Add VTS tests for CarWatchdog daemon's public AIDLs.

Test: atest VtsAidlWatchdogTargetTest
Fixes: 178112547

Change-Id: I95828b3f48d66c047533255bd301b27967f65eb7
diff --git a/cpp/watchdog/server/src/IoOveruseMonitor.cpp b/cpp/watchdog/server/src/IoOveruseMonitor.cpp
index ddc606b..9e9dd23 100644
--- a/cpp/watchdog/server/src/IoOveruseMonitor.cpp
+++ b/cpp/watchdog/server/src/IoOveruseMonitor.cpp
@@ -528,7 +528,7 @@
     ioOveruseStats->startTime = startTime;
     ioOveruseStats->durationInSeconds = durationInSeconds;
     if (DEBUG) {
-        ALOGD("Returning I/O overuse listener for uid: %d", callingUid);
+        ALOGD("Returning I/O overuse stats for uid: %d", callingUid);
     }
     return {};
 }
diff --git a/cpp/watchdog/vts/Android.bp b/cpp/watchdog/vts/Android.bp
new file mode 100644
index 0000000..86854f9
--- /dev/null
+++ b/cpp/watchdog/vts/Android.bp
@@ -0,0 +1,41 @@
+//
+// Copyright (C) 2021 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 {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_test {
+    name: "VtsAidlWatchdogTargetTest",
+    defaults: [
+        "VtsHalTargetTestDefaults",
+        "use_libaidlvintf_gtest_helper_static",
+    ],
+    srcs: [
+        "VtsAidlWatchdogTargetTest.cpp",
+    ],
+    shared_libs: [
+        "libbinder",
+    ],
+    static_libs: [
+        "android.automotive.watchdog-V3-cpp",
+        "libgmock",
+    ],
+    test_suites: [
+        "general-tests",
+        "vts",
+    ],
+}
diff --git a/cpp/watchdog/vts/VtsAidlWatchdogTargetTest.cpp b/cpp/watchdog/vts/VtsAidlWatchdogTargetTest.cpp
new file mode 100644
index 0000000..af3c3e8
--- /dev/null
+++ b/cpp/watchdog/vts/VtsAidlWatchdogTargetTest.cpp
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#include <aidl/Gtest.h>
+#include <aidl/Vintf.h>
+#include <android-base/chrono_utils.h>
+#include <android-base/file.h>
+#include <android/automotive/watchdog/BnCarWatchdogClient.h>
+#include <android/automotive/watchdog/ICarWatchdog.h>
+#include <android/automotive/watchdog/IResourceOveruseListener.h>
+#include <android/automotive/watchdog/IoOveruseStats.h>
+#include <android/automotive/watchdog/PerStateBytes.h>
+#include <android/automotive/watchdog/ResourceOveruseStats.h>
+#include <android/automotive/watchdog/ResourceType.h>
+#include <binder/IBinder.h>
+#include <binder/IServiceManager.h>
+#include <binder/ProcessState.h>
+#include <binder/Status.h>
+#include <gmock/gmock.h>
+#include <utils/Condition.h>
+#include <utils/Mutex.h>
+#include <utils/StrongPointer.h>
+
+#include <unistd.h>
+
+#include <future>  // NOLINT(build/c++11)
+
+using ::android::BBinder;
+using ::android::Condition;
+using ::android::IBinder;
+using ::android::Mutex;
+using ::android::OK;
+using ::android::ProcessState;
+using ::android::sp;
+using ::android::status_t;
+using ::android::String16;
+using ::android::wp;
+using ::android::automotive::watchdog::BnCarWatchdogClient;
+using ::android::automotive::watchdog::ICarWatchdog;
+using ::android::automotive::watchdog::IoOveruseStats;
+using ::android::automotive::watchdog::IResourceOveruseListenerDefault;
+using ::android::automotive::watchdog::PerStateBytes;
+using ::android::automotive::watchdog::ResourceOveruseStats;
+using ::android::automotive::watchdog::ResourceType;
+using ::android::automotive::watchdog::TimeoutLength;
+using ::android::base::WriteStringToFile;
+using ::android::binder::Status;
+using ::testing::_;
+using ::testing::InitGoogleTest;
+using ::testing::Invoke;
+using ::testing::Return;
+using ::testing::TestWithParam;
+using ::testing::ValuesIn;
+
