Done!

README.md

@@ -15,6 +15,19 @@ graph = Graph.load_from_json(path)
 hash_graph = {1 => [2, 3], 2 => [1, 4]}
 graph = Graph.adjacency_list_init(hash_graph)
 
+#==
+# Сравнивает два графа.
+
+#===
+# Сравнивает псевдоним ==.
+
+# eql?
+# Сравнивает по хешу.
+
+# equal?
+# Сравнивает по ссылке. Реализован в object
+
+
 graph.vertices #return list of vertices
 graph.edges #return list of edges
 ```

lib/visual_graphs/graph.rb

@@ -79,5 +79,34 @@ def dump_to_json(path)
       File.open(path, 'w') { |f| f.write(@adjacency_list.to_json) }
     end
 
+    def ==(other_object)
+        if not (self.vertices.sort == other_object.vertices.sort)
+          return false
+        end
+
+        if not (self.edges.sort == other_object.edges.sort)
+          return false
+        end
+        true
+    end
+
+    def ===(other_object)
+      self == other_object
+    end
+
+    def eql?(other_object)
+      if other_object.is_a? self.class
+        if not (self.vertices.sort.eql? other_object.vertices.sort)
+          return false
+        end
+
+        if not (self.edges.sort.eql? other_object.edges.sort)
+          return false
+        end
+        return true
+      end
+      false
+    end
+
   end
 end

test/equality_test.rb

@@ -0,0 +1,44 @@
+require './test/test_helper'
+
+class EqualityTest < Minitest::Test
+  include VisualGraphs
+
+  def test_test
+    hash_graph = {1 => [2], 2 => [4]}
+    graph = Graph.adjacency_list_init(hash_graph)
+
+    hash_graph1 = {1 => [2], 2 => [1]}
+    graph1 = Graph.adjacency_list_init(hash_graph1)
+
+    assert_equal false, graph == graph1
+
+  end
+
+  def test_test_test
+    hash_graph3 = Graph.adjacency_list_init({1 => [2], 2 => [3], 3 => [1]})
+    hash_graph4 = Graph.adjacency_list_init({2 => [3], 3 => [1], 1 => [2]})
+    hash_graph5 = Graph.adjacency_list_init({5 => [3], 7 => [5], 2 => [1]})
+
+    assert_equal true,  hash_graph3 === hash_graph4
+    assert_equal false, hash_graph5 === hash_graph4
+  end
+
+  def test_eql
+    hash_graph6 = Graph.adjacency_list_init({1 => [2], 2 => [3], 3 => [1]})
+    hash_graph7 = Graph.adjacency_list_init({2 => [3], 3 => [1], 1 => [2]})
+    hash_graph8 = Graph.adjacency_list_init({5 => [3], 7 => [5], 2 => [1]})
+
+    assert_equal true,  hash_graph6.eql?(hash_graph7)
+    assert_equal false, hash_graph7.eql?(hash_graph8)
+  end
+
+  def test_equal
+    hash_graph9 =  Graph.adjacency_list_init({1 => [2], 2 => [3], 3 => [1]})
+    hash_graph10 = hash_graph9
+    hash_graph11 = Graph.adjacency_list_init({1 => [2], 2 => [3], 3 => [1]})
+
+    assert_equal true,  hash_graph9.equal?(hash_graph10)
+    assert_equal false, hash_graph9.equal?(hash_graph11)
+  end
+
+end

test/resources/output_graph.json

@@ -0,0 +1 @@
+[[0,2,1],[3,0,5],[6,4,0]]

test/resources/output_test_data.json

@@ -0,0 +1 @@
+{"1":[2],"2":[3],"3":[1]}