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