Why Webapp?

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The Problems

If you’re using Cypress, Test Cafe, Selenium, or any other testing library for a full-stack webapp, you’ve probably faced significant problems when running them in CI:

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1. It’s hard to start webservers in traditional CI

After setting up CI/CD for a webapp, the next step is often creating a copy of the entire app in order to run end-to-end tests.

Without webapp.io, there are two common approaches to doing this in CI:

• Use your production cloud provider, and create staging environments ($$$, slow)
• Start the stack for the duration of the pipeline (slow, hard to debug)

How webapp.io solves this problem:

Instead of using a YAML file to configure CI/CD in webapp.io, our users create a Layerfile. Here’s an example:

CopiedFROM vm/node:14
COPY . .
RUN npm install
RUN npm run build
RUN BACKGROUND npm run start
EXPOSE WEBSITE localhost:3000

This syntax is borrowed from Docker’s configuration, and makes it really easy to speed up builds. In this case, we’d skip running npm install for subsequent pipelines unless you change package.json.

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2. It’s hard to review visual changes

Web apps changes are often subjective. Unit tests won’t tell you if changing color: #fefdfa to color: #dabdab will make the app look bad.

Ultimately reviewers need to check out the change and try it out themselves in order to determine if it’s ok or not.

How webapp.io solves this problem:

After making their webapp.io configuration, users can add a single EXPOSE WEBSITE localhost:3000 directive to embed a full-stack preview environment directly into every pull request.

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3. When builds fail, it’s hard to understand why

Usual CI systems make it hard to debug webapp failures by restricting users to only looking at logs.

How webapp.io solves this problem:

Webapp.io embeds debugging terminals below every failed build automatically.

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4. It takes many clicks to get feedback

Most CI/CD systems use a “checks API” to give a pass/fail metric for a pull request.

For example, they might tell you whether a build failed or if a unit test passed.

However, webapps have many numerical metrics like page speed that aren’t necessarily pass/fail.

How webapp.io solves this problem:

Webapp.io allows you to embed customizable widgets into your pull requests so that reviewers can see details about a specific change at a glance.

If you’d like to see a demo of webapp.io, you can try a free tutorial by signing up here.