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DynamicExpressionParserTests.cs
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using System.Collections.Generic;
using System.Globalization;
using System.Linq.Dynamic.Core.Config;
using System.Linq.Dynamic.Core.CustomTypeProviders;
using System.Linq.Dynamic.Core.Exceptions;
using System.Linq.Dynamic.Core.Tests.Helpers;
using System.Linq.Dynamic.Core.Tests.Helpers.Models;
using System.Linq.Dynamic.Core.Tests.TestHelpers;
using System.Linq.Expressions;
using System.Reflection;
using FluentAssertions;
using Moq;
using NFluent;
using Xunit;
namespace System.Linq.Dynamic.Core.Tests;
public class DynamicExpressionParserTests
{
[DynamicLinqType]
public class Z
{
}
public class Foo
{
public Foo FooValue { get; set; }
public string Zero() => string.Empty;
public string One(int x) => string.Empty;
public string Two(int x, int y) => string.Empty;
}
private class MyClass
{
public List<string> MyStrings { get; set; } = null!;
public List<MyClass> MyClasses { get; set; } = null!;
public int Foo()
{
return 42;
}
public void Bar()
{
Name = nameof(Foo);
}
public string? Name { get; set; }
public string? Description { get; set; }
public MyClass Child { get; set; } = null!;
}
private class MyClassCustomTypeProvider : DefaultDynamicLinqCustomTypeProvider
{
public MyClassCustomTypeProvider() : base(ParsingConfig.Default)
{
}
public override HashSet<Type> GetCustomTypes()
{
var customTypes = base.GetCustomTypes();
customTypes.Add(typeof(MyClass));
return customTypes;
}
}
private class ComplexParseLambda1Result
{
public int? Age;
public int TotalIncome;
public string Name;
}
[DynamicLinqType]
public class ComplexParseLambda3Result
{
public int? Age { get; set; }
public int TotalIncome { get; set; }
}
public class CustomClassWithMethod
{
public int GetAge(int x) => x;
}
[DynamicLinqType]
public class CustomClassWithMethodWithDynamicLinqTypeAttribute
{
public int GetAge(int x) => x;
}
[DynamicLinqType]
public interface ICustomInterfaceWithMethodWithDynamicLinqTypeAttribute
{
int GetAge(int x);
}
public class CustomClassImplementingInterface : ICustomInterfaceWithMethodWithDynamicLinqTypeAttribute
{
public int GetAge(int x) => x;
}
[DynamicLinqType]
public class CustomClassWithStaticMethodWithDynamicLinqTypeAttribute
{
public static int GetAge(int x) => x;
}
public class CustomTextClass
{
public CustomTextClass(string origin)
{
Origin = origin;
}
public string Origin { get; }
public static implicit operator string(CustomTextClass customTextValue)
{
return customTextValue.Origin;
}
public static implicit operator CustomTextClass(string origin)
{
return new CustomTextClass(origin);
}
public override string ToString()
{
return Origin;
}
}
public class CustomClassWithOneWayImplicitConversion
{
public CustomClassWithOneWayImplicitConversion(string origin)
{
Origin = origin;
}
public string Origin { get; }
public static implicit operator CustomClassWithOneWayImplicitConversion(string origin)
{
return new CustomClassWithOneWayImplicitConversion(origin);
}
public override string ToString()
{
return Origin;
}
}
public class CustomClassWithReversedImplicitConversion
{
public CustomClassWithReversedImplicitConversion(string origin)
{
Origin = origin;
}
public string Origin { get; }
public static implicit operator string(CustomClassWithReversedImplicitConversion origin)
{
return origin.ToString();
}
public override string ToString()
{
return Origin;
}
}
public class CustomClassWithValueTypeImplicitConversion
{
public CustomClassWithValueTypeImplicitConversion(int origin)
{
Origin = origin;
}
public int Origin { get; }
public static implicit operator CustomClassWithValueTypeImplicitConversion(int origin)
{
return new CustomClassWithValueTypeImplicitConversion(origin);
}
public override string ToString()
{
return Origin.ToString();
}
}
public class CustomClassWithReversedValueTypeImplicitConversion
{
