Class 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 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