src/03/graph_test.c


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#include "graph.h"
#include <cgreen/cgreen.h>
#include <string.h>

Ensure(three_equals_three) {
  assert_that(3, is_equal_to(3));
}

Ensure(initialize_returns_a_new_graph) {
  Graph *graph = graph_initialize();

  assert_that(graph, is_not_equal_to(NULL));
  for (int i = 0; i < 128; ++i)
    assert_that(graph->vertices[i], is_equal_to(NULL));
}

Ensure(add_vertex_returns_a_new_vertex) {
  Graph *graph = graph_initialize();
  char label = 'a';
  Vertex *a = graph_add_vertex(graph, label);

  assert_that(a, is_not_equal_to(NULL));
  assert_that(graph->vertices[(int)label], is_equal_to(a));
}

Ensure(add_vertex_adds_max_number_of_verticies_to_graph) {
  Graph *graph = graph_initialize();

  for (int i = 0; i < 128; ++i) {
    Vertex *item = graph_add_vertex(graph, (char)i);
    assert_that(item, is_not_equal_to(NULL));
    assert_that(graph->vertices[i], is_equal_to(item));
  }
}

TestSuite *graph_tests() {
  TestSuite *x = create_test_suite();

  add_test(x, three_equals_three);

  add_test(x, initialize_returns_a_new_graph);

  add_test(x, add_vertex_returns_a_new_vertex);
  add_test(x, add_vertex_adds_max_number_of_verticies_to_graph);

  return x;
}