@Test public void addingRatiosShouldWork() { assertThat(new Price(10000).plus(10, PERCENT)).isEqualTo(new Price(11000)); assertThat(new Price(18680).plus(new Ratio(53, PERMILLE))).isEqualTo(new Price(19670)); assertThat(new Price(1).plus(50, PERCENT)).isEqualTo(new Price(2)); assertThat(new Price(1).plus(49, PERCENT)).isEqualTo(new Price(1)); assertThat(new Price(2928).plus(0, PERCENT)).isEqualTo(new Price(2928)); assertThat(new Price(-100).plus(10, PERCENT)).isEqualTo(new Price(-110)); }
public Price plus(final Price other) { return new Price(price + other.price); }
Price implements Comparable<Price> { public Price plus(final Price other) { return new Price(price + other.price); } }
Price implements Comparable<Price> { public Price plus(final Price other) { return new Price(price + other.price); } Price(final double price);  Price(final long price);  Price(final long value, final PriceUnit unit); }
Price implements Comparable<Price> { public Price plus(final Price other) { return new Price(price + other.price); } Price(final double price);  Price(final long price);  Price(final long value, final PriceUnit unit); long asPipette(); double asDouble(); Price plus(final Price other); Price plus(final int amount, final PriceUnit unit); Price plus(final double value, final RatioUnit unit); Price plus(final Ratio ratio); Price minus(final Price other); Price minus(final int amount, final PriceUnit unit); Price minus(final double value, final RatioUnit unit); Price minus(final Ratio ratio); Price inverse(); Price absolute(); Price multiply(final Ratio ratio); Money multiply(final Volume volume, final Currency currency); Ratio divide(final Price divisor); boolean isLessThan(final Price other); boolean isGreaterThan(final Price other); boolean isStrongerThan(final Price other, final MarketDirection direction); boolean isWeakerThan(final Price other, final MarketDirection direction); boolean isBetweenInclusive(final Price a, final Price b); @Override boolean equals(final Object other); @Override int compareTo(final Price other); @Override int hashCode(); String toStringWithSign(); @Override String toString(); }
Price implements Comparable<Price> { public Price plus(final Price other) { return new Price(price + other.price); } Price(final double price);  Price(final long price);  Price(final long value, final PriceUnit unit); long asPipette(); double asDouble(); Price plus(final Price other); Price plus(final int amount, final PriceUnit unit); Price plus(final double value, final RatioUnit unit); Price plus(final Ratio ratio); Price minus(final Price other); Price minus(final int amount, final PriceUnit unit); Price minus(final double value, final RatioUnit unit); Price minus(final Ratio ratio); Price inverse(); Price absolute(); Price multiply(final Ratio ratio); Money multiply(final Volume volume, final Currency currency); Ratio divide(final Price divisor); boolean isLessThan(final Price other); boolean isGreaterThan(final Price other); boolean isStrongerThan(final Price other, final MarketDirection direction); boolean isWeakerThan(final Price other, final MarketDirection direction); boolean isBetweenInclusive(final Price a, final Price b); @Override boolean equals(final Object other); @Override int compareTo(final Price other); @Override int hashCode(); String toStringWithSign(); @Override String toString();  }