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assert | Assertion style testing framework. | Unit Testing library

 by   redding Ruby Version: Current License: MIT

 by   redding Ruby Version: Current License: MIT

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kandi X-RAY | assert Summary

assert is a Ruby library typically used in Testing, Unit Testing applications. assert has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.
Assert is an assertion-style testing framework, meaning you use assertion statements to define your tests and create results. Assert uses class-based contexts so if you want to nest your contexts, use inheritance.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • assert has a low active ecosystem.
  • It has 10 star(s) with 1 fork(s). There are 3 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 6 open issues and 127 have been closed. On average issues are closed in 314 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of assert is current.
assert Support
Best in #Unit Testing
Average in #Unit Testing
assert Support
Best in #Unit Testing
Average in #Unit Testing

quality kandi Quality

  • assert has no bugs reported.
assert Quality
Best in #Unit Testing
Average in #Unit Testing
assert Quality
Best in #Unit Testing
Average in #Unit Testing

securitySecurity

  • assert has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
assert Security
Best in #Unit Testing
Average in #Unit Testing
assert Security
Best in #Unit Testing
Average in #Unit Testing

license License

  • assert is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
assert License
Best in #Unit Testing
Average in #Unit Testing
assert License
Best in #Unit Testing
Average in #Unit Testing

buildReuse

  • assert releases are not available. You will need to build from source code and install.
  • Installation instructions are not available. Examples and code snippets are available.
assert Reuse
Best in #Unit Testing
Average in #Unit Testing
assert Reuse
Best in #Unit Testing
Average in #Unit Testing
Top functions reviewed by kandi - BETA

kandi has reviewed assert and discovered the below as its top functions. This is intended to give you an instant insight into assert implemented functionality, and help decide if they suit your requirements.

  • Set all callbacks
  • Asserts the given string to the given block .
  • Load test tests
  • Output the test results
  • Initialize a new CLI instance
  • Checks if line is found
  • Sets the source code to be used to set
  • Builds backtrace
  • Sets the backtrace of the backtrace .
  • Constructs a new test statement .

assert Key Features

assert executable for running tests

run tests by tab completing test file paths

run only test files that have been modified

random order test execution

class-based contexts

multiple before/setup & after/teardown blocks

around blocks

let value declarations

full backtrace for errors

optionally pretty print objects in failure descriptions

stubbing API

factory API

skip to skip tests

Ctrl+c stops tests and prints failures

Usage

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# in test/my_tests.rb

require "assert"

class MyTests < Assert::Context
  test "something" do
    assert_that(1).equals(1)
  end
end

Stub

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myclass = Class.new do
  def my_method
    "my_method"
  end

  def my_value(value)
    value
  end
end
my_object = myclass.new

my_object.my_method
  # => "my_method"
my_object.my_value(123)
  # => 123
my_object.my_value(456)
  # => 456

Assert.stub(my_object, :my_method)
my_object.my_method
  # => StubError: `my_method` not stubbed.
Assert.stub(my_object, :my_method){ "stub-meth" }
my_object.my_method
  # => "stub-meth"
my_object.my_method(123)
  # => StubError: arity mismatch
Assert.stub(my_object, :my_method).with(123){ "stub-meth" }
  # => StubError: arity mismatch

# Call the original method after it has been stubbed.
Assert.stub_send(my_object, :my_method)
  # => "my_method"

Assert.stub(my_object, :my_value){ "stub-meth" }
  # => StubError: arity mismatch
Assert.stub(my_object, :my_value).with(123){ |val| val.to_s }
my_object.my_value
  # => StubError: arity mismatch
my_object.my_value(123)
  # => "123"
my_object.my_value(456)
  # => StubError: `my_value(456)` not stubbed.

# Call the original method after it has been stubbed.
Assert.stub_send(my_object, :my_value, 123)
  # => 123
Assert.stub_send(my_object, :my_value, 456)
  # => 456

# Stub a method while preserving its behavior and return value.
my_value_called_with = nil
Assert.stub_tap(my_object, :my_value) { |value, *args|
  my_value_called_with = args
  Assert.stub(value, :to_s) { "FIREWORKS!" }
}
value = my_object.my_value(123)
  # => 123
my_value_called_with
  # => [123]
value.to_s
  # =>"FIREWORKS!"

