fix(cloudformation-diff): fails on CloudFormation intrinsics in unexpected places #26791
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…ected places The `cloudformation-diff` module was written to parse templates that CDK itself would produce, mostly consisting of concrete values and barely any CloudFormation intrinsics. It would crash when encountering CloudFormation intrinsics in unexpected places (for example, an intrinsic where it expected an array). Make the parsing more robust, checking the types of various values before we try and access it. Property-based tests generate random templates to make sure we didn't forget any edge cases.
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The
cloudformation-diffmodule was written to parse templates that CDK itself would produce, mostly consisting of concrete values and barely any CloudFormation intrinsics. It would crash when encountering CloudFormation intrinsics in unexpected places (for example, an intrinsic where it expected an array).Make the parsing more robust, checking the types of various values before we try and access it. Property-based tests generate random templates to make sure we didn't forget any edge cases.
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fast-checkto the latest version while we're at it.Fixes #7413.
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