2 new first test

1 Add Unit Test Case Class

2 make sure that the test is associated with the Unit Test target

3 For Swift Tests:

class MyFirstEarlGreyTest: XCTestCase {

func testExample() {

// Your test actions and assertions will go here.

}

}

4 test the schema 

5 api :https://github.com/google/EarlGrey/blob/master/docs/api.md