# Unstub individual stubs
Assert.unstub(my_object, :my_method)
Assert.unstub(my_object, :my_value)

# OR blanket unstub all stubs
Assert.unstub!

my_object.my_method
  # => "my_method"
my_object.my_value(123)
  # => 123
value = my_object.my_value(456)
  # => 456
value.to_s
  # => "456"

Factory

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require "assert/factory"

Assert::Factory.integer    #=> 15742
Assert::Factory.integer(3) #=> 2
Assert::Factory.float      #=> 87.2716908041922
Assert::Factory.float(3)   #=> 2.5466638138805

Assert::Factory.date       #=> #<Date: 4915123/2,0,2299161>
Assert::Factory.time       #=> Wed Sep 07 10:37:22 -0500 2016
Assert::Factory.datetime   #=> #<DateTime: 302518290593/43200,0,2299161>

Assert::Factory.string     #=> "boxsrbazeq"
Assert::Factory.string(3)  #=> "rja"
Assert::Factory.text       #=> "khcwyizmymajfzzxlfwz"
Assert::Factory.text(3)    #=> "qcy"
Assert::Factory.slug       #=> "licia"
Assert::Factory.slug(3)    #=> "luu"
Assert::Factory.hex        #=> "48797adb33"
Assert::Factory.hex(3)     #=> "2fe"
Assert::Factory.url        #=> "/cdqz/hqeq/zbsl"
Assert::Factory.email      #=> "vyojvtxght@gmrin.com"

Assert::Factory.file_name  #=> "kagahm.ybb"
Assert::Factory.path       #=> "jbzf/omyk/vbha"
Assert::Factory.dir_path   #=> "fxai/lwnq/urqu"
Assert::Factory.file_path  #=> "bcno/pzxg/gois/mpvlfo.wdr"

Assert::Factory.binary     #=> "\000\000\003S"
Assert::Factory.boolean    #=> false

CLI

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$ assert --help

Configuring Assert

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Assert.configure do |config|
  # set your config options here
end

Running Tests

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require "my_awesome_runner_class"

Assert.configure do |config|
  config.runner MyAwesomeRunnerClass.new
end

Test Dir

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Assert.configure do |config|
  config.test_dir "testing"
end

Test Helper File

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Assert.configure do |config|
  config.test_helper "some_helpers.rb"
end

Test Order

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Assert.configure do |config|
  config.runner_seed 1234
end

Run a single test

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$ assert [-t|--single-test] ./path/for/tests.rb:123

Verbose Output

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Assert.configure do |config|
  config.verbose true
end

Capture Output

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Assert.configure do |config|
  config.capture_output true
end

Failure Handling

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Assert.configure do |config|
  config.halt_on_fail false
end

Changed Only

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Assert.configure do |config|
  config.changed_only true  # not recommended - use the CLI with the `-c` flag
end

Pretty Printing values in fail messages

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Assert.configure do |config|
  config.pp_objects true
end

Viewing Test Results

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Assert.configure do |config|
  config.view.styled false
end

Using 3rd party views

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Assert::View.require_user_view "/path/to/my/view"

Installation

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$ gem install assert

QtTest under PyQt5 fails when widgets-under-test have to be visible to work

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class WidgetTest(unittest.TestCase):
    def init(self):
        """Instantiate widget-under-test and assert default settings"""
        self.form = mwe_qt_widget.MyWidget()
        self.form.show()
        self.assertEqual(self.form.cmb.currentText(), "A")
        self.assertEqual(self.form.lbl.text(), "default")

Problem with RecyclerView and Navigation Drawer

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    public class ChatFragment extends Fragment {

    private FirebaseAuth auth;
    private final DatabaseReference rootReference = FirebaseDatabase.getInstance().getReference();
    private final DatabaseReference messagesReference = rootReference.child("messages");
    private User user;
    private List<Message> messages;
    private RecyclerView recyclerViewMessageList;
    private EditText editTextChatSendMessage;
    private ImageView imageViewChatSendMessage;
    private Context context;
    private SharedPreferences sharedPreferences;
    private final Gson gson = new Gson();
    private MessageAdapter messageAdapter;
    private ConstraintLayout loadingLayout;
    private LottieAnimationView lottieAnimationViewLoading;

