public void And_WhenShowAllIsApplied_NoItemsAreFiltered()
{
// Arrange
var first = new ExpressionSpec <ItemForTest>();
var second = new ExpressionSpec <ItemForTest>();
var items = new[] { new ItemForTest("11"), new ItemForTest("22") };
var andSpec = first.And(second);
// Act
var result = items.Where(x => andSpec.IsSatisfy(x)).ToArray();
// Assert
result
.Should()
.BeEquivalentTo(items.ToList());
}
public void Or_PassShowAllSpec_NoItemsAreFiltered()
{
// Arrange
var first = new ExpressionSpec <ItemForTest>(x => true);
var second = new ExpressionSpec <ItemForTest>(x => x.Id.Contains("2"));
var items = new[] { new ItemForTest("11"), new ItemForTest("22"), new ItemForTest("33"), };
var orSpec = first.Or(second);
// Act
var result = items.Where(x => orSpec.IsSatisfy(x)).ToArray();
// Assert
result.Should()
.Contain(x => x.Id == "22")
.And.HaveCount(1);
}
public void Not_SpecificationTest()
{
// Arrange
var spec = new ExpressionSpec <ItemForTest>(x => x.Id.Contains("1"));
var items = new[] { new ItemForTest("11"), new ItemForTest("21"), new ItemForTest("22") };
var notSpec = spec.Not();
// Act
var result = items.Where(x => notSpec.IsSatisfy(x)).ToArray();
// Assert
result.Should()
.Contain(x => x.Id == "22")
.And
.HaveCount(1);
}
public void And_WhenSelectorApplicableBetweenMultipleSpecifications_ShouldCorrectlyFilterItems()
{
// Arrange
var first = new ExpressionSpec <ItemForTest>(x => x.Id.Contains("2"));
var second = new ExpressionSpec <SubItemForTest>(x => x != null && x.Active);
var items = new[] { new ItemForTest("11"), new ItemForTest("22"), new ItemForTest("22", new SubItemForTest(true)) };
var andSpec = first.And(second, new SubItemSelector());
// Act
var result = items.Where(x => andSpec.IsSatisfy(x)).ToArray();
// Assert
result
.Should()
.Contain(x => x.Id == "22")
.And
.HaveCount(1);
}
public void And_WhenMultipleSpecificationsAreApplicable_ShouldCorrectlyFilterItems()
{
// Arrange
var first = new ExpressionSpec <ItemForTest>(x => x.Id.Contains("1"));
var second = new ExpressionSpec <ItemForTest>(x => x.Id.Contains("2"));
var items = new[] { new ItemForTest("11"), new ItemForTest("21"), new ItemForTest("22") };
var andSpec = first.And(second);
// Act
var result = items.Where(x => andSpec.IsSatisfy(x)).ToArray();
// Assert
result
.Should()
.Contain(x => x.Id == "21")
.And
.HaveCount(1);
}
