How to get all configuration parameters of test execution in BeforeAllCallback?

[man85]

The org.junit.jupiter.api.extension.ExtensionContext has a method  getConfigurationParameter(...), but why it hasn't getConfigurationParameters()?

The only way to get configuration parameters I've found is to implement org.junit.platform.launcher.TestExecutionListener

[sbrannen]

The reason is that the ExtensionContext API resides in the junit-jupiter-api artifact which cannot have a direct dependency on ConfigurationParameters, since that resides in the junit-platform-engine artifact.

In other words, we cannot introduce a ConfigurationParameters getConfigurationParameters() method in ExtensionContext.

In addition, we assumed people would not need access to all configuration parameters within a Jupiter extension.

Normally, an extension knows the names of the configuration properties it needs to look up.

Why do you need to access all configuration parameters from a BeforeAllCallback extension?