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The test impact analysis (TIA) functionality analyzes the coverage data for the application under test and generates a list of tests that have been affected by changes since the previous build. The list of tests are saved to a .lst file that you can pass as a resource to the SOAtest command line interface. SOAtest will only execute the subset of tests affected identified by TIA in order to validate the changes. The following overview describes the test impact analysis process: 

1. Configuration: Configure the coverage agent (agent.jar) shipped with SOAtest and , attach it to your application under test (AUT).Configure your Test Configuration to AUT, and enable SOAtest to communicate with the agent and configure settings for creating the baseline coverage report..  
2. Collect information about what test cases cover: Run your full test suite with the new configuration to collect information about what test cases cover and generate the baseline coverage report.suite so that the agent can collect data about the tests and the code they cover.
3. Generate a baseline coverage report: Process the data collected by the agent to create a baseline report.  
4. Generate the .lst file containing the tests affected by changes. : When a new version of the application is available, run the TestImpactAnalysis script to process the baseline coverage report. A .lst file containing the tests affected by change will be created.
5. Run the tests affected by change. : Deploy the latest version of the application (.war) to your server and run a job that executes SOAtest using the .lst file as the input to verify the changes.

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Configuration

TIA is intended to be implemented as part of an automated process. Perform the following steps to enable TIA.

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Deploy your application under test. An application packaged in any zip-based file format, including zip, war, jar, and ear, is supported, as is a hierarchical directory structure that contains standalone class files or class files embedded within a zip-based file.   

Attaching the Coverage Agent to the AUT

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You can also check the directory you specified with the runtimeData property (/home/TIA/coverage_storage in the example above). The directory should contain a set of static coverage data files. The files are generated when the agent is started. 

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Creating the Test Configuration

Configure a Test Configuration to report You will need to create a test configuration in SOAtest that reports test execution information to the coverage agent and generate the baseline coverage report. You can configure an existing Test Configuration or create and configure a new one (see Creating a Custom Test Configuration).. The test configuration only needs to be created once.

1. Choose Parasoft> Test Configurations from the SOAtest menu and expand the Builtin category.
2. Right-click Demo Configuration and choose Duplicate. 
3. Specify a new name for the configuration (i.e., TIA_agent) and click the Execution tab.
4. Click the Application Coverage tab
5. Open the Test Configuration and click the Execution> Application Coverage tab.
6. Enable the the Collect application coverage option and specify the host name or IP address where the application under test and coverage agent are hosted and the port number of the agent. The port number should match the value of the jtest.agent.port setting in the agent.properties file (default is  8050). You can click
7. Click Test Connection to verify that SOAtest can communicate with the coverage agent. 
8. (Optional) Under Coverage agent user ID, you can specify a user ID so that coverage results can be associated with a specific user. A user ID should only be specified when application coverage for multiple users is enabled for the coverage agent.
9. Enable the Generate baseline coverage report for test impact analysis option and specify the following:
   - Application binaries location - The location that contains binaries of the application under test. You can specify the path to a folder or a .war, .jar, .zip, or .ear file.
   - Report location - The output directory of the baseline coverage report.
10. the jtest.agent.enableMultiuserCoverage  property is set to true  in the agent.properties file. We recommend specifying agent user IDs when multiple users or automated test runs are configured to access the same instance of the AUT at the same time. This is so that their interactions do not affect the correlation between tests and code covered for other users.
11. If you want test failures reported when the coverage agent connection fails, enable Enable the Report coverage agent connection failures as test failures option for test failures to be reported when the coverage agent connection fails, or when the application binaries location or report location are misconfigured. Otherwise connection problems will be reported to the console, but will not cause the test to fail.
12. Enable the Retrieve coverage data option and specify a directory in which to locally store the runtime coverage data. The data saved to this directory is analyzed to generate the baseline coverage report.
13. Click Apply to save your changes.

