metrics integration testing

MetricsIntegrationTest.swift

/* 
To run those tests from commandline:

xcodebuild \
-workspace example/AeroGearSdkExample.xcworkspace \
-scheme AeroGearSdkExampleTests -sdk iphonesimulator \
-destination 'platform=iOS Simulator,name=iPhone 7' \
'-only-testing:AeroGearSdkExampleTests/MetricsIntegrationTests/_testPublishingDefaultMetricsShouldNotReturnError' \
'-only-testing:AeroGearSdkExampleTests/MetricsIntegrationTests/_testPublishingInvalidMetricsShouldReturnError' \
test CODE_SIGNING_REQUIRED=NO
**/

@testable import AGSCore
import Foundation
import XCTest


class MetricsIntegrationTests: XCTestCase {
    
    let metrics = AgsCore.instance.getMetrics()
    
    func _testPublishingDefaultMetricsShouldNotReturnError () {
        let expectation = XCTestExpectation(description: "Getting Success statusCode from App Metrics after sending device and app metrics")
        
        metrics.publish([DeviceMetrics(), AppMetrics(AgsCore.getMetadata())], { (response: AgsHttpResponse?) -> Void in
            
            XCTAssertNil(response?.error, "Expecting no error from response after sending valid metrics")
            
            if let statusCode = response?.statusCode {
                XCTAssert(statusCode < 300, "Expecting returned statusCode to be success (2xx), but it was \(statusCode)")
            }
            expectation.fulfill()
        })
        wait(for: [expectation], timeout: 10.0)
    }
    
    func _testPublishingInvalidMetricsShouldReturnError () {
        let expectation = XCTestExpectation(description: "Getting Server error from App Metrics after sending invalid (empty) metrics")
        
        metrics.publish([], { (response: AgsHttpResponse?) -> Void in
            
            if let statusCode = response?.statusCode {
                XCTAssert(statusCode == 400, "Expecting returned statusCode to be 400, but it was \(statusCode)")
            }
            expectation.fulfill()
        })
        wait(for: [expectation], timeout: 10.0)
    }
}