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package com.oracle.truffle.api.test;

import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;

import com.oracle.truffle.api.library.Library;
import com.oracle.truffle.api.library.LibraryFactory;

@RunWith(Parameterized.class)
public abstract class AbstractParametrizedLibraryTest extends AbstractLibraryTest {

    public enum TestRun {
        CACHED,
        UNCACHED,
        DISPATCHED_CACHED,
        DISPATCHED_UNCACHED;

        public boolean isDispatched() {
            return this == DISPATCHED_CACHED || this == DISPATCHED_UNCACHED;
        }

        public boolean isCached() {
            return this == CACHED || this == TestRun.DISPATCHED_CACHED;
        }
    }

    @Parameter // first data value (0) is default
    public /* NOT private */ TestRun run;

    protected final <T extends Library> T createLibrary(Class<T> library, Object receiver) {
        LibraryFactory<T> lib = LibraryFactory.resolve(library);
        switch (run) {
            case CACHED:
                return adoptNode(lib.create(receiver)).get();
            case UNCACHED:
                return lib.getUncached(receiver);
            case DISPATCHED_CACHED:
                return adoptNode(lib.createDispatched(2)).get();
            case DISPATCHED_UNCACHED:
                return lib.getUncached();
        }

        throw new AssertionError();
    }

}