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RecordTypesTest.cs
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RecordTypesTest.cs
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using LanguageExt.ClassInstances;
using LanguageExt.Traits;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization;
using Xunit;
namespace LanguageExt.Tests
{
public class TestClass : Record<TestClass>
{
public readonly int X;
public readonly string Y;
public readonly Guid Z;
public TestClass(int x, string y, Guid z)
{
X = x;
Y = y;
Z = z;
}
TestClass(SerializationInfo info, StreamingContext context)
: base(info, context) { }
}
public class TestRecord : Record<TestRecord>
{
public readonly Option<int> Opt1;
public readonly Option<int> Opt2;
public TestRecord(Option<int> opt1, Option<int> opt2)
{
Opt1 = opt1;
Opt2 = opt2;
}
}
public class DerivedTestClass : TestClass
{
public readonly int Extra;
public DerivedTestClass(int x, string y, Guid z, int extra) : base(x, y, z)
{
Extra = extra;
}
}
public class TestClass2 : Record<TestClass2>
{
[NonEq]
public readonly int X;
[NonHash]
public readonly string Y;
[NonShow]
public readonly Guid Z;
public TestClass2(int x, string y, Guid z)
{
X = x;
Y = y;
Z = z;
}
}
public class TestClass3 : Record<TestClass3>
{
public readonly int X;
public readonly string Y;
public readonly Guid Z;
public TestClass W { get; }
public TestClass3(int x, string y, Guid z, TestClass w)
{
X = x;
Y = y;
Z = z;
W = w;
}
TestClass3(SerializationInfo info, StreamingContext context)
: base(info, context) { }
}
public class RecordTypeTests
{
static readonly Guid guid = Guid.Parse("{2ba1ec03-8309-46f6-a93e-5d6aada3a43c}");
[Fact]
public void EqualityOfOriginTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new DerivedTestClass(1, "Hello", Guid.Empty, 1000);
Assert.False(x.Equals(y)); // Different types must not be equal
Assert.False(y.Equals(x)); // Different types must not be equal
}
[Fact]
public void DeepEqualityTestFieldsAndProperties()
{
var x1 = new TestClass(1, "Hello", Guid.Empty);
var x2 = new TestClass(1, "Hello", Guid.Empty);
var y1 = new TestClass3(1, "Hello", Guid.Empty, x1);
var y2 = new TestClass3(1, "Hello", Guid.Empty, x2);
Assert.True(y1 == y2);
}
[Fact]
public void DeepInEqualityTestFieldsAndProperties()
{
var x1 = new TestClass(1, "Hello", Guid.Empty);
var x2 = new TestClass(1, "Hello", guid);
var y1 = new TestClass3(1, "Hello", Guid.Empty, x1);
var y2 = new TestClass3(1, "Hello", Guid.Empty, x2);
Assert.True(y1 != y2);
}
[Fact]
public void SerialisationTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", guid);
var x1 = JsonConvert.SerializeObject(x);
var y1 = JsonConvert.SerializeObject(y);
var x2 = JsonConvert.DeserializeObject<TestClass>(x1);
var y2 = JsonConvert.DeserializeObject<TestClass>(y1);
Assert.True(x == x2);
Assert.True(y == y2);
}
[Fact]
public void ToStringTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", guid);
Assert.True(x.ToString() == "TestClass(1, Hello, 00000000-0000-0000-0000-000000000000)");
Assert.True(y.ToString() == "TestClass(1, Hello, 2ba1ec03-8309-46f6-a93e-5d6aada3a43c)");
}
[Fact]
public void EqualityOperatorTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", Guid.Empty);
Assert.True(x == y);
}
[Fact]
public void EqualityMethodTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", Guid.Empty);
Assert.True(x.Equals(y));
}
[Fact]
public void NullEqualityOperatorTest()
{
TestClass x = new TestClass(1, "Hello", Guid.Empty);
TestClass y = null;
TestClass z = null;
Assert.True(x != y);
Assert.True(y != x);
Assert.True(y == z);
Assert.True(z == y);
}
[Fact]
public void NullEqualityMethodTest()
{
TestClass x = new TestClass(1, "Hello", Guid.Empty);
TestClass y = null;
Assert.False(x.Equals(y));
}
[Fact]
public void InEqualityOperatorTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(2, "Hello", Guid.Empty);
var z = new TestClass(1, "Hello!", Guid.Empty);
var w = new TestClass(1, "Hello", guid);
Assert.True(x != y);
Assert.True(x != z);
Assert.True(x != w);
}
[Fact]
public void InEqualityMethodTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(2, "Hello", Guid.Empty);
var z = new TestClass(1, "Hello!", Guid.Empty);
var w = new TestClass(1, "Hello", guid);
