Allow auto tests to stay away from the user's configuration.

QStandardPaths now knows a "test mode" which changes writable locations
to point to test directories, in order to prevent auto tests from reading from
or writing to the current user's configuration.

This affects the locations into which test programs might write files:
GenericDataLocation, DataLocation, ConfigLocation,
GenericCacheLocation, CacheLocation.
Other locations are not affected.

Change-Id: I29606c2e74714360edd871a8c387a5c1ef7d1f54
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/src/corelib/io/qstandardpaths_unix.cpp b/src/corelib/io/qstandardpaths_unix.cpp
index 1a2ae96edb..3ccac09990 100644
--- a/src/corelib/io/qstandardpaths_unix.cpp
+++ b/src/corelib/io/qstandardpaths_unix.cpp
@@ -63,6 +63,13 @@ static void appendOrganizationAndApp(QString &path)
         path += QLatin1Char('/') + appName;
 }
 
+static bool qsp_testMode = false;
+
+void QStandardPaths::enableTestMode(bool testMode)
+{
+    qsp_testMode = testMode;
+}
+
 QString QStandardPaths::writableLocation(StandardLocation type)
 {
     switch (type) {
@@ -75,6 +82,8 @@ QString QStandardPaths::writableLocation(StandardLocation type)
     {
         // http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
         QString xdgCacheHome = QFile::decodeName(qgetenv("XDG_CACHE_HOME"));
+        if (qsp_testMode)
+            xdgCacheHome = QDir::homePath() + QLatin1String("/.qttest/cache");
         if (xdgCacheHome.isEmpty())
             xdgCacheHome = QDir::homePath() + QLatin1String("/.cache");
         if (type == QStandardPaths::CacheLocation)
@@ -85,6 +94,8 @@ QString QStandardPaths::writableLocation(StandardLocation type)
     case GenericDataLocation:
     {
         QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
+        if (qsp_testMode)
+            xdgDataHome = QDir::homePath() + QLatin1String("/.qttest/share");
         if (xdgDataHome.isEmpty())
             xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
         if (type == QStandardPaths::DataLocation)
@@ -95,6 +106,8 @@ QString QStandardPaths::writableLocation(StandardLocation type)
     {
         // http://standards.freedesktop.org/basedir-spec/latest/
         QString xdgConfigHome = QFile::decodeName(qgetenv("XDG_CONFIG_HOME"));
+        if (qsp_testMode)
+            xdgConfigHome = QDir::homePath() + QLatin1String("/.qttest/config");
         if (xdgConfigHome.isEmpty())
             xdgConfigHome = QDir::homePath() + QLatin1String("/.config");
         return xdgConfigHome;
@@ -140,7 +153,7 @@ QString QStandardPaths::writableLocation(StandardLocation type)
     if (xdgConfigHome.isEmpty())
         xdgConfigHome = QDir::homePath() + QLatin1String("/.config");
     QFile file(xdgConfigHome + QLatin1String("/user-dirs.dirs"));
-    if (file.open(QIODevice::ReadOnly)) {
+    if (!qsp_testMode && file.open(QIODevice::ReadOnly)) {
         QHash<QString, QString> lines;
         QTextStream stream(&file);
         // Only look for lines like: XDG_DESKTOP_DIR="$HOME/Desktop"