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A collection of tests that can certify language implementation to be compliant with most recent requirements of the Truffle infrastructure and tooling.

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/*
 * Copyright (c) 2017, 2018, 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
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
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 * (a) the Software, and
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 * (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),
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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 * This license is subject to the following condition:
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package com.oracle.truffle.tck.impl;

import static org.junit.Assert.assertEquals;

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.Source;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import com.oracle.truffle.tck.impl.TruffleLanguageRunner.RRunner;

/**
 * Tests with code snippets in R language (executed only when an implementation of R is around).
 */
@RunWith(RRunner.class)
public class PolyglotEngineWithR {

    private Context engine;

    @Before
    public void initEngine() {
        engine = Context.newBuilder().build();
    }

    @After
    public void disposeEngine() {
        engine.close();
    }

    @Test
    public void testCallRtFunctionFromJava() {
        callRFunctionFromJava();
    }

    @FunctionalInterface
    interface BinomQuantile {
        int qbinom(double q, int count, double prob);
    }

    public void callRFunctionFromJava() {
        Source src = Source.newBuilder("R", "qbinom", "qbinom.R").buildLiteral();
        BinomQuantile func = engine.eval(src).as(BinomQuantile.class);
        assertEquals(4, func.qbinom(0.37, 10, 0.5));
    }
}