public void Given_tags_is_not_null_When_WithTags_is_called_Then_Tags_should_be_set()
{
// Arrange.
IClock clock = ConstantClockStub.Create(0);
BlogPostBuilder builder = BlogPostBuilder.Create(clock);
IImmutableSet <Tag> tags = ImmutableHashSet.Create(Tag.Create("name"));
// Act.
builder = builder.WithTags(tags);
// Assert.
builder.Tags.Should().BeEquivalentTo(tags);
}
public void Given_two_sets_of_tags_When_WithTags_is_called_Then_Tags_should_be_last_set_of_tags()
{
// Arrange.
IClock clock = ConstantClockStub.Create(0);
BlogPostBuilder builder = BlogPostBuilder.Create(clock);
IImmutableSet <Tag> tags = ImmutableHashSet.Create(Tag.Create("name"), Tag.Create("pizza"));
IImmutableSet <Tag> otherTags = ImmutableHashSet.Create(Tag.Create("name"), Tag.Create("age"));
// Act.
builder = builder.WithTags(tags)
.WithTags(otherTags);
// Assert.
builder.Tags.Should().BeEquivalentTo(otherTags);
}
public void Given_tags_is_null_When_WithTags_is_called_Then_an_ArgumentNullException_should_be_thrown()
{
// Arrange.
IClock clock = ConstantClockStub.Create(0);
BlogPostBuilder builder = BlogPostBuilder.Create(clock);
IImmutableSet <Tag> tags = null;
// Act.
Action testCode = () => builder.WithTags(tags);
// Assert.
testCode.Should()
.Throw <ArgumentNullException>()
.WithMessage("*cannot be null*tags*");
}