| /* |
| * 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.activity.contextaware |
| |
| import android.content.Context |
| import android.os.Bundle |
| import androidx.test.core.app.ApplicationProvider |
| import androidx.test.ext.junit.runners.AndroidJUnit4 |
| import androidx.test.filters.SmallTest |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| |
| @SmallTest |
| @RunWith(AndroidJUnit4::class) |
| class ContextAwareHelperTest { |
| private val contextAware = TestContextAware() |
| |
| @Test |
| fun addOnContextAvailableListener() { |
| var receivedContextAware: ContextAware? = null |
| val listener = OnContextAvailableListener { contextAware, _, _ -> |
| receivedContextAware = contextAware |
| } |
| contextAware.addOnContextAvailableListener(listener) |
| contextAware.dispatchOnContextAvailable() |
| |
| assertThat(receivedContextAware).isSameInstanceAs(contextAware) |
| } |
| |
| @Test |
| fun removeOnContextAvailableListener() { |
| var callbackCount = 0 |
| val listener = OnContextAvailableListener { _, _, _ -> |
| callbackCount++ |
| } |
| contextAware.addOnContextAvailableListener(listener) |
| contextAware.dispatchOnContextAvailable() |
| |
| assertThat(callbackCount).isEqualTo(1) |
| |
| // Now remove the listener and check that the count doesn't increase |
| contextAware.removeOnContextAvailableListener(listener) |
| contextAware.dispatchOnContextAvailable() |
| |
| assertThat(callbackCount).isEqualTo(1) |
| } |
| |
| @Test |
| fun reentrantRemove() { |
| var callbackCount = 0 |
| val listener = object : OnContextAvailableListener { |
| override fun onContextAvailable( |
| contextAware: ContextAware, |
| context: Context, |
| savedInstanceState: Bundle? |
| ) { |
| callbackCount++ |
| contextAware.removeOnContextAvailableListener(this) |
| } |
| } |
| contextAware.addOnContextAvailableListener(listener) |
| contextAware.dispatchOnContextAvailable() |
| |
| assertThat(callbackCount).isEqualTo(1) |
| |
| callbackCount = 0 |
| contextAware.dispatchOnContextAvailable() |
| |
| assertThat(callbackCount).isEqualTo(0) |
| } |
| } |
| |
| class TestContextAware : ContextAware { |
| private val contextAwareHelper = ContextAwareHelper(this) |
| |
| override fun addOnContextAvailableListener(listener: OnContextAvailableListener) { |
| contextAwareHelper.addOnContextAvailableListener(listener) |
| } |
| |
| override fun removeOnContextAvailableListener(listener: OnContextAvailableListener) { |
| contextAwareHelper.removeOnContextAvailableListener(listener) |
| } |
| |
| fun dispatchOnContextAvailable(savedInstanceState: Bundle? = null) { |
| contextAwareHelper.dispatchOnContextAvailable( |
| ApplicationProvider.getApplicationContext(), savedInstanceState) |
| } |
| } |