public CustomClassWithReversedValueTypeImplicitConversion(int origin)
{
Origin = origin;
}
public int Origin { get; }
public static implicit operator int(CustomClassWithReversedValueTypeImplicitConversion origin)
{
return origin.Origin;
}
public override string ToString()
{
return Origin.ToString();
}
}
public class TestImplicitConversionContainer
{
public TestImplicitConversionContainer(
CustomClassWithOneWayImplicitConversion oneWay,
CustomClassWithReversedImplicitConversion reversed,
CustomClassWithValueTypeImplicitConversion valueType,
CustomClassWithReversedValueTypeImplicitConversion reversedValueType)
{
OneWay = oneWay;
Reversed = reversed;
ValueType = valueType;
ReversedValueType = reversedValueType;
}
public CustomClassWithOneWayImplicitConversion OneWay { get; }
public CustomClassWithReversedImplicitConversion Reversed { get; }
public CustomClassWithValueTypeImplicitConversion ValueType { get; }
public CustomClassWithReversedValueTypeImplicitConversion ReversedValueType { get; }
}
public class TextHolder
{
public TextHolder(string name, CustomTextClass note)
{
Name = name;
Note = note;
}
public string Name { get; }
public CustomTextClass Note { get; }
public override string ToString()
{
return Name + " (" + Note + ")";
}
}
internal class TestClass794
{
public byte ByteValue { get; set; }
public byte? NullableByteValue { get; set; }
public int IntValue { get; set; }
public int? NullableIntValue { get; set; }
}
[Theory]
[InlineData("Average")]
[InlineData("Max")]
[InlineData("Min")]
[InlineData("Sum")]
public void DynamicExpressionParser_ParseLambda_Aggregate(string operation)
{
foreach (var propertyInfo in typeof(TestClass794).GetProperties())
{
var expression = $"{operation}({propertyInfo.Name})"; // e.g., "Sum(ByteValue)"
// Act on IEnumerable
DynamicExpressionParser.ParseLambda(itType: typeof(IEnumerable<TestClass794>), resultType: typeof(double?), expression: expression);
// Act on IQueryable
DynamicExpressionParser.ParseLambda(itType: typeof(IQueryable<TestClass794>), resultType: typeof(double?), expression: expression);
}
}
[Fact]
public void DynamicExpressionParser_ParseLambda_UseParameterizedNamesInDynamicQuery_false_String()
{
// Assign
var config = new ParsingConfig
{
UseParameterizedNamesInDynamicQuery = false
};
// Act
var expression = DynamicExpressionParser.ParseLambda<string, bool>(config, true, "s => s == \"x\"");
// Assert
ConstantExpression constantExpression = (ConstantExpression)((BinaryExpression)expression.Body).Right;
var value = constantExpression.Value;
Check.That(value).IsEqualTo("x");
}
[Fact]
public void DynamicExpressionParser_ParseLambda_UseParameterizedNamesInDynamicQuery_false_DateTime()
{
// Assign
var config = new ParsingConfig
{
UseParameterizedNamesInDynamicQuery = false
};
// Act
var expression = DynamicExpressionParser.ParseLambda<Person, bool>(config, true, "D == \"2022-03-02\"");
// Assert
ConstantExpression constantExpression = (ConstantExpression)((BinaryExpression)expression.Body).Right;
var value = constantExpression.Value;
Check.That(value).IsEqualTo(new DateTime(2022, 3, 2));
}
[Fact]
public void DynamicExpressionParser_ParseLambda_UseParameterizedNamesInDynamicQuery_true_Int()
{
// Assign
var config = new ParsingConfig
{
UseParameterizedNamesInDynamicQuery = true
};
// Act
var expression = DynamicExpressionParser.ParseLambda<Person, bool>(config, false, "Id = 42");
var expressionAsString = expression.ToString();
// Assert
expressionAsString.Should().Be("Param_0 => (Param_0.Id == value(System.Linq.Dynamic.Core.Parser.WrappedValue`1[System.Int32]).Value)");
ConstantExpression constantExpression = (ConstantExpression)((MemberExpression)((BinaryExpression)expression.Body).Right).Expression!;
var wrappedObj = constantExpression.Value!;
PropertyInfo propertyInfo = wrappedObj.GetType().GetProperty("Value", BindingFlags.Instance | BindingFlags.Public)!;
var value = propertyInfo.GetValue(wrappedObj);
