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Running the following C# code through NUnit yields
Test.ControllerTest.TestSanity: Expected: `<System.DivideByZeroException>` But was: null
So either no DivideByZeroException is thrown, or NUnit does not catch it. Similar to this question, but the answers he got, do not seem to work for me. This is using NUnit 2.5.5.10112, and .NET 4.0.30319.
[Test]
public void TestSanity()
{
Assert.Throws<DivideByZeroException>(new TestDelegate(() => DivideByZero()));
}
private void DivideByZero()
{
// Parse "0" to make sure to get an error at run time, not compile time.
var a = (1 / Double.Parse("0"));
}
Any ideas?
463
using System; public class Example { public static void Main() { int number1 = 3000; int number2 = 0; try { Console. WriteLine(number1 / number2); } catch (DivideByZeroException) { Console. WriteLine("Division of {0} by zero.", number1); } } } // The example displays the following output: // Division of 3000 by zero.
Throws( Is. InstanceOf<ApplicationException>(), code ); // Allow both ApplicationException and any derived type Assert. Catch<ApplicationException>( code ); // Allow any kind of exception Assert. Catch( code );
Any number divided by zero gives the answer “equal to infinity.” Unfortunately, no data structure in the world of programming can store an infinite amount of data. Hence, if any number is divided by zero, we get the arithmetic exception .
ZeroDivisionError: It is raised when the denominator in a division operation is zero.
No exception is thrown. 1 / 0.0 will just give you double.PositiveInfinity. This is what the IEEE 754 standard specifies, which C# (and basically every other system) follows.
If you want an exception in floating point division code, check for zero explicitly, and throw it yourself. If you just want to see what DivideByZeroException will get you, either throw it manually or divide integers by integer zero.
157
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