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namespace QueryKit.UnitTests;
using FluentAssertions;
using QueryKit.WebApiTestProject.Entities.Recipes;
using SharedTestingHelper.Fakes.Recipes;
public class EnumerableFilteringTests()
{
[Fact]
public async Task can_filter_enumerable()
{
// Arrange
var recipeOne = new FakeRecipeBuilder().Build();
var recipeTwo = new FakeRecipeBuilder().Build();
var listOfRecipes = new List<Recipe> { recipeOne, recipeTwo };
var input = $"""{nameof(Recipe.Title)} == "{recipeOne.Title}" """;
// Act
var filteredRecipes = listOfRecipes.ApplyQueryKitFilter(input).ToList();
// Assert
filteredRecipes.Count.Should().Be(1);
filteredRecipes[0].Id.Should().Be(recipeOne.Id);
}
[Fact]
public void case_insensitive_contains_handles_null_string_values()
{
// Arrange - This test reproduces the bug reported:
// @=* operator on nullable string throws when value is null
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email @=* "gmail" """;
// Act & Assert - should not throw and should return only Bob
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(1);
result[0].Name.Should().Be("Bob");
}
[Fact]
public void case_insensitive_equals_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "BOB@GMAIL.COM" }
};
var filter = """Email ==* "bob@gmail.com" """;
// Act & Assert - should not throw and should return Bob and Carol
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(2);
result.Should().Contain(p => p.Name == "Bob");
result.Should().Contain(p => p.Name == "Carol");
}
[Fact]
public void case_insensitive_starts_with_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email _=* "bob" """;
// Act & Assert
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(1);
result[0].Name.Should().Be("Bob");
}
[Fact]
public void case_insensitive_ends_with_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email _-=* "gmail.com" """;
// Act & Assert
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(1);
result[0].Name.Should().Be("Bob");
}
[Fact]
public void case_insensitive_not_contains_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email !@=* "gmail" """;
// Act & Assert - should return Alice (null) and Carol (yahoo)
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(2);
result.Should().Contain(p => p.Name == "Alice");
result.Should().Contain(p => p.Name == "Carol");
}
[Fact]
public void case_insensitive_not_equals_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email !=* "bob@gmail.com" """;
// Act & Assert - should return Alice (null != value) and Carol
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(2);
result.Should().Contain(p => p.Name == "Alice");
result.Should().Contain(p => p.Name == "Carol");
}
[Fact]
public void case_insensitive_in_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email ^^* ["bob@gmail.com", "alice@test.com"] """;
// Act & Assert
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(1);
result[0].Name.Should().Be("Bob");
}
[Fact]
public void case_insensitive_not_in_handles_null_string_values()
{
// Arrange
var items = new List<PersonWithNullableEmail>
{
new() { Name = "Alice", Email = null },
new() { Name = "Bob", Email = "bob@gmail.com" },
new() { Name = "Carol", Email = "carol@yahoo.com" }
};
var filter = """Email !^^* ["bob@gmail.com"] """;
// Act & Assert - should return Alice (null) and Carol
var result = items.ApplyQueryKitFilter(filter).ToList();
result.Count.Should().Be(2);
result.Should().Contain(p => p.Name == "Alice");
result.Should().Contain(p => p.Name == "Carol");
}
[Fact]
public void quoted_string_literal_matching_a_property_name_is_treated_as_a_literal()
{
// Arrange - reproduces the reported bug: filtering for the literal string "id"
// in the Name property. "id" coincides with the Id property name, so the parser
// wrongly resolved it to a property-to-property comparison and threw.
var items = new List<EntityWithIdAndName>
{
new() { Id = 1, Name = "the id column" },
new() { Id = 2, Name = "something else" }
};
var filter = """Name @=* "id" """;
// Act
var result = items.ApplyQueryKitFilter(filter).ToList();
// Assert
result.Count.Should().Be(1);
result[0].Id.Should().Be(1);
}
[Fact]
public void bare_property_name_on_the_right_is_still_a_property_to_property_comparison()
{
// Arrange - guards the property-to-property feature: an unquoted right-hand side
// that names a property must still compare the two properties.
var items = new List<EntityWithIdAndName>
{
new() { Id = 1, Name = "match", Code = "match" },
new() { Id = 2, Name = "left", Code = "right" }
};
var filter = "Name == Code";
// Act
var result = items.ApplyQueryKitFilter(filter).ToList();
// Assert
result.Count.Should().Be(1);
result[0].Id.Should().Be(1);
}
private class PersonWithNullableEmail
{
public string Name { get; set; } = null!;
public string? Email { get; set; }
}
private class EntityWithIdAndName
{
public int Id { get; set; }
public string Name { get; set; } = null!;
public string Code { get; set; } = null!;
}
}