PrimitiveArrayInteropTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package com.oracle.truffle.api.interop.java.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

import java.util.List;

import org.junit.Before;
import org.junit.Test;

import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.java.JavaInterop;

public class PrimitiveArrayInteropTest {
    public Object[] stringArr;
    public byte[] byteArr;
    public short[] shortArr;
    public int[] intArr;
    public long[] longArr;
    public float[] floatArr;
    public double[] doubleArr;
    public char[] charArr;
    public boolean[] boolArr;

    public interface ExactMatchInterop {
        List<String> stringArr();

        List<Byte> byteArr();

        List<Short> shortArr();

        List<Integer> intArr();

        List<Long> longArr();

        List<Float> floatArr();

        List<Double> doubleArr();

        List<Character> charArr();

        List<Boolean> boolArr();
    }

    private TruffleObject obj;
    private ExactMatchInterop interop;

    @Before
    public void initObjects() {
        obj = JavaInterop.asTruffleObject(this);
        interop = JavaInterop.asJavaObject(ExactMatchInterop.class, obj);
    }

    @Test
    public void everyThingIsNull() {
        assertNull(interop.stringArr());
        assertNull(interop.byteArr());
        assertNull(interop.shortArr());
        assertNull(interop.intArr());
        assertNull(interop.longArr());
        assertNull(interop.floatArr());
        assertNull(interop.doubleArr());
        assertNull(interop.charArr());
        assertNull(interop.boolArr());
    }

    @Test
    @SuppressWarnings({"unchecked", "rawtypes"})
    public void stringAsList() {
        stringArr = new Object[]{"Hello", "World", "!"};
        List<String> list = interop.stringArr();
        assertEquals("Three elements", 3, list.size());
        assertEquals("Hello", list.get(0));
        assertEquals("World", list.get(1));
        assertEquals("!", list.get(2));

        list.set(1, "there");
        assertEquals("there", stringArr[1]);

        list.set(0, null);
        assertNull("set to null", stringArr[0]);

        List rawList = list;
        try {
            rawList.set(0, 42);
        } catch (ClassCastException ex) {
            // OK
        }
        assertNull("still set to null", stringArr[0]);
    }

    @Test
    public void charOp() {
        charArr = new char[]{'A', 'h', 'o', 'j'};
        assertEquals('j', (char) interop.charArr().get(3));
        interop.charArr().set(3, 'y');

        String s = new String(charArr);
        assertEquals("Ahoy", s);
    }

    @Test
    public void boolOp() {
        boolArr = new boolean[]{true, false};

        interop.boolArr().set(1, !interop.boolArr().get(1));

        assertEquals(boolArr[0], boolArr[1]);
    }

    @Test
    public void byteSum() {
        byteArr = new byte[]{(byte) 1, (byte) 2, (byte) 3};
        assertSum("Sum is OK", 6, interop.byteArr());
    }

    @Test
    public void shortSum() {
        shortArr = new short[]{(short) 1, (short) 2, (short) 3};
        assertSum("Sum is OK", 6, interop.shortArr());
    }

    @Test
    public void intSum() {
        intArr = new int[]{1, 2, 3};
        assertSum("Sum is OK", 6, interop.intArr());
    }

    @Test
    public void longSum() {
        longArr = new long[]{1, 2, 3};
        assertSum("Sum is OK", 6, interop.longArr());
    }

    @Test
    public void floatSum() {
        floatArr = new float[]{1, 2, 3};
        assertSum("Sum is OK", 6, interop.floatArr());
    }

    @Test
    public void doubleSum() {
        doubleArr = new double[]{1, 2, 3};
        assertSum("Sum is OK", 6, interop.doubleArr());
    }

    @Test
    public void writeSomebyteSum() {
        byteArr = new byte[]{(byte) 10, (byte) 2, (byte) 3};
        interop.byteArr().set(0, (byte) 1);
        assertSum("Sum is OK", 6, interop.byteArr());
    }

    @Test
    public void writeSomeshortSum() {
        shortArr = new short[]{(short) 10, (short) 2, (short) 3};
        interop.shortArr().set(0, (short) 1);
        assertSum("Sum is OK", 6, interop.shortArr());
    }

    @Test
    public void writeSomeintSum() {
        intArr = new int[]{10, 2, 3};
        interop.intArr().set(0, 1);
        assertSum("Sum is OK", 6, interop.intArr());
    }

    @Test
    public void writeSomelongSum() {
        longArr = new long[]{10, 2, 3};
        interop.longArr().set(0, (long) 1);
        assertSum("Sum is OK", 6, interop.longArr());
    }

    @Test
    public void writeSomefloatSum() {
        floatArr = new float[]{10, 2, 3};
        interop.floatArr().set(0, (float) 1);
        assertSum("Sum is OK", 6, interop.floatArr());
    }

    @Test
    public void writeSomedoubleSum() {
        doubleArr = new double[]{10, 2, 3};
        interop.doubleArr().set(0, (double) 1);
        assertSum("Sum is OK", 6, interop.doubleArr());
    }

    private static void assertSum(String msg, double expected, List<? extends Number> numbers) {
        double v = 0.0;
        for (Number n : numbers) {
            v += n.doubleValue();
        }
        assertEquals(msg, expected, v, 0.05);
    }
}