# Checks Summary:[Methods](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#) # Checks | This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings). ` public final class Checks ` ` extends `[Object](https://developer.android.com/reference/java/lang/Object.html)` `` ` |---|---------------------------------------------| | [java.lang.Object](https://developer.android.com/reference/java/lang/Object.html) || | ↳ | android.support.test.espresso.intent.Checks |
*** ** * ** *** Substitute for Guava Preconditions to avoid guava as a dep. ## Summary | ### Public methods || |-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` static void` | ` `[checkArgument](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkArgument(boolean, java.lang.Object))`(boolean expression, `[Object](https://developer.android.com/reference/java/lang/Object.html)` errorMessage) ` | | ` static void` | ` `[checkArgument](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkArgument(boolean))`(boolean expression) ` | | ` static void` | ` `[checkArgument](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkArgument(boolean, java.lang.String, java.lang.Object...))`(boolean expression, `[String](https://developer.android.com/reference/java/lang/String.html)` errorMessageTemplate, `[Object...](https://developer.android.com/reference/java/lang/Object.html)` errorMessageArgs) ` | | ` static T` | ` `[checkNotNull](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkNotNull(T, java.lang.Object))`(T reference, `[Object](https://developer.android.com/reference/java/lang/Object.html)` errorMessage) ` | | ` static T` | ` `[checkNotNull](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkNotNull(T))`(T reference) ` | | ` static T` | ` `[checkNotNull](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkNotNull(T, java.lang.String, java.lang.Object...))`(T reference, `[String](https://developer.android.com/reference/java/lang/String.html)` errorMessageTemplate, `[Object...](https://developer.android.com/reference/java/lang/Object.html)` errorMessageArgs) ` | | ` static void` | ` `[checkState](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkState(boolean, java.lang.Object))`(boolean expression, `[Object](https://developer.android.com/reference/java/lang/Object.html)` errorMessage) ` | | ` static void` | ` `[checkState](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#checkState(boolean, java.lang.String, java.lang.Object...))`(boolean expression, `[String](https://developer.android.com/reference/java/lang/String.html)` errorMessageTemplate, `[Object...](https://developer.android.com/reference/java/lang/Object.html)` errorMessageArgs) ` | | ### Inherited methods | |-----------------------|---| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/test/espresso/intent/Checks#)From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object.html)` ` |-------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object.html) | ` clone() ` | | ` boolean` | ` equals(`[Object](https://developer.android.com/reference/java/lang/Object.html)` arg0) ` | | ` void` | ` finalize() ` | | ` final `[Class](https://developer.android.com/reference/java/lang/Class.html)`` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` `[String](https://developer.android.com/reference/java/lang/String.html) | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | || ## Public methods ### checkArgument ``` void checkArgument (boolean expression, Object errorMessage) ```

| Parameters || |----------------|------------------| | `expression` | `boolean`
| | `errorMessage` | `Object`
| ### checkArgument ``` void checkArgument (boolean expression) ```

| Parameters || |--------------|------------------| | `expression` | `boolean`
| ### checkArgument ``` void checkArgument (boolean expression, String errorMessageTemplate, Object... errorMessageArgs) ```

| Parameters || |------------------------|------------------| | `expression` | `boolean`
| | `errorMessageTemplate` | `String`
| | `errorMessageArgs` | `Object`
| ### checkNotNull ``` T checkNotNull (T reference, Object errorMessage) ```

| Parameters || |----------------|-----------------| | `reference` | `T`
| | `errorMessage` | `Object`
| | Returns || |-----|--------| | `T` |
| ### checkNotNull ``` T checkNotNull (T reference) ```

| Parameters || |-------------|------------| | `reference` | `T`
| | Returns || |-----|--------| | `T` |
| ### checkNotNull ``` T checkNotNull (T reference, String errorMessageTemplate, Object... errorMessageArgs) ```

| Parameters || |------------------------|-----------------| | `reference` | `T`
| | `errorMessageTemplate` | `String`
| | `errorMessageArgs` | `Object`
| | Returns || |-----|--------| | `T` |
| ### checkState ``` void checkState (boolean expression, Object errorMessage) ```

| Parameters || |----------------|------------------| | `expression` | `boolean`
| | `errorMessage` | `Object`
| ### checkState ``` void checkState (boolean expression, String errorMessageTemplate, Object... errorMessageArgs) ```

| Parameters || |------------------------|------------------| | `expression` | `boolean`
| | `errorMessageTemplate` | `String`
| | `errorMessageArgs` | `Object`
| - ## Interfaces - [ActivityResultFunction](https://developer.android.com/reference/android/support/test/espresso/intent/ActivityResultFunction) - [ResettingStubber](https://developer.android.com/reference/android/support/test/espresso/intent/ResettingStubber) - [ResolvedIntent](https://developer.android.com/reference/android/support/test/espresso/intent/ResolvedIntent) - [VerifiableIntent](https://developer.android.com/reference/android/support/test/espresso/intent/VerifiableIntent) - [VerificationMode](https://developer.android.com/reference/android/support/test/espresso/intent/VerificationMode) - ## Classes - [Checks](https://developer.android.com/reference/android/support/test/espresso/intent/Checks) - [Intents](https://developer.android.com/reference/android/support/test/espresso/intent/Intents) - [OngoingStubbing](https://developer.android.com/reference/android/support/test/espresso/intent/OngoingStubbing) - [ResettingStubberImpl](https://developer.android.com/reference/android/support/test/espresso/intent/ResettingStubberImpl) - [VerificationModes](https://developer.android.com/reference/android/support/test/espresso/intent/VerificationModes)