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Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

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package org.python.compiler;

import static org.junit.Assert.assertArrayEquals;

/**
 * Some JavaMaker smoke tests
 */

import java.lang.reflect.Array;
import java.util.Properties;

import org.junit.Before;
import org.junit.Test;
import org.python.core.PySystemState;
import org.python.core.RegistryKey;
import org.python.util.PythonInterpreter;


public class JavaMakerSmokeTest {

    public PythonInterpreter interp;
    public Class proxyClass;

    @Before
    public void setUp() throws Exception {
        Properties props = new Properties(System.getProperties());
        props.setProperty(RegistryKey.PYTHON_CACHEDIR_SKIP, "true");
        PySystemState.initialize(props, null);
        interp = new PythonInterpreter();

        String input = new String();
        input += "import java.io.ByteArrayInputStream\n";
        input += "import java.lang.String\n";
        input += "import org.python.core.Options\n";
        input += "org.python.core.Options.proxyDebugDirectory = 'build/testclasses'\n";
        input += "class ProxyTest(java.io.ByteArrayInputStream):\n";
        input += "    def somemethod(self): pass\n";
        input += "ProxyTest(java.lang.String('teststr').getBytes())\n";
        interp.exec(input);

        proxyClass = Class.forName("org.python.proxies.__main__$ProxyTest$0");
    }

    @Test
    public void constructors() throws Exception {
        proxyClass.getConstructor(Array.newInstance(Byte.TYPE, 0).getClass());
        proxyClass.getConstructor(Array.newInstance(Byte.TYPE, 0).getClass(), Integer.TYPE, Integer.TYPE);
    }

    @Test
    public void methods() throws Exception {
        proxyClass.getMethod("classDictInit", org.python.core.PyObject.class);
        proxyClass.getMethod("close");
    }

    @Test
    public void annotations() throws Exception {
        proxyClass.getAnnotation(org.python.compiler.APIVersion.class);
        proxyClass.getAnnotation(org.python.compiler.MTime.class);
    }

    @Test
    public void interfaces() throws Exception {
        Class[] interfaces = new Class[]{org.python.core.PyProxy.class,
                org.python.core.ClassDictInit.class};
        assertArrayEquals(interfaces, proxyClass.getInterfaces());
    }
}