+namespace {
+
+constexpr std::chrono::nanoseconds kMaxWatchdogPingWaitTimeNs = 6s;
+
+class MockCarWatchdogClient : public BnCarWatchdogClient {
+public:
+    MockCarWatchdogClient() {}
+
+    MOCK_METHOD(Status, checkIfAlive, (int32_t, TimeoutLength), (override));
+    MOCK_METHOD(Status, prepareProcessTermination, (), (override));
+
+    void expectCheckIfAlive() {
+        EXPECT_CALL(*this, checkIfAlive(_, _))
+                .WillOnce(Invoke([&](int32_t sessionId, TimeoutLength timeoutLength) -> Status {
+                    Mutex::Autolock lock(mMutex);
+                    mSessionId = sessionId;
+                    mTimeoutLength = timeoutLength;
+                    mCond.signal();
+                    return Status::ok();
+                }));
+    }
+
+    void waitCheckIfAlive(TimeoutLength expectedTimeoutLength, int32_t* actualSessionId) {
+        Mutex::Autolock lock(mMutex);
+        ASSERT_THAT(mCond.waitRelative(mMutex, kMaxWatchdogPingWaitTimeNs.count()), OK);
+        ASSERT_THAT(mTimeoutLength, expectedTimeoutLength);
+        *actualSessionId = mSessionId;
+    }
+
+private:
+    Mutex mMutex;
+    Condition mCond GUARDED_BY(mMutex);
+    int32_t mSessionId GUARDED_BY(mMutex);
+    TimeoutLength mTimeoutLength GUARDED_BY(mMutex);
+};
+
+class MockBinder : public BBinder {
+public:
+    MOCK_METHOD(status_t, linkToDeath, (const sp<DeathRecipient>&, void*, uint32_t), (override));
+    MOCK_METHOD(status_t, unlinkToDeath,
+                (const wp<DeathRecipient>&, void*, uint32_t, wp<DeathRecipient>* outRecipient),
+                (override));
+};
+
+class MockResourceOveruseListener : public IResourceOveruseListenerDefault {
+public:
+    MockResourceOveruseListener() : mMockBinder(sp<MockBinder>::make()) {}
+
+    MOCK_METHOD(IBinder*, onAsBinder, (), (override));
+
+    void expectNormalBinder() {
+        EXPECT_CALL(*mMockBinder, linkToDeath(_, nullptr, 0)).WillRepeatedly(Return(OK));
+        EXPECT_CALL(*mMockBinder, unlinkToDeath(_, nullptr, 0, nullptr)).WillRepeatedly(Return(OK));
+        EXPECT_CALL(*this, onAsBinder()).WillRepeatedly(Return(mMockBinder.get()));
+    }
+
+private:
+    sp<MockBinder> mMockBinder;
+};
+
+}  // namespace
+
+class WatchdogAidlTest : public TestWithParam<std::string> {
+public:
+    virtual void SetUp() {
+        watchdogServer =
+                android::waitForDeclaredService<ICarWatchdog>(String16(GetParam().c_str()));
+        ASSERT_NE(watchdogServer.get(), nullptr);
+    }
+
+    sp<ICarWatchdog> watchdogServer;
+};
+
+TEST_P(WatchdogAidlTest, TestWatchdogClient) {
+    sp<MockCarWatchdogClient> mockClient = sp<MockCarWatchdogClient>::make();
+    mockClient->expectCheckIfAlive();
+    Status status = watchdogServer->registerClient(mockClient, TimeoutLength::TIMEOUT_CRITICAL);
+    ASSERT_TRUE(status.isOk()) << "Failed to register client: " << status.toString8();
+    int32_t sessionId;
+    ASSERT_NO_FATAL_FAILURE(
+            mockClient->waitCheckIfAlive(TimeoutLength::TIMEOUT_CRITICAL, &sessionId));
+    status = watchdogServer->tellClientAlive(mockClient, sessionId);
+    ASSERT_TRUE(status.isOk()) << "Failed to tell client alive: " << status.toString8();
+    status = watchdogServer->unregisterClient(mockClient);
+    ASSERT_TRUE(status.isOk()) << "Failed to unregister client: " << status.toString8();
+}
+
+TEST_P(WatchdogAidlTest, TestFailsRegisterClientWithNullptrClient) {
+    ASSERT_FALSE(watchdogServer->registerClient(nullptr, TimeoutLength::TIMEOUT_CRITICAL).isOk())
+            << "Should fail to register null client";
+}
+
