Add AIDL Lights HAL to support multiple lights per type

This is a revision of the previous 2.0 HIDL-based light HAL.
It accomplishes 2 goals:
 1) Support more than 1 light for a given type. This allows Assistant to
    use the HAL on TV platforms that have usually 4 indicator lights.
 2) Use AIDL, which is the more modern way of writing HALs.
The previous HAL is in hardware/interfaces/light/2.0 and the new one is
in versioned as aidl, as that supports forward compatibility.

Test: atest VtsHalLightTargetTest
Bug: 142715294, 142230898
Change-Id: I6d8c12b3df88e02f2a0fff8b6aa8543372b510c8
Merged-In: I08d831ca0380d8bb187e43f6d5c214810ff72f50

1 files changed, 171 insertions, 0 deletions

diff --git a/light/aidl/vts/functional/VtsHalLightTargetTest.cpp b/light/aidl/vts/functional/VtsHalLightTargetTest.cpp
new file mode 100644
index 0000000000..3c26278a19
--- /dev/null
+++ b/light/aidl/vts/functional/VtsHalLightTargetTest.cpp
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#define LOG_TAG "light_aidl_hal_test"
+
+#include <aidl/Gtest.h>
+#include <aidl/Vintf.h>
+
+#include <android-base/logging.h>
+#include <android/hardware/light/ILights.h>
+#include <binder/IServiceManager.h>
+#include <binder/ProcessState.h>
+#include <gtest/gtest.h>
+#include <hidl/GtestPrinter.h>
+#include <hidl/ServiceManagement.h>
+
+#include <unistd.h>
+#include <set>
+
+using android::ProcessState;
+using android::sp;
+using android::String16;
+using android::binder::Status;
+using android::hardware::hidl_vec;
+using android::hardware::Return;
+using android::hardware::Void;
+using android::hardware::light::BrightnessMode;
+using android::hardware::light::FlashMode;
+using android::hardware::light::HwLight;
+using android::hardware::light::HwLightState;
+using android::hardware::light::ILights;
+using android::hardware::light::LightType;
+
+#define ASSERT_OK(ret) ASSERT_TRUE(ret.isOk())
+#define EXPECT_OK(ret) EXPECT_TRUE(ret.isOk())
+
+const std::set<LightType> kAllTypes{android::enum_range<LightType>().begin(),
+                                    android::enum_range<LightType>().end()};
+
+class LightsAidl : public testing::TestWithParam<std::string> {
+  public:
+    virtual void SetUp() override {
+        lights = android::waitForDeclaredService<ILights>(String16(GetParam().c_str()));
+        ASSERT_NE(lights, nullptr);
+        ASSERT_TRUE(lights->getLights(&supportedLights).isOk());
+    }
+
+    sp<ILights> lights;
+    std::vector<HwLight> supportedLights;
+
+    virtual void TearDown() override {
+        for (const HwLight& light : supportedLights) {
+            HwLightState off;
+            off.color = 0x00000000;
+            off.flashMode = FlashMode::NONE;
+            off.brightnessMode = BrightnessMode::USER;
+            EXPECT_TRUE(lights->setLightState(light.id, off).isOk());
+        }
+
+        // must leave the device in a useable condition
+        for (const HwLight& light : supportedLights) {
+            if (light.type == LightType::BACKLIGHT) {
+                HwLightState backlightOn;
+                backlightOn.color = 0xFFFFFFFF;
+                backlightOn.flashMode = FlashMode::TIMED;
+                backlightOn.brightnessMode = BrightnessMode::USER;
+                EXPECT_TRUE(lights->setLightState(light.id, backlightOn).isOk());
+            }
+        }
+    }
+};
+
+/**
+ * Ensure all reported lights actually work.
+ */
+TEST_P(LightsAidl, TestSupported) {
+    HwLightState whiteFlashing;
+    whiteFlashing.color = 0xFFFFFFFF;
+    whiteFlashing.flashMode = FlashMode::TIMED;
+    whiteFlashing.flashOnMs = 100;
+    whiteFlashing.flashOffMs = 50;
+    whiteFlashing.brightnessMode = BrightnessMode::USER;
+    for (const HwLight& light : supportedLights) {
+        EXPECT_TRUE(lights->setLightState(light.id, whiteFlashing).isOk());
+    }
+}
+
+/**
+ * Ensure all reported lights have one of the supported types.
+ */
+TEST_P(LightsAidl, TestSupportedLightTypes) {
+    for (const HwLight& light : supportedLights) {
+        EXPECT_TRUE(kAllTypes.find(light.type) != kAllTypes.end());
+    }
+}
+
+/**
+ * Ensure all lights have a unique id.
+ */
+TEST_P(LightsAidl, TestUniqueIds) {
+    std::set<int> ids;
+    for (const HwLight& light : supportedLights) {
+        EXPECT_TRUE(ids.find(light.id) == ids.end());
+        ids.insert(light.id);
+    }
+}
+
+/**
+ * Ensure all lights have a unique ordinal for a given type.
+ */
+TEST_P(LightsAidl, TestUniqueOrdinalsForType) {
+    std::map<int, std::set<int>> ordinalsByType;
+    for (const HwLight& light : supportedLights) {
+        auto& ordinals = ordinalsByType[(int)light.type];
+        EXPECT_TRUE(ordinals.find(light.ordinal) == ordinals.end());
+        ordinals.insert(light.ordinal);
+    }
+}
+
+/**
+ * Ensure EX_UNSUPPORTED_OPERATION is returned if LOW_PERSISTENCE is not supported.
+ */
+TEST_P(LightsAidl, TestLowPersistence) {
+    HwLightState lowPersistence;
+    lowPersistence.color = 0xFF123456;
+    lowPersistence.flashMode = FlashMode::TIMED;
+    lowPersistence.flashOnMs = 100;
+    lowPersistence.flashOffMs = 50;
+    lowPersistence.brightnessMode = BrightnessMode::LOW_PERSISTENCE;
+    for (const HwLight& light : supportedLights) {
+        Status status = lights->setLightState(light.id, lowPersistence);
+        EXPECT_TRUE(status.isOk() || Status::EX_UNSUPPORTED_OPERATION == status.exceptionCode());
+    }
+}
+
+/**
+ * Ensure EX_UNSUPPORTED_OPERATION is returns for an invalid light id.
+ */
+TEST_P(LightsAidl, TestInvalidLightIdUnsupported) {
+    int maxId = INT_MIN;
+    for (const HwLight& light : supportedLights) {
+        maxId = std::max(maxId, light.id);
+    }
+
+    Status status = lights->setLightState(maxId + 1, HwLightState());
+    EXPECT_TRUE(status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION);
+}
+
+INSTANTIATE_TEST_SUITE_P(Lights, LightsAidl,
+                         testing::ValuesIn(android::getAidlHalInstanceNames(ILights::descriptor)),
+                         android::PrintInstanceNameToString);
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    ProcessState::self()->setThreadPoolMaxThreadCount(1);
+    ProcessState::self()->startThreadPool();
+    return RUN_ALL_TESTS();
+}