Go test workshop

Plan

Part 1: Fundamentals of Testing in Go (1 hour)

• Introduction to Go’s standard testing library
• Introduction to Test-Driven Development (TDD)
• Test naming, output, and failure diagnostics

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Part 2: Test Structure (1 hour)

• Table-Driven Tests
• Writing DRY and readable test suites
• Using t.Run to structure subtests
• Hands-on: Table-driven tests for various scenarios

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Part 3: Test Organization and Coverage (1 hour)

• Organizing tests in packages
• Code coverage: generating and interpreting with go test -cover
• Using go tool cover for visual coverage
• Hands-on: Refactor tests and check coverage

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Break (30 minutes)

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Part 4: Mocks and Dependency Isolation (1 hour)

• Interfaces for testability
• Manual mocking vs. mocking frameworks
• Mocking time (clockwork)
• Hands-on: Writing and using mocks in service layer tests

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Part 5: Advanced Topics – Benchmarking, Concurrency, and Integration (1 hour)

• Writing performance benchmarks with BenchmarkXxx
• Testing concurrent code (data races, -race flag, testing/synctest)
• Creating mock containers for integration tests.
• Hands-on: Writing a benchmark and a concurrent test

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Part 6: Test Frameworks and Best Practices (1 hour)

• Using stretchr/testify for more expressive assertions
• Setup / teardown strategies ()
• Golden files and snapshot testing
• Hands-on: Convert basic tests to use testify

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Takeaways:

By the end of the training, participants will:

• Understand how to write and structure tests in Go
• Be able to test real-world codebases with unit, integration, and concurrent tests
• Know how to use tools like testify, go test, and code coverage utilities effectively
• Be familiar with Go testing patterns and performance testing (edited)