Write test for doughnut chart export of data labels to OOXML.

We must not export label position properties for doughnut charts, else
MS Office would think the file is corrupt.

Change-Id: Icfab257ffb6da945b8add661e6455aa66cc475ab

chart2/qa/extras/chart2export.cxx

@@ -71,6 +71,7 @@ public:
     void testAxisNumberFormatODS();
     void testDataLabelBordersDOCX();
     void testDataLabel3DChartDOCX();
+    void testDataLabelDoughnutChartDOCX();
 
     CPPUNIT_TEST_SUITE(Chart2ExportTest);
     CPPUNIT_TEST(test);
@@ -107,6 +108,7 @@ public:
     CPPUNIT_TEST(testAxisNumberFormatODS);
     CPPUNIT_TEST(testDataLabelBordersDOCX);
     CPPUNIT_TEST(testDataLabel3DChartDOCX);
+    CPPUNIT_TEST(testDataLabelDoughnutChartDOCX);
     CPPUNIT_TEST_SUITE_END();
 
 protected:
@@ -820,6 +822,21 @@ void Chart2ExportTest::testDataLabel3DChartDOCX()
     assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:barChart/c:ser/c:dLbls/c:dLbl/c:dLblPos", 0);
 }
 
+void Chart2ExportTest::testDataLabelDoughnutChartDOCX()
+{
+    load("/chart2/qa/extras/data/docx/", "doughnut-chart-labels.docx");
+
+    Reference<chart2::XChartDocument> xChartDoc(getChartDocFromWriter(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xChartDoc.is());
+
+    xmlDocPtr pXmlDoc = parseExport("word/charts/chart","Office Open XML Text");
+    CPPUNIT_ASSERT(pXmlDoc);
+
+    // We must not export label position attributes for doughnut charts.
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:doughnutChart/c:ser/c:dLbls/c:dLblPos", 0);
+    assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:plotArea/c:doughnutChart/c:ser/c:dLbls/c:dLbl/c:dLblPos", 0);
+}
+
 void Chart2ExportTest::testBarChartRotation()
 {
     load ("/chart2/qa/extras/data/docx/", "barChartRotation.docx");