System and method for regression testing of an application programming interface

A system for regression testing of an application programming interface comprising:

• a usage data collection source configured to:
• track a trace identity associated with at least one message exchange pattern of the application programming interface using an end to end tracing technique;
• and
• capture usage data of an application in one or more modes, wherein the usage data corresponds to the trace identity associated with the at least one message exchange pattern;
• a usage data selection subsystem operatively coupled to the usage data collection source, wherein the usage data selection subsystem is configured to select a predefined strata of usage data from the usage data using a stratified sampling technique;
• a test case generation learning subsystem operatively coupled to the usage data selection subsystem, wherein the test case generation learning subsystem is configured to generate a plurality of test cases by learning selection of the predefined strata of usage data using a learning technique;
• a mocking subsystem operatively coupled to the test case generation learning subsystem, wherein the mocking subsystem is configured to use the trace identity associated with the at least one message exchange pattern of the usage data to simulate the at least one message exchange pattern from a current version of the application against an updated version of the application in a test environment for application testing;
• and
• a comparison subsystem operatively coupled to the test case generation learning subsystem, wherein the comparison subsystem is configured to:
• record an actual result obtained from simulation of the at least one message pattern associated with the usage data in the test environment by enabling one or more mocking services;
• compare the actual result with an expected result obtained from the plurality of test cases based on a predefined set of comparison rules;
• and
• generate a test result for reviewing testing of the application based on at least one difference identified upon comparison of the actual result with the expected result.