Test system is an essential and important safeguard equipment in the development,debugging,testing,and acceptance of embedded systems.The integrated development environment of the test system can quickly realize the development of the test system.The development of the domestic autonomous and controllable simulation test system integrated development environment is an important part of the development of China's industrial basic software.The design concept,system architecture and function modules of ETest are introduced.ETest can describe the cross-linking relationship,interface,signal and protocol template,operation monitoring panel and test script of the device under test through ETL,which is a test domain description language.ETest has integrated test system development capability and can support 1 ms real-time response performance.The development and use mode of ETest are studied,and the typical application cases of ETest are given.The test results indicate that ETest has significant advantages in developing semi-physical testing systems for embedded systems,significantly improving development efficiency,and has important strategic significance for establishing a domestically produced and controllable testing system research and development ecosystem.