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System.BadImageFormatException When Running Unit Test

Solved109.78K views4th January 2022BadImageFormatException SLManagedScripting Unit Test
7
Geovanny Galeano [SLC] [DevOps Advocate]725 30th December 2021 0 Comments

Whenever I try running an Unit Test no matter if it was already part of the solution or if I create my own I get this exception when the test includes something with mocking SLProtocol.

Test method Skyline.Protocol.TrapProcessing.Tests.TrapProcessorTests.IsTrapIdImplementedTest threw exception:
System.IO.FileNotFoundException: Could not load file or assembly 'SLManagedScripting, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
at Skyline.Protocol.TrapProcessing.Tests.TrapProcessorTests.IsTrapIdImplementedTest()

The SLManagedScripting dll is part of the solution I've checked, also I've tried pointing to another version which another developer sent me which works for them. This is happening with drivers as soon as I clone them straight from git, if it contains unit test with SLProtocol the test fails.

Some protocols with Unit Test which I ran but got the exception.

Miranda IControl General
Telestream Inspect 2110

After looking online I saw something about changing to X64 or X86 which doing so didn't work and I wasn't able to find anything else.

I' using VS 2017

This is how the solution looks, also there are no errors in the code.

Geovanny Galeano [SLC] [DevOps Advocate] Selected answer as best 4th January 2022

2 Answers

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Pedro Debevere [SLC] [DevOps Enabler]1.80K Posted 4th January 2022 1 Comment

Hi Geovanny,

Could it be that the Default Processor Architecture has been set to X64? (If this is set to X64, it generates the BadImageFormatException you mention.) In Visual Studio 2017, from the menu bar, this can be configured under Test > Test Settings > Default Processor Architecture. If this is set to X64, change it to X86.

Geovanny Galeano [SLC] [DevOps Advocate] Selected answer as best 4th January 2022
Geovanny Galeano [SLC] [DevOps Advocate] commented 4th January 2022

The issue was solved by forcing the target to use x86 instead of Any CPU for the Unit Test Project.

Thanks to Pedro, to do so Right click the unit test project Properties > Build > “Platform target:” set x86

The unit test are now running successfully.

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