Summary
One of the main benefits of the Hamcrest style confirmations is their ability to be extended through custom matchers. What better way to explore this ability than through floating-point confirmations? Because there is no single best way to compare floating-point values, you might need a solution that’s tuned to your specific needs. You learned about a good general-purpose floating-point comparison technique in this chapter that scales a small margin of error so that bigger floating-point values are allowed to differ by greater amounts as the values get bigger and still be considered to be equal.
If this general solution doesn’t meet your needs, you now know how to create your own matcher that will do exactly what you need.
And the ability to extend matchers doesn’t stop at floating-point values. You might have your own custom behavior that you need to confirm, and after reading this chapter, you now know how to create a custom matcher to do what you...
