/tests/unit/mockup/projectexplorer/project.h b/tests/unit/mockup/projectexplorer/project.h
index e6e321ee43..c69eb6e47b 100644
--- a/tests/unit/mockup/projectexplorer/project.h
+++ b/tests/unit/mockup/projectexplorer/project.h
@@ -43,6 +43,10 @@ public:
 
     Target *activeTarget() const { return {}; }
 
+    QVariant namedSettings(const QString &name) const { return settings.at(name); }
+    void setNamedSettings(const QString &name, const QVariant &value) { settings[name] = value; }
+
     Utils::FileName rootProjectDirectoryPath;
+    mutable std::map<QString, QVariant> settings;
 };
 } // namespace ProjectExplorer
diff --git a/tests/unit/unittest/gtest-creator-printing.cpp b/tests/unit/unittest/gtest-creator-printing.cpp
index 6b3433ef10..7ac4a676e3 100644
--- a/tests/unit/unittest/gtest-creator-printing.cpp
+++ b/tests/unit/unittest/gtest-creator-printing.cpp
@@ -51,7 +51,7 @@
 #include <precompiledheadersupdatedmessage.h>
 #include <projectpartartefact.h>
 #include <projectpartentry.h>
-#include <projectpartid.h>
+#include <projectpartpch.h>
 #include <sourcedependency.h>
 #include <sourcelocationentry.h>
 #include <sourcelocationscontainer.h>
@@ -719,18 +719,14 @@ std::ostream &operator<<(std::ostream &out, const NativeFilePath &filePath)
 
 std::ostream &operator<<(std::ostream &out, const PrecompiledHeadersUpdatedMessage &message)
 {
-    out << "("
-        << message.projectPartPchs
-        << ")";
+    out << "(" << message.projectPartIds << ")";
 
     return out;
 }
 
 std::ostream &operator<<(std::ostream &out, const ProjectPartPch &projectPartPch)
 {
-    out << "("
-        << projectPartPch.projectPartId << ", "
-        << projectPartPch.pchPath << ", "
+    out << "(" << projectPartPch.projectPartId << ", " << projectPartPch.pchPath << ", "
         << projectPartPch.lastModified << ")";
 
     return out;
diff --git a/tests/unit/unittest/mockpchmanagernotifier.h b/tests/unit/unittest/mockpchmanagernotifier.h
index 600b37bd2e..8db9a63c40 100644
--- a/tests/unit/unittest/mockpchmanagernotifier.h
+++ b/tests/unit/unittest/mockpchmanagernotifier.h
@@ -36,9 +36,6 @@ public:
         : ClangPchManager::PchManagerNotifierInterface(pchManagerClient)
     {}
 
-    MOCK_METHOD3(precompiledHeaderUpdated,
-                 void(ClangBackEnd::ProjectPartId projectPartId,
-                      const QString &pchFilePath,
-                      long long lastModified));
+    MOCK_METHOD1(precompiledHeaderUpdated, void(ClangBackEnd::ProjectPartId projectPartId));
     MOCK_METHOD1(precompiledHeaderRemoved, void(ClangBackEnd::ProjectPartId projectPartId));
 };
diff --git a/tests/unit/unittest/mockprojectpartsmanager.h b/tests/unit/unittest/mockprojectpartsmanager.h
index b2cab59060..613faf7dfc 100644
--- a/tests/unit/unittest/mockprojectpartsmanager.h
+++ b/tests/unit/unittest/mockprojectpartsmanager.h
@@ -33,7 +33,7 @@ class MockProjectPartsManager : public ClangBackEnd::ProjectPartsManagerInterfac
 {
 public:
     MOCK_METHOD1(update,
-                 ClangBackEnd::ProjectPartContainers(
+                 ClangBackEnd::ProjectPartsManagerInterface::UpToDataProjectParts(
                      const ClangBackEnd::ProjectPartContainers &projectsParts));
     MOCK_METHOD1(remove, void(const ClangBackEnd::ProjectPartIds &projectPartIds));
     MOCK_CONST_METHOD1(
@@ -42,7 +42,8 @@ public:
     MOCK_METHOD1(updateDeferred, void(const ClangBackEnd::ProjectPartContainers &projectsParts));
     MOCK_METHOD0(deferredUpdates, ClangBackEnd::ProjectPartContainers());
 