Check.That(value).IsEqualTo(42);
}
[Fact(Skip = "Issue 645")]
public void DynamicExpressionParser_ParseLambda_UseParameterizedNamesInDynamicQuery_true_DateTime()
{
// Assign
var config = new ParsingConfig
{
UseParameterizedNamesInDynamicQuery = true
};
// Act
var expression = DynamicExpressionParser.ParseLambda<Person, bool>(config, false, "D = \"2022-11-16\"");
var expressionAsString = expression.ToString();
// Assert
expressionAsString.Should().Be("Param_0 => (Param_0.D == value(System.Linq.Dynamic.Core.Parser.WrappedValue`1[System.DateTime]).Value)");
ConstantExpression constantExpression = (ConstantExpression)((MemberExpression)((BinaryExpression)expression.Body).Right).Expression;
var wrappedObj = constantExpression!.Value;
PropertyInfo propertyInfo = wrappedObj!.GetType().GetProperty("Value", BindingFlags.Instance | BindingFlags.Public);
object value = propertyInfo!.GetValue(wrappedObj);
Check.That(value).IsEqualTo(new DateTime(2022, 11, 16));
}
[Theory]
[InlineData("NullableIntValue", "42")]
[InlineData("NullableDoubleValue", "42.23")]
public void DynamicExpressionParser_ParseLambda_UseParameterizedNamesInDynamicQuery_ForNullableProperty_true(string propName, string valueString)
{
// Assign
var culture = CultureInfo.CreateSpecificCulture("en-US");
var config = new ParsingConfig
{
UseParameterizedNamesInDynamicQuery = true,
NumberParseCulture = culture
};
// Act
var expression = DynamicExpressionParser.ParseLambda<SimpleValuesModel, bool>(config, false, $"{propName} = {valueString}");
var expressionAsString = expression.ToString();
// Assert
var queriedProp = typeof(SimpleValuesModel).GetProperty(propName, BindingFlags.Instance | BindingFlags.Public)!;
var queriedPropType = queriedProp.PropertyType;
var queriedPropUnderlyingType = Nullable.GetUnderlyingType(queriedPropType);
expressionAsString.Should().StartWith($"Param_0 => (Param_0.{propName}").And.Contain($"System.Linq.Dynamic.Core.Parser.WrappedValue`1[{queriedPropUnderlyingType}])");
dynamic constantExpression = (ConstantExpression)((MemberExpression)((UnaryExpression)((BinaryExpression)expression.Body).Right).Operand).Expression!;
object wrapperObj = constantExpression.Value;
var propertyInfo = wrapperObj.GetType().GetProperty("Value", BindingFlags.Instance | BindingFlags.Public)!;
var value = propertyInfo.GetValue(wrapperObj);
value.Should().Be(Convert.ChangeType(valueString, Nullable.GetUnderlyingType(queriedPropType) ?? queriedPropType, culture));
}
[Theory]
[InlineData("Where(x => x.SnowflakeId == {0})")]
[InlineData("Where(x => x.SnowflakeId = {0})")]
public void DynamicExpressionParser_ParseLambda_WithStructWithEquality(string query)
{
// Assign
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
// Act
var expectedX = (ulong)long.MaxValue + 3;
query = string.Format(query, expectedX);
var expression = DynamicExpressionParser.ParseLambda(qry.GetType(), null, query);
var del = expression.Compile();
var result = del.DynamicInvoke(qry) as IEnumerable<dynamic>;
var expected = qry.Where(gg => gg.SnowflakeId == new SnowflakeId(expectedX)).ToList();
// Assert
Check.That(result).IsNotNull();
Check.That(result).HasSize(expected.Count);
Check.That(result.ToArray()[0]).Equals(expected[0]);
}
// #626
[Theory]
[InlineData("BooleanVariable1 && Bool2", true)]
[InlineData("BooleanVariable1 || Bool2", true)]
[InlineData("BooleanVariable1 && Bool3", false)]
[InlineData("BooleanVariable1 || Bool3", true)]
[InlineData("BooleanVariable1 && BooleanVariable4", false)]
[InlineData("BooleanVariable1 || BooleanVariable4", true)]
public void DynamicExpressionParser_ParseLambda_WithStruct_UsingOperators(string query, bool expectedResult)
{
// Assign
var model = new
{
BooleanVariable1 = new BooleanVariable(true),
Bool2 = true,
Bool3 = false,
BooleanVariable4 = new BooleanVariable(false)
};
// Act
var expr = DynamicExpressionParser.ParseLambda(model.GetType(), null, query);
