Graph.Tests.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;

namespace GraphAnalyzer.Core.Graph.Tests
{
    class GraphTests
    {
        [Test]
        public void Graph_AddVertex_Added()
        {
            var graph = CreateEmptyGraph();
            graph.AddVertex(new Vertex<string>("V1"));
            graph.AddVertex(new Vertex<string>("V2"));
            Assert.That(() => graph.Vertices, Has.Count.EqualTo(2));
        }

        [Test]
        public void Graph_AddDuplicityVertex_ThrowException()
        {
            var graph = CreateEmptyGraph();
            graph.AddVertex(new Vertex<string>("V1"));
            Assert.That(() => graph.AddVertex(new Vertex<string>("V1")),  Throws.TypeOf<Exception>());
        }

        private Graph<string, int> CreateEmptyGraph()
        {
            return new Graph<string, int>();
        }

        private Graph<string, int> CreateSampleGraph()
        {
            var graph = new Graph<string, int>();

            var v1 = new Vertex<string>("V1");
            var v2 = new Vertex<string>("V2");
            var v3 = new Vertex<string>("V3");
            var v4 = new Vertex<string>("V4");

            graph.AddVertex(v1);
            graph.AddVertex(v2);
            graph.AddVertex(v3);
            graph.AddVertex(v4);

            graph.AddEdge(new Edge<string, int>(v1, v2, 10));
            graph.AddEdge(new Edge<string, int>(v1, v3, 20));
            graph.AddEdge(new Edge<string, int>(v2, v3, 30));
            graph.AddEdge(new Edge<string, int>(v3, v4, 40));

            return graph;
        }
    }
}