69 lines
2.7 KiB
C#
69 lines
2.7 KiB
C#
// 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.ComponentModel.DataAnnotations
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{
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using System.Data.Entity.Resources;
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using Xunit;
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public class MaxLengthAttributeTests
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{
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[Fact]
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public void Length_returns_set_length()
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{
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Assert.Equal(-1, new MaxLengthAttribute().Length);
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Assert.Equal(-1, new MaxLengthAttribute(-1).Length);
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Assert.Equal(10, new MaxLengthAttribute(10).Length);
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// These only throw when IsValid is called
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Assert.Equal(0, new MaxLengthAttribute(0).Length);
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Assert.Equal(-10, new MaxLengthAttribute(-10).Length);
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}
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[Fact]
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public void IsValid_throws_for_negative_or_zero_lengths_other_than_negative_one()
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{
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var attribute1 = new MaxLengthAttribute(-10);
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Assert.Equal(
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Strings.MaxLengthAttribute_InvalidMaxLength,
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Assert.Throws<InvalidOperationException>(() => attribute1.IsValid("Rincewind")).Message);
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var attribute2 = new MaxLengthAttribute(0);
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Assert.Equal(
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Strings.MaxLengthAttribute_InvalidMaxLength,
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Assert.Throws<InvalidOperationException>(() => attribute2.IsValid("Twoflower")).Message);
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}
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[Fact]
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public void IsValid_throws_for_object_that_is_not_string_or_array()
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{
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Assert.Throws<InvalidCastException>(() => new MaxLengthAttribute().IsValid(new Random()));
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}
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[Fact]
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public void IsValid_returns_true_for_null()
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{
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Assert.True(new MaxLengthAttribute(10).IsValid(null));
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}
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[Fact]
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public void IsValid_validates_string_length()
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{
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Assert.True(new MaxLengthAttribute().IsValid("The Luggage"));
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Assert.True(new MaxLengthAttribute(10).IsValid("Hrun"));
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Assert.True(new MaxLengthAttribute(18).IsValid("Mr. Ronald Saveloy"));
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Assert.True(new MaxLengthAttribute(-1).IsValid("Cohen"));
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Assert.False(new MaxLengthAttribute(5).IsValid("Mad Hamish"));
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}
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[Fact]
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public void IsValid_validates_array_length()
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{
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Assert.True(new MaxLengthAttribute().IsValid(new int[500]));
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Assert.True(new MaxLengthAttribute(10).IsValid(new string[7]));
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Assert.True(new MaxLengthAttribute(10).IsValid(new string[10]));
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Assert.True(new MaxLengthAttribute(-1).IsValid(new object[500]));
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Assert.False(new MaxLengthAttribute(5).IsValid(new byte[6]));
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}
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}
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}
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