ZcashLightClientKit/Tests/DarksideTests/ZcashLightClientKitTests.swift

//
//  ZcashLightClientKitTests.swift
//  ZcashLightClientKitTests
//
//  Created by Jack Grigg on 5/8/19.
//  Copyright © 2019 Electric Coin Company. All rights reserved.
//

import XCTest
import GRPC
@testable import TestUtils
@testable import ZcashLightClientKit

// swiftlint:disable implicitly_unwrapped_optional force_try force_unwrapping
class ZcashLightClientKitTests: XCTestCase {
    var latestBlockHeight: BlockHeight!
    var service: LightWalletGRPCService!

    override func setUp() {
        super.setUp()
        service = LightWalletGRPCService(endpoint: LightWalletEndpoint(address: Constants.address, port: 9067))
        
        latestBlockHeight = try! service.latestBlock().compactBlockHeight()!
    }
    
    override func tearDown() {
        super.tearDown()
        service = nil
        latestBlockHeight = nil
    }
    
    func testEnvironmentLaunch() {
        let address = Constants.address
        
        XCTAssertFalse(address.isEmpty, "Your \'\(Environment.lightwalletdKey)\' key is missing from your launch environment variables")
    }
    
    func testService() {
        // and that it has a non-zero size
        XCTAssert(latestBlockHeight > 0)
    }
    
    func testBlockRangeServiceTilLastest() {
        let expectedCount: BlockHeight = 99
        var count: BlockHeight = 0
        
        let startHeight = latestBlockHeight - expectedCount
        let endHeight = latestBlockHeight!
        var blocks: [CompactBlock] = []
        guard let call = try? service!.blockRange(startHeight: startHeight, endHeight: endHeight, result: {
            blocks.append($0)
            count += 1
        }) else {
            XCTFail("failed to create getBlockRange( \(startHeight) ..<= \(endHeight)")
            return
        }
        
        _ = try! call.status.wait()
        XCTAssertEqual(expectedCount + 1, count)
    }
}