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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.ui.text
import com.google.common.truth.Truth
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
private class MockedTimeProvider : ExpireAfterAccessCache.TimeProvider {
var currentTime: Long = 0
override fun getTime() = currentTime
}
private const val twoSecondsInNanos = 2_000_000_000
private const val tenMillisInNanos = 10_000_000
@RunWith(JUnit4::class)
class CacheTest {
private val time = MockedTimeProvider()
private val cache = ExpireAfterAccessCache<String, String>(
expireAfterNanos = 1_000_000_000L, // 1 second
timeProvider = time
)
@Test
fun single_key() {
cache.get("k1") { "v1" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k1")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k1")
var valueFromCache = cache.get("k1") { "v1_2" }
Truth.assertThat(valueFromCache).isEqualTo("v1")
time.currentTime += twoSecondsInNanos
valueFromCache = cache.get("k1") { "v1_3" }
Truth.assertThat(valueFromCache).isEqualTo("v1")
Truth.assertThat(cache.accessQueue.head!!.accessTime)
.isEqualTo(twoSecondsInNanos)
}
@Test
fun two_keys() {
cache.get("k1") { "v1" }
time.currentTime += tenMillisInNanos
cache.get("k2") { "v2" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k2")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k1")
time.currentTime += tenMillisInNanos
var valueFromCache = cache.get("k1") { "v1_2" }
Truth.assertThat(valueFromCache).isEqualTo("v1")
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k1")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k2")
// expiration
time.currentTime += twoSecondsInNanos
cache.get("k1") { "v1_3" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k1")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k1")
Truth.assertThat(cache.map.size)
.isEqualTo(1)
}
@Test
fun three_keys() {
cache.get("k1") { "v1" }
cache.get("k2") { "v2" }
cache.get("k3") { "v3" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k3")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k1")
cache.get("k2") { "v2_2" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k2")
Truth.assertThat(cache.accessQueue.tail!!.key)
.isEqualTo("k1")
Truth.assertThat(cache.accessQueue.tail!!.nextInAccess!!.key)
.isEqualTo("k3")
time.currentTime += twoSecondsInNanos
cache.get("k3") { "v3_3" }
Truth.assertThat(cache.accessQueue.head!!.key)
.isEqualTo("k3")
Truth.assertThat(cache.accessQueue.head!!)
.isEqualTo(cache.accessQueue.tail!!)
Truth.assertThat(cache.accessQueue.tail!!.prevInAccess).isNull()
Truth.assertThat(cache.accessQueue.tail!!.nextInAccess).isNull()
Truth.assertThat(cache.map.size)
.isEqualTo(1)
}
}