### Question:
BaseUInt64Value implements UInt64Value<T> { @Override public T multiplyMod(T value, UInt64 modulus) { return multiplyMod(value.toUInt64(), modulus); } protected  BaseUInt64Value(UInt64 value, Function<UInt64, T> ctor); protected  BaseUInt64Value(long value, Function<UInt64, T> ctor); protected  BaseUInt64Value(BigInteger value, Function<UInt64, T> ctor); @Override T add(T value); T add(UInt64 value); @Override T add(long value); @Override T addMod(T value, UInt64 modulus); T addMod(UInt64 value, UInt64 modulus); @Override T addMod(long value, UInt64 modulus); @Override T addMod(long value, long modulus); @Override T subtract(T value); T subtract(UInt64 value); @Override T subtract(long value); @Override T multiply(T value); T multiply(UInt64 value); @Override T multiply(long value); @Override T multiplyMod(T value, UInt64 modulus); T multiplyMod(UInt64 value, UInt64 modulus); @Override T multiplyMod(long value, UInt64 modulus); @Override T multiplyMod(long value, long modulus); @Override T divide(T value); T divide(UInt64 value); @Override T divide(long value); @Override T pow(UInt64 exponent); @Override T pow(long exponent); @Override T mod(UInt64 modulus); @Override T mod(long modulus); @Override int compareTo(T other); int compareTo(UInt64 other); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString(); @Override UInt64 toUInt64(); @Override Bytes toBytes(); @Override Bytes toMinimalBytes();  }### Answer:
@Test void shouldThrowForMultiplyModOfModZero() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(0).multiplyMod(v(1), UInt64.ZERO)); assertEquals("multiplyMod with zero modulus", exception.getMessage()); }
@Test void shouldThrowForMultiplyModUInt64UInt64OfModZero() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(0).multiplyMod(UInt64.valueOf(5), UInt64.ZERO)); assertEquals("multiplyMod with zero modulus", exception.getMessage()); }
@Test void shouldThrowForMultiplyModLongUInt64OfModZero() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(3).multiplyMod(1L, UInt64.ZERO)); assertEquals("multiplyMod with zero modulus", exception.getMessage()); }
@Test void shouldThrowForMultiplyModLongUInt64OfNegative() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(5).multiplyMod(-1, UInt64.valueOf(2))); assertEquals("multiplyMod unsigned by negative", exception.getMessage()); }
@Test void shouldThrowForMultiplyModLongLongOfModZero() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(5).multiplyMod(1, 0)); assertEquals("multiplyMod with zero modulus", exception.getMessage()); }
@Test void shouldThrowForMultiplyModLongLongOfModNegative() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(2).multiplyMod(5, -7)); assertEquals("multiplyMod unsigned with negative modulus", exception.getMessage()); }
@Test void shouldThrowForMultiplyModLongLongOfNegative() { Throwable exception = assertThrows(ArithmeticException.class, () -> v(3).multiplyMod(-1, 2)); assertEquals("multiplyMod unsigned by negative", exception.getMessage()); }