// 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.Linq.Expressions;

using Xunit;

namespace System.Linq.Tests

{

public class AllTests : EnumerableBasedTests

{

[Fact]

public void PredicateTrueAllExceptLast()

{

int[] source = { 4, 2, 10, 12, 8, 6, 3 };

Assert.False(source.AsQueryable().All(i => i % 2 == 0));

}

[Fact]

public void NullSource()

{

Assert.Throws<ArgumentNullException>("source", () => ((IQueryable<int>)null).All(i => i != 0));

}

[Fact]

public void NullPredicateUsed()

{

Expression<Func<int, bool>> predicate = null;

Assert.Throws<ArgumentNullException>("predicate", () => Enumerable.Range(0, 3).AsQueryable().All(predicate));

}

[Fact]

public void All()

{

var val = (new int[] { 0, 2, 1 }).AsQueryable().All(n => n > 1);

Assert.False(val);

}

}

}