Repair tst_QBluetoothDeviceDiscoveryAgent unit test on Android

tst_QBluetoothDeviceDiscoveryAgent::tst_startStopDeviceDiscoveries
was broken on Android. The sequence
QBluetoothDeviceDiscoveryAgent::start()
QBluetoothDeviceDiscoveryAgent::stop()
QBluetoothDeviceDiscoveryAgent::start()
QBluetoothDeviceDiscoveryAgent::stop()
is called rather quickly.
The first stop() results in the state
pendingCancel=true, pendingStart=false.
The second start() results in the state
pendingCancel=true, pendingStart=true.
The second stop() then did nothing because pendingCancel=true.
Then, after the whole sequence, discovery started because
pendingStart=true.
This patch repairs it by setting pendingStart=false
in the stop() method.

Change-Id: I55486b5b494265c90149e72461a1d0529adaa2f0
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
(cherry picked from commit 32b859dc9c83c7fb440e53335917021ef7eab15d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/bluetooth/qbluetoothdevicediscoveryagent_android.cpp b/src/bluetooth/qbluetoothdevicediscoveryagent_android.cpp
index 21187e5e..03ef0d21 100644
--- a/src/bluetooth/qbluetoothdevicediscoveryagent_android.cpp
+++ b/src/bluetooth/qbluetoothdevicediscoveryagent_android.cpp
@@ -285,15 +285,20 @@ void QBluetoothDeviceDiscoveryAgentPrivate::stop()
 {
     Q_Q(QBluetoothDeviceDiscoveryAgent);
 
+    pendingStart = false;
+
     if (m_active == NoScanActive)
         return;
 
     if (m_active == SDPScanActive) {
-        if (pendingCancel)
+        if (pendingCancel) {
+            // If we had both a pending cancel and a pending start,
+            // we now have only a pending cancel.
+            // The pending start was canceled above.
             return;
+        }
 
         pendingCancel = true;
-        pendingStart = false;
         bool success = adapter.callMethod<jboolean>("cancelDiscovery");
         if (!success) {
             lastError = QBluetoothDeviceDiscoveryAgent::InputOutputError;