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package com.oracle.truffle.llvm.tests.bitcode;

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;

import org.graalvm.polyglot.PolyglotException;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import com.oracle.truffle.llvm.tests.options.TestOptions;
import com.oracle.truffle.tck.TruffleRunner;

Tests that big endian data layouts cause an error. Only little endian is supported.
/**
 * Tests that big endian data layouts cause an error. Only little endian is supported.
 */
public class BigEndianTest {

    private static final Path TEST_DIR = new File(TestOptions.LL_TEST_SUITE_PATH, "other").toPath();
    private static final String FILENAME = "O0.bc";

    @ClassRule public static TruffleRunner.RunWithPolyglotRule runWithPolyglot = new TruffleRunner.RunWithPolyglotRule();

    @Rule public ExpectedException exception = ExpectedException.none();

    @Test
    public void testBitEndianDataLayout() throws IOException {
        File file = TEST_DIR.resolve("big_endian.ll.dir").resolve(FILENAME).toFile();
        org.graalvm.polyglot.Source source = org.graalvm.polyglot.Source.newBuilder("llvm", file).build();
        exception.expect(PolyglotException.class);
        exception.expectMessage("Byte order BIG_ENDIAN");
        runWithPolyglot.getPolyglotContext().eval(source);
    }
}