Refactor coroutine testing setup (#1583)

* coroutine-utils: init

* coroutine-utils-testing: init

* format-common: switch over to using DispatcherProvider

* Convert Binds method to an extension function

* Add Dispatcher module

1 files changed, 22 insertions, 0 deletions

diff --git a/coroutine-utils/src/main/kotlin/dev/msfjarvis/aps/util/coroutines/DispatcherProvider.kt b/coroutine-utils/src/main/kotlin/dev/msfjarvis/aps/util/coroutines/DispatcherProvider.kt
new file mode 100644
index 00000000..a7c4530d
--- /dev/null
+++ b/coroutine-utils/src/main/kotlin/dev/msfjarvis/aps/util/coroutines/DispatcherProvider.kt
@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package dev.msfjarvis.aps.util.coroutines
+
+import javax.inject.Inject
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+
+/** Interface to allow abstracting individual [CoroutineDispatcher]s out of class dependencies. */
+public interface DispatcherProvider {
+
+  public fun main(): CoroutineDispatcher = Dispatchers.Main
+  public fun default(): CoroutineDispatcher = Dispatchers.Default
+  public fun io(): CoroutineDispatcher = Dispatchers.IO
+  public fun unconfined(): CoroutineDispatcher = Dispatchers.Unconfined
+}
+
+/** Concrete type for [DispatcherProvider] with all the defaults from the class. */
+public class DefaultDispatcherProvider @Inject constructor() : DispatcherProvider