MockitoKotlinHelpers.kt

/*
 * Copyright 2017, 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.
 *
 *
 * pulled from https://raw.githubusercontent.com/android/architecture-samples/todo-mvp-kotlin/todoapp/app/src/test/java/com/example/android/architecture/blueprints/todoapp/MockitoKotlinHelpers.kt
 */
package com.example.android.architecture.blueprints.todoapp

/**
 * Helper functions that are workarounds to kotlin Runtime Exceptions when using kotlin.
 */

import org.mockito.ArgumentCaptor
import org.mockito.Mockito

/**
 * Returns Mockito.eq() as nullable type to avoid java.lang.IllegalStateException when
 * null is returned.
 *
 * Generic T is nullable because implicitly bounded by Any?.
 */
fun <T> eq(obj: T): T = Mockito.eq<T>(obj)


/**
 * Returns Mockito.any() as nullable type to avoid java.lang.IllegalStateException when
 * null is returned.
 */
fun <T> any(): T = Mockito.any<T>()


/**
 * Returns ArgumentCaptor.capture() as nullable type to avoid java.lang.IllegalStateException
 * when null is returned.
 */
fun <T> capture(argumentCaptor: ArgumentCaptor<T>): T = argumentCaptor.capture()


/**
 * Helper function for creating an argumentCaptor in kotlin.
 */
inline fun <reified T : Any> argumentCaptor(): ArgumentCaptor<T> =
        ArgumentCaptor.forClass(T::class.java)