taskFaker.runNextTask()

    // Don't allow edits under any circumstances.
    assertThat(cache.edit("a")).isNull()
    assertThat(cache.edit("c")).isNull()
    cache["a"]!!.use {
      assertThat(it.edit()).isNull()
    }
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)

import assertk.assertions.contains
import assertk.assertions.hasMessage
import assertk.assertions.isCloseTo
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.fail
import java.io.IOException
import java.net.HttpURLConnection
import java.net.SocketTimeoutException
import java.time.Duration
import java.util.Arrays

import assertk.assertions.doesNotContain
import assertk.assertions.isEqualTo
import assertk.assertions.isIn
import assertk.assertions.isInstanceOf
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import assertk.assertions.isSameAs
import java.io.File
import java.io.IOException
import java.io.InterruptedIOException
import java.net.HttpURLConnection
import java.net.InetAddress
import java.net.InetSocketAddress