Nuclex.Support/Source/EnumHelper.Test.cs

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#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2017 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
#if UNITTEST
using System;
using System.IO;
using NUnit.Framework;
namespace Nuclex.Support {
/// <summary>Unit Test for the enumeration helper class</summary>
[TestFixture]
internal class EnumHelperTest {
#region enum TestEnumeration
/// <summary>An enumeration used for unit testing</summary>
internal enum TestEnumeration {
/// <summary>First arbitrary enumeration value</summary>
One = -2,
/// <summary>Third arbitrary enumeration value</summary>
Three = 33,
/// <summary>Second arbitrary enumeration value</summary>
Two = 23
}
#endregion // enum TestEnumeration
#region enum EmptyEnumeration
internal enum EmptyEnumeration { }
#endregion // enum EmptyEnumeration
/// <summary>
/// Verifies that the enum helper can list the members of an enumeration
/// </summary>
[Test]
public void TestGetValues() {
CollectionAssert.AreEquivalent(
new TestEnumeration[] {
TestEnumeration.One, TestEnumeration.Two, TestEnumeration.Three
},
EnumHelper.GetValues<TestEnumeration>()
);
}
/// <summary>
/// Verifies that the enum helper can locate the highest value in an enumeration
/// </summary>
[Test]
public void TestGetHighestValue() {
Assert.AreEqual(
TestEnumeration.Three, EnumHelper.GetHighestValue<TestEnumeration>()
);
}
/// <summary>
/// Verifies that the enum helper can locate the lowest value in an enumeration
/// </summary>
[Test]
public void TestGetLowestValue() {
Assert.AreEqual(
TestEnumeration.One, EnumHelper.GetLowestValue<TestEnumeration>()
);
}
/// <summary>
/// Tests whether an exception is thrown if the GetValues() method is used on
/// a non-enumeration type
/// </summary>
[Test]
public void TestThrowOnNonEnumType() {
Assert.Throws<ArgumentException>(
delegate() { EnumHelper.GetValues<int>(); }
);
}
/// <summary>
/// Verifies that the default value for an enumeration is returned if
/// the GetLowestValue() method is used on an empty enumeration
/// </summary>
[Test]
public void TestLowestValueInEmptyEnumeration() {
Assert.AreEqual(
default(EmptyEnumeration), EnumHelper.GetLowestValue<EmptyEnumeration>()
);
}
/// <summary>
/// Verifies that the default value for an enumeration is returned if
/// the GetHighestValue() method is used on an empty enumeration
/// </summary>
[Test]
public void TestHighestValueInEmptyEnumeration() {
Assert.AreEqual(
default(EmptyEnumeration), EnumHelper.GetHighestValue<EmptyEnumeration>()
);
}
}
} // namespace Nuclex.Support
#endif // UNITTEST