| // Copyright 2019 Google LLC |
| // |
| // 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 |
| // |
| // https://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 "public/emboss_maybe.h" |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| |
| namespace emboss { |
| namespace support { |
| namespace test { |
| |
| enum class Foo : ::std::int64_t { |
| BAR = 1, |
| BAZ = 2, |
| }; |
| |
| TEST(Maybe, Known) { |
| EXPECT_TRUE(Maybe<int>(10).Known()); |
| EXPECT_EQ(10, Maybe<int>(10).ValueOr(3)); |
| EXPECT_EQ(10, Maybe<int>(10).ValueOrDefault()); |
| EXPECT_EQ(10, Maybe<int>(10).Value()); |
| EXPECT_TRUE(Maybe<bool>(true).Value()); |
| EXPECT_EQ(Foo::BAZ, Maybe<Foo>(Foo::BAZ).ValueOrDefault()); |
| |
| Maybe<int> x = Maybe<int>(1000); |
| Maybe<int> y = Maybe<int>(); |
| y = x; |
| EXPECT_TRUE(y.Known()); |
| EXPECT_EQ(1000, y.Value()); |
| } |
| |
| TEST(Maybe, Unknown) { |
| EXPECT_FALSE(Maybe<int>().Known()); |
| EXPECT_EQ(3, Maybe<int>().ValueOr(3)); |
| EXPECT_EQ(0, Maybe<int>().ValueOrDefault()); |
| EXPECT_FALSE(Maybe<bool>().ValueOrDefault()); |
| EXPECT_DEATH(Maybe<int>().Value(), "Known()"); |
| EXPECT_FALSE(Maybe<bool>().ValueOrDefault()); |
| EXPECT_EQ(static_cast<Foo>(0), Maybe<Foo>().ValueOrDefault()); |
| |
| Maybe<int> x = Maybe<int>(); |
| Maybe<int> y = Maybe<int>(1000); |
| y = x; |
| EXPECT_FALSE(y.Known()); |
| } |
| |
| } // namespace test |
| } // namespace support |
| } // namespace emboss |