rspec-wasm Lets Developers Write Native RSpec Tests for Ruby WebAssembly Code

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A developer has released rspec-wasm, an open-source tool that allows Ruby WebAssembly applications to be tested using standard RSpec syntax instead of embedding Ruby code inside JavaScript template literals. Previously, testing ruby.wasm modules required passing stringified Ruby into a JavaScript VM, manually serializing outputs to JSON, and relying on Node.js assertion libraries. rspec-wasm removes that wrapper layer by executing native RSpec directly within a Node.js-based ruby.wasm virtual machine. The tool supports automatic spec file discovery, full IDE features like syntax highlighting and linting, and requires no local Ruby installation — running instantly via npx. It is aimed at developers building Ruby WebAssembly projects who want a cleaner, more idiomatic testing workflow.

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