cpp-argument-parser/test/argument_test.cpp

//
//  argument_test.cpp
//  program_args-test
//
//  Created by Sam Jaffe on 2/7/21.
//

#include "program_args/arguments.h"

#include "xcode_gtest_helper.h"

using testing::ElementsAre;
using testing::Eq;

template <typename T, size_t N> static T parse(char const * const (&argv)[N]) {
  return T(N, argv);
}

struct ArgumentTest : program::Arguments<ArgumentTest> {
  using program::Arguments<ArgumentTest>::Arguments;

  std::string arg0 = argument(0, "arg0");
};

TEST(ArgumentTest, ThrowsIfMissingArg) {
  EXPECT_THROW(parse<ArgumentTest>({""}), program::IllegalPositionError);
}

TEST(ArgumentTest, ProcessesArgument) {
  auto const options = parse<ArgumentTest>({"", "value"});
  EXPECT_THAT(options.arg0, Eq("value"));
}

TEST(ArgumentTest, HasNoIssueWithOverflowArg) {
  auto const options = parse<ArgumentTest>({"", "value", "extra"});
  EXPECT_THAT(options.arg0, Eq("value"));
  EXPECT_THAT(options.args(), ElementsAre("extra"));
}