var compiled = expr.Compile();
var result = compiled.DynamicInvoke(model);
// Assert
result.Should().Be(expectedResult);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_ToList()
{
// Arrange
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
// Act
var query = "OrderBy(gg => gg.Income).ToList()";
var expression = DynamicExpressionParser.ParseLambda(qry.GetType(), null, query);
var del = expression.Compile();
var result = del.DynamicInvoke(qry) as IEnumerable<dynamic>;
var expected = qry.OrderBy(gg => gg.Income).ToList();
// Assert
Check.That(result).IsNotNull();
Check.That(result).HasSize(expected.Count);
Check.That(result.ToArray()[0]).Equals(expected[0]);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_Complex_1()
{
// Arrange
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
var externals = new Dictionary<string, object>
{
{"Users", qry}
};
// Act
var query = "Users.GroupBy(x => new { x.Profile.Age }).OrderBy(gg => gg.Key.Age).Select(j => new (j.Key.Age, j.Sum(k => k.Income) As TotalIncome))";
var expression = DynamicExpressionParser.ParseLambda(null, query, externals);
var del = expression.Compile();
var result = del.DynamicInvoke() as IEnumerable<dynamic>;
var expected = qry.GroupBy(x => new { x.Profile.Age }).OrderBy(gg => gg.Key.Age)
.Select(j => new { j.Key.Age, TotalIncome = j.Sum(k => k.Income) })
.Select(c => new ComplexParseLambda1Result { Age = c.Age, TotalIncome = c.TotalIncome }).Cast<dynamic>()
.ToArray();
// Assert
Check.That(result).IsNotNull();
Check.That(result).HasSize(expected.Length);
Check.That(result.ToArray()[0]).Equals(expected[0]);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_Complex_2()
{
// Arrange
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
// Act
var query = "GroupBy(x => new { x.Profile.Age }, it).OrderBy(gg => gg.Key.Age).Select(j => new (j.Key.Age, j.Sum(k => k.Income) As TotalIncome))";
var expression = DynamicExpressionParser.ParseLambda(qry.GetType(), null, query);
var del = expression.Compile();
var result = del.DynamicInvoke(qry) as IEnumerable<dynamic>;
var expected = qry.GroupBy(x => new { x.Profile.Age }, x => x).OrderBy(gg => gg.Key.Age)
.Select(j => new { j.Key.Age, TotalIncome = j.Sum(k => k.Income) })
.Select(c => new ComplexParseLambda1Result { Age = c.Age, TotalIncome = c.TotalIncome }).Cast<dynamic>()
.ToArray();
// Assert
Check.That(result).IsNotNull();
Check.That(result).HasSize(expected.Length);
Check.That(result.ToArray()[0]).Equals(expected[0]);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_Complex_3()
{
var config = new ParsingConfig
{
CustomTypeProvider = new TestCustomTypeProvider()
};
// Arrange
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
var externals = new Dictionary<string, object>
{
{"Users", qry}
};
// Act
var stringExpression =
"Users.GroupBy(x => new { x.Profile.Age }).OrderBy(gg => gg.Key.Age).Select(j => new System.Linq.Dynamic.Core.Tests.DynamicExpressionParserTests+ComplexParseLambda3Result{j.Key.Age, j.Sum(k => k.Income) As TotalIncome})";
var expression =
DynamicExpressionParser.ParseLambda(config, null, stringExpression, externals);
var del = expression.Compile();
var result = del.DynamicInvoke() as IEnumerable<dynamic>;
var expected = qry.GroupBy(x => new { x.Profile.Age }).OrderBy(gg => gg.Key.Age)
.Select(j => new ComplexParseLambda3Result { Age = j.Key.Age, TotalIncome = j.Sum(k => k.Income) })
.Cast<dynamic>().ToArray();
// Assert
Check.That(result).IsNotNull();
Check.That(result).HasSize(expected.Length);
Check.That(result.ToArray()[0]).Equals(expected[0]);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_Select_1()
{
// Arrange
var testList = User.GenerateSampleModels(51);
var qry = testList.AsQueryable();
var externals = new Dictionary<string, object>
{
{"Users", qry}
};
// Act
var query = "Users.Select(j => new User(j.Income As Income))";
var expression = DynamicExpressionParser.ParseLambda(null, query, externals);
