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File.Exists throws an ArgumentException when empty string paths are used #810
Description
Describe the bug
MockFileSystem throws an System.ArgumentException ("The path is not of a legal form") when a empty string is passed to the File.Exists() method.
System.IO.File.Exists(string.Empty) returns false.
To Reproduce
Steps to reproduce the behavior:
[Test]
public void MockFile_Exists_ShouldReturnFalseForEmptyString()
{
// Arrange
var fileSystem = new MockFileSystem();
// Act
var result = fileSystem.File.Exists(string.Empty);
// Assert
Assert.IsFalse(result);
}
Expected behavior
fileSystem.File.Exists() should return false and behave like System.IO.File.Exists()
Activity
fgreinacher commentedon Feb 10, 2022
Thanks for reporting!
Seems we don't respect https://docs.microsoft.com/en-us/dotnet/api/system.io.file.exists?view=net-6.0#remarks.
PR welcome 😀
github-actions commentedon Feb 17, 2022
This is addressed in release v16.1.11.
fix: make MockFile.Exists handle empty string (TestableIO#811)