Refactor the speed configuration for *nix

The internal implementation of this is a little tangled. It is
reasonable to simplify it:

1. Remove the setBaudRate_helper() method, as it is equivalent to
   setStandardBaudRate() method.

2. Now the setStandardBaudRate() and the setCustomBaudRate() are
   self-sufficient methods (can setup a speed and an error codes
   internally) and return a boolean values.

Also added the "loopback" test for check of different speeds.

Tested with the on-board and the USB serial ports.

Change-Id: I4320c2e29ad42a394e07753cbaea804d0faf6b78
Reviewed-by: Sergey Belyashov <Sergey.Belyashov@gmail.com>
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/auto/qserialport/tst_qserialport.cpp b/tests/auto/qserialport/tst_qserialport.cpp
index 947047a..22f3b65 100644
--- a/tests/auto/qserialport/tst_qserialport.cpp
+++ b/tests/auto/qserialport/tst_qserialport.cpp
@@ -112,6 +112,9 @@ private slots:
 
     void clearAfterOpen();
 
+    void loopBack_data();
+    void loopBack();
+
 protected slots:
     void handleBytesWrittenAndExitLoopSlot(qint64 bytesWritten);
     void handleBytesWrittenAndExitLoopSlot2(qint64 bytesWritten);
@@ -916,5 +919,35 @@ void tst_QSerialPort::clearAfterOpen()
     QCOMPARE(senderPort.error(), QSerialPort::NoError);
 }
 
+void tst_QSerialPort::loopBack_data()
+{
+    QTest::addColumn<int>("baudRate");
+
+    QTest::newRow("9600 N 1 None") << 9600;
+    QTest::newRow("115200 N 1 None") << 115200;
+    QTest::newRow("14400 N 1 None") << 14400;
+}
+
+// This test works with the connected Rx and Tx pins.
+void tst_QSerialPort::loopBack()
+{
+    QFETCH(int, baudRate);
+
+    QSerialPort serialPort(m_senderPortName);
+    QVERIFY(serialPort.open(QSerialPort::ReadWrite));
+
+    QVERIFY(serialPort.setBaudRate(baudRate));
+    QCOMPARE(serialPort.baudRate(), baudRate);
+
+    QCOMPARE(serialPort.write(alphabetArray), qint64(alphabetArray.size()));
+    QVERIFY(serialPort.waitForBytesWritten(500));
+
+    do {
+        QVERIFY(serialPort.waitForReadyRead(500));
+    } while (serialPort.bytesAvailable() < alphabetArray.size());
+
+    QCOMPARE(serialPort.readAll(), alphabetArray);
+}
+
 QTEST_MAIN(tst_QSerialPort)
 #include "tst_qserialport.moc"