public void testRoundInfiniteToBigIntegerAlwaysFails() {
for (RoundingMode mode : ALL_ROUNDING_MODES) {
try {
DoubleMath.roundToBigInteger(Double.POSITIVE_INFINITY, mode);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {
}
try {
DoubleMath.roundToBigInteger(Double.NEGATIVE_INFINITY, mode);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {
}
}
}
public void testRoundFractionalDoubleToBigInteger() {
for (double d : FRACTIONAL_DOUBLE_CANDIDATES) {
for (RoundingMode mode : ALL_SAFE_ROUNDING_MODES) {
BigDecimal expected = new BigDecimal(d).setScale(0, mode);
assertEquals(expected.toBigInteger(), DoubleMath.roundToBigInteger(d, mode));
}
}
}
public void testRoundNaNToBigIntegerAlwaysFails() {
for (RoundingMode mode : ALL_ROUNDING_MODES) {
try {
DoubleMath.roundToBigInteger(Double.NaN, mode);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {
}
}
}
public void testRoundExactFractionalDoubleToBigIntegerFails() {
for (double d : FRACTIONAL_DOUBLE_CANDIDATES) {
try {
DoubleMath.roundToBigInteger(d, UNNECESSARY);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {
}
}
}
public void testRoundExactIntegralDoubleToBigInteger() {
for (double d : INTEGRAL_DOUBLE_CANDIDATES) {
BigDecimal expected = new BigDecimal(d).setScale(0, UNNECESSARY);
assertEquals(expected.toBigInteger(), DoubleMath.roundToBigInteger(d, UNNECESSARY));
}
}