    public ChatFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        context = getActivity();
        assert context != null;
        sharedPreferences = context.getSharedPreferences(Constants.sharedPreferencesDocName, Context.MODE_PRIVATE);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_chat, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        init();
        bindUI(view);
        setListeners();
    }

    private void bindUI(View view) {
        recyclerViewMessageList = view.findViewById(R.id.recyclerViewMessageList);
        editTextChatSendMessage = view.findViewById(R.id.editTextChatSendMessage);
        imageViewChatSendMessage = view.findViewById(R.id.imageViewChatSendMessage);
        user = gson.fromJson(sharedPreferences.getString("user", null), User.class);
        loadingLayout = view.findViewById(R.id.loadingLayout);
        lottieAnimationViewLoading = view.findViewById(R.id.lottieAnimationViewLoading);
        setAdapter();
    }

    private void setListeners() {
        recyclerViewMessageList.addOnLayoutChangeListener((v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom) -> {
            if (bottom < oldBottom) {
                recyclerViewMessageList.post(() -> {
                    if (messages != null) {
                        recyclerViewMessageList.scrollToPosition(messages.size() - 1);
                    }
                });
            }
        });
        imageViewChatSendMessage.setOnClickListener(view -> {
            if (!TextUtils.isEmpty(editTextChatSendMessage.getText().toString())) {
                final Date currentTime = new Date();
                @SuppressLint("SimpleDateFormat") SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
                TimeZone timeZone = simpleDateFormat.getTimeZone();
                simpleDateFormat.setTimeZone(timeZone);
                String date = simpleDateFormat.format(currentTime);
                final Message message = new Message(user.getId(), user.getUsername(), editTextChatSendMessage.getText().toString().trim(), date);
                editTextChatSendMessage.setText("");
                messagesReference.push().setValue(message);
                messageAdapter.notifyDataSetChanged();
            }
        });
    }

    private void init() {
        auth = FirebaseAuth.getInstance();
        user = new User();
        messages = new ArrayList<>();
    }

    private void setAdapter() {
        loadingLayout.setVisibility(View.VISIBLE);
        final FirebaseUser currentUser = auth.getCurrentUser();
        assert currentUser != null;

        messagesReference.limitToLast(100).addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(@NonNull DataSnapshot snapshot, @Nullable String previousChildName) {
                final Message message = snapshot.getValue(Message.class);
                assert message != null;
                message.setKey(snapshot.getKey());
                if (isNetworkConnected()) {
                    messages.add(message);
                } else {
                    Toast.makeText(getActivity(), R.string.no_network_available, Toast.LENGTH_SHORT).show();
                }
                displayMessages(messages);
            }

            @Override
            public void onChildChanged(@NonNull DataSnapshot snapshot, @Nullable String previousChildName) {
                Message message = snapshot.getValue(Message.class);
                assert message != null;
                message.setKey(snapshot.getKey());

                List<Message> newMessages = new ArrayList<>();
                for (Message m : messages) {
                    if (m.getKey().equals(message.getKey())) {
                        newMessages.add(message);
                    } else {
                        newMessages.add(m);
                    }
                }
                messages = newMessages;
                displayMessages(messages);
            }

            @Override
            public void onChildRemoved(@NonNull DataSnapshot snapshot) {
                Message message = snapshot.getValue(Message.class);
                assert message != null;
                message.setKey(snapshot.getKey());

                List<Message> newMessages = new ArrayList<>();

                for (Message m : messages) {
                    if (!m.getKey().equals(message.getKey())) {
                        newMessages.add(m);
                    }
                }
                messages = newMessages;
                displayMessages(messages);
            }

            @Override
            public void onChildMoved(@NonNull DataSnapshot snapshot, @Nullable String previousChildName) {

            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
        linearLayoutManager.setStackFromEnd(true);
        recyclerViewMessageList.setLayoutManager(linearLayoutManager);
        MessageAdapter messageAdapter = new MessageAdapter(getActivity(), messages);
        recyclerViewMessageList.setAdapter(messageAdapter);
        messageAdapter.notifyDataSetChanged();
        recyclerViewMessageList.scrollToPosition(messages.size() - 1);
    }

