ios - Earlgrey iOS 测试在范围内找不到“grey_tap”

Question

我刚刚在 xCode 上完成了 Earlgrey 的设置。设置进行得很顺利，但是当我添加小代码片段进行测试时，它会引发此错误

Swift Compiler Error Group
Cannot find 'grey_keyWindow' in scope
Cannot find 'grey_tap' in scope
Cannot find 'grey_sufficientlyVisible' in scope

这是编写的简单测试代码

func testExample() throws {
        // UI tests must launch the application that they test.
        let app = XCUIApplication()
        app.launch()
        EarlGrey.selectElement(with: grey_keyWindow()).perform(grey_tap())
            .assert(grey_sufficientlyVisible())

        // Use recording to get started writing UI tests.
        // Use XCTAssert and related functions to verify your tests produce the correct results.
    }

我可以尝试什么来解决这个问题？