feat: add getAllByTestId and queryAllByTestId queries (#198)

* feat: add getAllByTestId and queryAllByTestId queries

* Add test for getAllByTestId and queryAllByTestId

- Filter out intermediate components in getAllByTestId. testIDs may be passed down to child components and appearing multiple times in the render tree. Some React Native components render multiple anyways. <Text> is an example.

* Update TypeScript typings

* Fix flow types

* Update TS typings test

src/helpers/getByAPI.js

@@ -212,6 +212,21 @@ export const getAllByProps = (instance: ReactTestInstance) =>
     return results;
   };
 
+export const getAllByTestId = (instance: ReactTestInstance) =>
+  function getAllByTestIdFn(testID: string): ReactTestInstance[] {
+    const results = instance
+      .findAllByProps({ testID })
+      .filter(element => typeof element.type === 'string');
+
+    if (results.length === 0) {
+      throw new ErrorWithStack(
+        `No instances found with testID: ${String(testID)}`,
+        getAllByTestIdFn
+      );
+    }
+    return results;
+  };
+
 export const getByAPI = (instance: ReactTestInstance) => ({
   getByTestId: getByTestId(instance),
   getByName: getByName(instance),
@@ -220,6 +235,7 @@ export const getByAPI = (instance: ReactTestInstance) => ({
   getByPlaceholder: getByPlaceholder(instance),
   getByDisplayValue: getByDisplayValue(instance),
   getByProps: getByProps(instance),
+  getAllByTestId: getAllByTestId(instance),
   getAllByName: getAllByName(instance),
   getAllByType: getAllByType(instance),
   getAllByText: getAllByText(instance),

src/helpers/queryByAPI.js

@@ -8,6 +8,7 @@ import {
   getByPlaceholder,
   getByDisplayValue,
   getByProps,
+  getAllByTestId,
   getAllByName,
   getAllByType,
   getAllByText,
@@ -142,6 +143,16 @@ export const queryAllByProps = (instance: ReactTestInstance) => (props: {
   }
 };
 
+export const queryAllByTestId = (instance: ReactTestInstance) => (
+  testID: string
+) => {
+  try {
+    return getAllByTestId(instance)(testID);
+  } catch (error) {
+    return [];
+  }
+};
+
 export const queryByAPI = (instance: ReactTestInstance) => ({
   queryByTestId: queryByTestId(instance),
   queryByName: queryByName(instance),
@@ -150,6 +161,7 @@ export const queryByAPI = (instance: ReactTestInstance) => ({
   queryByPlaceholder: queryByPlaceholder(instance),
   queryByDisplayValue: queryByDisplayValue(instance),
   queryByProps: queryByProps(instance),
+  queryAllByTestId: queryAllByTestId(instance),
   queryAllByName: queryAllByName(instance),
   queryAllByType: queryAllByType(instance),
   queryAllByText: queryAllByText(instance),