From b2e807c0050f3f81db7786d6bf4e3102fdfa9dfe Mon Sep 17 00:00:00 2001
From: Javen O'Neal <onealj@apache.org>
Date: Thu, 19 Jan 2017 08:51:04 +0000
Subject: [PATCH] bug 60601: allow
 SXSSFITestDataProvider.writeOutAndReadBack(Workbook wb) to work on
 SXSSFWorkbooks and XSSFWorkbooks

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1779433 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/poi/xssf/SXSSFITestDataProvider.java          | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ooxml/testcases/org/apache/poi/xssf/SXSSFITestDataProvider.java b/src/ooxml/testcases/org/apache/poi/xssf/SXSSFITestDataProvider.java
index 4f2eb40f9..ab84979d0 100644
--- a/src/ooxml/testcases/org/apache/poi/xssf/SXSSFITestDataProvider.java
+++ b/src/ooxml/testcases/org/apache/poi/xssf/SXSSFITestDataProvider.java
@@ -64,7 +64,10 @@ public final class SXSSFITestDataProvider implements ITestDataProvider {
      */
     @Override
     public XSSFWorkbook writeOutAndReadBack(Workbook wb) {
-        if(!(wb instanceof SXSSFWorkbook)) {
+        // wb is usually an SXSSFWorkbook, but must also work on an XSSFWorkbook
+        // since workbooks must be able to be written out and read back
+        // several times in succession
+        if(!(wb instanceof SXSSFWorkbook || wb instanceof XSSFWorkbook)) {
             throw new IllegalArgumentException("Expected an instance of SXSSFWorkbook");
         }