The document summarizes techniques for testing JSON parsing and HTTP requests in iOS. It shows how to load test JSON data from bundled files using a TestDataHelper class. It also demonstrates improving HTTP stubbing by creating an HTTPStub struct to activate and deactivate stub responses. The last part announces an upcoming iOS test night on December 14th at Pixiv Inc.

1. 2018/12/10 iOS Test Night #9 2 #ios_test_night
(@ktanaka117)

2. • / @ktanaka117
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• R&D Swift TDD
• PEAKS iOS

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4. Json 🤔
let hogeURL = Bundle(for: type(of: self))
.url(forResource: "Hoge", withExtension: "json")!
let data = try! Data(contentsOf: hogeURL)
let decoder = JSONDecoder()
let hoge = try! decoder.decode(Hoge.self, from: data)
hoge Stub hoge

5. Json 😄
hoge
let hoge: Hoge = TestDataHelper
.testData(forResource: "Hoge", ofType: "json")

6. Json -
class TestDataHelper {
static func testData<T: Decodable>(forResource resource: String, ofType type: String) -> T {
let url = Bundle(for: TestDataHelper.self).url(forResource: resource, withExtension: type)!
let data = try! Data(contentsOf: url)
let decoder = JSONDecoder()
return try! decoder.decode(T.self, from: data)
}
}

7. Response HTTP Stub🤔
var responses = [authError, successWithAccessToken, success]
stub(condition: isHost("example.com")) { request in
return responses.removeFirst()
}
// ......
// ...
OHHTTPStubs.removeAllStubs()
responses test function …

8. Response HTTP Stub😄
HTTPStub.activate(
condition: isHost("example.com"),
responses: [authError, successWithAccessToken, success])
// ......
// ...
HTTPStub.deactivate()
responses

9. Response HTTP Stub -
struct HTTPStub {
static func activate(condition: @escaping OHHTTPStubsTestBlock,
responses: [OHHTTPStubsResponse]) {
var responsesArray = responses
stub(condition: condition) { request in
let response = responsesArray.removeFirst()
return response
}
}
static func deactivate() {
OHHTTPStubs.removeAllStubs()
}
}

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11. 12/14 in
APIClient

12. 2019/01/15 in pixiv Inc.
iOS