    @Override
    public void onStart() {
        super.onStart();
    }

    private void displayMessages(List<Message> messages) {
        messageAdapter = new MessageAdapter(getActivity(), messages);
        recyclerViewMessageList.setAdapter(messageAdapter);
        recyclerViewMessageList.scrollToPosition(messages.size() - 1);
        messageAdapter.notifyDataSetChanged();
        loadingLayout.setVisibility(View.GONE);
        lottieAnimationViewLoading.cancelAnimation();
    }

    private boolean isNetworkConnected() {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
    }
}

How to properly use Executer In Room Android

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public class Repository {
private UserDAO userDAO;
private List<SubtaskDetails> subtaskDetails;
private Executor executor = Executors.newSingleThreadExecutor();


public Repository(Application application){
    AppDatabase appDatabase = AppDatabase.getInstance(application);
    userDAO = appDatabase.userDAO();
    subtaskDetails = userDAO.getSubtaskDetailsList();
}
    public void insertSubtaskDetails(SubtaskDetails subtaskDetails){
    executor.execute(new Runnable() {
        @Override
        public void run() {
            userDAO.insertSubtaskDetails(subtaskDetails);

        }
    });
}// For inserting

  public void deleteSubtaskDetails(SubtaskDetails subtaskDetails){
    executor.execute(new Runnable() {
        @Override
        public void run() {
            userDAO.deleteSubtaskDetails(subtaskDetails);

        }
    });
}// for deleting 
-----------------------
public class Repository {
private UserDAO userDAO;
private List<SubtaskDetails> subtaskDetails;
private Executor executor = Executors.newSingleThreadExecutor();


public Repository(Application application){
    AppDatabase appDatabase = AppDatabase.getInstance(application);
    userDAO = appDatabase.userDAO();
    subtaskDetails = userDAO.getSubtaskDetailsList();
}
    public void insertSubtaskDetails(SubtaskDetails subtaskDetails){
    executor.execute(new Runnable() {
        @Override
        public void run() {
            userDAO.insertSubtaskDetails(subtaskDetails);

        }
    });
}// For inserting

  public void deleteSubtaskDetails(SubtaskDetails subtaskDetails){
    executor.execute(new Runnable() {
        @Override
        public void run() {
            userDAO.deleteSubtaskDetails(subtaskDetails);

        }
    });
}// for deleting 

The following error java.lang.NullPointerException is displayed after run the project

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driver = new ChromeDriver();
-----------------------
java.lang.NullPointerException
    at java.util.Objects.requireNonNull(Objects.java:203)
    at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:106)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:85)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
    at Tests.Test(Tests.java:15)
WebDriverWait wait = new WebDriverWait(driver, 6000);
public class Hooks
{
    public WebDriver driver;

public class Hooks
{
    public WebDriver driver;
   @BeforeMethod
    public void Setup() throws InterruptedException
    {
        ...
        WebDriver driver = new ChromeDriver();
        ...
    }
-----------------------
java.lang.NullPointerException
    at java.util.Objects.requireNonNull(Objects.java:203)
    at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:106)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:85)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
    at Tests.Test(Tests.java:15)
WebDriverWait wait = new WebDriverWait(driver, 6000);
public class Hooks
{
    public WebDriver driver;

public class Hooks
{
    public WebDriver driver;
   @BeforeMethod
    public void Setup() throws InterruptedException
    {
        ...
        WebDriver driver = new ChromeDriver();
        ...
    }
-----------------------
java.lang.NullPointerException
    at java.util.Objects.requireNonNull(Objects.java:203)
    at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:106)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:85)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
    at Tests.Test(Tests.java:15)
WebDriverWait wait = new WebDriverWait(driver, 6000);
public class Hooks
{
    public WebDriver driver;

public class Hooks
{
    public WebDriver driver;
   @BeforeMethod
    public void Setup() throws InterruptedException
    {
        ...
        WebDriver driver = new ChromeDriver();
        ...
    }
-----------------------
java.lang.NullPointerException
    at java.util.Objects.requireNonNull(Objects.java:203)
    at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:106)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:85)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
    at Tests.Test(Tests.java:15)
WebDriverWait wait = new WebDriverWait(driver, 6000);
public class Hooks
{
    public WebDriver driver;