-    ClangBackEnd::ProjectPartContainers update(ClangBackEnd::ProjectPartContainers &&projectsParts) override
+    ClangBackEnd::ProjectPartsManagerInterface::UpToDataProjectParts update(
+        ClangBackEnd::ProjectPartContainers &&projectsParts) override
     {
         return update(projectsParts);
     }
diff --git a/tests/unit/unittest/pchcreator-test.cpp b/tests/unit/unittest/pchcreator-test.cpp
index 19bc087ca6..66943fc147 100644
--- a/tests/unit/unittest/pchcreator-test.cpp
+++ b/tests/unit/unittest/pchcreator-test.cpp
@@ -203,8 +203,8 @@ TEST_F(PchCreatorVerySlowTest, ProjectPartPchsSendToPchManagerClient)
 
     EXPECT_CALL(mockPchManagerClient,
                 precompiledHeadersUpdated(
-                    Field(&ClangBackEnd::PrecompiledHeadersUpdatedMessage::projectPartPchs,
-                          ElementsAre(Eq(creator.projectPartPch())))));
+                    Field(&ClangBackEnd::PrecompiledHeadersUpdatedMessage::projectPartIds,
+                          ElementsAre(Eq(creator.projectPartPch().projectPartId)))));
 
     creator.doInMainThreadAfterFinished();
 }
diff --git a/tests/unit/unittest/pchmanagerclient-test.cpp b/tests/unit/unittest/pchmanagerclient-test.cpp
index 6c74143e4d..18a61d7038 100644
--- a/tests/unit/unittest/pchmanagerclient-test.cpp
+++ b/tests/unit/unittest/pchmanagerclient-test.cpp
@@ -65,11 +65,9 @@ protected:
                                                              filePathCache,
                                                              mockProjectPartsStorage};
     ClangBackEnd::ProjectPartId projectPartId{1};
-    ClangBackEnd::FilePath pchFilePath{"/path/to/pch"};
-    PrecompiledHeadersUpdatedMessage message{{{projectPartId, pchFilePath.clone(), 1}}};
+    PrecompiledHeadersUpdatedMessage message{{projectPartId}};
     ClangBackEnd::ProjectPartId projectPartId2{2};
-    ClangBackEnd::FilePath pchFilePath2{"/path/to/pch2"};
-    PrecompiledHeadersUpdatedMessage message2{{{projectPartId2, pchFilePath2.clone(), 1}}};
+    PrecompiledHeadersUpdatedMessage message2{{projectPartId2}};
 };
 
 TEST_F(PchManagerClient, NotifierAttached)
@@ -93,8 +91,7 @@ TEST_F(PchManagerClient, NotifierDetached)
 
 TEST_F(PchManagerClient, Update)
 {
-    EXPECT_CALL(mockPchManagerNotifier,
-                precompiledHeaderUpdated(projectPartId, pchFilePath.toQString(), Eq(1)));
+    EXPECT_CALL(mockPchManagerNotifier, precompiledHeaderUpdated(projectPartId));
 
     client.precompiledHeadersUpdated(message.clone());
 }
@@ -106,58 +103,6 @@ TEST_F(PchManagerClient, Remove)
     projectUpdater.removeProjectParts({projectPartId, projectPartId});
 }
 
