Add another approach to disable tests from command line

.travis.yml

@@ -14,6 +14,9 @@ before_script:
   - echo no | android create avd --force -n test -t android-21 --abi armeabi-v7a
   - emulator -avd test -no-skin -no-audio -no-window &
   - android-wait-for-emulator
+  - adb shell settings put global window_animation_scale 0
+  - adb shell settings put global transition_animation_scale 0
+  - adb shell settings put global animator_duration_scale 0
   - adb shell input keyevent 82 &
 
 script:

app/src/androidTest/java/com/karumi/katasuperheroes/AnimationAwareTestRule.java

@@ -0,0 +1,138 @@
+/*
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * 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 com.karumi.katasuperheroes;
+
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.os.Build;
+import android.provider.Settings;
+import android.support.test.InstrumentationRegistry;
+import android.util.Log;
+
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+
+/**
+ * A test rule that will fail a test if animations or transitions are enabled on a device.
+ */
+public class AnimationAwareTestRule implements TestRule {
+
+  private static final String TAG = "AnimationAware";
+
+  public AnimationAwareTestRule() {
+  }
+
+  @Override public Statement apply(Statement base, Description description) {
+    return new AnimationAwareStatement(base);
+  }
+
+  private class AnimationAwareStatement extends Statement {
+
+    private Statement mBase;
+
+    public AnimationAwareStatement(Statement base) {
+      mBase = base;
+    }
+
+    @Override public void evaluate() throws Throwable {
+      checkForDisabledAnimationsAndTransitions(InstrumentationRegistry.getTargetContext());
+      mBase.evaluate();
+    }
+  }
+
+  private static void checkForDisabledAnimationsAndTransitions(Context context)
+      throws AnimationsEnabledException {
+
+    ContentResolver resolver = context.getContentResolver();
+    final float transitionAnimationScale = getTransitionAnimationScale(resolver);
+    final float windowAnimationScale = getWindowAnimationScale(resolver);
+    final float animatorDurationScale = getAnimatorDurationScale(resolver);
+
+    final boolean isEnabled = transitionAnimationScale + animatorDurationScale
+        + windowAnimationScale != 0;
+
+    if (isEnabled) {
+      throw new AnimationsEnabledException();
+    }
+  }
+
+  @SuppressWarnings("deprecation") @SuppressLint("InlinedApi")
+  private static float getTransitionAnimationScale(ContentResolver resolver) {
+    //noinspection deprecation
+    return getSetting(resolver, Settings.Global.TRANSITION_ANIMATION_SCALE,
+        Settings.System.TRANSITION_ANIMATION_SCALE);
+  }
+
+  @SuppressWarnings("deprecation") @SuppressLint("InlinedApi")
+  private static float getWindowAnimationScale(ContentResolver resolver) {
+    //noinspection deprecation
+    return getSetting(resolver, Settings.Global.WINDOW_ANIMATION_SCALE,
+        Settings.System.WINDOW_ANIMATION_SCALE);
+  }
+
+  @SuppressWarnings("deprecation") @SuppressLint("InlinedApi")
+  private static float getAnimatorDurationScale(ContentResolver resolver) {
+    return getSetting(resolver, Settings.Global.ANIMATOR_DURATION_SCALE,
+        Settings.System.ANIMATOR_DURATION_SCALE);
+  }
+
+  private static float getSetting(ContentResolver resolver, String current, String deprecated) {
+    if (isJellyBeanOrHigher()) {
+      return getGlobalSetting(resolver, current);
+    } else {
+      //noinspection deprecation
+      return getSystemSetting(resolver, deprecated);
+    }
+  }
+
+  private static boolean isJellyBeanOrHigher() {
+    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1;
+  }
+
+  @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
+  private static float getGlobalSetting(ContentResolver resolver, String setting) {
+    try {
+      return Settings.Global.getFloat(resolver, setting);
+    } catch (Settings.SettingNotFoundException e) {
+      Log.w(TAG, "getSystemSetting: Setting not found", e);
+      return 0;
+    }
+  }
+
+  private static float getSystemSetting(ContentResolver resolver, String setting) {
+    try {
+      return Settings.System.getFloat(resolver, setting);
+    } catch (Settings.SettingNotFoundException e) {
+      Log.w(TAG, "getSystemSetting: Setting not found", e);
+      return 0;
+    }
+  }
+
+  /**
+   * Error that's being thrown when your system has animations enabled and should not.
+   */
+  private static class AnimationsEnabledException extends RuntimeException {
+    public AnimationsEnabledException() {
+      super("To properly execute this test, disable animations and transitions "
+          + "on your device.\n"
+          + "For more info check: http://goo.gl/qVu1yV");
+    }
+  }
+}

app/src/androidTest/java/com/karumi/katasuperheroes/MainActivityTest.java

@@ -75,6 +75,8 @@
   @Rule public IntentsTestRule<MainActivity> activityRule =
       new IntentsTestRule<>(MainActivity.class, true, false);
 
+  @Rule public AnimationAwareTestRule mAnimationAwareTestRule = new AnimationAwareTestRule();
+
   @Mock SuperHeroesRepository repository;
 
   @Test public void showsEmptyCaseIfThereAreNoSuperHeroes() {