DivideByZeroException when there are no tests discovered

[marek-safar]

The verbose log contains following exception when there are no tests discovered (probably accidentally)

TpTrace Error: 0 : 70249, 5, 2020/11/03, 14:16:15.282, 1591260085400598, vstest.console.dll, InternalTestLoggerEvents.SendTestRunComplete: Exception occurred while calling handler of type Microsoft.VisualStudio.TestPlatform.Extensions.HtmlLogger.HtmlLogger for TestRunCompleteEventArgs: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.DivideByZeroException: Attempted to divide by zero.
   at Microsoft.VisualStudio.TestPlatform.Extensions.HtmlLogger.HtmlLogger.TestRunCompleteHandler(Object sender, TestRunCompleteEventArgs e)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at System.Delegate.DynamicInvoke(Object[] args)
   at Microsoft.VisualStudio.TestPlatform.Utilities.MulticastDelegateUtilities.SafeInvoke(Delegate delegates, Object sender, EventArgs args, String traceDisplayName)

this points to this line

vstest/src/Microsoft.TestPlatform.Extensions.HtmlLogger/HtmlLogger.cs

Line 285 in aabbb71

PassPercentage = (PassedTests * 100) / TotalTests,

AB#1272732