assertArrayEquals(new String[] { "x", "y" }, item.getInputs());
        assertEquals("z", item.getOutput());
    }

    // Test concurrent modification
    public void test_concurrentModification() throws Exception {
        writeTestFile("a,b => c\nd,e => f\n");

        // Get an item
        OptionalEntity<CharMappingItem> item1 = charMappingFile.get(1L);
        assertTrue(item1.isPresent());

    assertEquals(Level.INFO, record.getLevel());
    assertEquals("message", record.getMessage());
    assertSame(EXCEPTION, record.getThrown());
  }

  public void testConcurrentModification() throws Exception {
    // Tests for the absence of a bug where logging while iterating over the
    // stored log records causes a ConcurrentModificationException
    assertTrue(handler.getStoredLogRecords().isEmpty());