@Test // how's that for a name?
  public void testCreateFileSystemFromConfigurationWithWorkingDirectoryNotUnderConfiguredRoot() {
    try {
      Jimfs.newFileSystem(
          Configuration.windows().toBuilder()
              .setRoots("C:\\", "D:\\")
              .setWorkingDirectory("E:\\foo")
              .build());
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }
Tests for {@link Configuration}, {@link Configuration.Builder} and file systems created from
them.

@author Colin Decker
jimfs/src/test/java/com/google/common/jimfs/ConfigurationTest.java