SLFactorialTest.java

/*
 * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.oracle.truffle.sl.test;

import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.vm.PolyglotEngine;
import org.junit.After;
import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;

public class SLFactorialTest {

    private PolyglotEngine engine;
    private PolyglotEngine.Value factorial;

    @Before
    public void initEngine() throws Exception {
        engine = PolyglotEngine.newBuilder().build();
        // @formatter:off
        engine.eval(
            Source.newBuilder("\n" +
                "function fac(n) {\n" +
                "  if (n <= 1) {\n" +
                "    return 1;\n" +
                "  }\n" +
                "  prev = fac(n - 1);\n" +
                "  return prev * n;\n" +
                "}\n").
            name("factorial.sl").
            mimeType("application/x-sl").
            build()
        );
        // @formatter:on
        factorial = engine.findGlobalSymbol("fac");
    }

    @After
    public void dispose() {
        engine.dispose();
    }

    @Test
    public void factorialOf5() throws Exception {
        Number ret = factorial.execute(5).as(Number.class);
        assertEquals(120, ret.intValue());
    }

    @Test
    public void factorialOf3() throws Exception {
        Number ret = factorial.execute(3).as(Number.class);
        assertEquals(6, ret.intValue());
    }

    @Test
    public void factorialOf1() throws Exception {
        Number ret = factorial.execute(1).as(Number.class);
        assertEquals(1, ret.intValue());
    }
}