ca_io_expected_test.cc

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/*
                          Aleph_w
 
  Data structures & Algorithms
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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  SOFTWARE.
*/
 
#include <sstream>
#include <string>
 
#include <gtest/gtest.h>
 
#include <ca-io.H>
 
using namespace Aleph;
using namespace Aleph::CA;
 
// --- RLE -------------------------------------------------------------------
 
TEST(CaIoExpected, RleSuccess)
{
  auto r = try_read_rle_string("x = 3, y = 3, rule = B3/S23\nbob$2bo$3o!\n");
  ASSERT_TRUE(r.has_value()) << (r.has_value() ? "" : r.error());
  EXPECT_EQ(r->width, 3u);
  EXPECT_EQ(r->height, 3u);
  EXPECT_EQ(r->alive.size(), 5u);  // glider
}
 
TEST(CaIoExpected, RleErrorCarriesMessage)
{
  auto r = try_read_rle_string("this is not an RLE file @@@");
  ASSERT_FALSE(r.has_value());
  EXPECT_FALSE(r.error().empty());
}
 
TEST(CaIoExpected, RleIstreamOverload)
{
  std::istringstream in("x = 3, y = 1, rule = B3/S23\n3o!\n");
  auto r = try_read_rle(in);
  ASSERT_TRUE(r.has_value()) << (r.has_value() ? "" : r.error());
  EXPECT_EQ(r->alive.size(), 3u);
}
 
TEST(CaIoExpected, RleEmptyInputFails)
{
  auto r = try_read_rle_string("");
  ASSERT_FALSE(r.has_value());
  EXPECT_FALSE(r.error().empty());
}
 
// --- Plaintext -------------------------------------------------------------
 
TEST(CaIoExpected, PlaintextSuccessAndError)
{
  std::istringstream ok("!Blinker\nOOO\n");
  auto a = try_read_plaintext(ok);
  ASSERT_TRUE(a.has_value()) << (a.has_value() ? "" : a.error());
  EXPECT_EQ(a->alive.size(), 3u);
 
  std::istringstream bad("!Comment\nO@O\n");  // '@' is invalid
  auto b = try_read_plaintext(bad);
  ASSERT_FALSE(b.has_value());
  EXPECT_FALSE(b.error().empty());
}
 
// --- Life ------------------------------------------------------------------
 
TEST(CaIoExpected, Life105SuccessAndError)
{
  std::istringstream ok("#Life 1.05\n#P 0 0\n***\n");
  auto a = try_read_life_105(ok);
  ASSERT_TRUE(a.has_value()) << (a.has_value() ? "" : a.error());
  EXPECT_EQ(a->alive.size(), 3u);
 
  std::istringstream bad("garbage without a header\n");
  auto b = try_read_life_105(bad);
  ASSERT_FALSE(b.has_value());
  EXPECT_FALSE(b.error().empty());
}
 
TEST(CaIoExpected, Life106SuccessAndError)
{
  std::istringstream ok("#Life 1.06\n0 0\n1 0\n2 0\n");
  auto a = try_read_life_106(ok);
  ASSERT_TRUE(a.has_value()) << (a.has_value() ? "" : a.error());
  EXPECT_EQ(a->alive.size(), 3u);
 
  std::istringstream bad("#Life 1.06\nnot two integers\n");
  auto b = try_read_life_106(bad);
  ASSERT_FALSE(b.has_value());
  EXPECT_FALSE(b.error().empty());
}
 
TEST(CaIoExpected, LifeEmptyInputFails)
{
  std::istringstream empty105("");
  auto a = try_read_life_105(empty105);
  ASSERT_FALSE(a.has_value());
  EXPECT_FALSE(a.error().empty());
 
  std::istringstream empty106("");
  auto b = try_read_life_106(empty106);
  ASSERT_FALSE(b.has_value());
  EXPECT_FALSE(b.error().empty());
}
 
// --- CSV -------------------------------------------------------------------
 
TEST(CaIoExpected, CsvSuccessAndError)
{
  std::istringstream ok("0,1,0\n0,1,0\n0,1,0\n");
  auto a = try_read_csv_snapshot<int>(ok);
  ASSERT_TRUE(a.has_value()) << (a.has_value() ? "" : a.error());
  EXPECT_EQ(a->height, 3u);
  EXPECT_EQ(a->width, 3u);
 
  std::istringstream ragged("0,1,0\n1,1\n");  // inconsistent width
  auto b = try_read_csv_snapshot<int>(ragged);
  ASSERT_FALSE(b.has_value());
  EXPECT_FALSE(b.error().empty());
}
 
TEST(CaIoExpected, CsvEmptyInputHandled)
{
  std::istringstream empty("");
  auto r = try_read_csv_snapshot<int>(empty);
  ASSERT_TRUE(r.has_value()) << (r.has_value() ? "" : r.error());
  EXPECT_EQ(r->height, 0u);  // empty CSV is valid: 0 rows
}
 
// --- The throwing readers are unchanged ------------------------------------
 
TEST(CaIoExpected, ThrowingReadersStillThrow)
{
  EXPECT_ANY_THROW((void) read_rle_string("not an RLE @@@"));
 
  std::istringstream bad_plaintext("O@O\n");  // '@' invalid
  EXPECT_ANY_THROW((void) read_plaintext(bad_plaintext));
 
  std::istringstream bad_life105("garbage\n");
  EXPECT_ANY_THROW((void) read_life_105(bad_life105));
 
  std::istringstream bad_life106("#Life 1.06\nnot two integers\n");
  EXPECT_ANY_THROW((void) read_life_106(bad_life106));
 
  std::istringstream bad_csv("1,2,3\n1,2\n");  // ragged rows
  EXPECT_ANY_THROW((void) read_csv_snapshot<int>(bad_csv));
}