[Home](./index.md) > [@contract-case/case-definition-dsl](./case-definition-dsl.md) > [interactions](./case-definition-dsl.interactions.md) > [base](./case-definition-dsl.interactions.base.md) > [ContractCaseCoreBehaviour](./case-definition-dsl.interactions.base.contractcasecorebehaviour.md) > [mockType](./case-definition-dsl.interactions.base.contractcasecorebehaviour.mocktype.md) ## interactions.base.ContractCaseCoreBehaviour.mockType property The type of this mock. Usually this is inverted on read vs write, for example, a written MOCK_HTTP_CLIENT might become a MOCK_HTTP_SERVER during reading. This will almost always be the same as the top level type for your mock during read - but if it is different, ContractCase will respect this value. **Signature:** ```typescript readonly mockType: string; ```