public void CreateRelationship_ShouldHave_ZeroValue()
{
//given
IRelationship relationship = this.target.CreateRelationship(new[] { this.left, this.right }, new [] { "friendship" });
//when
//then
Assert.That(relationship.GetRelationshipValue(this.left.Guid, this.right.Guid), Is.EqualTo(0));
}