var del = expression.Compile();
var result = del.DynamicInvoke();
// Assert
Assert.NotNull(result);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_Select_2()
{
// Arrange
var testList = User.GenerateSampleModels(5);
var qry = testList.AsQueryable();
var externals = new Dictionary<string, object>
{
{"Users", qry}
};
// Act
var query = "Users.Select(j => j)";
var expression = DynamicExpressionParser.ParseLambda(null, query, externals);
var del = expression.Compile();
var result = del.DynamicInvoke();
// Assert
Assert.NotNull(result);
}
// #801
[Fact]
public void DynamicExpressionParser_ParseLambda_IQueryable()
{
// Assign
var qry = new[]
{
new
{
MessageClassName = "mc"
}
}.AsQueryable();
// Act
var expression = DynamicExpressionParser.ParseLambda(qry.GetType(), null, "it.GroupBy(MessageClassName).Select(it.Key).Where(it != null).Distinct().OrderBy(it).Take(1000)");
// Assert
expression.ToDebugView().Should().Contain(".Call System.Linq.Queryable");
expression.ToDebugView().Should().NotContain(".Call System.Linq.Enumerable");
}
// https://github.com/StefH/System.Linq.Dynamic.Core/issues/58
[Fact]
public void DynamicExpressionParser_ParseLambda_Issue58()
{
// Arrange
var customTypeProvider = new Mock<IDynamicLinqCustomTypeProvider>();
customTypeProvider.Setup(c => c.GetCustomTypes()).Returns([typeof(MyClass)]);
var config = new ParsingConfig
{
CustomTypeProvider = customTypeProvider.Object
};
var expressionParams = new[]
{
Expression.Parameter(typeof(MyClass), "myObj")
};
var myClassInstance = new MyClass();
var invokersMerge = new List<object> { myClassInstance };
// Act
var expression = DynamicExpressionParser.ParseLambda(config, false, expressionParams, null, "myObj.Foo()");
var del = expression.Compile();
var result = del.DynamicInvoke(invokersMerge.ToArray());
// Assert
Check.That(result).Equals(42);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_DuplicateParameterNames_ThrowsException()
{
// Arrange
var parameters = new[]
{
Expression.Parameter(typeof(int), "x"),
Expression.Parameter(typeof(int), "x")
};
// Act and Assert
Check.ThatCode(() => DynamicExpressionParser.ParseLambda(parameters, typeof(bool), "it == 42"))
.Throws<ParseException>()
.WithMessage("The identifier 'x' was defined more than once");
}
[Fact]
public void DynamicExpressionParser_ParseLambda_EmptyParameterList()
{
// Arrange
var pEmpty = new ParameterExpression[] { };
// Act
var @delegate = DynamicExpressionParser.ParseLambda(pEmpty, null, "1+2").Compile();
var result = @delegate.DynamicInvoke() as int?;
// Assert
Check.That(result).Equals(3);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_ParameterName()
{
// Arrange
var parameters = new[]
{
Expression.Parameter(typeof(int), "x")
};
// Assert
var expressionX = DynamicExpressionParser.ParseLambda(parameters, typeof(bool), "x == 42");
var expressionIT = DynamicExpressionParser.ParseLambda(parameters, typeof(bool), "it == 42");
// Assert
Assert.Equal(typeof(bool), expressionX.Body.Type);
Assert.Equal(typeof(bool), expressionIT.Body.Type);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_ParameterName_Empty()
{
// Arrange
var parameters = new[]
{
Expression.Parameter(typeof(int), "")
};
// Assert
var expression = DynamicExpressionParser.ParseLambda(parameters, typeof(bool), "it == 42");
// Assert
Assert.Equal(typeof(bool), expression.Body.Type);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_ParameterName_Null()
{
// Arrange
var parameters = new[]
{
Expression.Parameter(typeof(int), null)
};
// Assert
var expression = DynamicExpressionParser.ParseLambda(parameters, typeof(bool), "it == 42");
// Assert
Assert.Equal(typeof(bool), expression.Body.Type);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_ParameterExpressionMethodCall_ReturnsIntExpression()
{
var expression = DynamicExpressionParser.ParseLambda(true,
[Expression.Parameter(typeof(int), "x")],
typeof(int),
"x + 1");
