Agreements: What is the best way to align a sum/union type?

Is there a way to create an appropriate matcher in pacts (javascript version, consumer site) for an api endpoint that returns an array of a sum type?

For example, consider the scenario where we have the endpoint /api/events that gives back a list of dictionaries representing different types of events. Let's say there are two distinct event types:

interface ContentAddedEvent {
  type: "ContentAdded"
  newContent: string
}

interface UserRegisteredEvent {
  type: "Userregistered"
  username: string
}

type Event = ContentAddedEvent | UserRegisteredEvent

The endpoint /api/events retrieves an array of the type Event[]. How can a suitable matcher be crafted for this situation? I couldn't find a clear example on guiding me through it...

Answer №1

Are you looking for assistance with a specific programming language? While this is tagged pact-jvm, the question seems to be related to JavaScript?

In most current scenarios, it would be necessary to create separate tests for each of the two situations (e.g. one test for ContentAddedEvent and another for UserRegisteredEvent)

To understand more about the challenge of optional attributes, check out . Pact requires checking all variations in a union to ensure contract support.

We now have a new matching tool called arrayContaining that verifies the existence of at least one type of each. Refer to https://github.com/pact-foundation/pact-js/tree/feat/v3.0.0#array-contains-matcher for guidance on using this feature. It should work across JavaScript and JVM, though it's currently in the beta phase.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Guide to resetting a CSS animation with pure JavaScript

My flexbox contains 4 images, each triggering an animation on hover. However, the animation stops if I hover over the same image again. I have tried various JavaScript solutions found online to restart the animation, but none seem to be working for me. S ...

Passing a JavaScript parameter into a RAZOR function from the CodeBehind

I am facing an issue with my code. I need to pass the value of a JavaScript variable X as a parameter in the Razor function EXTENDED.ProcessDay() function Test() { var X = document.getElementById("targetID").value; documen ...

A guide to fetching MongoDB data and presenting it in a table with ReactJS

I’m currently facing an issue while trying to display data from my MongoDB database in a table using ReactJS. Instead of getting the expected outcome, all I see is an empty result on the webpage along with some errors shown in the browser console. https ...

Is there a way for me to confirm the presence of a particular object within an array and return a true value

I am working on a form in Angular that includes checkboxes. I want to automatically check the checkbox if the user has a specific role. Here is my current approach: <form [formGroup]="rolesForm"> <label formArrayName="roles" *ngFor=" ...

When the onClick event on one element triggers a change in another element within the

I apologize if the title is not clear. I have a React component with buttons and text, which I have used three times. My goal is for each button to display its respective text when clicked, while hiding the texts associated with the other buttons. While m ...

What are the best practices for implementing dependency injection in Node.js for optimal efficiency?

Let's dive into some example code snippets const express = require('express'); const app = express(); const session = require('express-session'); app.use(session({ store: require('connect-session-knex')() })); ...

Utilizing the power of jQuery alongside Angular 4

I am trying to display a bootstrap modal but keep encountering an error message: SectionDetailComponent.html:54 ERROR TypeError: $(...).modal is not a function This is how my .angular-cli file looks like: "scripts": [ "../node_modules/jquery/dist/jq ...

Prevent elements from being altered using Angular or JavaScript

I need to prevent my element from being edited via any source, including Angular or JavaScript. This is what I've tried: <td> <script type="text/javascript"> $("#suppliername").each(function () { $(this).attr("readonly", "1"); ...

Fade in custom PHP error messages

As part of the user signup process on my website, I've created this code to handle form submission after a user enters their email: <?php if(isset($_POST['email'])){ $email_from = $_POST['email']; function died($error) { ...

Linking arrays through a foreign identifier in Angular TypeScript

I have a collection of JSON objects stored in the InMemoryDataService (mock server) and services.ts file. These objects contain various elements that I want to display on an HTML page by replacing productId and shopId with product.name and shop.name resp ...

Is it possible to store a TypeScript type predicate in a variable?

Let's consider a type predicate similar to the one shown in the TypeScript documentation: function isFish(pet: Fish | Bird): pet is Fish { return (pet as Fish).swim !== undefined; } Now, imagine we have some code structured like this: function in ...

Create dynamic object assignments within JavaScript objects

Check out this object sample, I want to iterate through and dynamically assign {"type": "object"} within each inner object. Input: var favoriteFruit = { "Amy": { "desc": "Amy's fav", "fruit": { "Name" : "Banana", ...

What is the method for determining the type of search results returned by Algolia?

My connection between firestore and algoliasearch is working well. I am implementing it with the help of typescript in nextjs. I am attempting to fetch the results using the following code snippet products = index.search(name).then(({hits}) => { ret ...

What is the best way to ensure that JavaScript form errors disappear as soon as new input is entered?

Below is the code snippet: var nameInput = formHandle.f_Name; var idInput = formHandle.f_Id; // VALIDATING NAME if(nameInput.value === ""){ nameMsg = document.getElementById("nameErr"); nameMsg.style.background ...

Ordering AngularJS by property name with spaces

While working with the MEAN stack and jade, I encountered an issue with AngularJS when using ng-repeat, ng-click, and orderby to sort columns in a table. Everything was working well until I tried sorting by a column named "To Do" which contains a space. Th ...

"Upon reloading my page, I discovered that my data in Vue.js was lost

I'm encountering an issue with page reloads. Whenever I save on Vscode, it displays correctly on my HTML page. However, upon refreshing the page, the data becomes undefined. The data in the store is functioning properly, but it seems to be only affe ...

Searching and adding new elements to a sorted array of objects using binary insertion algorithm

I'm currently working on implementing a method to insert an object into a sorted array using binary search to determine the correct index for the new object. You can view the code on codesanbox The array I have is sorted using the following comparis ...

Is there a way to have the collapsible content automatically expanded upon loading?

I came across a tutorial on w3school (https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_collapsible_symbol), which demonstrates collapsible content hidden by default. The code snippet from the link is provided below. Can someone assist me in cha ...

Filtering an array of objects based on a specific condition in TypeScript

I am trying to filter the array object data where the count of Failed is greater than 0. Unfortunately, the code below is not working as expected. ngOnInit() { this.employeeService.getProducts().subscribe((data:any) => { console.log(data); this. ...

Is SSG the best approach for deploying a Nuxt.js dashboard?

We have plans to create an internal dashboard utilizing Nuxt.js. Since this dashboard will be used internally, there is no requirement for a universal mode. Typically, most dashboards are designed as SPAs (Single Page Applications). However, SPAs still ne ...