Merge "Introduce FakePermissionEnforcer"

tests/utils/testutils/java/android/os/test/FakePermissionEnforcer.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2023 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 android.os.test;
+
+import static android.permission.PermissionManager.PERMISSION_GRANTED;
+import static android.permission.PermissionManager.PERMISSION_HARD_DENIED;
+
+import android.annotation.NonNull;
+import android.content.AttributionSource;
+import android.os.PermissionEnforcer;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Fake for {@link PermissionEnforcer}. Useful for tests wanting to mock the
+ * permission checks of an AIDL service. FakePermissionEnforcer may be passed
+ * to the constructor of the AIDL-generated Stub class.
+ *
+ */
+public class FakePermissionEnforcer extends PermissionEnforcer {
+    private Set<String> mGranted;
+
+    public FakePermissionEnforcer() {
+        mGranted = new HashSet();
+    }
+
+    public void grant(String permission) {
+        mGranted.add(permission);
+    }
+
+    public void revoke(String permission) {
+        mGranted.remove(permission);
+    }
+
+    private boolean granted(String permission) {
+        return mGranted.contains(permission);
+    }
+
+    @Override
+    protected int checkPermission(@NonNull String permission,
+              @NonNull AttributionSource source) {
+        return granted(permission) ? PERMISSION_GRANTED : PERMISSION_HARD_DENIED;
+    }
+
+    @Override
+    protected int checkPermission(@NonNull String permission, int pid, int uid) {
+        return granted(permission) ? PERMISSION_GRANTED : PERMISSION_HARD_DENIED;
+    }
+}

tests/utils/testutils/java/android/os/test/OWNERS

@@ -0,0 +1 @@
+per-file FakePermissionEnforcer.java = file:/tests/EnforcePermission/OWNERS