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package com.oracle.truffle.regex.tregex;

import static org.junit.Assert.assertEquals;

import java.util.PrimitiveIterator;

import org.junit.Test;

import com.oracle.truffle.regex.tregex.string.StringBufferUTF16;
import com.oracle.truffle.regex.tregex.string.StringBufferUTF32;
import com.oracle.truffle.regex.tregex.string.StringBufferUTF8;

public class StringTest {

    @Test
    public void testEncodings() {
        testEncodingsRange(Character.MIN_CODE_POINT, Character.MAX_HIGH_SURROGATE);
        testEncodingsRange(Character.MIN_LOW_SURROGATE, Character.MAX_CODE_POINT);
    }

    static void testEncodingsRange(int lo, int hi) {
        StringBufferUTF8 sb8 = new StringBufferUTF8();
        StringBufferUTF16 sb16 = new StringBufferUTF16();
        StringBufferUTF32 sb32 = new StringBufferUTF32();

        for (int i = lo; i <= hi; i++) {
            sb8.append(i);
            sb16.append(i);
            sb32.append(i);
        }

        PrimitiveIterator.OfInt it8 = sb8.materialize().iterator();
        PrimitiveIterator.OfInt it16 = sb16.materialize().iterator();
        PrimitiveIterator.OfInt it32 = sb32.materialize().iterator();

        for (int i = lo; i <= hi; i++) {
            assertEquals(i, it8.nextInt());
            assertEquals(i, it16.nextInt());
            assertEquals(i, it32.nextInt());
        }
    }
}