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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Xunit;
namespace System.Linq.Tests
{
public class QueryableTests
{
[Fact]
public void AsQueryable()
{
var x = ((IEnumerable)(new int[] { })).AsQueryable();
}
[Fact]
public void AsQueryableT()
{
var x = (new int[] { }).AsQueryable();
}
[Fact]
public void Count1()
{
var count = (new int[] { 0 }).AsQueryable().Count();
Assert.Equal(1, count);
}
[Fact]
public void Count2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Count(n => n > 0);
Assert.Equal(2, count);
}
[Fact]
public void Where1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Where(n => n > 1).Count();
Assert.Equal(1, count);
}
[Fact]
public void Where2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Where((n, i) => n > 1 || i == 0).Count();
Assert.Equal(2, count);
}
[Fact]
public void OfType()
{
var count = (new object[] { 0, (long)1, 2 }).AsQueryable().OfType<int>().Count();
Assert.Equal(2, count);
}
[Fact]
public void Cast()
{
var count = (new object[] { 0, 1, 2 }).AsQueryable().Cast<int>().Count();
Assert.Equal(3, count);
}
[Fact]
public void Select1()
{
var count = (new object[] { 0, 1, 2 }).AsQueryable().Select(o => (int)o).Count();
Assert.Equal(3, count);
}
[Fact]
public void Select2()
{
var count = (new object[] { 0, 1, 2 }).AsQueryable().Select((o, i) => (int)o + i).Count();
Assert.Equal(3, count);
}
[Fact]
public void SelectMany1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SelectMany(n => new int[] { n + 4, 5 }).Count();
Assert.Equal(6, count);
}
[Fact]
public void SelectMany2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SelectMany((n, i) => new int[] { 4 + i, 5 + n }).Count();
Assert.Equal(6, count);
}
[Fact]
public void SelectMany3()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SelectMany(n => new long[] { n + 4, 5 }, (n1, n2) => (n1 + n2).ToString()).Count();
Assert.Equal(6, count);
}
[Fact]
public void SelectMany4()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SelectMany((n, i) => new long[] { 4 + i, 5 + n }, (n1, n2) => (n1 + n2).ToString()).Count();
Assert.Equal(6, count);
}
[Fact]
public void Join1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Join(new int[] { 1, 2, 3 }, n1 => n1, n2 => n2, (n1, n2) => n1 + n2).Count();
Assert.Equal(2, count);
}
[Fact]
public void Join2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Join(new int[] { 1, 2, 3 }, n1 => n1, n2 => n2, (n1, n2) => n1 + n2, EqualityComparer<int>.Default).Count();
Assert.Equal(2, count);
}
[Fact]
public void GroupJoin1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().GroupJoin(new int[] { 1, 2, 3 }, n1 => n1, n2 => n2, (n1, n2) => n1).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupJoin2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().GroupJoin(new int[] { 1, 2, 3 }, n1 => n1, n2 => n2, (n1, n2) => n1, EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void OrderBy1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void OrderBy2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n, Comparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void OrderByDescending1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderByDescending(n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void OrderByDescending2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderByDescending(n => n, Comparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void ThenBy1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n).ThenBy(n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void ThenBy2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n).ThenBy(n => n, Comparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void ThenByDescending1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n).ThenByDescending(n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void ThenByDescending2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().OrderBy(n => n).ThenByDescending(n => n, Comparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void Take()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Take(2).Count();
Assert.Equal(2, count);
}
[Fact]
public void TakeWhile1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().TakeWhile(n => n < 2).Count();
Assert.Equal(2, count);
}
[Fact]
public void TakeWhile2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().TakeWhile((n, i) => n + i < 4).Count();
Assert.Equal(2, count);
}
[Fact]
public void Skip()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Skip(1).Count();
Assert.Equal(2, count);
}
[Fact]
public void SkipWhile1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SkipWhile(n => n < 1).Count();
Assert.Equal(2, count);
}
[Fact]
public void SkipWhile2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().SkipWhile((n, i) => n + i < 1).Count();
Assert.Equal(2, count);
}
[Fact]
public void GroupBy1()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy2()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy3()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, n => n).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy4()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, n => n, EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy5()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, n => n, (k, g) => k).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy6()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, (k, g) => k).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy7()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, n => n, (k, g) => k, EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void GroupBy8()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().GroupBy(n => n, (k, g) => k, EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void Distinct1()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().Distinct().Count();
