app-reviews/Libraries/iTunes/Test/Tests/Endpoints/GetReviewsAPIEndpointTests.swift

//
//  GetReviewsAPIEndpointTests.swift
//  ReviewsiTunesTest
//
//  Created by Javier Cicchelli on 17/03/2024.
//  Copyright © 2024 Röck+Cöde VoF. All rights reserved.
//

import ReviewsFeedKit
import ReviewsFoundationKit
import XCTest

@testable import ReviewsiTunesKit

final class GetReviewsAPIEndpointTests: XCTestCase {
    
    // MARK: Properties
    private var input: GetReviewsAPIEndpoint.Input!
    private var sut: GetReviewsAPIEndpoint!

    // MARK: Setup
    override func setUp() async throws {
        sut = .init(
            host: .iTunes,
            decoder: .default,
            session: .init(configuration: .mock)
        )
    }
    
    // MARK: Functions tests
    func testCallAsFunction_whenResponseOK_withOneReview() async throws {
        // GIVEN
        let reviews: [Review] = .one
        
        input = .init(
            appID: "1234567890",
            countryCode: "abc"
        )
        
        MockURLProtocol.response = .init(
            statusCode: 200,
            object: Feed(entries: reviews)
        )

        // WHEN
        let output = try await sut(input)
        
        // THEN
        XCTAssertFalse(output.reviews.isEmpty)
        XCTAssertEqual(output.reviews, reviews)
    }
    
    func testCallAsFunction_whenResponseOK_withManyReviews() async throws {
        // GIVEN
        let reviews: [Review] = .many
        
        input = .init(
            appID: "1234567890",
            countryCode: "abc"
        )
        
        MockURLProtocol.response = .init(
            statusCode: 200,
            object: Feed(entries: reviews)
        )
        
        // WHEN
        let output = try await sut(input)
        
        // THEN
        XCTAssertFalse(output.reviews.isEmpty)
        XCTAssertEqual(output.reviews, reviews)
    }
    
    func testCallAsFunction_whenResponseOK_withEmptyReviews() async throws {
        // GIVEN
        let reviews: [Review] = .empty
        
        input = .init(
            appID: "1234567890",
            countryCode: "abc"
        )
        
        MockURLProtocol.response = .init(
            statusCode: 200,
            object: Feed(entries: reviews)
        )
        
        // WHEN
        let output = try await sut(input)
        
        // THEN
        XCTAssertTrue(output.reviews.isEmpty)
        XCTAssertEqual(output.reviews, reviews)
    }
    
    func testCallAsFunction_whenResponseNotOK() async throws {
        // GIVEN
        let statusCode = 404

        input = .init(
            appID: "1234567890",
            countryCode: "abc"
        )
        
        MockURLProtocol.response = .init(statusCode: statusCode)
        
        // WHEN
        // THEN
        do {
            try await sut(input)
        } catch EndpointError.requestFailed(statusCode: statusCode) {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }

    func testMakePath_withFilledInput() throws {
        // GIVEN
        input = .init(
            appID: "1234567890",
            countryCode: "abc"
        )

        // WHEN
        let path = try sut.makePath(with: input)
        
        // THEN
        XCTAssertEqual(path, "/\(input.countryCode)/rss/customerreviews/id=\(input.appID)/sortby=mostrecent/json")
    }
    
    func testMakePath_withPartiallyFilledInput() throws {
        // GIVEN
        input = .init(
            appID: .empty,
            countryCode: "abc"
        )
        
        // WHEN
        // THEN
        XCTAssertThrowsError(try sut.makePath(with: input)) { error in
            XCTAssertEqual(error as? EndpointError, .inputParametersEmpty)
        }
    }
    
    func testMakePath_withEmptyInput() throws {
        // GIVEN
        input = .init(
            appID: .empty,
            countryCode: .empty
        )
        
        // WHEN
        // THEN
        XCTAssertThrowsError(try sut.makePath(with: input)) { error in
            XCTAssertEqual(error as? EndpointError, .inputParametersEmpty)
        }
    }

}