AutoTest: Fix processing of output

In case a (Qt) test process produces output that does not belong
to the standard test output we might ended without processable
output at all.
Avoid this by just handling the output that is given on stdout
for now.

Change-Id: If5ee70140b95cb61422e58a7610b7fe2d09915c2
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/plugins/autotest/testoutputreader.cpp

@@ -137,6 +137,13 @@ TestOutputReader::TestOutputReader(const QFutureInterface<TestResultPtr> &future
     , m_buildDir(buildDirectory)
 {
     connect(m_testApplication, &QProcess::readyRead, this, &TestOutputReader::processOutput);
+    connect(m_testApplication, &QProcess::readyReadStandardError,
+            this, &TestOutputReader::processStdError);
+}
+
+void TestOutputReader::processStdError()
+{
+    qWarning() << "Ignored plain output:" << m_testApplication->readAllStandardError();
 }
 
 QtTestOutputReader::QtTestOutputReader(const QFutureInterface<TestResultPtr> &futureInterface,

src/plugins/autotest/testoutputreader.h

@@ -49,6 +49,7 @@ public:
 
 protected:
     virtual void processOutput() = 0;
+    virtual void processStdError();
     QFutureInterface<TestResultPtr> m_futureInterface;
     QProcess *m_testApplication;  // not owned
     QString m_buildDir;

src/plugins/autotest/testrunner.cpp

@@ -137,7 +137,6 @@ static void performTestRun(QFutureInterface<TestResultPtr> &futureInterface,
     }
 
     QProcess testProcess;
-    testProcess.setReadChannelMode(QProcess::MergedChannels);
     testProcess.setReadChannel(QProcess::StandardOutput);
 
     futureInterface.setProgressRange(0, testCaseCount);