bit-range-test.cpp

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/// @file       test/bit-range-test.cpp
/// @brief      Test-cases for vnix::bit_range.
/// @copyright  2019 Thomas E. Vaughan; all rights reserved.
/// @license    BSD three-clause; see LICENSE.

#include "../vnix/bit-range.hpp"
#include "catch.hpp"

using namespace vnix;


TEST_CASE("Bit can be set.", "[bit]") {
  REQUIRE(bit<uint8_t>(0) == 0x01);
  REQUIRE(bit<uint8_t>(1) == 0x02);
  REQUIRE(bit<uint8_t>(2) == 0x04);
  REQUIRE(bit<uint8_t>(3) == 0x08);
  REQUIRE(bit<uint8_t>(4) == 0x10);
  REQUIRE(bit<uint8_t>(5) == 0x20);
  REQUIRE(bit<uint8_t>(6) == 0x40);
  REQUIRE(bit<uint8_t>(7) == 0x80);
}


TEST_CASE("Bit-range can be set.", "[bit-range]") {
  for (unsigned off1 = 0; off1 < 8; ++off1) {
    for (unsigned off2 = 0; off2 < 8; ++off2) {
      uint8_t truth = 0;
      if (off1 < off2) {
        for (unsigned i = off1; i <= off2; ++i) { truth |= (1 << i); }
      } else {
        for (unsigned i = off2; i <= off1; ++i) { truth |= (1 << i); }
      }
      REQUIRE(bit_range<uint8_t>(off1, off2) == truth);
    }
  }
}