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42 changes: 42 additions & 0 deletions
42
app/src/main/java/com/esoxjem/movieguide/util/EspressoIdlingResource.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| /* | ||
| * Copyright 2015, 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. | ||
| */ | ||
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| package com.esoxjem.movieguide.util; | ||
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| import android.support.test.espresso.IdlingResource; | ||
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| /** | ||
| * Contains a static reference to {@link IdlingResource}, only available in the 'mock' build type. | ||
| */ | ||
| public class EspressoIdlingResource { | ||
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| private static final String RESOURCE = "GLOBAL"; | ||
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| private static SimpleCountingIdlingResource mCountingIdlingResource = | ||
| new SimpleCountingIdlingResource(RESOURCE); | ||
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| public static void increment() { | ||
| mCountingIdlingResource.increment(); | ||
| } | ||
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| public static void decrement() { | ||
| mCountingIdlingResource.decrement(); | ||
| } | ||
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| public static IdlingResource getIdlingResource() { | ||
| return mCountingIdlingResource; | ||
| } | ||
| } |
94 changes: 94 additions & 0 deletions
94
app/src/main/java/com/esoxjem/movieguide/util/SimpleCountingIdlingResource.java
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| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * Copyright (C) 2015 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. | ||
| */ | ||
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| package com.esoxjem.movieguide.util; | ||
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| import android.support.test.espresso.IdlingResource; | ||
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| import java.util.concurrent.atomic.AtomicInteger; | ||
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| import static com.google.common.base.Preconditions.checkNotNull; | ||
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| /** | ||
| * A simple counter implementation of {@link IdlingResource} that determines idleness by | ||
| * maintaining an internal counter. When the counter is 0 - it is considered to be idle, when it is | ||
| * non-zero it is not idle. This is very similar to the way a {@link java.util.concurrent.Semaphore} | ||
| * behaves. | ||
| * <p> | ||
| * This class can then be used to wrap up operations that while in progress should block tests from | ||
| * accessing the UI. | ||
| */ | ||
| public final class SimpleCountingIdlingResource implements IdlingResource { | ||
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| private final String mResourceName; | ||
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| private final AtomicInteger counter = new AtomicInteger(0); | ||
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| // written from main thread, read from any thread. | ||
| private volatile ResourceCallback resourceCallback; | ||
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| /** | ||
| * Creates a SimpleCountingIdlingResource | ||
| * | ||
| * @param resourceName the resource name this resource should report to Espresso. | ||
| */ | ||
| public SimpleCountingIdlingResource(String resourceName) { | ||
| mResourceName = checkNotNull(resourceName); | ||
| } | ||
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| @Override | ||
| public String getName() { | ||
| return mResourceName; | ||
| } | ||
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| @Override | ||
| public boolean isIdleNow() { | ||
| return counter.get() == 0; | ||
| } | ||
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| @Override | ||
| public void registerIdleTransitionCallback(ResourceCallback resourceCallback) { | ||
| this.resourceCallback = resourceCallback; | ||
| } | ||
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| /** | ||
| * Increments the count of in-flight transactions to the resource being monitored. | ||
| */ | ||
| public void increment() { | ||
| counter.getAndIncrement(); | ||
| } | ||
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| /** | ||
| * Decrements the count of in-flight transactions to the resource being monitored. | ||
| * | ||
| * If this operation results in the counter falling below 0 - an exception is raised. | ||
| * | ||
| * @throws IllegalStateException if the counter is below 0. | ||
| */ | ||
| public void decrement() { | ||
| int counterVal = counter.decrementAndGet(); | ||
| if (counterVal == 0) { | ||
| // we've gone from non-zero to zero. That means we're idle now! Tell espresso. | ||
| if (null != resourceCallback) { | ||
| resourceCallback.onTransitionToIdle(); | ||
| } | ||
| } | ||
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| if (counterVal < 0) { | ||
| throw new IllegalArgumentException("Counter has been corrupted!"); | ||
| } | ||
| } | ||
| } |