Go / Intermediate: Packages and Concurrent Work

Go β€” Intermediate: Packages and Concurrent Work

Compose testable packages, bounded I/O, HTTP, contexts, and channels.

6 lessons Β· No account required

What you will learn

  • Separate package interfaces from implementation details.
  • Test failure paths and resource cleanup.
  • Coordinate goroutines with explicit completion protocols.

  1. Packages and API Boundaries

    Design cohesive packages with small exported contracts, explicit dependencies, and reproducible module requirements.

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  2. Testing and Fuzzing Contracts

    Derive meaningful checks from domain promises and use Go’s testing tools without confusing coverage with proof.

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  3. I/O Streams, Files, and Bounded Records

    Process stream results in the correct order, enforce size policies, and make resource ownership explicit.

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  4. Context, Deadlines, and Cancellation

    Propagate operation lifetime across calls and distinguish requesting cancellation from waiting for work to stop.

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  5. HTTP Handlers and Clients

    Compose bounded HTTP behavior, test handlers without external services, and define request and resource lifetimes.

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  6. Goroutines, Channels, and Completion

    Coordinate concurrent work through explicit communication, channel ownership, and observable completion rather than sleeps.

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