changed to us File.createTempFile

src/test/java/net/openhft/chronicle/map/Builder.java

@@ -38,8 +38,8 @@ public class Builder {
     static String WIN_OS = "WINDOWS";
 
     public static File getPersistenceFile() throws IOException {
-        String TMP = System.getProperty("java.io.tmpdir");
-        File file = new File(TMP + "/chm-test" + System.nanoTime() + (count++));
+
+        final File file = File.createTempFile("chm-test-", "map");
 
         //Not Guaranteed to work on Windows, since OS file-lock takes precedence
         if (System.getProperty("os.name").indexOf(WIN_OS) > 0) {

src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java

@@ -36,8 +36,6 @@ import static org.junit.Assert.*;
 @RunWith(value = Parameterized.class)
 public class CHMUseCasesTest {
 
-    private static final String TMP = System.getProperty("java.io.tmpdir");
-
 
     enum TypeOfMap {STATELESS, SIMPLE, SIMPLE_PERSISTED, REPLICATED}
 
@@ -180,8 +178,13 @@ public class CHMUseCasesTest {
 
 
     private void checkJsonSerilization() {
+        File file = null;
+        try {
+            file = File.createTempFile("chronicle-map-", ".json");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
 
-        File file = new File(TMP + "/chronicle-map-" + System.currentTimeMillis() + (i++) + System.nanoTime() + ".json");
         file.deleteOnExit();
         try {
 
@@ -228,8 +231,16 @@ public class CHMUseCasesTest {
                 return map1;
 
             case SIMPLE_PERSISTED:
-                final File file = new File(TMP + "/chronicle-map-" + (i++) + System.nanoTime() + System.currentTimeMillis() + ".map");
-                file.deleteOnExit();
+
+                File file0 = null;
+                try {
+                    file0 = File.createTempFile("chronicle-map-", ".map");
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+
+                file0.deleteOnExit();
+                final File file = file0;
                 map1 = builder.createPersistedTo(file);
                 closeables.add(map1);
                 closeables.add(new Closeable() {

src/test/java/net/openhft/chronicle/map/PostChannelCreationTest.java

@@ -50,8 +50,13 @@ public class PostChannelCreationTest {
     private ReplicationHub hubB;
 
     public static File getPersistenceFile() {
-        String TMP = System.getProperty("java.io.tmpdir");
-        File file = new File(TMP + "/test" + System.nanoTime());
+        File file = null;
+        try {
+            file = File.createTempFile("chm-test", "map");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
         file.deleteOnExit();
         return file;
     }
@@ -110,7 +115,8 @@ public class PostChannelCreationTest {
     }
 
     /**
-     * sets up a 2 clusters ( notionally one for each host ), and replicates 2 Chronicle Maps between them
+     * sets up a 2 clusters ( notionally one for each host ), and replicates 2 Chronicle Maps
+     * between them
      *
      * @throws IOException
      * @throws InterruptedException

src/test/java/net/openhft/chronicle/map/SingleMapChannelTest.java

@@ -26,7 +26,6 @@ import org.junit.Before;
 import org.junit.Test;
 
 import java.io.Closeable;
-import java.io.File;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
@@ -47,12 +46,7 @@ public class SingleMapChannelTest {
     private ReplicationHub hubA;
     private ReplicationHub hubB;
 
-    public static File getPersistenceFile() {
-        String TMP = System.getProperty("java.io.tmpdir");
-        File file = new File(TMP + "/test" + System.nanoTime());
-        file.deleteOnExit();
-        return file;
-    }
+
 
     @Before
     public void setup() throws IOException {