-TEST_F(PchManagerClient, GetNoProjectPartPchForWrongProjectPartId)
-{
-    auto optional = client.projectPartPch(23);
-
-    ASSERT_FALSE(optional);
-}
-
-TEST_F(PchManagerClient, GetProjectPartPchForProjectPartId)
-{
-    client.precompiledHeadersUpdated(std::move(message));
-
-    auto optional = client.projectPartPch(projectPartId);
-
-    ASSERT_TRUE(optional);
-}
-
-TEST_F(PchManagerClient, ProjectPartPchRemoved)
-{
-    client.precompiledHeadersUpdated(std::move(message));
-
-    client.precompiledHeaderRemoved(projectPartId);
-
-    ASSERT_FALSE(client.projectPartPch(projectPartId));
-}
-
-TEST_F(PchManagerClient, ProjectPartPchHasNoDublicateEntries)
-{
-    client.precompiledHeadersUpdated(message.clone());
-    client.precompiledHeadersUpdated(message2.clone());
-
-    client.precompiledHeadersUpdated(message.clone());
-
-    ASSERT_THAT(client.projectPartPchs(), SizeIs(2));
-}
-
-TEST_F(PchManagerClient, ProjectPartPchForProjectPartIdLastModified)
-{
-    client.precompiledHeadersUpdated(std::move(message));
-
-    ASSERT_THAT(client.projectPartPch(projectPartId)->lastModified, 1);
-}
-
-TEST_F(PchManagerClient, ProjectPartPchForProjectPartIdIsUpdated)
-{
-    client.precompiledHeadersUpdated(message.clone());
-    PrecompiledHeadersUpdatedMessage updateMessage{{{projectPartId, pchFilePath.clone(), 42}}};
-
-    client.precompiledHeadersUpdated(updateMessage.clone());
-
-    ASSERT_THAT(client.projectPartPch(projectPartId)->lastModified, 42);
-}
-
 TEST_F(PchManagerClient, SetPchCreationProgress)
 {
     EXPECT_CALL(mockPchCreationProgressManager, setProgress(10, 20));
diff --git a/tests/unit/unittest/pchmanagerclientserverinprocess-test.cpp b/tests/unit/unittest/pchmanagerclientserverinprocess-test.cpp
index e55b71f860..194f52afd3 100644
--- a/tests/unit/unittest/pchmanagerclientserverinprocess-test.cpp
+++ b/tests/unit/unittest/pchmanagerclientserverinprocess-test.cpp
@@ -148,7 +148,7 @@ TEST_F(PchManagerClientServerInProcess, SendRemoveGeneratedFilesMessage)
 
 TEST_F(PchManagerClientServerInProcess, SendPrecompiledHeaderUpdatedMessage)
 {
-    PrecompiledHeadersUpdatedMessage message{{{1, "/path/to/pch", 1}}};
+    PrecompiledHeadersUpdatedMessage message{1};
 
     EXPECT_CALL(mockPchManagerClient, precompiledHeadersUpdated(message));
 
diff --git a/tests/unit/unittest/pchmanagerserver-test.cpp b/tests/unit/unittest/pchmanagerserver-test.cpp
index 502b51bc8c..47b7d987ab 100644
--- a/tests/unit/unittest/pchmanagerserver-test.cpp
+++ b/tests/unit/unittest/pchmanagerserver-test.cpp
@@ -48,6 +48,7 @@ using ClangBackEnd::V2::FileContainer;
 using ClangBackEnd::V2::FileContainers;
 using ClangBackEnd::ProjectPartContainer;
 using ClangBackEnd::ProjectPartContainers;
+using UpToDataProjectParts = ClangBackEnd::ProjectPartsManagerInterface::UpToDataProjectParts;
 
 class PchManagerServer : public ::testing::Test
 {
@@ -55,7 +56,8 @@ class PchManagerServer : public ::testing::Test
     {
         server.setClient(&mockPchManagerClient);
 
-        ON_CALL(mockProjectPartsManager, update(projectParts)).WillByDefault(Return(projectParts));
+        ON_CALL(mockProjectPartsManager, update(projectParts))
+            .WillByDefault(Return(UpToDataProjectParts{{}, projectParts}));
         ON_CALL(mockGeneratedFiles, isValid()).WillByDefault(Return(true));
    }
 
