com.facebook.litho.annotations

Annotation Type TestSpec

public @interface TestSpec

An interface that is annotated with this annotation will be used to generate a matcher based on the underlying spec. This matcher can in turn be used in tests to verify that mounted components contain certain properties.

For example:

  @TestSpec(MyLayoutSpec.class)
  public interface TestMyLayoutSpec {}
 
 

This will generate a corresponding TestMyLayout class which implements the provided interface. It contains a Matcher for the properties of the specified MyLayoutSpec component spec. This can be used in tests as follows:

  @Test
  public void testMyLayoutSpec() {
    final ComponentContext c = mComponentsRule.getContext();
    assertThat(c, mComponent)
        .has(subComponentWith(c,
            TestMyLayoutSpec.matcher(c)
                .title(containsString("My Partial Titl"))
                .someOtherProperty(14)
                .build()));
  }
 
 

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
java.lang.Class<?>	value A Component Spec class which is annotated with either LayoutSpec or MountSpec.

Element Detail

value

public abstract java.lang.Class<?> value

A Component Spec class which is annotated with either LayoutSpec or MountSpec.