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/*
* Copyright (C) 2021 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 com.android.net.module.util
import android.net.NetworkStats
import android.text.TextUtils
import androidx.test.filters.SmallTest
import androidx.test.runner.AndroidJUnit4
import org.junit.Test
import org.junit.runner.RunWith
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
import org.mockito.Mockito.doReturn
import org.mockito.Mockito.mock
@RunWith(AndroidJUnit4::class)
@SmallTest
class NetworkStatsUtilsTest {
@Test
fun testMultiplySafeByRational() {
// Verify basic cases that the method equals to a * b / c.
assertEquals(3 * 5 / 2, NetworkStatsUtils.multiplySafeByRational(3, 5, 2))
// Verify input with zeros.
assertEquals(0 * 7 / 3, NetworkStatsUtils.multiplySafeByRational(0, 7, 3))
assertEquals(7 * 0 / 3, NetworkStatsUtils.multiplySafeByRational(7, 0, 3))
assertEquals(0 * 0 / 1, NetworkStatsUtils.multiplySafeByRational(0, 0, 1))
assertEquals(0, NetworkStatsUtils.multiplySafeByRational(0, Long.MAX_VALUE, Long.MAX_VALUE))
assertEquals(0, NetworkStatsUtils.multiplySafeByRational(Long.MAX_VALUE, 0, Long.MAX_VALUE))
assertFailsWith<ArithmeticException> {
NetworkStatsUtils.multiplySafeByRational(7, 3, 0)
}
assertFailsWith<ArithmeticException> {
NetworkStatsUtils.multiplySafeByRational(0, 0, 0)
}
// Verify cases where a * b overflows.
assertEquals(101, NetworkStatsUtils.multiplySafeByRational(
101, Long.MAX_VALUE, Long.MAX_VALUE))
assertEquals(721, NetworkStatsUtils.multiplySafeByRational(
Long.MAX_VALUE, 721, Long.MAX_VALUE))
assertEquals(Long.MAX_VALUE, NetworkStatsUtils.multiplySafeByRational(
Long.MAX_VALUE, Long.MAX_VALUE, Long.MAX_VALUE))
assertFailsWith<ArithmeticException> {
NetworkStatsUtils.multiplySafeByRational(Long.MAX_VALUE, Long.MAX_VALUE, 0)
}
}
@Test
fun testConstrain() {
assertFailsWith<IllegalArgumentException> {
NetworkStatsUtils.constrain(5, 6, 3) // low > high
}
assertEquals(3, NetworkStatsUtils.constrain(5, 1, 3))
assertEquals(3, NetworkStatsUtils.constrain(3, 1, 3))
assertEquals(2, NetworkStatsUtils.constrain(2, 1, 3))
assertEquals(1, NetworkStatsUtils.constrain(1, 1, 3))
assertEquals(1, NetworkStatsUtils.constrain(0, 1, 3))
assertEquals(11, NetworkStatsUtils.constrain(15, 11, 11))
assertEquals(11, NetworkStatsUtils.constrain(11, 11, 11))
assertEquals(11, NetworkStatsUtils.constrain(1, 11, 11))
}
@Test
fun testBucketToEntry() {
val bucket = makeMockBucket(android.app.usage.NetworkStats.Bucket.UID_ALL,
android.app.usage.NetworkStats.Bucket.TAG_NONE,
android.app.usage.NetworkStats.Bucket.STATE_DEFAULT,
android.app.usage.NetworkStats.Bucket.METERED_YES,
android.app.usage.NetworkStats.Bucket.ROAMING_NO,
android.app.usage.NetworkStats.Bucket.DEFAULT_NETWORK_ALL, 1024, 8, 2048, 12)
val entry = NetworkStatsUtils.fromBucket(bucket)
val expectedEntry = NetworkStats.Entry(null /* IFACE_ALL */, NetworkStats.UID_ALL,
NetworkStats.SET_DEFAULT, NetworkStats.TAG_NONE, NetworkStats.METERED_YES,
NetworkStats.ROAMING_NO, NetworkStats.DEFAULT_NETWORK_ALL, 1024, 8, 2048, 12,
0 /* operations */)
// TODO: Use assertEquals once all downstreams accept null iface in
// NetworkStats.Entry#equals.
assertEntryEquals(expectedEntry, entry)
}
private fun makeMockBucket(
uid: Int,
tag: Int,
state: Int,
metered: Int,
roaming: Int,
defaultNetwork: Int,
rxBytes: Long,
rxPackets: Long,
txBytes: Long,
txPackets: Long
): android.app.usage.NetworkStats.Bucket {
val ret: android.app.usage.NetworkStats.Bucket =
mock(android.app.usage.NetworkStats.Bucket::class.java)
doReturn(uid).`when`(ret).getUid()
doReturn(tag).`when`(ret).getTag()
doReturn(state).`when`(ret).getState()
doReturn(metered).`when`(ret).getMetered()
doReturn(roaming).`when`(ret).getRoaming()
doReturn(defaultNetwork).`when`(ret).getDefaultNetworkStatus()
doReturn(rxBytes).`when`(ret).getRxBytes()
doReturn(rxPackets).`when`(ret).getRxPackets()
doReturn(txBytes).`when`(ret).getTxBytes()
doReturn(txPackets).`when`(ret).getTxPackets()
return ret
}
/**
* Assert that the two {@link NetworkStats.Entry} are equals.
*/
private fun assertEntryEquals(left: NetworkStats.Entry, right: NetworkStats.Entry) {
TextUtils.equals(left.iface, right.iface)
assertEquals(left.uid, right.uid)
assertEquals(left.set, right.set)
assertEquals(left.tag, right.tag)
assertEquals(left.metered, right.metered)
assertEquals(left.roaming, right.roaming)
assertEquals(left.defaultNetwork, right.defaultNetwork)
assertEquals(left.rxBytes, right.rxBytes)
assertEquals(left.rxPackets, right.rxPackets)
assertEquals(left.txBytes, right.txBytes)
assertEquals(left.txPackets, right.txPackets)
assertEquals(left.operations, right.operations)
}
}
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