public void load_posts_by_tag()
{
//// Arrange
var filesystem = Substitute.For<FileSystem>(string.Empty);
filesystem.GetFiles(Arg.Any<string>())
.Returns(info => new[] {GetFileMock("Code, sitecore"), GetFileMock("Sitecore, Test"), GetFileMock("Test, Code")});
var repository = new PostRepository(filesystem);
//// Act
var posts = repository.FindByTag("sitecore").ToList();
//// Assert
posts.Should().HaveCount(2);
foreach (var post in posts)
{
post.Tags.Count.Should().Be(2);
post.Tags.Should().Contain(new Tag("Sitecore"));
}
}