Assert.False(x.Equals(y));
Assert.False(x.Equals(z));
Assert.False(x.Equals(w));
}
[Fact]
public void HashingTest()
{
var a = new TestClass(1, "Hello", Guid.Empty);
var b = new TestClass(1, "Hello", Guid.Empty);
var c = new TestClass(2, "Hello", Guid.Empty);
var d = new TestClass(1, "Hello!", Guid.Empty);
var e = new TestClass(1, "Hello", guid);
Assert.True(a.GetHashCode() == b.GetHashCode());
Assert.True(a.GetHashCode() != c.GetHashCode());
Assert.True(a.GetHashCode() != d.GetHashCode());
Assert.True(a.GetHashCode() != e.GetHashCode());
}
[Fact]
public void OrderingTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", Guid.Empty);
Assert.True(x.CompareTo(y) == 0);
}
[Fact]
public void NullOrderingOperatorTest()
{
TestClass x = new TestClass(1, "Hello", Guid.Empty);
TestClass y = null;
TestClass z = null;
Assert.True(x > y);
Assert.True(x >= y);
Assert.True(y < x);
Assert.True(y <= x);
Assert.True(y == z);
Assert.True(z == y);
}
[Fact]
public void NullOrderingMethodTest()
{
TestClass x = new TestClass(1, "Hello", Guid.Empty);
TestClass y = null;
Assert.True(x.CompareTo(y) > 0);
}
[Fact]
public void OrderingOperatorTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(2, "Hello", Guid.Empty);
var z = new TestClass(1, "Jello", Guid.Empty);
Assert.True(x < y);
Assert.True(x <= y);
Assert.True(y > x);
Assert.True(y >= x);
Assert.True(x < z);
Assert.True(x <= z);
Assert.True(z > x);
Assert.True(z >= x);
}
[Fact]
public void OrderingMethodTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(2, "Hello", Guid.Empty);
var z = new TestClass(1, "Jello", Guid.Empty);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(x, y) < 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(x, y) <= 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(y, x) > 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(y, x) >= 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(x, z) < 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(x, z) <= 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(z, x) > 0);
Assert.True(GenericCompare<OrdRecord<TestClass>, TestClass>(z, x) >= 0);
}
[Fact]
public void EqClassInstanceTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(1, "Hello", Guid.Empty);
var z = new TestClass(2, "Hello", Guid.Empty);
var resA = GenericEquals<EqRecord<TestClass>,TestClass>(x, y);
var resB = GenericEquals<EqRecord<TestClass>,TestClass>(x, z);
Assert.True(resA);
Assert.False(resB);
}
[Fact]
public void OrdClassInstanceTest()
{
var x = new TestClass(1, "Hello", Guid.Empty);
var y = new TestClass(2, "Hello", Guid.Empty);
var z = new TestClass(1, "Jello", Guid.Empty);
Assert.True(x.CompareTo(y) < 0);
Assert.True(x.CompareTo(y) <= 0);
Assert.True(y.CompareTo(x) > 0);
Assert.True(y.CompareTo(x) >= 0);
Assert.True(x.CompareTo(z) < 0);
Assert.True(x.CompareTo(z) <= 0);
Assert.True(z.CompareTo(x) > 0);
Assert.True(z.CompareTo(x) >= 0);
}
public bool GenericEquals<EqA, A>(A x, A y) where EqA : Eq<A> =>
EqA.Equals(x, y);
public int GenericCompare<OrdA, A>(A x, A y) where OrdA : Ord<A> =>
OrdA.Compare(x, y);
[Fact]
public void OptOutOfEqTest()
{
var x = new TestClass2(1, "Hello", Guid.Empty);
var y = new TestClass2(1, "Hello", Guid.Empty);
var z = new TestClass2(2, "Hello", Guid.Empty);
Assert.True(x == y);
Assert.True(x == z);
}
[Fact]
public void OptOutOfHashCodeTest()
{
var x = new TestClass2(1, "Hello", Guid.Empty);
var y = new TestClass2(1, "Hello32543534", Guid.Empty);
var z = new TestClass2(1, "Hello", Guid.Empty);
Assert.True(x.GetHashCode() == y.GetHashCode());
Assert.True(x.GetHashCode() == z.GetHashCode());
}
[Fact]
public void OptOutOfToString()
{
var x = new TestClass2(1, "Hello", Guid.Empty);
var y = new TestClass2(1, "Hello", Guid.NewGuid());
Assert.True(x.ToString() == y.ToString());
}
[Fact]
// https://github.com/louthy/language-ext/issues/560
public void EnsureHashingIsNotOnlyXoring()
{
var testRecord1 = new TestRecord(Option<int>.None, 2);
var testRecord2 = new TestRecord(2, Option<int>.None);
Assert.False(testRecord1.GetHashCode() == testRecord2.GetHashCode());
testRecord1 = new TestRecord(Option<int>.None, Option<int>.None);
testRecord2 = new TestRecord(1, 1);
Assert.False(testRecord1.GetHashCode() == testRecord2.GetHashCode());
}
}
}