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package com.oracle.truffle.sl.test;

import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.vm.PolyglotEngine;
import com.oracle.truffle.sl.SLLanguage;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import org.junit.Test;

public class ParsingCachedTest {

    @Test
    public void stepInStepOver() throws Throwable {
        Source nullSrc = Source.fromText("function main() {}", "yields null").withMimeType("application/x-sl");

        PolyglotEngine engine = PolyglotEngine.newBuilder().build();
        int cnt = SLLanguage.parsingCount();
        Object res = engine.eval(nullSrc).get();
        assertNull("Is null", res);
        assertEquals("One parsing happened", cnt + 1, SLLanguage.parsingCount());

        Object res2 = engine.eval(nullSrc).get();
        assertNull("Still null", res2);
        assertEquals("No more parsing happened", cnt + 1, SLLanguage.parsingCount());
    }

}