| /* |
| * Copyright (C) 2019 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.server |
| |
| import androidx.test.filters.SmallTest |
| import androidx.test.runner.AndroidJUnit4 |
| import com.android.server.NetIdManager.MIN_NET_ID |
| import com.android.testutils.assertThrows |
| import com.android.testutils.ExceptionUtils.ThrowingRunnable |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import kotlin.test.assertEquals |
| |
| @RunWith(AndroidJUnit4::class) |
| @SmallTest |
| class NetIdManagerTest { |
| @Test |
| fun testReserveReleaseNetId() { |
| val manager = NetIdManager(MIN_NET_ID + 4) |
| assertEquals(MIN_NET_ID, manager.reserveNetId()) |
| assertEquals(MIN_NET_ID + 1, manager.reserveNetId()) |
| assertEquals(MIN_NET_ID + 2, manager.reserveNetId()) |
| assertEquals(MIN_NET_ID + 3, manager.reserveNetId()) |
| |
| manager.releaseNetId(MIN_NET_ID + 1) |
| manager.releaseNetId(MIN_NET_ID + 3) |
| // IDs only loop once there is no higher ID available |
| assertEquals(MIN_NET_ID + 4, manager.reserveNetId()) |
| assertEquals(MIN_NET_ID + 1, manager.reserveNetId()) |
| assertEquals(MIN_NET_ID + 3, manager.reserveNetId()) |
| assertThrows(IllegalStateException::class.java, ThrowingRunnable { manager.reserveNetId() }) |
| manager.releaseNetId(MIN_NET_ID + 5) |
| // Still no ID available: MIN_NET_ID + 5 was not reserved |
| assertThrows(IllegalStateException::class.java, ThrowingRunnable { manager.reserveNetId() }) |
| manager.releaseNetId(MIN_NET_ID + 2) |
| // Throwing an exception still leaves the manager in a working state |
| assertEquals(MIN_NET_ID + 2, manager.reserveNetId()) |
| } |
| } |