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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.Utilities
{
using System.Linq;
using Xunit;
public class IEnumerableExtensionsTests
{
[Fact]
public void Each_should_iterate_sequence()
{
var i = 0;
new[] { 1, 2, 3 }.Each(_ => i++);
Assert.Equal(3, i);
}
[Fact]
public void Join_should_return_joined_string()
{
Assert.Equal("1, 2, 3", new[] { 1, 2, 3 }.Join());
Assert.Equal("1-2-3", new[] { 1, 2, 3 }.Join(separator: "-"));
Assert.Equal("s, s, s", new[] { 1, 2, 3 }.Join(i => "s"));
Assert.Equal("s, s", new[] { "1", null, "3" }.Join(i => "s"));
}
[Fact]
public void Prepend_adds_item_to_beginning_of_sequence()
{
var result = new[] { 2, 3 }.Prepend(1);
Assert.Equal(3, result.Count());
Assert.Equal(1, result.First());
Assert.Equal(3, result.Last());
}
[Fact]
public void Append_adds_item_to_end_of_sequence()
{
var result = new[] { 1, 2 }.Append(3);
Assert.Equal(3, result.Count());
Assert.Equal(1, result.First());
Assert.Equal(3, result.Last());
}
}
}
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