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Microsoft.VisualStudio.TestTools.UnitTesting.StringAssert("{","x") throws System.FormatException

See original GitHub issue

Describe the bug

A clear and concise description of what the bug is. Microsoft.VisualStudio.TestTools.UnitTesting.StringAssert("{","x") throws System.FormatException instead of AssertFailedException.

To Reproduce

StringAssert.Contains(":-{","x");

See: https://github.com/nonZero/StringAssert_Demo

Exceptions (if any)

Test method threw exception System.FormatException, but exception Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException was expected. Exc...

Test method threw exception System.FormatException, but exception Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException was expected. Exception message: System.FormatException: Input string was not in a correct format.
   at System.Text.ValueStringBuilder.ThrowFormatError()
   at System.Text.ValueStringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
   at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
   at System.String.Format(IFormatProvider provider, String format, Object[] args)
   at StringAssert_Demo.UnitTest1.Test_StringAssert_DoesNotContain_WithCurly() in .../StringAssert_Demo/StringAssertUnitTest.cs:line 26

Further technical details

.NET SDK (reflecting any global.json):
 Version:   6.0.102
 Commit:    49861cb924

Runtime Environment:
 OS Name:     arch
 OS Version:  
 OS Platform: Linux
 RID:         arch-x64
 Base Path:   /usr/share/dotnet/sdk/6.0.102/

Host (useful for support):
  Version: 6.0.2
  Commit:  839cdfb0ec

.NET SDKs installed:
  6.0.102 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.16 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 5.0.16 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.2 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Issue Analytics

State:
Created a year ago
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

Evangelinkcommented, Jun 9, 2022

Nice catch @KalleOlaviNiemitalo! I will do a follow-up fix.

1reaction

KalleOlaviNiemitalocommented, Jun 9, 2022

That is an incomplete fix; the parameters array might not be empty. Consider StringAssert.Contains("{", "x", "message {0}", "param");.

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