writeUtf8(
        // No trailing newline.
        """
        |${DiskLruCache.MAGIC}
        |${DiskLruCache.VERSION_1}
        |100
        |2
        |
        |CLEAN k1 1 1
        """.trimMargin(),
      )
    }
    createNewCache()
    assertThat(cache["k1"]).isNull()

    // The journal is not corrupt when editing after a truncated line.
    set("k1", "C", "D")
    cache.close()