Handle tests being run on Unix

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/io/trunk@263865 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/org/apache/commons/io/FileSystemUtilsTestCase.java b/src/test/org/apache/commons/io/FileSystemUtilsTestCase.java
index 7a6f610..97f11b4 100644
--- a/src/test/org/apache/commons/io/FileSystemUtilsTestCase.java
+++ b/src/test/org/apache/commons/io/FileSystemUtilsTestCase.java
@@ -16,6 +16,7 @@
 package org.apache.commons.io;
 
 import java.io.BufferedReader;
+import java.io.File;
 import java.io.IOException;
 import java.io.StringReader;
 
@@ -54,7 +55,11 @@
     //-----------------------------------------------------------------------
     public void testGetFreeSpace_String() throws Exception {
         // test coverage, as we can't check value
-        assertEquals(true, FileSystemUtils.getFreeSpace("") > 0);
+        if (File.separatorChar == '/') {
+            assertEquals(true, FileSystemUtils.getFreeSpace("~") > 0);
+        } else {
+            assertEquals(true, FileSystemUtils.getFreeSpace("") > 0);
+        }
     }
 
     //-----------------------------------------------------------------------