[@types/cavy] Update cavy types for beforeEach and useCavy functions (#35256)

* Add beforeEach and useCavy function types to Cavy

* Linting and version update

types/cavy/cavy-tests.tsx

@@ -1,7 +1,7 @@
 import * as React from 'react';
 import { TextInput, View, Text } from 'react-native';
 
-import { hook, TestScope, WithTestHook, Tester } from 'cavy';
+import { hook, TestScope, WithTestHook, Tester, useCavy } from 'cavy';
 
 type Props = WithTestHook<{
   foo: string;
@@ -20,8 +20,17 @@ class SampleComponent extends React.Component<Props> {
 
 const HookedSampleComponent = hook(SampleComponent); // $ExpectType ComponentClass<{ foo: string; }, any>
 
+const SampleFunctionComponent: React.FunctionComponent = () => {
+  const generateTestHook = useCavy();
+  return (
+    <View ref={generateTestHook(`FunctionView.Sample`)}></View>
+  );
+};
+
 function sampleSpec(spec: TestScope) {
   spec.describe('it has a name and callback', () => {
+    spec.beforeEach(() => {});
+
     spec.it('it has a name and callback', async () => {
       spec.component.reRender(); // $ExpectType void
       spec.component.clearAsync(); // $ExpectType Promise<void>
@@ -37,4 +46,5 @@ function sampleSpec(spec: TestScope) {
 
 <Tester specs={[sampleSpec]} waitTime={42}>
   <HookedSampleComponent foo="test" />
+  <SampleFunctionComponent/>
 </Tester>;

types/cavy/index.d.ts

@@ -1,6 +1,7 @@
-// Type definitions for cavy 0.6
+// Type definitions for cavy 2.0
 // Project: https://github.com/pixielabs/cavy
 // Definitions by: Tyler Hoffman <https://github.com/tyler-hoffman>
+//                 Abigail McPhillips <https://github.com/AbigailMcP>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
 
@@ -16,6 +17,8 @@ export type WithTestHook<T extends {}> = T & { generateTestHook: TestHookGenerat
 
 export function hook<T extends {}>(component: React.ComponentClass<WithTestHook<T>>): React.ComponentClass<T>;
 
+export function useCavy(): TestHookGenerator;
+
 export interface TesterProps {
     specs: Array<(spec: TestScope) => void>;
     waitTime: number;
@@ -32,6 +35,7 @@ export class TestScope {
     findComponent(identifier: string): Promise<React.Component>;
     describe(label: string, fn: () => void): void;
     it(label: string, fn: () => void): void;
+    beforeEach(fn: () => void): void;
     press(identifier: string): Promise<void>;
     fillIn(identifier: string, str: string): Promise<void>;
     pause(time: number): Promise<void>;