Assert.Equal(3, count);
}
[Fact]
public void Distinct2()
{
var count = (new int[] { 0, 1, 2, 2, 0 }).AsQueryable().Distinct(EqualityComparer<int>.Default).Count();
Assert.Equal(3, count);
}
[Fact]
public void Concat()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Concat((new int[] { 10, 11, 12 }).AsQueryable()).Count();
Assert.Equal(6, count);
}
[Fact]
public void Zip()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Zip((new int[] { 10, 11, 12 }).AsQueryable(), (n1, n2) => n1 + n2).Count();
Assert.Equal(3, count);
}
[Fact]
public void Union1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Union((new int[] { 1, 2, 3 }).AsQueryable()).Count();
Assert.Equal(4, count);
}
[Fact]
public void Union2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Union((new int[] { 1, 2, 3 }).AsQueryable(), EqualityComparer<int>.Default).Count();
Assert.Equal(4, count);
}
[Fact]
public void Intersect1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Intersect((new int[] { 1, 2, 3 }).AsQueryable()).Count();
Assert.Equal(2, count);
}
[Fact]
public void Intersect2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Intersect((new int[] { 1, 2, 3 }).AsQueryable(), EqualityComparer<int>.Default).Count();
Assert.Equal(2, count);
}
[Fact]
public void Except1()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Except((new int[] { 1, 2, 3 }).AsQueryable()).Count();
Assert.Equal(1, count);
}
[Fact]
public void Except2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().Except((new int[] { 1, 2, 3 }).AsQueryable(), EqualityComparer<int>.Default).Count();
Assert.Equal(1, count);
}
[Fact]
public void First1()
{
var val = (new int[] { 1, 2 }).AsQueryable().First();
Assert.Equal(1, val);
}
[Fact]
public void First2()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().First(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void FirstOrDefault1()
{
var val = (new int[] { 1, 2 }).AsQueryable().FirstOrDefault();
Assert.Equal(1, val);
}
[Fact]
public void FirstOrDefault2()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().FirstOrDefault(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void Last1()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().Last();
Assert.Equal(2, val);
}
[Fact]
public void Last2()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().Last(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void LastOrDefault1()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().LastOrDefault();
Assert.Equal(2, val);
}
[Fact]
public void LastOrDefault2()
{
var val = (new int[] { 0, 1, 2 }).AsQueryable().LastOrDefault(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void Single1()
{
var val = (new int[] { 2 }).AsQueryable().Single();
Assert.Equal(2, val);
}
[Fact]
public void Single2()
{
var val = (new int[] { 2 }).AsQueryable().Single(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void SingleOrDefault1()
{
var val = (new int[] { 2 }).AsQueryable().SingleOrDefault();
Assert.Equal(2, val);
}
[Fact]
public void SingleOrDefault2()
{
var val = (new int[] { 2 }).AsQueryable().SingleOrDefault(n => n > 1);
Assert.Equal(2, val);
}
[Fact]
public void ElementAt()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().ElementAt(1);
Assert.Equal(2, val);
}
[Fact]
public void ElementAtOrDefault()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().ElementAtOrDefault(1);
Assert.Equal(2, val);
}
[Fact]
public void DefaultIfEmpty1()
{
var count = (new int[] { }).AsQueryable().DefaultIfEmpty().Count();
Assert.Equal(1, count);
}
[Fact]
public void DefaultIfEmpty2()
{
var count = (new int[] { }).AsQueryable().DefaultIfEmpty(3).Count();
Assert.Equal(1, count);
}
[Fact]
public void Contains1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Contains(1);
Assert.True(val);
}
[Fact]
public void Contains2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Contains(1, EqualityComparer<int>.Default);
Assert.True(val);
}
[Fact]
public void Reverse()
{
var count = (new int[] { 0, 2, 1 }).AsQueryable().Reverse().Count();
Assert.Equal(3, count);
}
[Fact]
public void SequenceEqual1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().SequenceEqual(new int[] { 0, 2, 1 });
Assert.True(val);
}
[Fact]
public void SequenceEqual2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().SequenceEqual(new int[] { 0, 2, 1 }, EqualityComparer<int>.Default);
Assert.True(val);
}
[Fact]
public void Any1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Any();
Assert.True(val);
}
[Fact]
public void Any2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Any(n => n > 1);
Assert.True(val);
}
[Fact]
public void All()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().All(n => n > 1);
Assert.False(val);
}
[Fact]
public void LongCount1()
{
var count = (new int[] { 0 }).AsQueryable().LongCount();
Assert.Equal(1L, count);
}
[Fact]
public void LongCount2()
{
var count = (new int[] { 0, 1, 2 }).AsQueryable().LongCount(n => n > 0);
Assert.Equal(2L, count);
}
[Fact]