Assert.Equal(typeof(int), expression.Body.Type);
}
public static IEnumerable<object?[]> Decimals()
{
return
[
["de-DE", "1m", 1f],
["de-DE", "-42,0m", -42m],
["de-DE", "3,215m", 3.215m],
[null, "1m", 1f],
[null, "-42.0m", -42m],
[null, "3.215m", 3.215m]
];
}
[Theory]
[MemberData(nameof(Decimals))]
public void DynamicExpressionParser_ParseLambda_Decimal(string? culture, string expression, decimal expected)
{
// Arrange
var config = new ParsingConfig();
if (culture != null)
{
config.NumberParseCulture = CultureInfo.CreateSpecificCulture(culture);
}
var parameters = new ParameterExpression[0];
// Act
var lambda = DynamicExpressionParser.ParseLambda(config, parameters, typeof(decimal), expression);
var result = lambda.Compile().DynamicInvoke();
// Assert
result.Should().Be(expected);
}
public static IEnumerable<object?[]> Floats()
{
return
[
["de-DE", "1F", 1f],
["de-DE", "1f", 1f],
["de-DE", "-42f", -42d],
["de-DE", "3,215f", 3.215d],
[null, "1F", 1f],
[null, "1f", 1f],
[null, "-42f", -42d],
[null, "3.215f", 3.215d],
];
}
[Theory]
[MemberData(nameof(Floats))]
public void DynamicExpressionParser_ParseLambda_Float(string? culture, string expression, float expected)
{
// Arrange
var config = new ParsingConfig();
if (culture != null)
{
config.NumberParseCulture = CultureInfo.CreateSpecificCulture(culture);
}
var parameters = new ParameterExpression[0];
// Act
var lambda = DynamicExpressionParser.ParseLambda(config, parameters, typeof(float), expression);
var result = lambda.Compile().DynamicInvoke();
// Assert
result.Should().Be(expected);
}
public static IEnumerable<object?[]> Doubles()
{
return
[
["de-DE", "1D", 1d],
["de-DE", "1d", 1d],
["de-DE", "-42d", -42d],
["de-DE", "3,215d", 3.215d],
["de-DE", "1,2345E-4", 0.00012345d],
["de-DE", "1,2345E4", 12345d],
[null, "1D", 1d],
[null, "1d", 1d],
[null, "-42d", -42d],
[null, "3.215d", 3.215d],
[null, "1.2345E-4", 0.00012345d],
[null, "1.2345E4", 12345d]
];
}
[Theory]
[MemberData(nameof(Doubles))]
public void DynamicExpressionParser_ParseLambda_Double(string? culture, string expression, double expected)
{
// Arrange
var config = new ParsingConfig();
if (culture != null)
{
config.NumberParseCulture = CultureInfo.CreateSpecificCulture(culture);
}
var parameters = new ParameterExpression[0];
// Act
var lambda = DynamicExpressionParser.ParseLambda(config, parameters, typeof(double), expression);
var result = lambda.Compile().DynamicInvoke();
// Assert
result.Should().Be(expected);
}
public class EntityDbo
{
public string Name { get; set; } = string.Empty;
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteral_WithADot_As_Arg()
{
// Act
var expression = DynamicExpressionParser.ParseLambda(typeof(EntityDbo), typeof(bool), "Name == @0", "System.Int32");
var del = expression.Compile();
var result = del.DynamicInvoke(new EntityDbo { Name = "System.Int32" });
// Assert
result.Should().Be(true);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteral_WithADot_In_Expression()
{
// Act
var expression = DynamicExpressionParser.ParseLambda(typeof(EntityDbo), typeof(bool), "Name == \"System.Int32\"");
var del = expression.Compile();
var result = del.DynamicInvoke(new EntityDbo { Name = "System.Int32" });
// Assert
result.Should().Be(true);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteral_ReturnsBooleanLambdaExpression()
{
var expression = DynamicExpressionParser.ParseLambda(
[Expression.Parameter(typeof(string), "Property1")], typeof(bool), "Property1 == \"test\"");
Assert.Equal(typeof(bool), expression.Body.Type);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteralEmpty_ReturnsBooleanLambdaExpression()
{
var expression = DynamicExpressionParser.ParseLambda(
[Expression.Parameter(typeof(string), "Property1")], typeof(bool), "Property1 == \"\"");
Assert.Equal(typeof(bool), expression.Body.Type);
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteralEmbeddedQuote_ReturnsBooleanLambdaExpression()
