@Test public void addingOtherPricesShouldWork() { assertThat(new Price(50).plus(new Price(1.0))).isEqualTo(new Price(1.0005)); assertThat(new Price(2).plus(new Price(60).plus(new Price(500)))).isEqualTo(new Price(562)); assertThat(new Price(1.5).plus(new Price(0))).isEqualTo(new Price(1.5)); assertThat(new Price(0.2).plus(new Price(-0.4))).isEqualTo(new Price(-0.2)); assertThat(new Price(-50).plus(new Price(-60))).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();  }