public void Min1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Min();
Assert.Equal(0, val);
}
[Fact]
public void Min2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Min(n => n);
Assert.Equal(0, val);
}
[Fact]
public void Max1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Max();
Assert.Equal(2, val);
}
[Fact]
public void Max2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Max(n => n);
Assert.Equal(2, val);
}
[Fact]
public void Sum1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((int)3, val);
}
[Fact]
public void Sum2()
{
var val = (new int?[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((int)3, val);
}
[Fact]
public void Sum3()
{
var val = (new long[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((long)3, val);
}
[Fact]
public void Sum4()
{
var val = (new long?[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((long)3, val);
}
[Fact]
public void Sum5()
{
var val = (new float[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((float)3, val);
}
[Fact]
public void Sum6()
{
var val = (new float?[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((float)3, val);
}
[Fact]
public void Sum7()
{
var val = (new double[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((double)3, val);
}
[Fact]
public void Sum8()
{
var val = (new double?[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((double)3, val);
}
[Fact]
public void Sum9()
{
var val = (new decimal[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((decimal)3, val);
}
[Fact]
public void Sum10()
{
var val = (new decimal?[] { 0, 2, 1 }).AsQueryable().Sum();
Assert.Equal((decimal)3, val);
}
[Fact]
public void Sum11()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((int)3, val);
}
[Fact]
public void Sum12()
{
var val = (new int?[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((int)3, val);
}
[Fact]
public void Sum13()
{
var val = (new long[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((long)3, val);
}
[Fact]
public void Sum14()
{
var val = (new long?[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((long)3, val);
}
[Fact]
public void Sum15()
{
var val = (new float[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((float)3, val);
}
[Fact]
public void Sum16()
{
var val = (new float?[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((float)3, val);
}
[Fact]
public void Sum17()
{
var val = (new double[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((double)3, val);
}
[Fact]
public void Sum18()
{
var val = (new double?[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((double)3, val);
}
[Fact]
public void Sum19()
{
var val = (new decimal[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((decimal)3, val);
}
[Fact]
public void Sum20()
{
var val = (new decimal?[] { 0, 2, 1 }).AsQueryable().Sum(n => n);
Assert.Equal((decimal)3, val);
}
[Fact]
public void Average1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average2()
{
var val = (new int?[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average3()
{
var val = (new long[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average4()
{
var val = (new long?[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average5()
{
var val = (new float[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((float)1, val);
}
[Fact]
public void Average6()
{
var val = (new float?[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((float)1, val);
}
[Fact]
public void Average7()
{
var val = (new double[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average8()
{
var val = (new double?[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((double)1, val);
}
[Fact]
public void Average9()
{
var val = (new decimal[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((decimal)1, val);
}
[Fact]
public void Average10()
{
var val = (new decimal?[] { 0, 2, 1 }).AsQueryable().Average();
Assert.Equal((decimal)1, val);
}
[Fact]
public void Average11()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average12()
{
var val = (new int?[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average13()
{
var val = (new long[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average14()
{
var val = (new long?[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average15()
{
var val = (new float[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((float)1, val);
}
[Fact]
public void Average16()
{
var val = (new float?[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((float)1, val);
}
[Fact]
public void Average17()
{
var val = (new double[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average18()
{
var val = (new double?[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((double)1, val);
}
[Fact]
public void Average19()
{
var val = (new decimal[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((decimal)1, val);
}
[Fact]
public void Average20()
{
var val = (new decimal?[] { 0, 2, 1 }).AsQueryable().Average(n => n);
Assert.Equal((decimal)1, val);
}
[Fact]
public void Aggregate1()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Aggregate((n1, n2) => n1 + n2);
Assert.Equal((int)3, val);
}
[Fact]
public void Aggregate2()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Aggregate("", (n1, n2) => n1 + n2.ToString());
Assert.Equal("021", val);
}
[Fact]
public void Aggregate3()
{
var val = (new int[] { 0, 2, 1 }).AsQueryable().Aggregate(0L, (n1, n2) => n1 + n2, n => n.ToString());
Assert.Equal("3", val);
}
}
}