ComponentAssert

java.lang.Object
- <any>
- - com.facebook.litho.testing.assertj.ComponentAssert

```
public final class ComponentAssert
extends <any>
```
Assertion methods for Components.
To create an instance of this class, invoke assertThat(ComponentContext, Component) or assertThat(Component.Builder).
Alternatively, use LithoAssertions which provides entry points to all Litho AssertJ helpers.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`LithoViewAssert`	`afterStateUpdate()` Performs a state update and returns the new view.
`static ComponentAssert`	`assertThat(Component.Builder<?> builder)`
`static ComponentAssert`	`assertThat(ComponentContext componentContext, Component component)`
`ComponentAssert`	`containsOnlySubComponents(SubComponent... subComponents)` Deprecated. Use `extractingSubComponents(com.facebook.litho.ComponentContext)` instead.
`ComponentAssert`	`containsSubComponent(SubComponent subComponent)` Deprecated. Use `extractingSubComponents(com.facebook.litho.ComponentContext)` instead.
`ComponentAssert`	`doesNotContainSubComponent(SubComponent subComponent)` Deprecated. Use `extractingSubComponents(com.facebook.litho.ComponentContext)` instead.
`ComponentAssert`	`doesNotHaveVisibleDrawable(Drawable drawable)` Inverse of `hasVisibleDrawable(Drawable)`
`ComponentAssert`	`doesNotHaveVisibleText(String text)` Inverse of `hasVisibleText(String)`
`<A> <any>`	`extracting(<any> extractor)` Extract values from the underlying component based on the `Extractor` provided.
`ComponentAssert`	`extractingSubComponentAt(int index)`
`<any>`	`extractingSubComponents(ComponentContext c)` Extract the sub components from the underlying Component, returning a ListAssert over it.
`<any>`	`extractingSubComponentsDeeply(ComponentContext c)` Extract the sub components recursively from the underlying Component, returning a ListAssert over it.
`ComponentAssert`	`hasContentDescription(String contentDescription)` Assert that any view in the given Component has the provided content description.
`ComponentAssert`	`hasNoSubComponents()` Deprecated. Use `extractingSubComponents(com.facebook.litho.ComponentContext)` instead.
`ComponentAssert`	`hasSubComponents(SubComponent... subComponents)` Deprecated. Use `extractingSubComponents(com.facebook.litho.ComponentContext)` instead.
`ComponentAssert`	`hasViewTag(int tagId, Object tagValue)` Assert that the view tag is present for the given index.
`ComponentAssert`	`hasVisibleDrawable(Drawable drawable)` Assert that the given component contains the drawable provided.
`ComponentAssert`	`hasVisibleDrawable(int drawableRes)` Assert that the given component contains the drawable identified by the provided drawable resource id.
`ComponentAssert`	`hasVisibleText(int resourceId)` Assert that the given component has the exact text identified by resource id.
`ComponentAssert`	`hasVisibleText(String text)` Assert that the given component has the exact text provided.
`ComponentAssert`	`hasVisibleTextMatching(String pattern)` Assert that the given component contains the provided pattern.
`ComponentAssert`	`willNotRender()`
`ComponentAssert`	`willRender()` Assert that a given `Component` produces a layout that's not equivalent to `ComponentContext.NULL_LAYOUT`.
`LithoViewAssert`	`withStateUpdate(StateUpdatesTestHelper.StateUpdater updater)`
`ComponentAssert`	`wontRender()` Assert that a given `Component` renders to null, i.e.

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

- Method Detail
  - assertThat
```
public static ComponentAssert assertThat(ComponentContext componentContext,
                                         Component component)
```
  - assertThat
```
public static ComponentAssert assertThat(Component.Builder<?> builder)
```
  - afterStateUpdate
```
public LithoViewAssert afterStateUpdate()
```
    Performs a state update and returns the new view.
  - withStateUpdate
```
public LithoViewAssert withStateUpdate(StateUpdatesTestHelper.StateUpdater updater)
```
  - hasNoSubComponents
```
@Deprecated
public ComponentAssert hasNoSubComponents()
```
    Deprecated. Use extractingSubComponents(com.facebook.litho.ComponentContext) instead.
    
    Assert that the given component has no sub-components.
  - containsSubComponent
```
@Deprecated
public ComponentAssert containsSubComponent(SubComponent subComponent)
```
    Deprecated. Use extractingSubComponents(com.facebook.litho.ComponentContext) instead.
    