public class Hooks
{
    public WebDriver driver;
   @BeforeMethod
    public void Setup() throws InterruptedException
    {
        ...
        WebDriver driver = new ChromeDriver();
        ...
    }
-----------------------
java.lang.NullPointerException
    at java.util.Objects.requireNonNull(Objects.java:203)
    at org.openqa.selenium.support.ui.FluentWait.<init>(FluentWait.java:106)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:85)
    at org.openqa.selenium.support.ui.WebDriverWait.<init>(WebDriverWait.java:45)
    at Tests.Test(Tests.java:15)
WebDriverWait wait = new WebDriverWait(driver, 6000);
public class Hooks
{
    public WebDriver driver;

public class Hooks
{
    public WebDriver driver;
   @BeforeMethod
    public void Setup() throws InterruptedException
    {
        ...
        WebDriver driver = new ChromeDriver();
        ...
    }

How to assign key,value to map[interface{}]interface{}?

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func MapConvert(mss map[string]string) map[interface{}]interface{} {
    ifaceMap := map[interface{}]interface{}{}
    for k, v := range mss {
        ifaceMap[k] = v
    }
    return ifaceMap
}
type InterfaceMap map[interface{}]interface{}

func MapConvert(mss map[string]string) *InterfaceMap {
    ifaceMap := InterfaceMap{}
    for k, v := range mss {
        ifaceMap[k] = v
    }
    return &ifaceMap
}
-----------------------
func MapConvert(mss map[string]string) map[interface{}]interface{} {
    ifaceMap := map[interface{}]interface{}{}
    for k, v := range mss {
        ifaceMap[k] = v
    }
    return ifaceMap
}
type InterfaceMap map[interface{}]interface{}

func MapConvert(mss map[string]string) *InterfaceMap {
    ifaceMap := InterfaceMap{}
    for k, v := range mss {
        ifaceMap[k] = v
    }
    return &ifaceMap
}
-----------------------
func createMockInterfaceMap(in map[string]string) *utils.InterfaceMap{
    mockMap := sync.Map{}
    for key, value := range in {
        mockMap.Store(key, value)
    }

    iMap := utils.InterfaceMap(mockMap)

    return &iMap
}
{
    name: "test",
    args: args{
        res: createMockInterfaceMap(map[string]string{
            `key1`:`value1`,
            `key2`:`value2`,
        }),
    },
    wantErr: false,
},
-----------------------
func createMockInterfaceMap(in map[string]string) *utils.InterfaceMap{
    mockMap := sync.Map{}
    for key, value := range in {
        mockMap.Store(key, value)
    }

    iMap := utils.InterfaceMap(mockMap)

    return &iMap
}
{
    name: "test",
    args: args{
        res: createMockInterfaceMap(map[string]string{
            `key1`:`value1`,
            `key2`:`value2`,
        }),
    },
    wantErr: false,
},

Why does NUnit tell me &quot;Not enough arguments provided, provide at least 2 arguments.&quot; when I'm providing 2 arguments?

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public static IEnumerable<TestCaseData> DecimalTestData { get; } = new[]
{
    new TestCaseData(0m, 0),
    ...
}

ScalaTest error object flatspec is not a member of package org.scalatest

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        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_2.10</artifactId>
            <version>2.2.6</version>
            <scope>test</scope>
        </dependency>
import org.scalatest._

abstract class UnitSpec extends FlatSpec with Matchers with OptionValues with Inside  with Inspectors
-----------------------
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_2.10</artifactId>
            <version>2.2.6</version>
            <scope>test</scope>
        </dependency>
import org.scalatest._

abstract class UnitSpec extends FlatSpec with Matchers with OptionValues with Inside  with Inspectors

Lookahead in regular expressions

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1: A(?=B)
2: (?=B)
3: (?=\w)(?=\d)
-----------------------
1: A(?=B)
2: (?=B)
3: (?=\w)(?=\d)
-----------------------
1: A(?=B)
2: (?=B)
3: (?=\w)(?=\d)

How to run a Spark-Scala unit test notebook in Databricks?

