// Copyright 2023 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 "docfx/parse_arguments.h"

#include <gmock/gmock.h>

#include <stdexcept>

namespace docfx {

namespace {

using ::testing::StartsWith;

auto constexpr kExpectedUsageCmd = "Usage: cmd <infile> <library> <version>";

TEST(ParseArguments, Basic) {

auto const actual = ParseArguments({"cmd", "input-file", "library", "4.2"});

EXPECT_EQ(actual.input_filename, "input-file");

EXPECT_EQ(actual.library, "library");

EXPECT_EQ(actual.version, "4.2");

}

TEST(ParseArguments, Help) {

auto const arguments = std::vector<std::string>({"cmd", "--help"});

EXPECT_EXIT(

ParseArguments(arguments), [](int status) { return status == 0; },

// The usage message goes to stdout, the error log should be empty:

"");

}

TEST(ParseArguments, NoCommand) {

EXPECT_THROW(

try { ParseArguments({}); } catch (std::exception const& ex) {

EXPECT_THAT(ex.what(),

StartsWith("Usage: program-name-missing <infile> "));

throw;

},

std::runtime_error);

}

TEST(ParseArguments, NoArguments) {

EXPECT_THROW(

try { ParseArguments({"cmd"}); } catch (std::exception const& ex) {

EXPECT_THAT(ex.what(), StartsWith(kExpectedUsageCmd));

throw;

},

std::runtime_error);

}

TEST(ParseArguments, TooFewArguments) {

EXPECT_THROW(

try { ParseArguments({"cmd", "1"}); } catch (std::exception const& ex) {

EXPECT_THAT(ex.what(), StartsWith(kExpectedUsageCmd));

throw;

},

std::runtime_error);

}

TEST(ParseArguments, TooManyArguments) {

EXPECT_THROW(

try {

ParseArguments({"cmd", "1", "2", "3", "4"});

} catch (std::exception const& ex) {

EXPECT_THAT(ex.what(), StartsWith(kExpectedUsageCmd));

throw;

},

std::runtime_error);

}

} // namespace

} // namespace docfx