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add testing fragment and ServiceLocator
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118
.../example/android/architecture/blueprints/todoapp/data/source/FakeAndroidTestRepository.kt
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| package com.example.android.architecture.blueprints.todoapp.data.source | ||
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| import androidx.annotation.VisibleForTesting | ||
| import androidx.lifecycle.LiveData | ||
| import androidx.lifecycle.MutableLiveData | ||
| import androidx.lifecycle.map | ||
| import com.example.android.architecture.blueprints.todoapp.data.Result | ||
| import com.example.android.architecture.blueprints.todoapp.data.Result.Error | ||
| import com.example.android.architecture.blueprints.todoapp.data.Result.Success | ||
| import com.example.android.architecture.blueprints.todoapp.data.Task | ||
| import kotlinx.coroutines.runBlocking | ||
| import java.util.LinkedHashMap | ||
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| class FakeAndroidTestRepository : TasksRepository { | ||
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| var tasksServiceData: LinkedHashMap<String, Task> = LinkedHashMap() | ||
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| private var shouldReturnError = false | ||
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| private val observableTasks = MutableLiveData<Result<List<Task>>>() | ||
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| fun setReturnError(value: Boolean) { | ||
| shouldReturnError = value | ||
| } | ||
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| override suspend fun refreshTasks() { | ||
| observableTasks.value = getTasks() | ||
| } | ||
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| override suspend fun refreshTask(taskId: String) { | ||
| refreshTasks() | ||
| } | ||
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| override fun observeTasks(): LiveData<Result<List<Task>>> { | ||
| runBlocking { refreshTasks() } | ||
| return observableTasks | ||
| } | ||
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| override fun observeTask(taskId: String): LiveData<Result<Task>> { | ||
| runBlocking { refreshTasks() } | ||
| return observableTasks.map { tasks -> | ||
| when (tasks) { | ||
| is Result.Loading -> Result.Loading | ||
| is Error -> Error(tasks.exception) | ||
| is Success -> { | ||
| val task = tasks.data.firstOrNull() { it.id == taskId } | ||
| ?: return@map Error(Exception("Not found")) | ||
| Success(task) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| override suspend fun getTask(taskId: String, forceUpdate: Boolean): Result<Task> { | ||
| if (shouldReturnError) { | ||
| return Error(Exception("Test exception")) | ||
| } | ||
| tasksServiceData[taskId]?.let { | ||
| return Success(it) | ||
| } | ||
| return Error(Exception("Could not find task")) | ||
| } | ||
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| override suspend fun getTasks(forceUpdate: Boolean): Result<List<Task>> { | ||
| if (shouldReturnError) { | ||
| return Error(Exception("Test exception")) | ||
| } | ||
| return Success(tasksServiceData.values.toList()) | ||
| } | ||
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| override suspend fun saveTask(task: Task) { | ||
| tasksServiceData[task.id] = task | ||
| } | ||
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| override suspend fun completeTask(task: Task) { | ||
| val completedTask = Task(task.title, task.description, true, task.id) | ||
| tasksServiceData[task.id] = completedTask | ||
| } | ||
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| override suspend fun completeTask(taskId: String) { | ||
| // Not required for the remote data source. | ||
| throw NotImplementedError() | ||
| } | ||
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| override suspend fun activateTask(task: Task) { | ||
| val activeTask = Task(task.title, task.description, false, task.id) | ||
| tasksServiceData[task.id] = activeTask | ||
| } | ||
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| override suspend fun activateTask(taskId: String) { | ||
| throw NotImplementedError() | ||
| } | ||
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| override suspend fun clearCompletedTasks() { | ||
| tasksServiceData = tasksServiceData.filterValues { | ||
| !it.isCompleted | ||
| } as LinkedHashMap<String, Task> | ||
| } | ||
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| override suspend fun deleteTask(taskId: String) { | ||
| tasksServiceData.remove(taskId) | ||
| refreshTasks() | ||
| } | ||
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| override suspend fun deleteAllTasks() { | ||
| tasksServiceData.clear() | ||
| refreshTasks() | ||
| } | ||
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| fun addTasks(vararg tasks: Task) { | ||
| for (task in tasks) { | ||
| tasksServiceData[task.id] = task | ||
| } | ||
| runBlocking { refreshTasks() } | ||
| } | ||
| } |
47 changes: 47 additions & 0 deletions
47
.../com/example/android/architecture/blueprints/todoapp/taskdetail/TaskDetailFragmentTest.kt
