QUrl: make sure setAuthority is consistent with setHost

... which is important for an empty but non-null authority.

In Qt5 this is already working.

Change-Id: I7d389037f71320c6f06897b220633311c3611eea
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 28 insertions, 1 deletions

diff --git a/src/corelib/io/qurl.cpp b/src/corelib/io/qurl.cpp
index 9bb411d..8aaf0e0 100644
--- a/src/corelib/io/qurl.cpp
+++ b/src/corelib/io/qurl.cpp
@@ -3574,7 +3574,10 @@ void QUrlPrivate::setAuthority(const QString &auth)
     isHostValid = true;
     if (auth.isEmpty()) {
         setUserInfo(QString());
-        host.clear();
+        if (auth.isNull())
+            host.clear();
+        else
+            host = QLatin1String("");
         port = -1;
         return;
     }
diff --git a/tests/auto/qurl/tst_qurl.cpp b/tests/auto/qurl/tst_qurl.cpp
index 81f646d..bccd532 100644
--- a/tests/auto/qurl/tst_qurl.cpp
+++ b/tests/auto/qurl/tst_qurl.cpp
@@ -189,6 +189,8 @@ private slots:
     void toEncoded();
     void setAuthority_data();
     void setAuthority();
+    void setEmptyAuthority_data();
+    void setEmptyAuthority();
     void errorString();
     void clear();
     void resolvedWithAbsoluteSchemes() const;
@@ -3776,6 +3778,28 @@ void tst_QUrl::setAuthority()
     QCOMPARE(u.toString(), url);
 }
 
+void tst_QUrl::setEmptyAuthority_data()
+{
+    QTest::addColumn<QString>("host");
+    QTest::addColumn<QString>("authority");
+    QTest::addColumn<QString>("expectedUrlString");
+
+    QTest::newRow("null host and authority") << QString() << QString() << QString("");
+    QTest::newRow("empty host and authority") << QString("") << QString("") << QString("//");
+}
+
+void tst_QUrl::setEmptyAuthority()
+{
+    QFETCH(QString, host);
+    QFETCH(QString, authority);
+    QFETCH(QString, expectedUrlString);
+    QUrl u;
+    u.setHost(host);
+    QCOMPARE(u.toString(), expectedUrlString);
+    u.setAuthority(authority);
+    QCOMPARE(u.toString(), expectedUrlString);
+}
+
 void tst_QUrl::errorString()
 {
     QUrl u = QUrl::fromEncoded("http://strange<username>@bad_hostname/", QUrl::StrictMode);