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(new ImsLoyaltyTest).execute()
import org.scalatest._

nocolor.durations.stats.run(new ImsLoyaltyTest)
-----------------------
(new ImsLoyaltyTest).execute()
import org.scalatest._

nocolor.durations.stats.run(new ImsLoyaltyTest)

Flutter : No ScaffoldMessenger widget found

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final _messangerKey = GlobalKey<ScaffoldMessengerState>();
_messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
import 'package:flutter/material.dart';

void main() => runApp(MyAppWidget());

class MyAppWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MyAppState();
  }
}

class _MyAppState extends State<MyAppWidget> {
  final _inputKey = GlobalKey<FormState>();
  final _messangerKey = GlobalKey<ScaffoldMessengerState>();
  String inputText = "";

  String appendString() {
    setState(() {
      inputText += inputText;
    });
    return inputText;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      scaffoldMessengerKey: _messangerKey,
      home: Scaffold(
        appBar: AppBar(
          title: Text("Assignment"),
        ),
        body: Form(
          key: _inputKey,
          child: Column(
            children: [
              TextFormField(
                validator: (inputString) {
                  inputText = inputString;
                  if (inputString.length < 5) {
                    return 'Please enter a longer string';
                  }
                  return null;
                },
              ),
              ElevatedButton(
                onPressed: () {
                  if (_inputKey.currentState.validate()) {
                    _messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
                  }
                },
                child: Text("Enter"),
              ),
              Text(appendString())
            ],
          ),
        ),
      ),
    );
  }
}

-----------------------
final _messangerKey = GlobalKey<ScaffoldMessengerState>();
_messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
import 'package:flutter/material.dart';

void main() => runApp(MyAppWidget());

class MyAppWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MyAppState();
  }
}

class _MyAppState extends State<MyAppWidget> {
  final _inputKey = GlobalKey<FormState>();
  final _messangerKey = GlobalKey<ScaffoldMessengerState>();
  String inputText = "";

  String appendString() {
    setState(() {
      inputText += inputText;
    });
    return inputText;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      scaffoldMessengerKey: _messangerKey,
      home: Scaffold(
        appBar: AppBar(
          title: Text("Assignment"),
        ),
        body: Form(
          key: _inputKey,
          child: Column(
            children: [
              TextFormField(
                validator: (inputString) {
                  inputText = inputString;
                  if (inputString.length < 5) {
                    return 'Please enter a longer string';
                  }
                  return null;
                },
              ),
              ElevatedButton(
                onPressed: () {
                  if (_inputKey.currentState.validate()) {
                    _messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
                  }
                },
                child: Text("Enter"),
              ),
              Text(appendString())
            ],
          ),
        ),
      ),
    );
  }
}

-----------------------
final _messangerKey = GlobalKey<ScaffoldMessengerState>();
_messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
import 'package:flutter/material.dart';

void main() => runApp(MyAppWidget());

class MyAppWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MyAppState();
  }
}

class _MyAppState extends State<MyAppWidget> {
  final _inputKey = GlobalKey<FormState>();
  final _messangerKey = GlobalKey<ScaffoldMessengerState>();
  String inputText = "";

  String appendString() {
    setState(() {
      inputText += inputText;
    });
    return inputText;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      scaffoldMessengerKey: _messangerKey,
      home: Scaffold(
        appBar: AppBar(
          title: Text("Assignment"),
        ),
        body: Form(
          key: _inputKey,
          child: Column(
            children: [
              TextFormField(
                validator: (inputString) {
                  inputText = inputString;
                  if (inputString.length < 5) {
                    return 'Please enter a longer string';
                  }
                  return null;
                },
              ),
              ElevatedButton(
                onPressed: () {
                  if (_inputKey.currentState.validate()) {
                    _messangerKey.currentState.showSnackBar(
                        SnackBar(content: Text('Processing Data')));
                  }
                },
                child: Text("Enter"),
              ),
              Text(appendString())
            ],
          ),
        ),
      ),
    );
  }
}

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QUESTION

QtTest under PyQt5 fails when widgets-under-test have to be visible to work

Asked 2021-Jun-15 at 17:01

I've started to create UI tests for my PyQt5 widgets using QtTest but have run into the following difficulties:

  • In order to speed up things, some of my widgets only perform operations when visible. As it seems that QtTest runs with invisible widgets, the corresponding tests fail.

  • For the same reason, I cannot test program logic that makes a subwidget visible under certain conditions.

