Andrei Onea | 02d81c0 | 2019-11-18 14:21:44 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.compat.testing; |
| 18 | |
| 19 | import android.app.Instrumentation; |
| 20 | import android.compat.Compatibility; |
| 21 | import android.compat.Compatibility.ChangeConfig; |
| 22 | import android.content.Context; |
| 23 | import android.os.RemoteException; |
| 24 | import android.os.ServiceManager; |
| 25 | import android.support.test.InstrumentationRegistry; |
| 26 | |
| 27 | import com.android.internal.compat.CompatibilityChangeConfig; |
| 28 | import com.android.internal.compat.IPlatformCompat; |
| 29 | |
| 30 | import libcore.junit.util.compat.CoreCompatChangeRule; |
| 31 | |
| 32 | import org.junit.runners.model.Statement; |
| 33 | |
| 34 | /** |
| 35 | * Allows tests to specify the which change to disable. |
| 36 | * |
| 37 | * <p>To use add the following to the test class. It will only change the behavior of a test method |
| 38 | * if it is annotated with |
| 39 | * {@link libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges} and/or |
| 40 | * {@link libcore.junit.util.compat.CoreCompatChangeRule.DisableCompatChanges}. |
| 41 | * </p> |
| 42 | * <pre> |
| 43 | * @Rule |
| 44 | * public TestRule compatChangeRule = new PlatformCompatChangeRule(); |
| 45 | * </pre> |
| 46 | * |
| 47 | * <p>Each test method that needs to disable a specific change needs to be annotated |
| 48 | * with {@link libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges} and/or |
| 49 | * {@link libcore.junit.util.compat.CoreCompatChangeRule.DisableCompatChanges} specifying the change |
| 50 | * id. e.g.: |
| 51 | * </p> |
| 52 | * <pre> |
| 53 | * @Test |
| 54 | * @DisableCompatChanges({42}) |
| 55 | * public void testAsIfChange42Disabled() { |
| 56 | * // check behavior |
| 57 | * } |
| 58 | * |
| 59 | * @Test |
| 60 | * @EnableCompatChanges({42}) |
| 61 | * public void testAsIfChange42Enabled() { |
| 62 | * // check behavior |
| 63 | * |
| 64 | * </pre> |
| 65 | */ |
| 66 | public class PlatformCompatChangeRule extends CoreCompatChangeRule { |
| 67 | |
| 68 | @Override |
| 69 | protected Statement createStatementForConfig(final Statement statement, ChangeConfig config) { |
| 70 | return new CompatChangeStatement(statement, config); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | private static class CompatChangeStatement extends Statement { |
| 75 | private final Statement mTestStatement; |
| 76 | private final ChangeConfig mConfig; |
| 77 | |
| 78 | private CompatChangeStatement(Statement testStatement, ChangeConfig config) { |
| 79 | this.mTestStatement = testStatement; |
| 80 | this.mConfig = config; |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public void evaluate() throws Throwable { |
| 85 | Instrumentation instrumentation = InstrumentationRegistry.getInstrumentation(); |
| 86 | String packageName = instrumentation.getTargetContext().getPackageName(); |
| 87 | IPlatformCompat platformCompat = IPlatformCompat.Stub |
| 88 | .asInterface(ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE)); |
| 89 | if (platformCompat == null) { |
| 90 | throw new IllegalStateException("Could not get IPlatformCompat service!"); |
| 91 | } |
| 92 | Compatibility.setOverrides(mConfig); |
| 93 | try { |
| 94 | platformCompat.setOverridesForTest(new CompatibilityChangeConfig(mConfig), |
| 95 | packageName); |
| 96 | try { |
| 97 | mTestStatement.evaluate(); |
| 98 | } finally { |
| 99 | platformCompat.clearOverridesForTest(packageName); |
| 100 | } |
| 101 | } catch (RemoteException e) { |
| 102 | throw new RuntimeException("Could not call IPlatformCompat binder method!", e); |
| 103 | } finally { |
| 104 | Compatibility.clearOverrides(); |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | } |