[bug-65609] add naive test case

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1893792 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/poi-ooxml/src/test/java/org/apache/poi/xssf/streaming/TestSXSSFSheet.java b/poi-ooxml/src/test/java/org/apache/poi/xssf/streaming/TestSXSSFSheet.java
index 2d483e6185cb6507d12dcfbb0037c9b8a1ecc1c4..7d92af51a6973f7d2359fe687c83080f27a34e8f 100644 (file)
--- a/poi-ooxml/src/test/java/org/apache/poi/xssf/streaming/TestSXSSFSheet.java
+++ b/poi-ooxml/src/test/java/org/apache/poi/xssf/streaming/TestSXSSFSheet.java
@@ -25,10 +25,12 @@ import static org.junit.jupiter.api.Assertions.fail;
 
 import java.io.IOException;
 
+import org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream;
 import org.apache.poi.ss.tests.usermodel.BaseTestXSheet;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.xssf.SXSSFITestDataProvider;
+import org.apache.poi.xssf.usermodel.XSSFSheet;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Disabled;
@@ -121,6 +123,32 @@ public final class TestSXSSFSheet extends BaseTestXSheet {
         }
     }
 
+    @Test
+    void flushBufferedDaat() throws IOException {
+        try (UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream()) {
+            try (SXSSFWorkbook wb = new SXSSFWorkbook(1)) {
+                SXSSFSheet sheet = wb.createSheet("my-sheet");
+
+                sheet.createRow(1).createCell(0).setCellValue(1);
+                sheet.createRow(2).createCell(0).setCellValue(2);
+                sheet.createRow(3).createCell(0).setCellValue(3);
+
+                sheet.flushBufferedData();
+
+                sheet.createRow(4).createCell(0).setCellValue(4);
+                sheet.createRow(5).createCell(0).setCellValue(5);
+                sheet.createRow(6).createCell(0).setCellValue(6);
+
+                wb.write(bos);
+            }
+            try (XSSFWorkbook wb = new XSSFWorkbook(bos.toInputStream())) {
+                XSSFSheet sheet = wb.getSheet("my-sheet");
+                assertEquals(3, sheet.getRow(3).getCell(0).getNumericCellValue());
+                assertEquals(6, sheet.getRow(6).getCell(0).getNumericCellValue());
+            }
+        }
+    }
+
     @Test
     void overrideRowsInTemplate() throws IOException {
         try (XSSFWorkbook template = new XSSFWorkbook()) {