Reduce function exchangeability test method

The invention relates to the technical field of big data application reliability, and particularly provides a Reduce function exchangeability test method, which comprises the following steps of: firstly, performing standardization operation on a Reduce function, acquiring a control condition of each executable path in the standardized Reduce function through a symbolic execution tool, and generating a first row test record for each executable path according to the control condition; analyzing and classifying attribute marks in the first row of test records, generating new test records by changing values of related general attributes, and performing record filling on the first row of test records to generate an initial test case; the method comprises the steps that initial test cases are obtained, a subsequent test case set is generated according to the initial test cases, a test case set is formed, finally, the Reduce function is tested through the test cases in the test case set, and the exchangeability of t