[Home](./index.md) > [@contract-case/case-definition-dsl](./case-definition-dsl.md) > [interactions](./case-definition-dsl.interactions.md) > [functions](./case-definition-dsl.interactions.functions.md) > [ThrowingFunctionExecutionExample](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.md) ## interactions.functions.ThrowingFunctionExecutionExample interface Interaction descriptor for a function execution that throws an error **Signature:** ```typescript export interface ThrowingFunctionExecutionExample ``` ## Properties

Property	Modifiers	Type	Description
[arguments](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.arguments.md)	`readonly`	AnyMatcherOrData\[\]	An array of expected function arguments (or test equivalence matchers for those arguments)
[errorClassName](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.errorclassname.md)	`readonly`	AnyMatcherOrData	A test equivalence matcher for the class name of this exception
[functionName](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.functionname.md)	`readonly`	string	The name of the function to be executed. Doubles as the handle used by registerFunction.
[invocationName?](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.invocationname.md)	`readonly`	string	_(Optional)_ A name for this specific combination of arguments - must be unique in this contract.
[message?](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.message.md)	`readonly`	AnyMatcherOrData	_(Optional)_ A test equivalence matcher for the message from this exception. In general, it's best to rely on the class of the exception instead of the specific error message
[responseName?](./case-definition-dsl.interactions.functions.throwingfunctionexecutionexample.responsename.md)	`readonly`	string	_(Optional)_ A name for this specific exception, must be unique in this