JAL-2727 alignment width and height tailored to this test

diff --git a/test/jalview/gui/FreeUpMemoryTest.java b/test/jalview/gui/FreeUpMemoryTest.java
index 2a9a8c9..9fc0678 100644 (file)
--- a/test/jalview/gui/FreeUpMemoryTest.java
+++ b/test/jalview/gui/FreeUpMemoryTest.java
@@ -17,7 +17,7 @@ import org.testng.annotations.Test;
 
 public class FreeUpMemoryTest
 {
-  private static final int ONE_MB = 1024 * 1024;
+  private static final int ONE_MB = 1000 * 1000;
 
   /**
    * Configure (read-only) Jalview property settings for test
@@ -75,21 +75,27 @@ public class FreeUpMemoryTest
     af.closeMenuItem_actionPerformed(true);
 
     /*
-     * request garbage collection and allow 1 second for it to complete;
-     * NB there is no guarantee when, or whether, it will run!
+     * request garbage collection and wait briefly for it to run;
+     * NB there is no guarantee when, or whether, it will do so
      */
     System.gc();
     synchronized (this)
     {
       try
       {
-        wait(1000);
+        wait(10);
       } catch (InterruptedException e)
       {
       }
     }
 
     /*
+     * a second gc() call should not be necessary - but it is!
+     * the test passes with it, and fails without it
+     */
+    System.gc();
+
+    /*
      * check used memory is 'reasonably low'
      */
     long availableMemory = Runtime.getRuntime().totalMemory() / ONE_MB;
@@ -105,9 +111,10 @@ public class FreeUpMemoryTest
      * - identify large objects in the heap and their referers
      * - fix code as necessary to null the references on close
      */
-    long expectedMax = 100L;
-    assertTrue(usedMemory < expectedMax,
-            String.format("Used memory %d > %d", usedMemory, expectedMax));
+    long expectedMax = 30L; // typically reports around 25
+    assertTrue(usedMemory < expectedMax, String.format(
+            "Used memory %d should be less than %d", usedMemory,
+            expectedMax));
   }
 
   /**
@@ -129,8 +136,11 @@ public class FreeUpMemoryTest
   }
 
   /**
-   * Generates an alignment (large enough for this test but not so large it is
-   * too slow or runs out of memory) and saves it in a temporary file.
+   * Generates an alignment and saves it in a temporary file, to be loaded by
+   * Jalview. We use a peptide alignment (so Conservation and Quality are
+   * calculated), which is wide enough to ensure Consensus, Conservation and
+   * Occupancy have a significant memory footprint (if not removed from the
+   * heap).
    * 
    * @return
    * @throws IOException
@@ -140,7 +150,9 @@ public class FreeUpMemoryTest
     File f = File.createTempFile("MemoryTest", "fa");
     PrintStream ps = new PrintStream(f);
     AlignmentGenerator ag = new AlignmentGenerator(false, ps);
-    ag.generate(1000, 20000, 0, 10, 15);
+    int width = 100000;
+    int height = 100;
+    ag.generate(width, height, 0, 10, 15);
     return f;
   }
 }