@@ -107,7 +109,8 @@ protected:
         Utils::LanguageVersion::C11,
         Utils::LanguageExtension::All};
     std::vector<ProjectPartContainer> projectParts{projectPart1, projectPart2};
-        std::vector<ProjectPartContainer> projectParts2{projectPart2};
+    std::vector<ProjectPartContainer> projectParts1{projectPart1};
+    std::vector<ProjectPartContainer> projectParts2{projectPart2};
     FileContainer generatedFile{{"/path/to/", "file"}, "content", {}};
     ClangBackEnd::UpdateProjectPartsMessage updateProjectPartsMessage{
         Utils::clone(projectParts), {"toolChainArgument"}};
@@ -120,7 +123,7 @@ TEST_F(PchManagerServer, FilterProjectPartsAndSendThemToQueue)
     InSequence s;
 
     EXPECT_CALL(mockProjectPartsManager, update(updateProjectPartsMessage.projectsParts))
-        .WillOnce(Return(projectParts2));
+        .WillOnce(Return(UpToDataProjectParts{{}, projectParts2}));
     EXPECT_CALL(
         mockPchTaskGenerator, addProjectParts(Eq(projectParts2), ElementsAre("toolChainArgument")));
 
@@ -219,7 +222,7 @@ TEST_F(PchManagerServer, DontGeneratePchIfGeneratedFilesAreNotValid)
     InSequence s;
 
     EXPECT_CALL(mockProjectPartsManager, update(ElementsAre(projectPart1)))
-        .WillOnce(Return(ProjectPartContainers{projectPart1}));
+        .WillOnce(Return(UpToDataProjectParts{{}, ProjectPartContainers{projectPart1}}));
     EXPECT_CALL(mockGeneratedFiles, isValid()).WillOnce(Return(false));
     EXPECT_CALL(mockPchTaskGenerator, addProjectParts(_, _)).Times(0);
     EXPECT_CALL(mockProjectPartsManager, updateDeferred(ElementsAre(projectPart1)));
@@ -233,7 +236,7 @@ TEST_F(PchManagerServer, GeneratePchIfGeneratedFilesAreValid)
     InSequence s;
 
     EXPECT_CALL(mockProjectPartsManager, update(ElementsAre(projectPart1)))
-        .WillOnce(Return(ProjectPartContainers{projectPart1}));
+        .WillOnce(Return(UpToDataProjectParts{{}, ProjectPartContainers{projectPart1}}));
     EXPECT_CALL(mockGeneratedFiles, isValid()).WillOnce(Return(true));
     EXPECT_CALL(mockPchTaskGenerator, addProjectParts(_, _));
     EXPECT_CALL(mockProjectPartsManager, updateDeferred(_)).Times(0);
@@ -276,4 +279,19 @@ TEST_F(PchManagerServer, AfterUpdatingGeneratedFilesAreStillInvalidSoNoPchsGener
     server.updateGeneratedFiles(updateGeneratedFilesMessage.clone());
 }
 
+TEST_F(PchManagerServer, SentUpToDateProjectPartIdsToClient)
+{
+    InSequence s;
+
+    EXPECT_CALL(mockProjectPartsManager, update(updateProjectPartsMessage.projectsParts))
+        .WillOnce(Return(UpToDataProjectParts{projectParts1, projectParts2}));
+    EXPECT_CALL(mockPchTaskGenerator,
+                addProjectParts(Eq(projectParts2), ElementsAre("toolChainArgument")));
+    EXPECT_CALL(mockPchManagerClient,
+                precompiledHeadersUpdated(
+                    Field(&ClangBackEnd::PrecompiledHeadersUpdatedMessage::projectPartIds,
+                          ElementsAre(Eq(projectPart1.projectPartId)))));
+
+    server.updateProjectParts(updateProjectPartsMessage.clone());
 }
+} // namespace
diff --git a/tests/unit/unittest/projectpartsmanager-test.cpp b/tests/unit/unittest/projectpartsmanager-test.cpp
index b12cbb6b2e..d86543e9c2 100644
--- a/tests/unit/unittest/projectpartsmanager-test.cpp
+++ b/tests/unit/unittest/projectpartsmanager-test.cpp
@@ -36,6 +36,7 @@ namespace {
 using ClangBackEnd::FilePathId;
 using ClangBackEnd::ProjectPartContainer;
 using ClangBackEnd::ProjectPartContainers;
+using UpToDataProjectParts = ClangBackEnd::ProjectPartsManagerInterface::UpToDataProjectParts;
 
 class ProjectPartsManager : public testing::Test
 {
@@ -111,16 +112,20 @@ protected:
 
