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package org.scijava.script;

import static org.junit.Assert.fail;

import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;

/**
 * Abstract base class for {@link ScriptLanguage} implementation unit tests.
 *
 * @author Curtis Rueden
 */
public class AbstractScriptLanguageTest {

	/**
	 * Checks that the JSR-223 framework can successfully discover the given
	 * {@link ScriptLanguage} implementation.
	 */
	protected void assertDiscovered(
		final Class<? extends ScriptLanguage> scriptLanguage)
	{
		final ScriptEngineManager manager = new ScriptEngineManager();

		// assert that manager has the script language on its factory list
		boolean match = false;
		for (final ScriptEngineFactory factory : manager.getEngineFactories()) {
			if (scriptLanguage.isInstance(factory)) {
				match = true;
				break;
			}
		}
		if (!match) {
			fail(scriptLanguage.getName() + " not discovered by JSR-223 framework");
		}
	}

}
