public void AllInvokeMethods_AreThreadSafe()
{
// Arrange
StaticNodeJSService.DisposeServiceProvider(); // In case previous test registered a custom service
// Act
var results = new ConcurrentQueue <string>();
const int numThreads = 5;
var threads = new List <Thread>();
for (int i = 0; i < numThreads; i++)
{
var thread = new Thread(() => results.Enqueue(StaticNodeJSService.InvokeFromStringAsync <string>("module.exports = (callback) => callback(null, process.pid);").GetAwaiter().GetResult()));
threads.Add(thread);
thread.Start();
}
foreach (Thread thread in threads)
{
thread.Join();
}
// Assert
Assert.Equal(numThreads, results.Count);
Assert.Single(results.Distinct()); // All invocations should run in process started by first invocation
}
public async void DisposeServiceProvider_RestartsNodeJSProcess()
{
// Arrange
const string dummyTestVariableName = "TEST_VARIABLE";
const string dummyTestVariableValue = "testVariableValue";
StaticNodeJSService.Configure <NodeJSProcessOptions>(options => options.EnvironmentVariables.Add(dummyTestVariableName, dummyTestVariableValue));
string result1 = await StaticNodeJSService.
InvokeFromStringAsync <string>($"module.exports = (callback) => callback(null, process.env.{dummyTestVariableName});").ConfigureAwait(false);
// Act
StaticNodeJSService.DisposeServiceProvider(); // Dispose, environment variable should not be set in the next call
// Assert
string result2 = await StaticNodeJSService.
InvokeFromStringAsync <string>($"module.exports = (callback) => callback(null, process.env.{dummyTestVariableName});").ConfigureAwait(false);
Assert.Equal(dummyTestVariableValue, result1);
Assert.Equal(string.Empty, result2);
}
public async void DisposeServiceProvider_DisposesServiceProvider()
{
// Arrange
const string dummyTestVariableName = "TEST_VARIABLE";
const string dummyTestVariableValue = "testVariableValue";
StaticNodeJSService.
Configure <NodeJSProcessOptions>(options => options.EnvironmentVariables.Add(dummyTestVariableName, dummyTestVariableValue));
DummyResult initialInvocationResult = await StaticNodeJSService.
InvokeFromStringAsync <DummyResult>($"module.exports = (callback) => callback(null, {{result: process.env.{dummyTestVariableName}}});").
ConfigureAwait(false);
// Act
StaticNodeJSService.DisposeServiceProvider(); // Dispose, environment variable should not be set in the next call
DummyResult result = await StaticNodeJSService.
InvokeFromStringAsync <DummyResult>($"module.exports = (callback) => callback(null, {{result: process.env.{dummyTestVariableName}}});").
ConfigureAwait(false);
// Assert
Assert.Equal(dummyTestVariableValue, initialInvocationResult.Result);
Assert.Null(result.Result);
}