 TEST_F(ProjectPartsManager, GetNoProjectPartsForAddingEmptyProjectParts)
 {
-    auto updatedProjectParts = manager.update({});
+    auto projectParts = manager.update({});
 
-    ASSERT_THAT(updatedProjectParts, IsEmpty());
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, IsEmpty()),
+                      Field(&UpToDataProjectParts::notUpToDate, IsEmpty())));
 }
 
 TEST_F(ProjectPartsManager, GetProjectPartForAddingProjectPart)
 {
-    auto updatedProjectParts = manager.update({projectPartContainer1});
+    auto projectParts = manager.update({projectPartContainer1});
 
-    ASSERT_THAT(updatedProjectParts, ElementsAre(projectPartContainer1));
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, IsEmpty()),
+                      Field(&UpToDataProjectParts::notUpToDate, ElementsAre(projectPartContainer1))));
 }
 
 TEST_F(ProjectPartsManager, GetProjectPartForAddingProjectPartWithProjectPartAlreadyInTheDatabase)
@@ -128,9 +133,11 @@ TEST_F(ProjectPartsManager, GetProjectPartForAddingProjectPartWithProjectPartAlr
     ON_CALL(mockProjectPartsStorage, fetchProjectParts(_))
         .WillByDefault(Return(ProjectPartContainers{projectPartContainer1}));
 
-    auto updatedProjectParts = manager.update({projectPartContainer1, projectPartContainer2});
+    auto projectParts = manager.update({projectPartContainer1, projectPartContainer2});
 
-    ASSERT_THAT(updatedProjectParts, ElementsAre(projectPartContainer2));
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, ElementsAre(projectPartContainer1)),
+                      Field(&UpToDataProjectParts::notUpToDate, ElementsAre(projectPartContainer2))));
 }
 
 TEST_F(ProjectPartsManager, GetProjectPartForAddingProjectPartWithOlderProjectPartAlreadyInTheDatabase)
@@ -138,9 +145,12 @@ TEST_F(ProjectPartsManager, GetProjectPartForAddingProjectPartWithOlderProjectPa
     ON_CALL(mockProjectPartsStorage, fetchProjectParts(_))
         .WillByDefault(Return(ProjectPartContainers{projectPartContainer1}));
 
-    auto updatedProjectParts = manager.update({updatedProjectPartContainer1, projectPartContainer2});
+    auto projectParts = manager.update({updatedProjectPartContainer1, projectPartContainer2});
 
-    ASSERT_THAT(updatedProjectParts, ElementsAre(updatedProjectPartContainer1, projectPartContainer2));
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, IsEmpty()),
+                      Field(&UpToDataProjectParts::notUpToDate,
+                            ElementsAre(updatedProjectPartContainer1, projectPartContainer2))));
 }
 
 TEST_F(ProjectPartsManager, ProjectPartAdded)
@@ -184,9 +194,11 @@ TEST_F(ProjectPartsManager, DoNotUpdateNotNewProjectPart)
 {
     manager.update({projectPartContainer1});
 
-    auto updatedProjectParts = manager.update({projectPartContainer1});
+    auto projectParts = manager.update({projectPartContainer1});
 
-    ASSERT_THAT(updatedProjectParts, IsEmpty());
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, ElementsAre(projectPartContainer1)),
+                      Field(&UpToDataProjectParts::notUpToDate, IsEmpty())));
 }
 
 TEST_F(ProjectPartsManager, NoDuplicateProjectPartAfterUpdatingWithNotNewProjectPart)
@@ -216,8 +228,8 @@ TEST_F(ProjectPartsManager, MergeProjectMultipleTimesParts)
 
 TEST_F(ProjectPartsManager, GetNewProjectParts)
 {
-    auto newProjectParts = manager.filterNewProjectParts({projectPartContainer1, projectPartContainer2},
-                                                         {projectPartContainer2});
+    auto newProjectParts = manager.filterProjectParts({projectPartContainer1, projectPartContainer2},
+                                                      {projectPartContainer2});
 
