glytching / junit-extensions

import org.junit.jupiter.api.extension.ExtensionContext;

public class ExtensionUtil {

  // this is a utility class - hide the public ctor

  private ExtensionUtil() {}

  /**

   * Creates a {@link ExtensionContext.Store} for a given {@code extensionContext}. A {@link

   * ExtensionContext.Store} is bound to an {@link ExtensionContext} so different test invocations

   * do not share the same store. For example a test invocation on {@code ClassA.testMethodA} will

   * have a different {@link ExtensionContext.Store} instance to that associated with a test

   * invocation on {@code ClassA.testMethodB} or test invocation on {@code ClassC.testMethodC}.

   *

   * @param extensionContext the <em>context</em> in which the current test or container is being

   *     executed

   * @return a {@link ExtensionContext.Store} for the given {@code extensionContext}

   */

  public static ExtensionContext.Store getStore(ExtensionContext extensionContext, Class clazz) {

    return extensionContext.getStore(namespace(extensionContext, clazz));

  }

  /**

   * Creates a {@link ExtensionContext.Namespace} in which extension state is stored on creation for

   * post execution destruction. Storing data in a custom namespace prevents accidental cross

   * pollination of data between extensions and between different invocations within the lifecycle

   * of a single extension.

   *

   * @param extensionContext the <em>context</em> in which the current test or container is being

   *     executed

   * @return a {@link ExtensionContext.Namespace} describing the scope for an extension

   */

  private static ExtensionContext.Namespace namespace(

      ExtensionContext extensionContext, Class clazz) {

    return ExtensionContext.Namespace.create(clazz, extensionContext);

  }

}