org.hamcrest.number
Class IsCloseTo

java.lang.Object
  org.hamcrest.BaseMatcher<T>
      org.hamcrest.TypeSafeMatcher<java.lang.Double>
          org.hamcrest.number.IsCloseTo

All Implemented Interfaces:

Matcher<java.lang.Double>, SelfDescribing

public class IsCloseTo
extends TypeSafeMatcher<java.lang.Double>

Is the value a number equal to a value within some range of acceptable error?

Constructor Summary

IsCloseTo(double value, double error)

Method Summary

static Matcher<java.lang.Double>	closeTo(double operand, double error) Creates a matcher of Doubles that matches when an examined double is equal to the specified operand, within a range of +/- error.
void	describeMismatchSafely(java.lang.Double item, Description mismatchDescription) Subclasses should override this.
void	describeTo(Description description) Generates a description of the object.
boolean	matchesSafely(java.lang.Double item) Subclasses should implement this.

Methods inherited from class org.hamcrest.TypeSafeMatcher

describeMismatch, matches

Methods inherited from class org.hamcrest.BaseMatcher

_dont_implement_Matcher___instead_extend_BaseMatcher_, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

IsCloseTo

public IsCloseTo(double value,
                 double error)

Method Detail

matchesSafely

public boolean matchesSafely(java.lang.Double item)

Description copied from class: TypeSafeMatcher

Subclasses should implement this. The item will already have been checked for the specific type and will never be null.

Specified by:

matchesSafely in class TypeSafeMatcher<java.lang.Double>

describeMismatchSafely

public void describeMismatchSafely(java.lang.Double item,
                                   Description mismatchDescription)

Description copied from class: TypeSafeMatcher

Subclasses should override this. The item will already have been checked for the specific type and will never be null.

Overrides:

describeMismatchSafely in class TypeSafeMatcher<java.lang.Double>

describeTo

public void describeTo(Description description)

Description copied from interface: SelfDescribing

Generates a description of the object. The description may be part of a a description of a larger object of which this is just a component, so it should be worded appropriately.

Parameters:

description - The description to be built or appended to.

closeTo

public static Matcher<java.lang.Double> closeTo(double operand,
                                                double error)

Creates a matcher of Doubles that matches when an examined double is equal to the specified operand, within a range of +/- error.

For example:

assertThat(1.03, is(closeTo(1.0, 0.03)))

Parameters:

operand - the expected value of matching doubles

error - the delta (+/-) within which matches will be allowed