     ASSERT_THAT(newProjectParts, ElementsAre(projectPartContainer1));
 }
@@ -226,9 +238,12 @@ TEST_F(ProjectPartsManager, GetUpdatedProjectPart)
 {
     manager.update({projectPartContainer1, projectPartContainer2});
 
-    auto updatedProjectParts = manager.update({updatedProjectPartContainer1});
+    auto projectParts = manager.update({updatedProjectPartContainer1});
 
-    ASSERT_THAT(updatedProjectParts, ElementsAre(updatedProjectPartContainer1));
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, IsEmpty()),
+                      Field(&UpToDataProjectParts::notUpToDate,
+                            ElementsAre(updatedProjectPartContainer1))));
 }
 
 TEST_F(ProjectPartsManager, ProjectPartIsReplacedWithUpdatedProjectPart)
@@ -280,14 +295,14 @@ TEST_F(ProjectPartsManager, UpdateDeferred)
 
 TEST_F(ProjectPartsManager, NotUpdateDeferred)
 {
-    auto projectPartContainers = manager.update({projectPartContainer1, projectPartContainer2});
+    manager.update({projectPartContainer1, projectPartContainer2});
 
     ASSERT_THAT(manager.deferredUpdates(), IsEmpty());
 }
 
 TEST_F(ProjectPartsManager, UpdateDeferredCleansDeferredUpdates)
 {
-    auto projectPartContainers = manager.update({projectPartContainer1, projectPartContainer2});
+    manager.update({projectPartContainer1, projectPartContainer2});
     manager.updateDeferred({projectPartContainer1});
 
     manager.deferredUpdates();
@@ -386,9 +401,11 @@ TEST_F(ProjectPartsManager,
     ON_CALL(mockProjectPartsStorage, fetchProjectParts(_))
         .WillByDefault(Return(ProjectPartContainers{projectPartContainerWithoutPrecompiledHeader1}));
 
-    auto updatedProjectParts = manager.update({projectPartContainer1});
+    auto projectParts = manager.update({projectPartContainer1});
 
-    ASSERT_THAT(updatedProjectParts, ElementsAre(projectPartContainer1));
+    ASSERT_THAT(projectParts,
+                AllOf(Field(&UpToDataProjectParts::upToDate, IsEmpty()),
+                      Field(&UpToDataProjectParts::notUpToDate, ElementsAre(projectPartContainer1))));
 }
 
 TEST_F(ProjectPartsManager, ProjectPartAddedWithProjectPartAlreadyInTheDatabaseButWithoutEntries)
diff --git a/tests/unit/unittest/refactoringprojectupdater-test.cpp b/tests/unit/unittest/refactoringprojectupdater-test.cpp
index 8d5e60df91..6913d1a16f 100644
--- a/tests/unit/unittest/refactoringprojectupdater-test.cpp
+++ b/tests/unit/unittest/refactoringprojectupdater-test.cpp
@@ -101,7 +101,7 @@ TEST_F(RefactoringProjectUpdater, DontUpdateProjectPartIfNoProjectPartExistsForI
     EXPECT_CALL(mockCppModelManager, projectPartForId(Eq(QString("project1"))));
     EXPECT_CALL(mockRefactoringServer, updateProjectParts(_)).Times(0);
 
-    pchManagerClient.precompiledHeadersUpdated({{{3, "/path/to/pch", 12}}});
+    pchManagerClient.precompiledHeadersUpdated({3});
 }
 
 TEST_F(RefactoringProjectUpdater, UpdateProjectPart)
@@ -118,7 +118,7 @@ TEST_F(RefactoringProjectUpdater, UpdateProjectPart)
                 updateProjectParts(Field(&UpdateProjectPartsMessage::projectsParts,
                                          ElementsAre(IsProjectPartContainer(3)))));
 
-    pchManagerClient.precompiledHeadersUpdated({{{3, "/path/to/pch", 12}}});
+    pchManagerClient.precompiledHeadersUpdated({3});
 }
 
 TEST_F(RefactoringProjectUpdater, RemoveProjectPart)