Update test build rules to support mocking AConfig methods.

- Add mockito-inline-extended to allow mocking static methods.
- Add StaticMockitoRule to help mock static methods.
This helps in unit tests with mocking the trunk stable flags.

Bug: 294913042
Test: NA
Flag: NA
Change-Id: If53ae1d1bc68a5c6b1824b6c7060cbc14e095b1b

build.gradle

@@ -157,6 +157,8 @@ dependencies {
     withoutQuickstepImplementation fileTree(dir: "${FRAMEWORK_PREBUILTS_DIR}/libs", include: 'plugin_core.jar')
 
     testImplementation 'junit:junit:4.12'
+    testImplementation libs.mockitoInlineExtended
+    androidTestImplementation libs.mockitoInlineExtended
     androidTestImplementation "org.mockito:mockito-core:1.9.5"
     androidTestImplementation 'com.google.dexmaker:dexmaker:1.2'
     androidTestImplementation 'com.google.dexmaker:dexmaker-mockito:1.2'

tests/Android.bp

@@ -83,7 +83,7 @@ android_library {
         "androidx.test.espresso.contrib",
         "androidx.test.espresso.intents",
         "androidx.test.uiautomator_uiautomator",
-        "mockito-target-inline-minus-junit4",
+        "mockito-target-extended-minus-junit4",
         "launcher_log_protos_lite",
         "truth-prebuilt",
         "platform-test-rules",
@@ -114,6 +114,7 @@ android_test {
         "android.test.runner",
         "android.test.mock",
     ],
+    // Libraries used by mockito inline extended
     jni_libs: [
         "libdexmakerjvmtiagent",
         "libstaticjvmtiagent",

tests/src/com/android/launcher3/util/rule/StaticMockitoRule.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+package com.android.launcher3.util.rule;
+
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
+
+import com.android.dx.mockito.inline.extended.StaticMockitoSession;
+import com.android.dx.mockito.inline.extended.StaticMockitoSessionBuilder;
+
+import org.junit.rules.MethodRule;
+import org.junit.runners.model.FrameworkMethod;
+import org.junit.runners.model.Statement;
+import org.mockito.junit.MockitoRule;
+import org.mockito.quality.Strictness;
+
+/**
+ * Similar to {@link MockitoRule}, but uses {@link StaticMockitoSession}, which allows mocking
+ * static methods.
+ */
+public class StaticMockitoRule implements MethodRule {
+    private Class<?>[] mClasses;
+
+    public StaticMockitoRule(Class<?>... classes) {
+        mClasses = classes;
+    }
+
+    @Override
+    public Statement apply(Statement base, FrameworkMethod method, Object target) {
+        return new Statement() {
+            public void evaluate() throws Throwable {
+                StaticMockitoSessionBuilder builder =
+                        mockitoSession()
+                                .name(target.getClass().getSimpleName() + "." + method.getName())
+                                .initMocks(target)
+                                .strictness(Strictness.STRICT_STUBS);
+
+                for (Class<?> clazz : mClasses) {
+                    builder.mockStatic(clazz);
+                }
+
+                StaticMockitoSession session = builder.startMocking();
+                Throwable testFailure = evaluateSafely(base);
+                session.finishMocking(testFailure);
+                if (testFailure != null) {
+                    throw testFailure;
+                }
+            }
+
+            private Throwable evaluateSafely(Statement base) {
+                try {
+                    base.evaluate();
+                    return null;
+                } catch (Throwable throwable) {
+                    return throwable;
+                }
+            }
+        };
+    }
+}