Introducing Microsoft Playwright Testing service private preview

How to configure Playwright service for .NET?

There are two ways: 

if you are using Playwright Nunit you just need to specify to env variables:

PLAYWRIGHT_SERVICE_ACCESS_TOKEN={MY-ACCESS-TOKEN}
PLAYWRIGHT_SERVICE_URL={MY-REGION-ENDPOINT}

to configure number of workers you can use runsettings file:

<?xml version="1.0" encoding="utf-8"?>
<RunSettings>
	<!-- NUnit adapter -->
	<NUnit>
		<NumberOfTestWorkers>50</NumberOfTestWorkers>
	</NUnit>
	<!-- General run configuration -->
	<RunConfiguration>
		<EnvironmentVariables>
			<!-- For debugging selectors, it's recommend to set the following environment variable -->
			<!-- <DEBUG>pw:api</DEBUG> -->
		</EnvironmentVariables>
		<MaxCpuCount>0</MaxCpuCount>
	</RunConfiguration>
</RunSettings>

if you are using Playwright Library you need to add the following code on browser initialization:

private Tuple<string, BrowserTypeConnectOptions> PlaywrightServiceConfiguration()
        {
            var accessKey = Environment.GetEnvironmentVariable("PLAYWRIGHT_SERVICE_ACCESS_KEY");
            var serviceUrl = Environment.GetEnvironmentVariable("PLAYWRIGHT_SERVICE_URL");
            if (!accessKey.IsNullOrEmpty() && !serviceUrl.IsNullOrEmpty())
            {
                var exposeNetwork = Environment.GetEnvironmentVariable("PLAYWRIGHT_SERVICE_EXPOSE_NETWORK") ?? "<loopback>";
                var caps = new Dictionary<string, string>
                {
                    ["os"] = Environment.GetEnvironmentVariable("PLAYWRIGHT_SERVICE_OS") ?? "linux",
                    ["runId"] = Environment.GetEnvironmentVariable("RELEASE_RELEASENAME") ?? DateTime.Now.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture),
                };
                var wsEndpoint = $"{serviceUrl}?cap={JsonSerializer.Serialize(caps)}";
                var connectOptions = new BrowserTypeConnectOptions
                {
                    Timeout = 3 * 60 * 1000,
                    ExposeNetwork = exposeNetwork,
                    Headers = new Dictionary<string, string>
                    {
                        ["x-mpt-access-key"] = accessKey
                    }
                };
                return new Tuple<string, BrowserTypeConnectOptions>(wsEndpoint, connectOptions);
            }
            else
            {
                return new Tuple<string, BrowserTypeConnectOptions>(null, null);
            }
        }

and use it in 

            // service configuration
            Tuple<string, BrowserTypeConnectOptions> serviceConfig = PlaywrightServiceConfiguration();
            var browserTypeLaunchOptions = new BrowserTypeLaunchOptions()
            {
                Headless = StartConfiguration.Headless,
                Channel = StartConfiguration.Browser,
                //Args = new[] { "--start-maximized" }
                //SlowMo = 200
            };

if (serviceConfig.Item1.IsNullOrEmpty() || serviceConfig.Item2 is null)
                Browser = await BrowserType.LaunchAsync(browserTypeLaunchOptions).ConfigureAwait(false);
            else
                Browser = await BrowserType.ConnectAsync(serviceConfig.Item1, serviceConfig.Item2).ConfigureAwait(false);