set("k1", "a", "a")
    val snapshot = cache["k1"]!!
    assertThat(cache.edit("k1")).isNull()
    snapshot.close()
  }

  @Test
  fun `can read while reading`() {
    set("k1", "a", "a")
    cache["k1"]!!.use { snapshot1 ->
      snapshot1.assertValue(0, "a")
      cache["k1"]!!.use { snapshot2 ->
        snapshot2.assertValue(0, "a")
        snapshot1.assertValue(1, "a")

	// pause time (in milliseconds) between each snapshot at the end of the go routine leak detection.
	leakDetectPauseTimeMs = 50
)

// LeakDetect - type with  methods for go routine leak detection.
type LeakDetect struct {
	relevantRoutines map[string]bool
}

// NewLeakDetect - Initialize a LeakDetector with the snapshot of relevant Go routines.
func NewLeakDetect() LeakDetect {
	snapshot := LeakDetect{

        assertVersionOlder("1.0.0-SNAPSHOT", "1.1-SNAPSHOT");
        assertVersionOlder("1.1-SNAPSHOT", "1.2.0-SNAPSHOT");

        // assertVersionOlder( "1.0-alpha-1-SNAPSHOT", "1.0-SNAPSHOT" );
        assertVersionOlder("1.0-alpha-1-SNAPSHOT", "1.0-alpha-2-SNAPSHOT");
        assertVersionOlder("1.0-alpha-1-SNAPSHOT", "1.0-beta-1-SNAPSHOT");

        assertVersionOlder("1.0-beta-1-SNAPSHOT", "1.0-SNAPSHOT-SNAPSHOT");

## Snapshots and Documentation

Snapshots of Guava built from the `master` branch are available through Maven
using version `999.0.0-HEAD-jre-SNAPSHOT`, or `999.0.0-HEAD-android-SNAPSHOT`
for the Android flavor.

[Snapshot API Javadoc][guava-snapshot-api-docs] as well as
[Snapshot API Diffs][guava-snapshot-api-diffs] are also available.

        Artifact a = artifactFactory.createArtifactWithClassifier("groupId", "a", "0.0.1-SNAPSHOT", "jar", null);
        File file = new File(localRepository.getBasedir(), localRepository.pathOf(a));
        a.setFile(file);

        assertEquals(
                "a-0.0.1-SNAPSHOT.jar.lastUpdated",
                updateCheckManager.getTouchfile(a).getName());

        mavenProject.setArtifactId("myArtifact");
        mavenProject.setVersion("1.0-SNAPSHOT");
        when(artifact.getGroupId()).thenReturn("myGroup");
        when(artifact.getArtifactId()).thenReturn("myArtifact");
        when(artifact.getBaseVersion()).thenReturn(versionParser.parseVersion("1.0-SNAPSHOT"));
        projectManager.attachArtifact(project, artifact, artifactPath);

        assert response.json() == snapshot(
            [{"name": "Spider-Boy", "age": 18, "id": IsInt()}]
        )

        # Update a hero
        response = client.patch(
            f"/heroes/{hero_id}", json={"name": "Dog Pond", "age": None}
        )
        assert response.status_code == 200, response.text
        assert response.json() == snapshot(

        lifecycle(
            "Version: ${version.get()} " +
                "(base version: ${baseVersion.get()}," +
                " timestamp: ${buildTimestamp.get()}," +
                " snapshot: ${snapshot.get()})"
        )
    }

    val key = key(request.url)
    val snapshot: DiskLruCache.Snapshot =
      try {
        cache[key] ?: return null
      } catch (_: IOException) {
        return null // Give up because the cache cannot be read.
      }

    val entry: Entry =
      try {
        Entry(snapshot.getSource(ENTRY_METADATA))
      } catch (_: IOException) {
        snapshot.closeQuietly()
        return null
      }

        assert response.json() == snapshot(
            {"age": 30, "secret_name": "Dive Wilson", "id": 999, "name": "Dead Pond"}
        )

        # Read a hero
        hero_id = response.json()["id"]
        response = client.get(f"/heroes/{hero_id}")
        assert response.status_code == 200, response.text
        assert response.json() == snapshot(