+TEST_P(WatchdogAidlTest, TestFailsToTellClientAliveForNotRegisteredClient) {
+    sp<MockCarWatchdogClient> mockClient = sp<MockCarWatchdogClient>::make();
+    ASSERT_FALSE(watchdogServer->tellClientAlive(mockClient, 0).isOk())
+            << "Should fail tell client alive for not registered client";
+}
+
+TEST_P(WatchdogAidlTest, TestFailsToUnRegisterNotRegisteredClient) {
+    sp<MockCarWatchdogClient> mockClient = sp<MockCarWatchdogClient>::make();
+    ASSERT_FALSE(watchdogServer->unregisterClient(mockClient).isOk())
+            << "Should fail to unregister not registered client";
+}
+
+TEST_P(WatchdogAidlTest, TestResourceOveruseListener) {
+    sp<MockResourceOveruseListener> mockListener = sp<MockResourceOveruseListener>::make();
+    mockListener->expectNormalBinder();
+    Status status = watchdogServer->addResourceOveruseListener({ResourceType::IO}, mockListener);
+    ASSERT_TRUE(status.isOk()) << "Failed to add resource overuse listener: " << status.toString8();
+    status = watchdogServer->removeResourceOveruseListener(mockListener);
+    ASSERT_TRUE(status.isOk()) << "Failed to remove resource overuse listener: "
+                               << status.toString8();
+}
+
+TEST_P(WatchdogAidlTest, TestFailsAddResourceOveruseListenerWithNoResourceType) {
+    sp<MockResourceOveruseListener> mockListener = sp<MockResourceOveruseListener>::make();
+    mockListener->expectNormalBinder();
+    ASSERT_FALSE(watchdogServer->addResourceOveruseListener({}, mockListener).isOk())
+            << "Should fail to add resource overuse listener with no resource type";
+}
+
+TEST_P(WatchdogAidlTest, TestFailsAddResourceOveruseListenerWithNullptrListener) {
+    ASSERT_FALSE(watchdogServer->addResourceOveruseListener({ResourceType::IO}, nullptr).isOk())
+            << "Should fail to add null resource overuse listener";
+}
+
+TEST_P(WatchdogAidlTest, TestFailsToRemoveNotAddedResourceOveruseListener) {
+    sp<MockResourceOveruseListener> mockListener = sp<MockResourceOveruseListener>::make();
+    mockListener->expectNormalBinder();
+    ASSERT_FALSE(watchdogServer->removeResourceOveruseListener(mockListener).isOk())
+            << "Should fail to remote listener that is not added";
+}
+
+/*
+ * getResourceOveruseStats AIDL method is not tested as it requires writing to disk and waiting
+ * until the watchdog server has read I/O stats. The waiting duration depends on the watchdog
+ * server's performance data collection frequency, which varies between 20 - 60 seconds depending
+ * on the build type. The core implementation is tested in ATS with the help of custom performance
+ * data collection, which requires dumpsys access and this is not available to VTS. Thus skipping
+ * this test in VTS.
+ */
+
+TEST_P(WatchdogAidlTest, TestFailsGetResourceOveruseStatsWithNoResourceTypes) {
+    std::vector<ResourceOveruseStats> resourceOveruseStats;
+    ASSERT_FALSE(watchdogServer->getResourceOveruseStats({}, &resourceOveruseStats).isOk())
+            << "Should fail to fetch resource overuse stats with no resource types";
+}
+
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(WatchdogAidlTest);
+INSTANTIATE_TEST_SUITE_P(CarWatchdogServer, WatchdogAidlTest,
+                         ValuesIn(android::getAidlHalInstanceNames(ICarWatchdog::descriptor)),
+                         android::PrintInstanceNameToString);
+
+int main(int argc, char** argv) {
+    InitGoogleTest(&argc, argv);
+    ProcessState::self()->setThreadPoolMaxThreadCount(1);
+    ProcessState::self()->startThreadPool();
+    return RUN_ALL_TESTS();
+}