@Test
  public void testPaths_equalityIsCaseSensitive() {
    assertThatPath("foo").isNotEqualTo(path("FOO"));
  }
Tests an in-memory file system through the public APIs in {@link Files}, etc. This also acts as
the tests for {@code FileSystemView}, as each public API method is (mostly) implemented by a
method in {@code FileSystemView}.

<p>These tests uses a Unix-like file system, but most of what they test applies to any file
system configuration.

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