Is there a way to make widgets visible during test? Is this good practice (e.g. w.r.t. CI test on GitHub) and is QtTest the way to go?

I have tried to use pytest with pytest-qt without success as I couldn't find a proper introduction or tutorial and I do know "Test PyQt GUIs with QTest and unittest".

Below you find a MWE consisting of a widget mwe_qt_widget.MyWidget with a combobox, a pushbutton and a label that gets updated by the other two subwidgets:

from PyQt5.QtWidgets import QComboBox, QWidget, QPushButton, QLabel, QHBoxLayout, QApplication

class MyWidget(QWidget):
    def __init__(self, parent=None):
        super(MyWidget, self).__init__(parent)
        self.n = 0  # click counter
        self.lbl = QLabel("default", self)
        self.but = QPushButton("+ 1", self)
        self.cmb = QComboBox(self)
        self.cmb.addItems(["A", "B", "C"])

        lay_h_main = QHBoxLayout(self)
        lay_h_main.addWidget(self.cmb)
        lay_h_main.addWidget(self.but)
        lay_h_main.addWidget(self.lbl)
        self.setLayout(lay_h_main)

        self.cmb.currentIndexChanged.connect(
            lambda: self.lbl.setText(self.cmb.currentText()+f" {self.n}"))
        self.but.clicked.connect(self.update_label)
    # --------------------------------------------------------------------------
    def update_label(self):
        """count clicks and update label with current combobox text"""
        if self.isVisible():
            self.n += 1
            self.lbl.setText(self.cmb.currentText()+f" {self.n}")
# ==============================================================================
if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    mainw = MyWidget(None)
    app.setActiveWindow(mainw)
    mainw.show()
    sys.exit(app.exec_())

This widget is tested with the following test setup. test_visibility() and test_button() fail because both require that the widget-under-test is visible:

import sys, unittest
import mwe_qt_widget
from PyQt5 import QtTest, QtCore
from PyQt5.QtWidgets import QApplication

class WidgetTest(unittest.TestCase):
    def init(self):
        """Instantiate widget-under-test and assert default settings"""
        self.form = mwe_qt_widget.MyWidget()
        self.assertEqual(self.form.cmb.currentText(), "A")
        self.assertEqual(self.form.lbl.text(), "default")
    # --------------------------------------------------------------------------
    def test_button(self):
        """Test whether button click updates label"""
        self.init()
        QtTest.QTest.mouseClick(self.form.but, QtCore.Qt.LeftButton)
        self.assertEqual(self.form.cmb.currentText(), "A")
        self.assertEqual(self.form.lbl.text(), "A 1")
    # --------------------------------------------------------------------------
    def test_combobox(self):
        """Test whether combobox updates label"""
        self.init()
        QtTest.QTest.keyClick(self.form.cmb, QtCore.Qt.Key_PageDown)
        QtTest.QTest.qWait(100)
        self.assertEqual(self.form.cmb.currentText(), "B")
        self.assertEqual(self.form.lbl.text(), "B 0")
    # --------------------------------------------------------------------------
    def test_visibility(self):
        """Test visibility of widget and subwidgets"""
        self.init()
        self.assertEqual(self.form.isVisible(), True)
        self.assertEqual(self.form.cmb.isVisible(), True)
# ==============================================================================
if __name__ == '__main__':
    app = QApplication(sys.argv)  # Must construct a QApplication before a QWidget
    unittest.main()
    mainw = WidgetTest()
    app.setActiveWindow(mainw)
    mainw.show()

ANSWER

Answered 2021-Jun-15 at 17:01

The problem is simple: QWidgets are hidden by default so isVisible() will return false, the solution is to invoke the show() method in init() to make it visible:

class WidgetTest(unittest.TestCase):
    def init(self):
        """Instantiate widget-under-test and assert default settings"""
        self.form = mwe_qt_widget.MyWidget()
        self.form.show()
        self.assertEqual(self.form.cmb.currentText(), "A")
        self.assertEqual(self.form.lbl.text(), "default")

Source https://stackoverflow.com/questions/67990408

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install assert

You can download it from GitHub.
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Support

The source code is hosted on Github. Feel free to submit pull requests and file bugs on the issues tracker.

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