Package org.hamcrest.core

Class IsNot<T>

java.lang.Object

org.hamcrest.BaseMatcher<T>

org.hamcrest.core.IsNot<T>

Type Parameters:

T - the matched value type

All Implemented Interfaces:

Matcher<T>, SelfDescribing

public class IsNot<T>
extends BaseMatcher<T>

Calculates the logical negation of a matcher.

Constructor Summary

Constructors

Constructor	Description
IsNot(Matcher<T> matcher)	Constructor, best called from not(Object) or not(Matcher).

Method Summary

Modifier and Type	Method	Description
void	describeTo(Description description)	Generates a description of the object.
boolean	matches(Object arg)	Evaluates the matcher for argument item.
static <T> Matcher<T>	not(Matcher<T> matcher)	Creates a matcher that wraps an existing matcher, but inverts the logic by which it will match.
static <T> Matcher<T>	not(T value)	A shortcut to the frequently used not(equalTo(x)).

Methods inherited from class org.hamcrest.BaseMatcher

_dont_implement_Matcher___instead_extend_BaseMatcher_, describeMismatch, isNotNull, toString

Methods inherited from class java.lang.Object

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

Constructor Details

IsNot

public IsNot(Matcher<T> matcher)

Constructor, best called from not(Object) or not(Matcher).

Parameters:

matcher - the matcher to negate

Method Details

matches

public boolean matches(Object arg)

Description copied from interface: Matcher

Evaluates the matcher for argument item. This method matches against Object, instead of the generic type T. This is because the caller of the Matcher does not know at runtime what the type is (because of type erasure with Java generics). It is down to the implementations to check the correct type.

Parameters:

arg - the object against which the matcher is evaluated.

Returns:

true if item matches, otherwise false.

See Also:

• BaseMatcher

describeTo

public void describeTo(Description description)

Description copied from interface: SelfDescribing

Generates a description of the object. The description may be part of 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.

not

public static <T> Matcher<T> not(Matcher<T> matcher)

Creates a matcher that wraps an existing matcher, but inverts the logic by which it will match. For example:

assertThat(cheese, is(not(equalTo(smelly))))

Type Parameters:

T - the matcher type.

Parameters:

matcher - the matcher whose sense should be inverted

Returns:

The matcher.

not

public static <T> Matcher<T> not(T value)

A shortcut to the frequently used not(equalTo(x)). For example:

assertThat(cheese, is(not(smelly)))

instead of:

assertThat(cheese, is(not(equalTo(smelly))))

Type Parameters:

T - the matcher type.

Parameters:

value - the value that any examined object should not equal

Returns:

The matcher.