An example test case for a framework. https://medium.com/better-programming/ios-build-your-cocoapods-framework-with-an-example-app-from-scratch-fd0f7bdf3f8c

HelloWorldSDKTests.swift

import XCTest
@testable import HelloWorldSDK

class HelloWorldSDKTests: XCTestCase {

    func testHelloWorld() {
        let hw = HelloWorld()

        // test public method
        XCTAssertEqual(hw.hello(to: "World"), "Hello World")

        // test internal property
        XCTAssertEqual(hw.greet, "Hello")
    }

}