logo
Tags down

shadow

Best way to unit test classes using streams?


By : user2174889
Date : October 16 2020, 08:10 PM
seems to work fine I found GetBuffer on the MemoryStream which allows me to convert the raw buffer into a string and I can unit test the actual JSON blob however I want... here is what I wrote:
code :
    [TestMethod]
    public void TestSerialize()
    {
        var serializer = new MetroLineJSONSerializationStrategy();
        serializer.Source = new MetroLineDetails("Inland Empire Line", Colors.Blue, 'A', "LA Union Station", "San Bernardino", true, true);
        using (var stream = new MemoryStream())
        {
            using (var writer = new StreamWriter(stream))
            {
                serializer.Save(writer);
            }
            var bytes = stream.GetBuffer();
            var json = System.Text.Encoding.UTF8.GetString(bytes);
            Assert.AreEqual('{', json[0]);
        }
    }


Share : facebook icon twitter icon

How can I write a unit test with streams, promises and pipes together?


By : Trish Farley
Date : March 29 2020, 07:55 AM
wish of those help This may not be the prettiest solution but assuming you want to mock s3 and fs and test the on('error') and on('finish') behavior:
You could use a custom s3 mocking class, stub the original s3 and fs with sinon and trigger the events you want to test.
code :
// Custom S3 Mocking Library
class S3MockLibrary {
  constructor() {
    this.events = {};
  }
  getObject(options) {
    return this;
  }
  createReadStream() {
    return this;
  }
  on(event, func) {
    this.events[event] = func;
    return this;
  }
  pipe(file) {
    return this;
  }
  emit(event, err) {
    this.events[event](err);
  }
}
it('should verify', async () => {
  const s3Mock = new S3MockLibrary();
  const fsStub = sinon.stub(fs, 'createWriteStream').returns('success');
  const s3Stub = sinon.stub(s3, 'getObject').returns(s3Mock);

  // Emit the finish event async
  setTimeout(() => {
    s3Mock.emit('finish');
  }, 0);
  const result = await downloadFromBucket('test');

  fsStub.restore();
  s3Stub.restore();

  sinon.assert.calledOnce(fsStub);
  sinon.assert.calledOnce(s3Stub);

  assert.equal(result, `${process.cwd()}/data/test`);
});
it('should fail', async () => {
  const s3Mock = new S3MockLibrary();
  const fsStub = sinon.stub(fs, 'createWriteStream').returns('success');
  const s3Stub = sinon.stub(s3, 'getObject').returns(s3Mock);

  setTimeout(() => {
    s3Mock.emit('error', 'testError');
  }, 0);
  let error;
  await downloadFromBucket('test').catch((err) => {
    error = err;
  });

  fsStub.restore();
  s3Stub.restore();

  sinon.assert.calledOnce(fsStub);
  sinon.assert.calledOnce(s3Stub);

  assert.equal(error, 'testError');
});

How to unit test Java 8 streams?


By : user1230622
Date : March 29 2020, 07:55 AM
it fixes the issue list.stream().forEach(e -> { dbCall.delete(e.Id());}); , You can use JUnit's InOrder.
code :
DbCall dbCall = mock(DbCall.class);
List<Element> list = Arrays.asList(newElement(1), newElement(2), newElement(3));

runDeleteMethod(list);

InOrder inorder = inOrder(dbCall);
inorder.verify(dbCall).delete(1);
inorder.verify(dbCall).delete(2);
inorder.verify(dbCall).delete(3);

Android - Is it possible to access instrumened test and unit test classes in androidTest and test folders programmatical


By : Chandra Mohan
Date : March 29 2020, 07:55 AM
may help you .
is there a way to access the test classes in androidTest and test folders from code?

How to unit test the Kafka Streams and Producer APIs together


By : petrhanak
Date : March 29 2020, 07:55 AM
This might help you You should not use a custom Producer but add a sink to your Topology. Calls to Producer.send() are async and thus you might be subject to data loss. To avoid data loss, you would need to make the call sync, ie, get the Future that is returned by send() and wait for its completion before process() returns. However, this has a big impact on your throughput and is not recommended.
If you add a sink you avoid those issue as Kafka Streams will now understand what data was sent to the output topic, and thus no data loss will happen, while Kafka Streams can use the more performant async call.

