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Groovy example source code file (JSR223Test.groovy)

This example Groovy source code file (JSR223Test.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

groovy, groovy's, groovytestcase, jsr223foo, object, scriptengine, scriptengine, scriptenginemanager, scriptenginemanager, scriptexception, scriptexception, stringwriter, the, the

The Groovy JSR223Test.groovy source code

/*
 * Copyright 2003-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.jsr223

import javax.script.ScriptEngineManager
import javax.script.ScriptEngine
import javax.script.ScriptEngineFactory
import javax.script.ScriptException

import javax.script.SimpleScriptContext

/**
 * Tests JSR-223 Groovy engine implementation.
 *
 * @author Jim White
 * @author Guillaume Laforge
 */
class JSR223Test extends GroovyTestCase {
    protected ScriptEngineManager manager

    protected void setUp() {
        manager = new ScriptEngineManager()
    }

    void testGetEngineByEngineName() {
        ScriptEngine engine = manager.getEngineByName("groovy")
        assertNotNull(engine)
    }

    void testGetEngineByLanguageName() {
        ScriptEngine engine = manager.getEngineByName("Groovy")
        assertNotNull(engine)
    }

    void testGetEngineByExtension() {
        ScriptEngine engine = manager.getEngineByExtension("groovy")
        assertNotNull(engine)
    }

    void testGetEngineByMIMEType() {
        ScriptEngine engine = manager.getEngineByMimeType("application/x-groovy")
        assertNotNull(engine)
    }

    void testCheckParameters() {
        ScriptEngine engine = manager.getEngineByName("groovy")
        assertNotNull(engine)
        
        ScriptEngineFactory factory = engine.getFactory()
        assertNotNull(factory)

        boolean gotname = false

        Iterator names = factory.getNames().iterator()
        while (names.hasNext()) {
            if (names.next().equals("groovy")) gotname = true
        }
        assertTrue("Short name missing from factory", gotname)

        assertEquals("Groovy", factory.getLanguageName())
        assertNotNull(factory.getEngineVersion())
        assertNotNull(factory.getExtensions())
        assertNotNull(factory.getMimeTypes())

        assertEquals(GroovySystem.getVersion(), factory.getLanguageVersion())
    }

    void testSimpleExpr() throws ScriptException {
        ScriptEngine engine = manager.getEngineByName("groovy")
        assertNotNull(engine)

        assertEquals(Integer.valueOf(3), engine.eval("1 + 2"))
    }

    void testSyntaxError() {
        ScriptEngine engine = manager.getEngineByName("groovy")
        assertNotNull(engine)

        try {
            Object x =  engine.eval("z")
            assertFalse("Didn't get ScriptException for syntax error", true)
        } catch (ScriptException e) {
        }
    }

    void testEmptyScriptWithJustImports() {
        ScriptEngine engine = manager.getEngineByName("groovy")
        assertNotNull(engine)

        // GROOVY-3711: The eval of the following script earlier resulted in NPE
        // as groovy did not generate a script class in this case
        engine.eval("import java.lang.*")
    }

    /**
     * Fix for GROOVY-3669:
     * Can't use several times the same JSR-223 ScriptContext for different groovy script 
     */
    void testGroovy3669() {
        def scriptContext = new SimpleScriptContext()

        def sem = new ScriptEngineManager()

        def engine1 = sem.getEngineByName("groovy")
        def sw1 = new StringWriter()
        scriptContext.writer = sw1
        engine1.eval("print 'one'", scriptContext)

        assert sw1.toString() == 'one', "'one' should have been printed"

        def engine2 = sem.getEngineByName("groovy")
        def sw2 = new StringWriter()
        scriptContext.writer = sw2
        engine2.eval("print 'two'", scriptContext)

        assert sw2.toString() == 'two', "'two' should have been printed instead of '${sw2.toString()}'"
        assert sw1.toString() == 'one', "The output shouldn't have changed and still be 'one' instead of '${sw1.toString()}'"

        assert !scriptContext.getAttribute("out"), "Groovy's 'out' variable should not be left in the script context"
        assert !scriptContext.getAttribute("context"), "The 'context' should not be left in the script context"
    }

    /**
     * Fix for GROOVY-3816
     * Evaluating a class should return the class, and not attempt to run it
     */
    void testGroovy3816() {
        def engine = new ScriptEngineManager().getEngineByName('groovy')

        def clazz = engine.eval('class Jsr223Foo {}')
        assert clazz

        def instance = engine.eval('new Jsr223Foo()')
        assert instance

        assert instance.class.isAssignableFrom(clazz)
    }
}

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