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// Copyright 2020 The Pigweed Authors
//
// 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 "pw_result/result.h"
#include "gtest/gtest.h"
namespace pw {
namespace {
TEST(Result, CreateOk) {
Result<const char*> res("hello");
EXPECT_TRUE(res.ok());
EXPECT_EQ(res.status(), OkStatus());
EXPECT_EQ(res.value(), "hello");
}
TEST(Result, CreateNotOk) {
Result<int> res(Status::DataLoss());
EXPECT_FALSE(res.ok());
EXPECT_EQ(res.status(), Status::DataLoss());
}
TEST(Result, ValueOr) {
Result<int> good(3);
Result<int> bad(Status::DataLoss());
EXPECT_EQ(good.value_or(42), 3);
EXPECT_EQ(bad.value_or(42), 42);
}
TEST(Result, ConstructType) {
struct Point {
Point(int a, int b) : x(a), y(b) {}
int x;
int y;
};
Result<Point> origin{std::in_place, 0, 0};
ASSERT_TRUE(origin.ok());
ASSERT_EQ(origin.value().x, 0);
ASSERT_EQ(origin.value().y, 0);
}
Result<float> Divide(float a, float b) {
if (b == 0) {
return Status::InvalidArgument();
}
return a / b;
}
TEST(Divide, ReturnOk) {
Result<float> res = Divide(10, 5);
ASSERT_TRUE(res.ok());
EXPECT_EQ(res.value(), 2.0f);
}
TEST(Divide, ReturnNotOk) {
Result<float> res = Divide(10, 0);
EXPECT_FALSE(res.ok());
EXPECT_EQ(res.status(), Status::InvalidArgument());
}
} // namespace
} // namespace pw
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