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Run your full test suite using the new Test Configuration to collect the data and generate the baseline coverage report.test configuration. If you already have an automated test run, you can modify the existing job to use the new Test Configurationtest configuration, e.g.:

soatestcli.exe -data <your workspace> -resource <your tests> -settingslocalsettings <properties file with SOAtest settings> -config <new test configuration> 

See Testing from the Command Line Interface - soatestcli for details about building test execution commands with SOAtest. You can also manually run tests from the SOAtest GUI.

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Generating Baseline Coverage

SOAtest includes a script for creating

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the baseline coverage report

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. The script analyzes the coverage data collected by the full test run and the WAR file for the AUT to generate the report. Depending on your operating system, you can run either the TestImpactAnalysis.bat (Windows) or TestImpactAnalysis.sh (Linux/macOS) script located in the <INSTALL>/test_impact_analysis directory.  

Generating List of Tests Affected by Change

When the test finishes, run the TestImpactAnalysis.sh or TestImpactAnalysis.bat script using the following syntax to generate the coverage report.

./TestImpactAnalysis.sh -app <PATH TO AUT WAR FILE> -runtimeCoverage <PATH_TO_RUNTIME_COVERAGE> -outputReport <PATH_TO_OUTPUT_REPORT_DIR> -include <SPACE_SEPARATED_PATTERNS> -exclude <SPACE_SEPARATED_PATTERNS>

• The -app  flag specifies the deployable .war. You should specify the same artifact deployed as the AUT for the automated test run (see Package your Application).
• The -runtimeCoverage flag specifies the directory you configured in the test configuration.
• The -outputReport flag is optional and specifies where to output the coverage report.
• The -include flag is optional and specifies a space-separated list of patterns to include in the analysis. By default, all test classes are included.  
• The -exclude flag is optional and specifies a space-separated list of patterns to exclude in the analysis. Classes that match patterns specified with the -include flag override excluded patterns.
• Add the -keepRuntimeCoverage option if you want to keep the runtime coverage data files used to generate the baseline coverage XML report. This This parameter does not take a value and is primarily used for debugging purposes. If it is not included in the command, the runtime coverage data files will be removed at the end of the execution.  

Example commands:

TestImpactAnalysis.bat ^
-app C:\tomcat\webapps\application.war ^
-runtimeCoverage C:\TIA\runtime-coverage ^
-outputReport C:\TIA\reports ^
-include com\myapp\data\**,com\myapp\common\** ^
-exclude com\myapp\transport\**,com\myapp\autogen\** 

./TestImpactAnalysis.sh \
-app /home/tomcat/webapps/application.war \
-runtimeCoverage /home/TIA/runtime-coverage \
-outputReport /home/TIA/reports \
-include com/myapp/data/**,com/myapp/common/** \
-exclude com/myapp/transport/**,com/myapp/autogen/** 

When the script finishes, the coverage.xml report will be saved to the location specified with the -outputReport flag. If the flag is not included, the file will be saved to the <USER_HOME>/parasoft/test_impact_analysis/reports/ directory by default.

Generating List of Tests Affected by Change

When a new version of the application is available, run the TestImpactAnalysis.sh or TestImpactAnalysis.bat script When a new version of the application is available, run the TestImpactAnalysis.bat (Windows) or TestImpactAnalysis.sh (Linux/macOS) script located in the <INSTALL_DIR>/test_impact_analysis directory using the following syntax:

TestImpactAnalysis.sh -app <path to new .war> -coverageReport <path to coverage.xml report> -outputLst <path to .lst><PATH_TO_NEW_WAR> -coverageReport <PATH_TO_COVERAGE_XML_REPORT> -outputLst <PATH_TO_LST>

• The -app flag  flag specifies the new deployable .war (see Package your Application).
• The -coverageReport flag  flag should specify the baseline coverage.xml report generated in the directory configured in your Test Configuration with the Report location option (see Configuring the Test Configuration). Generating Baseline Coverage. 
• The -outputLst flag is optional and specifies where to output the results.  

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soatestcli.exe -data <your workspace> -resource <path to .lst> -settingslocalsettings <properties file with SOAtest settings> -config <your team's test configuration> 

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