@Test
  public void testNow() {
    assertThat(state.now()).isEqualTo(fileTimeSource.now());
    fileTimeSource.advance(Duration.ofSeconds(1));
    assertThat(state.now()).isEqualTo(fileTimeSource.now());
  }
Tests for {@link FileSystemState}.

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