c# - A.Fake<Stream>().Read(...) throwing InvalidOperationException -

using nunit 2.6.4 & fakeiteasy 1.25.2 unit test c# code in visual studio 2013 community edition

the following test fragment executes expected

[test] public void test_whatisupwithstreamread() {     stream fakestream = a.fake<stream>();      byte[] buffer = new byte[16];      int numbytesread = fakestream.read(buffer, 0, 16);      assert.areequal(0, numbytesread);  } 

however decorate fake callto/returns() or returnslazily() statement...

[test] public void test_whatisupwithstreamread() {     stream fakestream = a.fake<stream>();      a.callto(() => fakestream.read(a<byte[]>.ignored, a<int>.ignored, a<int>.ignored)).returns(1);      byte[] buffer = new byte[16];      int numbytesread = fakestream.read(buffer, 0, 16);      assert.areequal(1, numbytesread);  } 

fakestream.read() throws system.invalidoperationexception message:

"the number of values out , ref parameters specified not match number of out , ref parameters in call."

from within fakeiteasy.configuration.buildablecallrule.applyoutandrefparametersvalueproducer(iinterceptedfakeobjectcall fakeobjectcall), seems pretty odd me stream.read() doesn't have out/ref parameters.

is bug should reporting @ https://github.com/fakeiteasy, or missing something?

thx

update: bug has been fixed in fakeiteasy 1.25.3 , fakeiteasy 2.0.0.

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yes, it's bug, appears have been introduced in 1.23.0. i've created issue 508. i'll work on fix in near future, , discuss other project owners in release want issue fix. head on over if have opinion.

in meantime, 1 possible workaround roll fakeiteasy 1.22.0, if don't require of enhancements , bug fixes have been added in subsequent releases.

if that's not option, perhaps consider abstracting away stream.read , faking abstraction. or come , i'd happy discuss other paths.