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WeAreDevelopers LIVE • Apr 5, 2024

Testing web3 applications

Soumaya Erradi

Are wallet popups breaking your Web3 end-to-end tests? Discover how Synpress seamlessly automates MetaMask interactions and smart contract deployments without unreliable workarounds.

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#1 about 3 min

Introduction to testing Web3 frontend applications

Setting up testing for Web3 frontend integrations reduces errors that stem from lacking an established backend.

#2 about 3 min

Introduction to end-to-end testing with Cypress

Cypress provides an easy setup experience alongside real-time reloading to accurately simulate user application interactions.

#3 about 4 min

Comparing Web2 and Web3 application architectures

Web3 transitions applications away from centralized permissions toward decentralized networks via smart contracts and wallet-based identities.

#4 about 4 min

Replacing the backend with smart contracts

Decentralized applications replace conventional databases and backend servers entirely with the Ethereum blockchain and smart contract programs.

#5 about 6 min

Essential Web3 developer tools and application binary interfaces

Application binary interfaces parse complex solidity functions into readable javascript objects mapping inputs and state modifications for frontend integration.

#6 about 8 min

Reading and writing blockchain data with ethers.js

The ethers.js library translates window providers into usable signers for fetching values and executing smart contract transactions.

#7 about 6 min

Solving wallet interaction testing with Synpress

Synpress acts as a crucial wrapper around Cypress to enable interface automation involving external MetaMask popups.

#8 about 5 min

Configuring Cypress and Synpress for Web3

Extending configuration timeouts inside Cypress test suites accommodates the inherently slower confirmation speeds surrounding native blockchain responses.

#9 about 7 min

Automating wallet connections and blockchain transactions

Cypress test scripts securely pass seed phrases to programmatically handle MetaMask account prompts and network verification parameters.

#10 about 3 min

Testing the deployment of NFT smart contracts

Token minting operations rely heavily on properly timed environment delays to confirm transaction generation without throwing disconnected errors.

#11 about 3 min

Keeping up with Web3 testing tools

Balancing newer frameworks like Playwright against the extensive ecosystem support found natively within Cypress requires perpetual evaluation.

#12 about 2 min

Ensuring code safety by testing on blockchain testnets

Running testing configurations exclusively over testnet environments prevents developers from accidentally draining mainnet assets during automation scripts.

#13 about 2 min

Simulating edge cases across web3 application states

Forcing user interface flows through targeted interaction paths ensures reliable frontend behavior regardless of unpredicted blockchain state resolutions.

#14 about 4 min

A non-traditional path into software engineering

Choosing to pursue computer science without initial passion ultimately manifested into an exceptionally rewarding path managing development teams.

Matching moments

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September 25, 2026 · 10:20–10:50

Stage 9

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Open session

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September 24, 2026 · 14:10–14:40

Stage 9

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Open session

World Congress 2026 North America

September 25, 2026 · 11:40–12:10

Stage 2

Reinventing Testing Practices in the AI Era

Eric Deandrea

Java Champion & Senior Principal Software Engineer at IBM

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Senior Staff Software Engineer at Clipboard

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Open session

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September 24, 2026 · 11:20–11:25

Outdoor Stage

Finding the Edges: Testing, Evaluating, and Monitoring Voice AI Agents Before Your Users Do

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CEO of Okareo

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