Introducing NamedEnum to parse enum value as string names.
Add support for parsing enum definition from enum value to string as
per the enum class definition. Including the parsing for enum value zero,
to be able to use enum name parsing for all enum class include value of 0.
Bug: 160010896
Test: atest inputflinger, atest libinput_tests
Change-Id: I717fefd46eddf49cea1ba69429bdd6c856e6bc45
diff --git a/libs/input/tests/NamedEnum_test.cpp b/libs/input/tests/NamedEnum_test.cpp
new file mode 100644
index 0000000..4e93f71
--- /dev/null
+++ b/libs/input/tests/NamedEnum_test.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright 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.
+ */
+
+#include <gtest/gtest.h>
+#include <input/NamedEnum.h>
+
+namespace android {
+
+// Test enum class maximum enum value smaller than default maximum of 8.
+enum class TestEnums { ZERO = 0x0, ONE = 0x1, TWO = 0x2, THREE = 0x3, SEVEN = 0x7 };
+// Big enum contains enum values greater than default maximum of 8.
+enum class TestBigEnums { ZERO = 0x0, FIFTEEN = 0xF };
+
+// Declared to specialize the maximum enum since the enum size exceeds 8 by default.
+template <>
+constexpr size_t NamedEnum::max<TestBigEnums> = 16;
+
+namespace test {
+using android::TestBigEnums;
+using android::TestEnums;
+
+TEST(NamedEnum, RuntimeNamedEnum) {
+ TestEnums e = TestEnums::ZERO;
+ ASSERT_EQ(NamedEnum::enum_name(e), "ZERO");
+
+ e = TestEnums::ONE;
+ ASSERT_EQ(NamedEnum::enum_name(e), "ONE");
+
+ e = TestEnums::THREE;
+ ASSERT_EQ(NamedEnum::enum_name(e), "THREE");
+
+ e = TestEnums::SEVEN;
+ ASSERT_EQ(NamedEnum::enum_name(e), "SEVEN");
+}
+
+// Test big enum
+TEST(NamedEnum, RuntimeBigNamedEnum) {
+ TestBigEnums e = TestBigEnums::ZERO;
+ ASSERT_EQ(NamedEnum::enum_name(e), "ZERO");
+
+ e = TestBigEnums::FIFTEEN;
+ ASSERT_EQ(NamedEnum::enum_name(e), "FIFTEEN");
+}
+
+TEST(NamedEnum, RuntimeNamedEnumAsString) {
+ TestEnums e = TestEnums::ZERO;
+ ASSERT_EQ(NamedEnum::string(e), "ZERO");
+
+ e = TestEnums::ONE;
+ ASSERT_EQ(NamedEnum::string(e), "ONE");
+
+ e = TestEnums::THREE;
+ ASSERT_EQ(NamedEnum::string(e), "THREE");
+
+ e = TestEnums::SEVEN;
+ ASSERT_EQ(NamedEnum::string(e), "SEVEN");
+}
+
+TEST(NamedEnum, RuntimeBigNamedEnumAsString) {
+ TestBigEnums e = TestBigEnums::ZERO;
+ ASSERT_EQ(NamedEnum::string(e), "ZERO");
+
+ e = TestBigEnums::FIFTEEN;
+ ASSERT_EQ(NamedEnum::string(e), "FIFTEEN");
+}
+
+TEST(NamedEnum, RuntimeUnknownNamedEnum) {
+ TestEnums e = static_cast<TestEnums>(0x5);
+ ASSERT_EQ(NamedEnum::enum_name(e), std::nullopt);
+ e = static_cast<TestEnums>(0x9);
+ ASSERT_EQ(NamedEnum::enum_name(e), std::nullopt);
+}
+
+TEST(NamedEnum, RuntimeUnknownNamedEnumAsString) {
+ TestEnums e = static_cast<TestEnums>(0x5);
+ ASSERT_EQ(NamedEnum::string(e), "0x00000005");
+ e = static_cast<TestEnums>(0x9);
+ ASSERT_EQ(NamedEnum::string(e), "0x00000009");
+}
+
+TEST(NamedEnum, CompileTimeFlagName) {
+ static_assert(NamedEnum::enum_name<TestEnums::TWO>() == "TWO");
+ static_assert(NamedEnum::enum_name<TestEnums::THREE>() == "THREE");
+}
+
+} // namespace test
+
+} // namespace android