test/jdk/java/math/BigDecimal/ConstructorUnscaledValue.java

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 */

/*
 * @test
 * @bug 8282252
 * @summary Test constructors of BigDecimal to replace BigInteger subclasses
 */

import java.math.*;

public class ConstructorUnscaledValue {
    public static void main(String... args) {
        TestBigInteger tbi = new TestBigInteger(BigInteger.ONE);
        // Create BigDecimal's using each of the three constructors
        // with guards on the class of unscaledValue
        BigDecimal[] values = {
            new BigDecimal(tbi),
            new BigDecimal(tbi, 2),
            new BigDecimal(tbi, 3, MathContext.DECIMAL32),
        };

        for (var bd : values) {
            BigInteger unscaledValue = bd.unscaledValue();
            if (unscaledValue.getClass() != BigInteger.class) {
                throw new RuntimeException("Bad class for unscaledValue");
            }
            if (!unscaledValue.equals(BigInteger.ONE)) {
                throw new RuntimeException("Bad value for unscaledValue");
            }
        }
    }

    private static class TestBigInteger extends BigInteger {
        public TestBigInteger(BigInteger bi) {
            super(bi.toByteArray());
        }

        @Override
        public String toString() {
            return java.util.Arrays.toString(toByteArray());
        }
    }
}