C# – Why does Assert.IsInstanceOfType(0.GetType(), typeof(int)) fail

c++mstestunit-testing

I'm kind of new to unit testing, using Microsoft.VisualStudio.TestTools.UnitTesting;

The 0.GetType() is actually System.RuntimeType, so what kind of test do I need to write to pass Assert.IsInstanceOfType(0.GetType(), typeof(int))?

— following up, this is my own user error… Assert.IsInstanceOfType(0, typeof(int))

Best Solution

Change the call to the following

Assert.IsInstanceOfType(0, typeof(int));

The first parameter is the object being tested, not the type of the object being tested. by passing 0.GetType(), you were saying is "RunTimeType" an instance of System.int which is false. Under the covers thes call just resolves to

if (typeof(int).IsInstanceOfType(0))

Related Solutions

C# – How to cast int to enum

From an int:

YourEnum foo = (YourEnum)yourInt;

From a string:

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException($"{yourString} is not an underlying value of the YourEnum enumeration.")
}

Update:

From number you can also

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum) , yourInt);

C# “internal” access modifier when doing unit testing

Internal classes need to be tested and there is an assemby attribute:

using System.Runtime.CompilerServices;

[assembly:InternalsVisibleTo("MyTests")]

Add this to the project info file, e.g. Properties\AssemblyInfo.cs.

Best Solution

Related Solutions

C# – How to cast int to enum

C# “internal” access modifier when doing unit testing

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