VcsBase: Fix ClearCase plugin unit test

Change-Id: Icd1ff6a3e58a654babae4ebf3a4e33a26c4a58f4
(cherry picked from commit b3b3b41a7f)
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/vcsbase/vcsbase.pro

@@ -64,3 +64,5 @@ FORMS += commonsettingspage.ui \
     nicknamedialog.ui \
     cleandialog.ui \
     submiteditorwidget.ui
+
+equals(TEST, 1): DEFINES += "SRC_DIR=\\\"$$IDE_SOURCE_TREE\\\""

src/plugins/vcsbase/vcsbase.qbs

@@ -83,4 +83,6 @@ QtcPlugin {
         "wizard/vcsjsextension.cpp",
         "wizard/vcsjsextension.h",
     ]
+
+    cpp.defines: base.concat( testsEnabled ? ['SRC_DIR="' + project.ide_source_tree + '"'] : [] )
 }

src/plugins/vcsbase/vcsbaseeditor.cpp

@@ -1635,6 +1635,8 @@ void VcsBase::VcsBaseEditorWidget::testDiffFileResolving(const char *id)
     QFETCH(QByteArray, fileName);
     QTextDocument doc(QString::fromLatin1(header));
     QTextBlock block = doc.lastBlock();
+    // set source root for shadow builds
+    widget->setSource(QString::fromLatin1(SRC_DIR));
     QVERIFY(widget->fileNameFromDiffSpecification(block).endsWith(QString::fromLatin1(fileName)));
 
     delete editor;