{
// Act
var expression = DynamicExpressionParser.ParseLambda(
[Expression.Parameter(typeof(string), "Property1")],
typeof(bool),
string.Format("Property1 == {0}", "\"test \\\"string\""));
var rightValue = ((BinaryExpression)expression.Body).Right.ToString();
Assert.Equal(typeof(bool), expression.Body.Type);
Assert.Equal("\"test \"string\"", rightValue);
}
/// <summary>
/// @see https://github.com/StefH/System.Linq.Dynamic.Core/issues/294
/// </summary>
[Fact(Skip = "Fails on EntityFramework.DynamicLinq.Tests with 'An unexpected exception occurred while binding a dynamic operation'")]
public void DynamicExpressionParser_ParseLambda_MultipleLambdas()
{
var users = new[]
{
new { name = "Juan", age = 25 },
new { name = "Juan", age = 25 },
new { name = "David", age = 12 },
new { name = "Juan", age = 25 },
new { name = "Juan", age = 4 },
new { name = "Pedro", age = 2 },
new { name = "Juan", age = 25 }
}.ToList();
IQueryable query;
// One lambda
var res1 = "[{\"Key\":{\"name\":\"Juan\"},\"nativeAggregates\":{\"ageSum\":104},\"Grouping\":[{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":4},{\"name\":\"Juan\",\"age\":25}]},{\"Key\":{\"name\":\"David\"},\"nativeAggregates\":{\"ageSum\":12},\"Grouping\":[{\"name\":\"David\",\"age\":12}]},{\"Key\":{\"name\":\"Pedro\"},\"nativeAggregates\":{\"ageSum\":2},\"Grouping\":[{\"name\":\"Pedro\",\"age\":2}]}]";
query = users.AsQueryable();
query = query.GroupBy("new(name as name)", "it");
query = query.Select("new (it.Key as Key, new(it.Sum(x => x.age) as ageSum) as nativeAggregates, it as Grouping)");
Assert.Equal(res1, Newtonsoft.Json.JsonConvert.SerializeObject(query));
// Multiple lambdas
var res2 = "[{\"Key\":{\"name\":\"Juan\"},\"nativeAggregates\":{\"ageSum\":0,\"ageSum2\":104},\"Grouping\":[{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":25},{\"name\":\"Juan\",\"age\":4},{\"name\":\"Juan\",\"age\":25}]},{\"Key\":{\"name\":\"David\"},\"nativeAggregates\":{\"ageSum\":0,\"ageSum2\":12},\"Grouping\":[{\"name\":\"David\",\"age\":12}]},{\"Key\":{\"name\":\"Pedro\"},\"nativeAggregates\":{\"ageSum\":0,\"ageSum2\":2},\"Grouping\":[{\"name\":\"Pedro\",\"age\":2}]}]";
query = users.AsQueryable();
query = query.GroupBy("new(name as name)", "it");
query = query.Select("new (it.Key as Key, new(it.Sum(x => x.age > 25 ? 1 : 0) as ageSum, it.Sum(x => x.age) as ageSum2) as nativeAggregates, it as Grouping)");
Assert.Equal(res2, Newtonsoft.Json.JsonConvert.SerializeObject(query));
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteralStartEmbeddedQuote_ReturnsBooleanLambdaExpression()
{
// Act
var expression = DynamicExpressionParser.ParseLambda(
[Expression.Parameter(typeof(string), "Property1")],
typeof(bool),
string.Format("Property1 == {0}", "\"\\\"test\""));
var rightValue = ((BinaryExpression)expression.Body).Right.ToString();
Assert.Equal(typeof(bool), expression.Body.Type);
Assert.Equal("\"\"test\"", rightValue);
}
[Theory] // #786
[InlineData("Escaped", "\"{\\\"PropertyA\\\":\\\"\\\"}\"")]
[InlineData("Verbatim", @"""{\""PropertyA\"":\""\""}""")]
// [InlineData("Raw", """"{\"PropertyA\":\"\"}"""")] // TODO : does not work ???
public void DynamicExpressionParser_ParseLambda_StringLiteral_EscapedJson(string _, string expression)
{
// Act
var result = DynamicExpressionParser
.ParseLambda(typeof(object), expression)
.Compile()
.DynamicInvoke();
result.Should().Be("{\"PropertyA\":\"\"}");
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteral_MissingClosingQuote()
{
var expectedRightValue = "\"test\\\"";
Assert.Throws<ParseException>(() => DynamicExpressionParser.ParseLambda(
[Expression.Parameter(typeof(string), "Property1")],
typeof(bool),
string.Format("Property1 == {0}", expectedRightValue)));
}
[Fact]
public void DynamicExpressionParser_ParseLambda_StringLiteralEscapedBackslash_ReturnsBooleanLambdaExpression()
{
// Act
var expression = DynamicExpressionParser.ParseLambda(