    Assert that the given component contains the provided sub-component.
  - doesNotContainSubComponent
```
@Deprecated
public ComponentAssert doesNotContainSubComponent(SubComponent subComponent)
```
    Deprecated. Use extractingSubComponents(com.facebook.litho.ComponentContext) instead.
    
    Assert that the given component does not contain the provided sub-component.
  - hasContentDescription
```
public ComponentAssert hasContentDescription(String contentDescription)
```
    Assert that any view in the given Component has the provided content description.
  - hasVisibleDrawable
```
public ComponentAssert hasVisibleDrawable(int drawableRes)
```
    Assert that the given component contains the drawable identified by the provided drawable resource id.
  - hasVisibleDrawable
```
public ComponentAssert hasVisibleDrawable(Drawable drawable)
```
    Assert that the given component contains the drawable provided.
  - doesNotHaveVisibleDrawable
```
public ComponentAssert doesNotHaveVisibleDrawable(Drawable drawable)
```
    Inverse of hasVisibleDrawable(Drawable)
  - hasVisibleText
```
public ComponentAssert hasVisibleText(String text)
```
    Assert that the given component has the exact text provided.
  - hasVisibleText
```
public ComponentAssert hasVisibleText(int resourceId)
```
    Assert that the given component has the exact text identified by resource id.
  - doesNotHaveVisibleText
```
public ComponentAssert doesNotHaveVisibleText(String text)
```
    Inverse of hasVisibleText(String)
  - hasVisibleTextMatching
```
public ComponentAssert hasVisibleTextMatching(String pattern)
```
    Assert that the given component contains the provided pattern.
  - hasViewTag
```
public ComponentAssert hasViewTag(int tagId,
                                  Object tagValue)
```
    Assert that the view tag is present for the given index.
    
    Parameters:
    
    tagId - Index of the view tag.
    
    tagValue - View tag value.
  - hasSubComponents
```
@Deprecated
public ComponentAssert hasSubComponents(SubComponent... subComponents)
```
    Deprecated. Use extractingSubComponents(com.facebook.litho.ComponentContext) instead.
    
    Verifies that the component contains the exact list of provided sub-components.
  - containsOnlySubComponents
```
@Deprecated
public ComponentAssert containsOnlySubComponents(SubComponent... subComponents)
```
    Deprecated. Use extractingSubComponents(com.facebook.litho.ComponentContext) instead.
    
    Verifies that the component contains only the given sub-components and nothing else, in order.
  - extracting
```
public <A> <any> extracting(<any> extractor)
```
    Extract values from the underlying component based on the Extractor provided.
    
    Type Parameters:
    
    A - Type of the value extracted.
    
    Parameters:
    
    extractor - The extractor applied to the Component.
    
    Returns:
    
    ListAssert for the extracted values.
  - extractingSubComponents
```
public <any> extractingSubComponents(ComponentContext c)
```
    Extract the sub components from the underlying Component, returning a ListAssert over it.
  - extractingSubComponentsDeeply
```
public <any> extractingSubComponentsDeeply(ComponentContext c)
```
    Extract the sub components recursively from the underlying Component, returning a ListAssert over it.
  - extractingSubComponentAt
```
public ComponentAssert extractingSubComponentAt(int index)
```
  - wontRender
```
public ComponentAssert wontRender()
```
    Assert that a given Component renders to null, i.e. its onCreateLayout method resolves to a ComponentContext.NULL_LAYOUT.
  - willRender
```
public ComponentAssert willRender()
```
    Assert that a given Component produces a layout that's not equivalent to ComponentContext.NULL_LAYOUT.
  - willNotRender
```
public ComponentAssert willNotRender()
```
    See Also:
    
    wontRender()

Class ComponentAssert

Method Summary

Methods inherited from class java.lang.Object

Method Detail

assertThat

assertThat

afterStateUpdate

withStateUpdate

hasNoSubComponents

containsSubComponent

doesNotContainSubComponent

hasContentDescription

hasVisibleDrawable

hasVisibleDrawable

doesNotHaveVisibleDrawable

hasVisibleText

hasVisibleText

doesNotHaveVisibleText

hasVisibleTextMatching

hasViewTag

hasSubComponents

containsOnlySubComponents

extracting

extractingSubComponents

extractingSubComponentsDeeply

extractingSubComponentAt

wontRender

willRender

willNotRender