public class FindSimilarPeopleTests : CommandTest {

        [Fact]
        public async Task FindsPeopleWithTheSameBirthday() {
            //assemble
            var people = new[] {
                new Person { Email = "tammytwofingers@test.com", DateOfBirth = new DateTime(1999, 1, 1), },
                new Person { Email = "timmy-tuna@test.com", DateOfBirth = new DateTime(1999, 1, 1) },
                new Person { Email = "testymctestface@test.com", DateOfBirth = new DateTime(2000, 2, 2) }
            };
            await this.mockSession.InsertAsync(people);

            //act
            var actual = await this.mockMasterbrain.ExecuteAsync(new FindSimilarPeople(people.First()));

            //assert
            Assert.Equal(2, actual.Length);
            Assert.Equal(people.First(), actual.First());
            Assert.False(actual.Contains(people.Last()));
        }

        [Fact]
        public async Task FindsThoseWithSameEmails() {
            var people = new[] {
                new Person { FirstName = "Harry", Email = "testy@test.com" , DateOfBirth = new DateTime(2000, 1, 1) },
                new Person { FirstName = "Barry", Email = "testy@test.com" , DateOfBirth = new DateTime(2000, 2, 2) },
                new Person { FirstName = "Larry", Email = "mlp-larp-king@test.com" , DateOfBirth = new DateTime(2000, 3, 3) }
            };
            await this.mockSession.InsertAsync(people);

            var actual = await this.mockMasterbrain.ExecuteAsync(new FindSimilarPeople(people.First()));

            Assert.Equal(2, actual.Length);
            Assert.Equal(people.First(), actual.First());
            Assert.False(actual.Contains(people.Last()));
        }
}