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| @@ -0,0 +1,47 @@ | ||
| package com.example.android.architecture.blueprints.todoapp.taskdetail | ||
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| import androidx.fragment.app.testing.launchFragmentInContainer | ||
| import androidx.test.ext.junit.runners.AndroidJUnit4 | ||
| import androidx.test.filters.MediumTest | ||
| import com.example.android.architecture.blueprints.todoapp.R | ||
| import com.example.android.architecture.blueprints.todoapp.ServiceLocator | ||
| import com.example.android.architecture.blueprints.todoapp.data.Task | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.FakeAndroidTestRepository | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.TasksRepository | ||
| import kotlinx.coroutines.ExperimentalCoroutinesApi | ||
| import kotlinx.coroutines.test.runBlockingTest | ||
| import org.junit.After | ||
| import org.junit.Assert.* | ||
| import org.junit.Before | ||
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| import org.junit.Test | ||
| import org.junit.runner.RunWith | ||
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| @MediumTest | ||
| @ExperimentalCoroutinesApi | ||
| @RunWith(AndroidJUnit4::class) | ||
| class TaskDetailFragmentTest { | ||
| private lateinit var repository: TasksRepository | ||
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| @Before | ||
| fun initRepository() { | ||
| repository = FakeAndroidTestRepository() | ||
| ServiceLocator.tasksRepository = repository | ||
| } | ||
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| @After | ||
| fun cleanupDb() = runBlockingTest { | ||
| ServiceLocator.resetRepository() | ||
| } | ||
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| @Test | ||
| fun activeTaskDetails_DisplayedInUi() = runBlockingTest { | ||
| // Given - add active (incomplete) task to the DB | ||
| val activeTask = Task("Active task", "Android rocks", false) | ||
| repository.saveTask(activeTask) | ||
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| // When - details fragment launched to display task | ||
| val bundle = TaskDetailFragmentArgs(activeTask.id).toBundle() | ||
| launchFragmentInContainer<TaskDetailFragment>(bundle, R.style.AppTheme) | ||
| } | ||
| } |
63 changes: 63 additions & 0 deletions
63
...s/app/src/main/java/com/example/android/architecture/blueprints/todoapp/ServiceLocator.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package com.example.android.architecture.blueprints.todoapp | ||
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| import android.content.Context | ||
| import androidx.annotation.VisibleForTesting | ||
| import androidx.room.Room | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.DefaultTasksRepository | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.TasksDataSource | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.TasksRepository | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.local.TasksLocalDataSource | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.local.ToDoDatabase | ||
| import com.example.android.architecture.blueprints.todoapp.data.source.remote.TasksRemoteDataSource | ||
| import kotlinx.coroutines.runBlocking | ||
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| object ServiceLocator { | ||
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| private var database: ToDoDatabase? = null | ||
| @Volatile | ||
| var tasksRepository: TasksRepository? = null | ||
| @VisibleForTesting set | ||
| private val lock = Any() | ||
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| fun provideTasksRepository(context: Context): TasksRepository { | ||
| synchronized(this) { | ||
| return tasksRepository ?: createTasksRepository(context) | ||
| } | ||
| } | ||
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| private fun createTasksRepository(context: Context): TasksRepository { | ||
| val newRepo = DefaultTasksRepository(TasksRemoteDataSource, createTaskLocalDataSource(context)) | ||
| tasksRepository = newRepo | ||
| return newRepo | ||
| } | ||
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| private fun createTaskLocalDataSource(context: Context): TasksDataSource { | ||
| val database = database ?: createDataBase(context) | ||
| return TasksLocalDataSource(database.taskDao()) | ||
| } | ||
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| private fun createDataBase(context: Context): ToDoDatabase { | ||
| val result = Room.databaseBuilder( | ||
| context.applicationContext, | ||
| ToDoDatabase::class.java, "Tasks.db" | ||
| ).build() | ||
| database = result | ||
| return result | ||
| } | ||
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| @VisibleForTesting | ||
| fun resetRepository() { | ||
| synchronized(lock) { | ||
| runBlocking { | ||
| TasksRemoteDataSource.deleteAllTasks() | ||
| } | ||
| // Clear all data to avoid test pollution. | ||
| database?.apply { | ||
| clearAllTables() | ||
| close() | ||
| } | ||
| database = null | ||
| tasksRepository = null | ||
| } | ||
| } | ||
| } |
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