public void When_Default_is_called_Then_FirstPageNumber_CurrentPageNumber_and_LastPageNumber_should_be_0()
{
// Act.
var defaultNavigation = PagedEnumerableNavigation.Default();
// Assert.
defaultNavigation.FirstPageNumber.Should().Be(0L);
defaultNavigation.CurrentPageNumber.Should().Be(0L);
defaultNavigation.LastPageNumber.Should().Be(0L);
}
/// <summary>
/// Initializes a new instance of the <see cref="PagedEnumerableMetadata"/> class
/// using the given builder.
/// </summary>
/// <param name="builder">The builder to use.</param>
private PagedEnumerableMetadata(PagedEnumerableMetadataBuilder builder)
{
if (builder is null)
{
throw new System.ArgumentNullException(nameof(builder));
}
this.Count = builder.Count ?? PagedEnumerableCount.Default();
this.Navigation = builder.Navigation ?? PagedEnumerableNavigation.Default();
}
public void When_Default_is_called_Then_Count_and_Navigation_should_equal_respective_Default()
{
// Act.
var defaultMetadata = PagedEnumerableMetadata.Default();
var defaultCount = PagedEnumerableCount.Default();
var defaultNavigation = PagedEnumerableNavigation.Default();
// Assert.
defaultMetadata.Count.Should().BeEquivalentTo(defaultCount);
defaultMetadata.Navigation.Should().BeEquivalentTo(defaultNavigation);
}
public void Given_a_null_builder_When_Create_is_called_Then_an_ArgumentNullException_should_be_thrown()
{
// Arrange.
PagedEnumerableNavigationBuilder builder = null;
// Act.
Action testCode = () => PagedEnumerableNavigation.Create(builder);
// Assert.
testCode.Should()
.Throw <ArgumentNullException>()
.WithMessage("*cannot be null*builder*");
}
public void Given_null_input_When_WithNavigation_is_called_Then_an_ArgumentNullException_will_be_thrown()
{
// Arrange.
PagedEnumerableNavigation input = null;
PagedEnumerableMetadataBuilder builder = PagedEnumerableMetadataBuilder.Create();
// Act.
Action testCode = () => builder.WithNavigation(input);
// Assert.
testCode.Should()
.Throw <ArgumentNullException>()
.WithMessage("*cannot be null* navigation*");
}
public void Given_no_inputs_When_Create_is_called_Then_instance_will_have_Default_members()
{
// Arrange.
var defaultCount = PagedEnumerableCount.Default();
var defaultNavigation = PagedEnumerableNavigation.Default();
PagedEnumerableMetadata metadata;
// Act.
metadata = PagedEnumerableMetadataBuilder.Create()
.Build();
// Assert.
metadata.Count.Should().BeEquivalentTo(defaultCount);
metadata.Navigation.Should().BeEquivalentTo(defaultNavigation);
}
public void Given_a_builder_with_CurrentPageNumber_greater_than_LastPageNumber_When_Create_is_called_Then_an_ArgumentOutOfRangeException_should_be_thrown()
{
// Arrange.
var builder = PagedEnumerableNavigationBuilder
.Create()
.WithFirstPageNumber(0)
.WithCurrentPageNumber(2)
.WithLastPageNumber(1);
// Act.
Action testCode = () => PagedEnumerableNavigation.Create(builder);
// Assert.
testCode.Should()
.Throw <ArgumentOutOfRangeException>()
.WithMessage("*CurrentPageNumber* must be less than *LastPageNumber*");
}
