text: /*
   * Copyright 2017-2018 Uber Technologies, Inc.
   *
   * 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
   *
   *         http://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 <stdlib.h>
  
  #include "algos.h"
  #include "test.h"
  
  SUITE(hexRanges) {
      GeoCoord sf = {0.659966917655, 2 * 3.14159 - 2.1364398519396};
      H3Index sfHex = H3_EXPORT(geoToH3)(&sf, 9);
      H3Index* sfHexPtr = &sfHex;
  
      H3Index k1[] = {0x89283080ddbffff, 0x89283080c37ffff, 0x89283080c27ffff,
                      0x89283080d53ffff, 0x89283080dcfffff, 0x89283080dc3ffff};
      H3Index withPentagon[] = {0x8029fffffffffff, 0x801dfffffffffff};
  
      TEST(identityKRing) {
          int err;
  
          H3Index k0[] = {0};
          err = H3_EXPORT(hexRanges)(sfHexPtr, 1, 0, k0);
  
          t_assert(err == 0, "No error on hexRanges");
          t_assert(k0[0] == sfHex, "generated identity k-ring");
      }
  
      TEST(ring1of1) {
          int err;
          H3Index allKrings[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  
          err = H3_EXPORT(hexRanges)(k1, 6, 1, allKrings);
  
          t_assert(err == 0, "No error on hexRanges");
  
          for (int i = 0; i < 42; i++) {
              t_assert(allKrings[i] != 0, "index is populated");
              if (i % 7 == 0) {
                  int index = i / 7;
                  t_assert(k1[index] == allKrings[i],
                           "The beginning of the segment is the correct hexagon");
              }
          }
      }
  
      TEST(ring2of1) {
          int err;
          H3Index* allKrings2 = calloc(6 * (1 + 6 + 12), sizeof(H3Index));
          err = H3_EXPORT(hexRanges)(k1, 6, 2, allKrings2);
  
          t_assert(err == 0, "No error on hexRanges");
  
          for (int i = 0; i < (6 * (1 + 6 + 12)); i++) {
              t_assert(allKrings2[i] != 0, "index is populated");
  
              if (i % (1 + 6 + 12) == 0) {
                  int index = i / (1 + 6 + 12);
                  t_assert(k1[index] == allKrings2[i],
                           "The beginning of the segment is the correct hexagon");
              }
          }
          free(allKrings2);
      }
  
      TEST(failed) {
          int err;
          H3Index* allKrings = calloc(2 * (1 + 6), sizeof(H3Index));
          err = H3_EXPORT(hexRanges)(withPentagon, 2, 1, allKrings);
  
          t_assert(err != 0, "Expected error on hexRanges");
          free(allKrings);
      }
  }
  