How to unit test Kafka Streams


By : BlueBones
Date : March 29 2020, 07:55 AM
hope this fix your issue I found a way around this, I'm not sure it is THE answer especially after https://stackoverflow.com/users/4953079/matthias-j-sax comment. In any case, sharing what I have so far...
I completely copied ProcessorTopologyTestDriver from the 0.10.1 branch (that's the version I'm using).
Related Posts Related Posts :
  • Return type as IEnumerable instead of just List?
  • How to get transient DbContext in ASP.NET MVC Core?
  • Grouping data in ViewModel ASP.NET MVC & C#
  • Using a parameter's property in an ArgumentException
  • EF Unable to determine the relationship represented by navigation property
  • Moq: running flows with FluentValidation
  • "Reset" switch statement after value is equal
  • What does the question mark followed by a period mean if it is next to a variable?
  • How to P/Invoke os_log?
  • Deep copy object properties (including those with private setter) to another object of the same type
  • How to generate new back colour if two object's back colour match?
  • How to calculate percentage of value inside arbitrary range?
  • typeof(T) when T is dynamically created is null?
  • Run the application faster with Run Query at Start
  • c# code returns System.Data.DataSet instead of Data itself?
  • Compile binaries to multiple versions of .NET Framework using Bazel
  • How to hide table rows in a DataList if column data returns null from SQL Server
  • Exception handling with lambda/linq statements
  • Creating a meal Cost calculator C#
  • Plugin Failing on D365 v9 Online when I just have tracers to test execution
  • ASP.NET MVC Deleting row from one table after copying it to another table
  • Error VSSDK1001: Unable to find Microsoft.VisualStudio.CommandTable.VSCTCompiler type
  • Trying to fetch a string from another form but i get string value null
  • Entity Framework equivalent of the following query?
  • How do I get projection of one list to another with Linq?
  • I am using Alpha Vantage API to try and pull daily stock info. I am really new to using APIs and don't know what I am do
  • Get column names and types out of XMLSchema
  • Unable to read large log file with MemoryMappedViewStream
  • looping through file to add to datagridview
  • C# How do I ask for Admin, without "forcing" him
  • System.ComponentModel.Win32Exception: "The system cannot find the file specified"
  • How to add list to SQL query?
  • Visitor pattern: Number arithmetics based on input
  • How to remove a single DataLabel from a Chart made with EPPlus and C#
  • GameObjects will not load after game Restarts
  • Getting all dates between two dates using datepickers and Entity Framework 6
  • What should TResult be when using public async Task to return json response from API HTTP Post
  • Automapper Sub Property Mapping
  • reading a json file exception "Unhandled Exception: System.TypeInitializationException: The type initializer for &q
  • How to get MacOS username in .NET Core console app?
  • How can I extract the first word of every line of a text file in C#
  • HttpClient isn't using Client Certificate for Mutual TLS Auth
  • How do I make a generic dictionary for multiple types implementing the same interface?
  • C# Form add controls on runtime
  • C# - program about while loop
  • Accessing variables in other Windows Form class C#
  • How to display tooltip / context menu from Run object in (wpf) RichTextBox
  • How to get a 0 before a datetime day when the day is below 10 in C#
  • Nothing shows when I tried to fill Combobox with .csv filenames
  • RSA Crypto: Is it require to store keypair after geneating first time
  • potential problems with c# with windows 7 due to .net versions
  • ASP.NET Core 2.1 RedirectToAction appends TempData to url
  • Random Number Generator using C#
  • Mixing MockVerify and FluentAssertions.Should() in C#
  • IdentityServer4 and Web Api in one project fails to authenticate
  • WebApi Core project debug is hanging on await client.GetAsync
  • Why can't I load System.Security.Cryptography.ProtectedData when it's on the same directory as the executable
  • Regular expression repeated sequence of characters
  • How to check all checkbox by pressing one?
  • Is it possible to use Plotly.js in a C# Winforms WebBrowser component?
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org