CoreMatchers (JUnit API)
Keywords: org.hamcrest.CoreMatchers class

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## org.hamcrest
Class CoreMatchers

    java.lang.Object
      org.hamcrest.CoreMatchers

    public class CoreMatchers

extends Object

Constructor Summary
`CoreMatchers()`

Method Summary
`static
`<T> Matcher<T>`
` | `allOf(Iterable<Matcher<? extends T>> matchers)` Evaluates to true only if ALL of the passed in matchers evaluate to true.
`static
`<T> Matcher<T>`
` | `allOf(Matcher<? extends T>... matchers)` Evaluates to true only if ALL of the passed in matchers evaluate to true.
`static
`<T> Matcher<T>`
` | `any(Class<T> type)` This matcher always evaluates to true.
`static
`<T> Matcher<T>`
` | `anyOf(Iterable<Matcher<? extends T>> matchers)` Evaluates to true if ANY of the passed in matchers evaluate to true.
`static
`<T> Matcher<T>`
` | `anyOf(Matcher<? extends T>... matchers)` Evaluates to true if ANY of the passed in matchers evaluate to true.
`static
`<T> Matcher<T>`
` | `anything()` This matcher always evaluates to true.
`static
`<T> Matcher<T>`
` | `anything(String description)` This matcher always evaluates to true.
`static
`<T> Matcher<T>`
` | `describedAs(String description, Matcher<T> matcher, Object... values)` Wraps an existing matcher and overrides the description when it fails.
`static
`<T> Matcher<T>`
` | `equalTo(T operand)` Is the value equal to another value, as tested by the `Object.equals(java.lang.Object)` invokedMethod?
`static Matcher<Object>` | `instanceOf(Class<?> type)` Is the value an instance of a particular type?
`static Matcher<Object>` | `is(Class<?> type)` This is a shortcut to the frequently used is(instanceOf(SomeClass.class)).
`static
`<T> Matcher<T>`
` | `is(Matcher<T> matcher)` Decorates another Matcher, retaining the behavior but allowing tests to be slightly more expressive.
`static
`<T> Matcher<T>`
` | `is(T value)` This is a shortcut to the frequently used is(equalTo(x)).
`static
`<T> Matcher<T>`
` | `not(Matcher<T> matcher)` Inverts the rule.
`static
`<T> Matcher<T>`
` | `not(T value)` This is a shortcut to the frequently used not(equalTo(x)).
`static
`<T> Matcher<T>`
` | `notNullValue()` Matches if value is not null.
`static
`<T> Matcher<T>`
` | `notNullValue(Class<T> type)` Matches if value is not null.
`static
`<T> Matcher<T>`
` | `nullValue()` Matches if value is null.
`static
`<T> Matcher<T>`
` | `nullValue(Class<T> type)` Matches if value is null.
`static
`<T> Matcher<T>`
` | `sameInstance(T object)` Creates a new instance of IsSame

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### CoreMatchers

    public CoreMatchers()

Method Detail

### is

    public static <T> Matcher<T> is(Matcher<T> matcher)

  Decorates another Matcher, retaining the behavior but allowing tests to be slightly more expressive. eg. assertThat(cheese, equalTo(smelly)) vs assertThat(cheese, is(equalTo(smelly)))

### is

    public static <T> Matcher<T> is(T value)

  This is a shortcut to the frequently used is(equalTo(x)). eg. assertThat(cheese, is(equalTo(smelly))) vs assertThat(cheese, is(smelly))

### is

    public static Matcher<Object> is(Class<?> type)

  This is a shortcut to the frequently used is(instanceOf(SomeClass.class)). eg. assertThat(cheese, is(instanceOf(Cheddar.class))) vs assertThat(cheese, is(Cheddar.class))

### not

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

  Inverts the rule.

### not

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

  This is a shortcut to the frequently used not(equalTo(x)). eg. assertThat(cheese, is(not(equalTo(smelly)))) vs assertThat(cheese, is(not(smelly)))

### equalTo

    public static <T> Matcher<T> equalTo(T operand)

  Is the value equal to another value, as tested by the `Object.equals(java.lang.Object)` invokedMethod?

### instanceOf

    public static Matcher<Object> instanceOf(Class<?> type)

  Is the value an instance of a particular type?

### allOf

    public static <T> Matcher<T> allOf(Matcher<? extends T>... matchers)

  Evaluates to true only if ALL of the passed in matchers evaluate to true.

### allOf

    public static <T> Matcher<T> allOf(Iterable<Matcher<? extends T>> matchers)

  Evaluates to true only if ALL of the passed in matchers evaluate to true.

### anyOf

    public static <T> Matcher<T> anyOf(Matcher<? extends T>... matchers)

  Evaluates to true if ANY of the passed in matchers evaluate to true.

### anyOf

    public static <T> Matcher<T> anyOf(Iterable<Matcher<? extends T>> matchers)

  Evaluates to true if ANY of the passed in matchers evaluate to true.

### sameInstance

    public static <T> Matcher<T> sameInstance(T object)

  Creates a new instance of IsSame

  Parameters:
    `object` - The predicate evaluates to true only when the argument is this object.

### anything

    public static <T> Matcher<T> anything()

  This matcher always evaluates to true.

### anything

    public static <T> Matcher<T> anything(String description)

  This matcher always evaluates to true.

  Parameters:
    `description` - A meaningful string used when describing itself.

### any

    public static <T> Matcher<T> any(Class<T> type)

  This matcher always evaluates to true. With type inference.

### nullValue

    public static <T> Matcher<T> nullValue()

  Matches if value is null.

### nullValue

    public static <T> Matcher<T> nullValue(Class<T> type)

  Matches if value is null. With type inference.

### notNullValue

    public static <T> Matcher<T> notNullValue()

  Matches if value is not null.

### notNullValue

    public static <T> Matcher<T> notNullValue(Class<T> type)

  Matches if value is not null. With type inference.

### describedAs

    public static <T> Matcher<T> describedAs(String description,
                                             Matcher<T> matcher,
                                             Object... values)

  Wraps an existing matcher and overrides the description when it fails.

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